|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

|  | F01 - F42 |
Note(s) Guide to the use of this subsection (classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04) The following notes are meant to assist in the use of this part of the classification scheme. In this subsection, subclasses or groups designating "engines" or "pumps" cover methods of operating the same, unless otherwise specifically provided for. In this subsection, the following terms or expressions are used with the meanings indicated: "engine" means a device for continuously converting fluid energy into mechanical power. Thus, this term includes, for example, steam piston engines or steam turbines, per se, or internal-combustion piston engines, but it excludes single-stroke devices. "Engine" also includes the fluid-motive portion of a meter unless such portion is particularly adapted for use in a meter; "pump" means a device for continuously raising, forcing, compressing, or exhausting fluid by mechanical or other means. Thus, this term includes fans or blowers; "machine" means a device which could equally be an engine and a pump, and not a device which is restricted to an engine or one which is restricted to a pump; "positive displacement" means the way the energy of a working fluid is transformed into mechanical energy, in which variations of volume created by the working fluid in a working chamber produce equivalent displacements of the mechanical member transmitting the energy, the dynamic effect of the fluid being of minor importance, and vice versa; "non-positive displacement" means the way the energy of a working fluid is transformed into mechanical energy, by transformation of the energy of the working fluid into kinetic energy, and vice versa; "oscillating-piston machine" means a positive-displacement machine in which a fluid-engaging work-transmitting member oscillates. This definition applies also to engines and pumps; "rotary-piston machine" means a positive-displacement machine in which a fluid-engaging work-transmitting member rotates about a fixed axis or about an axis moving along a circular or similar orbit. This definition applies also to engines and pumps; "rotary piston" means the work-transmitting member of a rotary-piston machine and may be of any suitable form, e.g., like a toothed gear; "cooperating members" means the "oscillating piston" or "rotary piston" and another member, e.g., the working-chamber wall, which assists in the driving or pumping action; "movement of the co-operating members" is to be interpreted as relative, so that one of the "co-operating members" may be stationary, even though reference may be made to its rotational axis, or both may move; "teeth or tooth equivalents" include lobes, projections or abutments; "internal-axis type" means that the rotational axes of the inner and outer co-operating members remain at all times within the outer member, e.g., in a similar manner to that of a pinion meshing with the internal teeth of a ring gear; "free piston" means a piston of which the length of stroke is not defined by any member driven thereby; "cylinders" means positive-displacement working chambers in general. Thus, this term is not restricted to cylinders of circular cross-section; "main shaft" means the shaft which converts reciprocating piston motion into rotary motion or vice versa; "plant" means an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam; "working fluid" means the driven fluid in a pump and the driving fluid in an engine. The working fluid may be in a gaseous state, i.e., compressible, or liquid. In the former case coexistence of two states is possible; "steam" includes condensable vapours in general, and "special vapour" is used when steam is excluded; "reaction type" as applied to non-positive-displacement machines or engines means machines or engines in which pressure/velocity transformation takes place wholly or partly in the rotor. Mmachines or engines with no, or only slight, pressure/velocity transformation in the rotor are called "impulse type". In this subsection: cyclically operating valves, lubricating, gas-flow silencers or exhaust apparatus, or cooling are classified in subclasses Fulltext... Hierarchy... Expanded...F01L, Fulltext... Hierarchy... Expanded...F01M, Fulltext... Hierarchy... Expanded...F01N, Fulltext... Hierarchy... Expanded...F01P irrespective of their stated application, unless their classifying features are peculiar to their application, in which case they are classified only in the relevant subclass of classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04; lubricating, gas-flow silencers or exhaust apparatus, or cooling of machines or engines are classified in subclasses Fulltext... Hierarchy... Expanded...F01M, Fulltext... Hierarchy... Expanded...F01N, Fulltext... Hierarchy... Expanded...F01P except for those peculiar to steam engines which are classified in subclass Fulltext... Hierarchy... Expanded...F01B. For use of this subsection with a good understanding, it is essential to remember, so far as subclasses Fulltext... Hierarchy... Expanded...F01B, Fulltext... Hierarchy... Expanded...F01C, Fulltext... Hierarchy... Expanded...F01D, Fulltext... Hierarchy... Expanded...F03B, and Fulltext... Hierarchy... Expanded...F04B, Fulltext... Hierarchy... Expanded...F04C, Fulltext... Hierarchy... Expanded...F04D, which form its skeleton, are concerned: the principle which resides in their elaboration, the classifying characteristics which they call for, and their complementarity. Principle This concerns essentially the subclasses listed above. Other subclasses, notably those of class Fulltext... Hierarchy... Expanded...F02, which cover better-defined matter, are not considered here. Each subclass covers fundamentally a genus of apparatus (engine or pump) and by extension covers equally "machines" of the same kind. Two different subjects, one having a more general character than the other, are thus covered by the same subclass. Subclasses Fulltext... Hierarchy... Expanded...F01B, Fulltext... Hierarchy... Expanded...F03B, Fulltext... Hierarchy... Expanded...F04B, beyond the two subjects which they cover, have further a character of generality in relation to other subclasses concerning the different species of apparatus in the genus concerned. This generality applies as well for the two subjects dealt with, without these always being in relation to the same subclasses. Thus, subclass Fulltext... Hierarchy... Expanded...F03B, in its part dealing with "machines", should be considered as being the general class relating to subclasses Fulltext... Hierarchy... Expanded...F04B, Fulltext... Hierarchy... Expanded...F04C, and in its part dealing with "engines" as being general in relation to subclass Fulltext... Hierarchy... Expanded...F03C. Characteristics The principal classifying characteristic of the subclass is that of genera of apparatus, of which there are three possible: Machines; engines; pumps. As stated above, "machines" are always associated with one of the other two genera. These main genera are subdivided according to the general principles of operation of the apparatus: Positive displacement; non-positive displacement. The positive displacement apparatus are further subdivided according to the ways of putting into effect the principle of operation, that is, to the kind of apparatus: Simple reciprocating piston; rotary or oscillating piston; other kind. Another classifying characteristic is that of the working fluid, in respect of which three kinds of apparatus are possible, namely: Liquid and elastic fluid; elastic fluid; liquid. Complementarity This resides in association of pairs of the subclasses listed above, according to the characteristics under consideration in respect of kind of apparatus or working fluid. The subclasses concerned with the various principles, characteristics and complementarity are shown in the following table: It is seen from this table that: For the same kind of apparatus in a given genus, the characteristic of "working fluid" associates: Fulltext... Hierarchy... Expanded...F01B and Fulltext... Hierarchy... Expanded...F04B Fulltext... Hierarchy... Expanded...F01C and Fulltext... Hierarchy... Expanded...F04C Machines Fulltext... Hierarchy... Expanded...F01D and Fulltext... Hierarchy... Expanded...F03B Fulltext... Hierarchy... Expanded...F01B and Fulltext... Hierarchy... Expanded...F03C Fulltext... Hierarchy... Expanded...F01C and Fulltext... Hierarchy... Expanded...F03C Engines Fulltext... Hierarchy... Expanded...F01D and Fulltext... Hierarchy... Expanded...F03B For the same kind of working fluid, the "apparatus" characteristic relates subclasses in the same way as considerations of relative generality.

ENGINEERING IN GENERAL

|  | F16 |
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL

|  | F16F |
SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION

|  | F16F |
2. Note(s) This subclass covers: springs, shock-absorbers or vibration-dampers; their arrangement in, or adaptation for, particular apparatus, if not provided for in the subclasses covering said apparatus. [5] This subclass does not cover the arrangement or adaptation of springs, shock-absorbers or vibration-dampers in, or for, particular apparatus, if provided for in the subclasses concerning the said apparatus, e.g.
   Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...A47C 23/00-A47C 27/00 | Spring mattresses |
   Fulltext... Hierarchy... Expanded...A63C 5/075 | Vibration dampers in skis |
   Fulltext... Hierarchy... Expanded...B60G | Vehicle suspensions |
   Fulltext... Hierarchy... Expanded...B60R 19/24 | Mounting of bumpers on vehicles |
   Fulltext... Hierarchy... Expanded...B61F | Rail vehicle suspensions |
   Fulltext... Hierarchy... Expanded...B61G 11/00 | Buffers for railway or tramway vehicles |
   Fulltext... Hierarchy... Expanded...B62D 21/15 | Vehicle chassis frames having impact absorbing means |
   Fulltext... Hierarchy... Expanded...B62J 1/02 | Resiliently mounted saddles on cycles |
   Fulltext... Hierarchy... Expanded...B62K 21/08 | Steering dampers |
   Fulltext... Hierarchy... Expanded...B63H 1/15 | Marine propellers having vibration-damping means |
   Fulltext... Hierarchy... Expanded...B63H 21/30 | Anti-vibration mounting of marine propulsion plant in ships |
   Fulltext... Hierarchy... Expanded...B64C 25/58 | Arrangement of shock-absorbers or springs in aeroplane alighting gear |
   Fulltext... Hierarchy... Expanded...B65D 81/02 | Containers, packing elements or packages with shock-absorbing means |
   Fulltext... Hierarchy... Expanded...D06F 37/20 | Resilient mountings in washing machines |
   Fulltext... Hierarchy... Expanded...D06F 49/06 | Resilient mountings in domestic spin-dryers |
   Fulltext... Hierarchy... Expanded...F03G 1/00 | Spring motors |
   Fulltext... Hierarchy... Expanded...F21V 15/04 | Resilient mounting of lighting devices |
   Fulltext... Hierarchy... Expanded...F41A 25/00 | Gun cradles to permit recoil |
   Fulltext... Hierarchy... Expanded...F41B 5/20 | Vibration dampers for archery bows |
   Fulltext... Hierarchy... Expanded...G01D 11/00 | Indicating or recording in connection with measuring |
   Fulltext... Hierarchy... Expanded...G01G 21/10 | Weighing apparatus, e.g. arrangement of shock-absorbers in weighing apparatus |
   Fulltext... Hierarchy... Expanded...G04B | Clocks, watches |
   Fulltext... Hierarchy... Expanded...G12B 3/08 | Damping of movements in instruments |
   Fulltext... Hierarchy... Expanded...G21C 7/20 | Disposition of shock-absorbing devices for displacable control elements in nuclear reactors. |

|  | F16F |
Subclass index
SPRINGS |
Friction type; fluid type; magnetic type | 1/00, 3/00; 5/00, 9/00; 6/00
VIBRATION-DAMPERS OR SHOCK-ABSORBERS |
Friction type; fluid type | 7/00, 11/00; 9/00, 11/00
UNITS COMBINING SPRINGS AND VIBRATION-DAMPERS OR SHOCK-ABSORBERS | 13/00
SUPPRESSION OF VIBRATION, BALANCING | 15/00

|  | F16F 1/00 |
Springs (working with fluid Fulltext... Hierarchy... Expanded...F16F 5/00, Fulltext... Hierarchy... Expanded...F16F 9/00)

|  | F16F 1/02 |
· | made of steel or other material having low internal friction (Fulltext... Hierarchy... Expanded...F16F 1/36 takes precedence); Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant [6]

|  | F16F 1/04 |
· · | Wound springs

|  | F16F 1/06 |
· · · | with turns lying in cylindrical surfaces

|  | F16F 1/08 |
· · · | with turns lying in mainly conical surfaces

|  | F16F 1/10 |
· · · | Spiral springs with turns lying substantially in plane surfaces

|  | F16F 1/12 |
· · · | Attachments or mountings

|  | F16F 1/13 |
· · · · | comprising inserts or spacers between the windings for changing the mechanical or physical characteristics of the spring [6]

|  | F16F 1/14 |
· · | Torsion springs consisting of bars or tubes

|  | F16F 1/16 |
· · · | Attachments or mountings

|  | F16F 1/18 |
· · | Leaf springs

|  | F16F 1/20 |
· · · | with layers, e.g. anti-friction layers, or with rollers between the leaves

|  | F16F 1/22 |
· · · | with means for modifying the spring characteristic

|  | F16F 1/24 |
· · · | Lubrication; Covers, e.g. for retaining lubricant

|  | F16F 1/26 |
· · · | Attachments or mountings (Fulltext... Hierarchy... Expanded...B60G 11/10 takes precedence) [5]

|  | F16F 1/28 |
· · · · | comprising cylindrical metal pins pivoted in close-fitting sleeves

|  | F16F 1/30 |
· · · · | comprising intermediate pieces made of rubber or similar elastic material

|  | F16F 1/32 |
· · | Cup springs; Dished disc springs (diaphragms Fulltext... Hierarchy... Expanded...F16J 3/00)

|  | F16F 1/34 |
· · | Ring springs, i.e. annular bodies deformed radially due to axial load

|  | F16F 1/36 |
· | made of plastics, e.g. rubber; made of material having high internal friction

|  | F16F 1/362 |
· · | made of steel wool or compressed hair [6]

|  | F16F 1/364 |
· · | made of cork, wood or the like material [6]

|  | F16F 1/366 |
· · | made of fibre reinforced plastics [6]

|  | F16F 1/368 |
· · · | Leaf springs [6]

|  | F16F 1/37 |
· · | of foam-like material, e.g. sponge rubber

|  | F16F 1/371 |
· · | characterised by inserts or auxiliary extension elements, e.g. for rigidification (Fulltext... Hierarchy... Expanded...F16F 1/366, Fulltext... Hierarchy... Expanded...F16F 1/387 take precedence) [6]

|  | F16F 1/373 |
· · | characterised by having a particular shape [6]

|  | F16F 1/374 |
· · · | having a spherical or the like shape [6]

|  | F16F 1/376 |
· · · | having projections, studs, serrations or the like on at least one surface (Fulltext... Hierarchy... Expanded...F16F 1/387 takes precedence) [6]

|  | F16F 1/377 |
· · · | having holes or openings (Fulltext... Hierarchy... Expanded...F16F 1/387 takes precedence) [6]

|  | F16F 1/379 |
· · | characterised by arrangements for regulating the spring temperature, e.g. by cooling [6]

|  | F16F 1/38 |
· · | with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin

|  | F16F 1/387 |
· · · | comprising means for modifying the rigidity in particular directions [6]

|  | F16F 1/393 |
· · · | with spherical or conical sleeves [6]

|  | F16F 1/40 |
· · | consisting of a stack of similar elements separated by non-elastic intermediate layers

|  | F16F 1/41 |
· · · | the spring consisting of generally conically arranged elements [6]

|  | F16F 1/42 |
· · | characterised by the mode of stressing

|  | F16F 1/44 |
· · · | loaded mainly in compression

|  | F16F 1/46 |
· · · | loaded mainly in tension

|  | F16F 1/48 |
· · · | loaded mainly in torsion

|  | F16F 1/50 |
· · · | loaded mainly in shear

|  | F16F 1/52 |
· · · | loaded in combined stresses

|  | F16F 1/54 |
· · · · | loaded in compression and shear

|  | F16F 3/00 |
Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic (including fluid springs Fulltext... Hierarchy... Expanded...F16F 5/00, Fulltext... Hierarchy... Expanded...F16F 13/00)

|  | F16F 3/02 |
· | with springs made of steel or of other material having low internal friction

|  | F16F 3/04 |
· · | composed only of wound springs

|  | F16F 3/06 |
· · · | of which some are placed around others in such a way that they damp each other by mutual friction

|  | F16F 3/07 |
· · | combined with chambers filled with gas or liquid

|  | F16F 3/08 |
· | with springs made of a material having high internal friction, e.g. rubber

|  | F16F 3/087 |
· · | Units comprising several springs made of plastics or the like material (Fulltext... Hierarchy... Expanded...F16F 1/40 takes precedence) [6]

|  | F16F 3/093 |
· · · | the springs being of different materials, e.g. having different types of rubber [6]

|  | F16F 3/10 |
· · | combined with springs made of steel or other material having low internal friction

|  | F16F 3/12 |
· · · | the steel spring being in contact with the rubber spring, e.g. being embedded in it [6]

|  | F16F 5/00 |
Liquid springs in which the liquid works as a spring by compression, e.g. combined with throttling action; Combinations of devices including liquid springs

|  | F16F 6/00 |
Magnetic springs; Fluid magnetic springs

|  | F16F 7/00 |
Vibration-dampers; Shock-absorbers (using fluid Fulltext... Hierarchy... Expanded...F16F 5/00, Fulltext... Hierarchy... Expanded...F16F 9/00; specific for rotary systems Fulltext... Hierarchy... Expanded...F16F 15/10)

|  | F16F 7/01 |
· | using friction between loose particles, e.g. sand [6]

|  | F16F 7/02 |
· | with relatively-rotatable friction surfaces that are pressed together (Fulltext... Hierarchy... Expanded...F16F 7/01 takes precedence; one of the members being a spring Fulltext... Hierarchy... Expanded...F16F 13/02) [6]

|  | F16F 7/04 |
· · | in the direction of the axis of rotation

|  | F16F 7/06 |
· · | in a direction perpendicular or inclined to the axis of rotation

|  | F16F 7/08 |
· | with friction surfaces rectilinearly movable along each other (Fulltext... Hierarchy... Expanded...F16F 7/01 takes precedence) [6]

|  | F16F 7/09 |
· · | in dampers of the cylinder-and-piston type [6]

|  | F16F 7/10 |
· | using inertia effect

|  | F16F 7/104 |
· · | the inertia member being resiliently mounted [6]

|  | F16F 7/108 |
· · · | on plastics springs [6]

|  | F16F 7/112 |
· · · | on fluid springs [6]

|  | F16F 7/116 |
· · · | on metal springs [6]

|  | F16F 7/12 |
· | using plastic deformation of members

|  | F16F 7/14 |
· | of cable-support type, i.e. frictionally-engaged loop-forming cables

|  | F16F 9/00 |
Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium (Fulltext... Hierarchy... Expanded...F16F 5/00 takes precedence; connection of valves to inflatable elastic bodies Fulltext... Hierarchy... Expanded...B60C 29/00; door-operating appliances with fluid braking systems Fulltext... Hierarchy... Expanded...E05F)

|  | F16F 9/02 |
· | using gas only

|  | F16F 9/04 |
· · | in a chamber with a flexible wall

|  | F16F 9/05 |
· · · | the flexible wall being of the rolling diaphragm type [5]

|  | F16F 9/06 |
· | using both gas and liquid

|  | F16F 9/08 |
· · | in a chamber with a flexible wall

|  | F16F 9/084 |
· · · | comprising a gas spring contained within a flexible wall, the wall not being in contact with the damping fluid, i.e. mounted externally on the damper cylinder [6]

|  | F16F 9/088 |
· · · | comprising a gas spring with a flexible wall provided within the cylinder on the piston rod of a monotubular damper or within the inner tube of a bitubular damper [6]

|  | F16F 9/092 |
· · · | comprising a gas spring with a flexible wall provided between the tubes of a bitubular damper [6]

|  | F16F 9/096 |
· · · | comprising a hydropneumatic accumulator of the membrane type provided on the upper or the lower end of a damper or separately from or laterally on the damper [6]

|  | F16F 9/10 |
· | using liquid only; using a fluid of which the nature is immaterial

|  | F16F 9/12 |
· · | Devices with one or more rotary vanes turning in the fluid, any throttling effect being immaterial

|  | F16F 9/14 |
· · | Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect

|  | F16F 9/16 |
· · · | involving only straight-line movement of the effective parts

|  | F16F 9/18 |
· · · · | with a closed cylinder and a piston separating two or more working spaces therein

|  | F16F 9/19 |
· · · · · | with a single cylinder

|  | F16F 9/20 |
· · · · · | with the piston-rod extending through both ends of the cylinder

|  | F16F 9/22 |
· · · · | with one or more cylinders, each having a single working space closed by a piston or plunger

|  | F16F 9/24 |
· · · · · | with a single cylinder and a single piston or plunger

|  | F16F 9/26 |
· · · · · | with two cylinders in line and with the two pistons or plungers connected together

|  | F16F 9/28 |
· · · · · | with two parallel cylinders and with the two pistons or plungers connected together

|  | F16F 9/30 |
· | with solid or semi-solid material, e.g. pasty masses, as damping medium

|  | F16F 9/32 |
· | Details

|  | F16F 9/34 |
· · | Special valve constructions (valves in general Fulltext... Hierarchy... Expanded...F16K); Shape or construction of throttling passages

|  | F16F 9/342 |
· · · | Throttling passages operating with metering pins

|  | F16F 9/344 |
· · · | Vortex flow passages [6]

|  | F16F 9/346 |
· · · | Throttling passages in the form of slots arranged in cylinder walls

|  | F16F 9/348 |
· · · | Throttling passages in the form of annular discs operating in opposite directions

|  | F16F 9/36 |
· · | Special sealings, including sealings or guides for piston-rods (sealing of moving parts in general Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F16J 15/16-F16J 15/56)

|  | F16F 9/38 |
· · | Covers for protection or appearance

|  | F16F 9/40 |
· · | Arrangements for preventing froth

|  | F16F 9/42 |
· · | Cooling arrangements

|  | F16F 9/43 |
· · | Filling arrangements, e.g. for supply of gas

|  | F16F 9/44 |
· · | Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction (Fulltext... Hierarchy... Expanded...F16F 9/53, Fulltext... Hierarchy... Expanded...F16F 9/56 take precedence; temperature correction only Fulltext... Hierarchy... Expanded...F16F 9/52) [5,6]

|  | F16F 9/46 |
· · · | allowing control from a distance

|  | F16F 9/48 |
· · | Arrangements for providing different damping effects at different parts of the stroke (Fulltext... Hierarchy... Expanded...F16F 9/53, Fulltext... Hierarchy... Expanded...F16F 9/56 take precedence) [5,6]

|  | F16F 9/49 |
· · · | Stops limiting fluid passage, e.g. hydraulic stops

|  | F16F 9/50 |
· · | Special means providing automatic damping adjustment (Fulltext... Hierarchy... Expanded...F16F 9/53, Fulltext... Hierarchy... Expanded...F16F 9/56 take precedence) [5,6]

|  | F16F 9/504 |
· · · | Inertia-sensitive means [6]

|  | F16F 9/508 |
· · · | Means responsive to the velocity of movement of the piston [6]

|  | F16F 9/512 |
· · · | Means responsive to load action on the damper or fluid pressure in the damper [6]

|  | F16F 9/516 |
· · · | resulting in the damping effects during contraction being different from the damping effects during extension [6]

|  | F16F 9/52 |
· · · | in case of change of temperature (combined with external adjustment Fulltext... Hierarchy... Expanded...F16F 9/44)

|  | F16F 9/53 |
· · | Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically [5]

|  | F16F 9/54 |
· · | Arrangements for attachment

|  | F16F 9/56 |
· · | Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke [6]

|  | F16F 9/58 |
· · | Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder (Fulltext... Hierarchy... Expanded...F16F 9/49 takes precedence) [6]

|  | F16F 11/00 |
Vibration-dampers or shock-absorbers working with both friction and a damping fluid

|  | F16F 13/00 |
Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs (Fulltext... Hierarchy... Expanded...F16F 5/00 takes precedence)

|  | F16F 13/02 |
· | damping by frictional contact between the spring and braking means (frictionally coacting wound springs Fulltext... Hierarchy... Expanded...F16F 3/06)

|  | F16F 13/04 |
· | comprising both a plastics spring and a damper, e.g. a friction damper [6]

|  | F16F 13/06 |
· · | the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper (Fulltext... Hierarchy... Expanded...F16F 13/26 takes precedence) [6]

|  | F16F 13/08 |
· · · | the plastics spring forming at least a part of the wall of the fluid chamber of the damper (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F16F 13/20-F16F 13/24 take precedence) [6]

|  | F16F 13/10 |
· · · · | the wall being at least in part formed by a flexible membrane or the like (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F16F 13/12-F16F 13/18 take precedence) [6]

|  | F16F 13/12 |
· · · · | Single chamber dampers (Fulltext... Hierarchy... Expanded...F16F 13/14 takes precedence) [6]

|  | F16F 13/14 |
· · · · | Units of the bushing type [6]

|  | F16F 13/16 |
· · · · · | specially adapted for receiving axial loads [6]

|  | F16F 13/18 |
· · · · | characterised by the location or the shape of the equilibration chamber, e.g. the equilibration chamber surrounding the plastics spring or being annular (Fulltext... Hierarchy... Expanded...F16F 13/14 takes precedence) [6]

|  | F16F 13/20 |
· · · | characterised by comprising also a pneumatic spring (Fulltext... Hierarchy... Expanded...F16F 13/22 takes precedence) [6]

|  | F16F 13/22 |
· · · | characterised by comprising also a dynamic damper (dampers using inertia effect per se Fulltext... Hierarchy... Expanded...F16F 7/10) [6]

|  | F16F 13/24 |
· · · | the central part of the unit being supported by one element and both extremities of the unit being supported by a single other element, i.e. double acting mounting [6]

|  | F16F 13/26 |
· · | characterised by adjusting or regulating devices responsive to exterior conditions [6]

|  | F16F 13/28 |
· · · | specially adapted for units of the bushing type (Fulltext... Hierarchy... Expanded...F16F 13/30 takes precedence) [6]

|  | F16F 13/30 |
· · · | comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids [6]

|  | F16F 15/00 - F16F 15/00 |
Note(s) In this group, it is desirable to add the indexing codes of groups Fulltext... Hierarchy... Expanded...F16F 101/00 or Fulltext... Hierarchy... Expanded...F16F 103/00. The indexing codes should be unlinked. [6]

|  | F16F 15/00 |
Suppression of vibrations in systems (vehicle seat suspension devices Fulltext... Hierarchy... Expanded...B60N 2/50); Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion (testing static or dynamic balance of machines or structures Fulltext... Hierarchy... Expanded...G01M 1/00)

|  | F16F 15/02 |
· | Suppression of vibrations of non-rotating, e.g. reciprocating, systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating system (layered products Fulltext... Hierarchy... Expanded...B32B; suppression of vibration in ships Fulltext... Hierarchy... Expanded...B63)

|  | F16F 15/023 |
· · | using fluid means [6]

|  | F16F 15/027 |
· · · | comprising control arrangements [6]

|  | F16F 15/03 |
· · | using electromagnetic means (Fulltext... Hierarchy... Expanded...F16F 9/53 takes precedence) [5]

|  | F16F 15/04 |
· · | using elastic means (single elements or their attachment Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F16F 1/00-F16F 13/00) [2]

|  | F16F 15/06 |
· · · | with metal springs (with rubber springs also Fulltext... Hierarchy... Expanded...F16F 15/08)

|  | F16F 15/067 |
· · · · | using only wound springs [6]

|  | F16F 15/073 |
· · · · | using only leaf springs [6]

|  | F16F 15/08 |
· · · | with rubber springs

|  | F16F 15/10 |
· | Suppression of vibrations in rotating systems by making use of members moving with the system (by balancing Fulltext... Hierarchy... Expanded...F16F 15/22; with flywheels acting variably or intermittently Fulltext... Hierarchy... Expanded...F16H)

|  | F16F 15/12 |
· · | using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon (Fulltext... Hierarchy... Expanded...F16F 15/16 takes precedence) [6]

|  | F16F 15/121 |
· · · | using springs as elastic members, e.g. metallic springs (Fulltext... Hierarchy... Expanded...F16F 15/131 takes precedence) [6]

|  | F16F 15/123 |
· · · · | Wound springs [6]

|  | F16F 15/124 |
· · · · | Plastics springs, e.g. made of rubber (Fulltext... Hierarchy... Expanded...F16F 15/123 takes precedence) [6]

|  | F16F 15/126 |
· · · · · | consisting of at least one annular element surrounding the axis of rotation [6]

|  | F16F 15/127 |
· · · · | using plastics springs combined with other types of springs [6]

|  | F16F 15/129 |
· · · | characterised by friction-damping means (Fulltext... Hierarchy... Expanded...F16F 15/131 takes precedence) [6]

|  | F16F 15/131 |
· · · | the rotating system comprising two or more gyratory masses [6]

|  | F16F 15/133 |
· · · · | using springs as elastic members, e.g. metallic springs [6]

|  | F16F 15/134 |
· · · · · | Wound springs [6]

|  | F16F 15/136 |
· · · · · | Plastics springs, e.g. made of rubber (Fulltext... Hierarchy... Expanded...F16F 15/134 takes precedence) [6]

|  | F16F 15/137 |
· · · · · | the elastic members consisting of two or more springs of different types [6]

|  | F16F 15/139 |
· · · · | characterised by friction-damping means [6]

|  | F16F 15/14 |
· · | using freely-swinging masses rotating with the system

|  | F16F 15/16 |
· · | using a fluid (devices connecting input and output members Fulltext... Hierarchy... Expanded...F16D)

|  | F16F 15/167 |
· · · | having an inertia member, e.g. ring [6]

|  | F16F 15/173 |
· · · · | provided within a closed housing [6]

|  | F16F 15/18 |
· · | using electric means (dynamo-electric devices Fulltext... Hierarchy... Expanded...H02K)

|  | F16F 15/20 |
· | Suppression of vibrations of rotating systems by favourable grouping or relative arrangement of the moving members of the system or systems

|  | F16F 15/22 |
· | Compensation of inertia forces

|  | F16F 15/24 |
· · | of crankshaft systems by particular disposition of cranks, pistons, or the like

|  | F16F 15/26 |
· · | of crankshaft systems using solid masses, other than the ordinary pistons, moving with the system

|  | F16F 15/28 |
· | Counterweights; Attaching or mounting same (for roll-type closures Fulltext... Hierarchy... Expanded...E06B 9/62)

|  | F16F 15/30 |
· | Flywheels (Fulltext... Hierarchy... Expanded...F16F 15/16 takes precedence; suppression of vibrations in rotating systems using elastic members or friction-damping members moving with the system Fulltext... Hierarchy... Expanded...F16F 15/12; rotary-body aspects in general Fulltext... Hierarchy... Expanded...F16C 13/00, Fulltext... Hierarchy... Expanded...F16C 15/00) [6]

|  | F16F 15/305 |
· · | made of plastics, e.g. fibre reinforced plastics (FRP) [6]

|  | F16F 15/31 |
· · | characterised by means for varying the moment of inertia [6]

|  | F16F 15/315 |
· · | characterised by their supporting arrangement, e.g. mountings, cages, securing inertia member to shaft (Fulltext... Hierarchy... Expanded...F16F 15/31 takes precedence) [6]

|  | F16F 15/32 |
· | Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels [2,5]

|  | F16F 15/34 |
· · | Fastening arrangements therefor [5]

|  | F16F 15/36 |
· · | operating automatically [5]

|  | F16F 101/00 - F16F 103/00 |
Indexing scheme associated with group Fulltext... Hierarchy... Expanded...F16F 15/00, relating to the arrangement of two or more gyratory masses. The indexing codes should be unlinked. [6]

|  | F16F 101/00 - F16F 103/00 |
Note(s) Attention is drawn to Chapter IV of the Guide which sets forth the rules concerning the application and presentation of the different types of indexing code. [6]

|  | F16F 101/00 |
Serial arrangement of gyratory masses [6]

|  | F16F 103/00 |
Parallel arrangement of gyratory masses [6]