IPC 6 English version
 
  
F16F-F16F00958
  F16F 11/00 - F16F 103:00  

SECTION F– MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING


F 16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL


F 16 FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION


 Notes

(1)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]

(2)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.

 A 47 C 23/00 to A 47 C 27/00 Spring mattresses

 A 63 C 5/075 Vibration dampers in skis

 B 60 G Vehicle suspensions

 B 60 R 19/24 Mounting of bumpers on vehicles

 B 61 F Rail vehicle suspensions

 B 61 G 11/00 Buffers for railway or tramway vehicles

 B 62 D 21/15 Vehicle chassis frames having impact absorbing means

 B 62 J 1/02 Resiliently mounted saddles on cycles

 B 62 K 21/08 Steering dampers

 B 63 H 1/15 Marine propellers having vibration-damping means

 B 63 H 21/30 Anti-vibration mounting of marine propulsion plant in ships

 B 64 C 25/58 Arrangement of shock-absorbers or springs in aeroplane alighting gear

 B 65 D 81/02 Containers, packing elements or packages with shock-absorbing means

 D 06 F 37/20 Resilient mountings in washing machines

 D 06 F 49/06 Resilient mountings in domestic spin-dryers

 F 03 G 1/00 Spring motors

 F 21 V 15/04 Resilient mounting of lighting devices

 F 41 A 25/00 Gun cradles to permit recoil

 F 41 B 5/20 Vibration dampers for archery bows

 G 01 D 11/00 Indicating or recording in connection with measuring

 G 01 G 21/10 Weighing apparatus, e.g. arrangement of shock-absorbers in weighing apparatus

 G 04 B Clocks, watches

 G 12 B 3/08 Damping of movements in instruments

 G 21 C 7/20 Disposition of shock-absorbing devices for displacable control elements in nuclear reactors.


1/

00Springs (working with fluid F 16 F 5/00, F 16 F 9/00)

1/

02.made of steel or other material having low internal friction (F 16 F 1/36 takes precedence); Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant [6]

1/

04..Wound springs

1/

06...with turns lying in cylindrical surfaces

1/

08...with turns lying in mainly conical surfaces

1/

10...Spiral springs with turns lying substantially in plane surfaces

1/

12...Attachments or mountings

1/

13....comprising inserts or spacers between the windings for changing the mechanical or physical characteristics of the spring [6]

1/

14..Torsion springs consisting of bars or tubes

1/

16...Attachments or mountings

1/

18..Leaf springs

1/

20...with layers, e.g. anti-friction layers, or with rollers between the leaves

1/

22...with means for modifying the spring characteristic

1/

24...Lubrication; Covers, e.g. for retaining lubricant

1/

26...Attachments or mountings (B 60 G 11/10 takes precedence) [5]

1/

28....comprising cylindrical metal pins pivoted in close-fitting sleeves

1/

30....comprising intermediate pieces made of rubber or similar elastic material

1/

32..Cup springs; Dished disc springs (diaphragms F 16 J 3/00)

1/

34..Ring springs, i.e. annular bodies deformed radially due to axial load

1/

36.made of plastics, e.g. rubber; made of material having high internal friction

1/

362..made of steel wool or compressed hair [6]

1/

364..made of cork, wood or the like material [6]

1/

366..made of fibre reinforced plastics [6]

1/

368...Leaf springs [6]

1/

37..of foam-like material, e.g. sponge rubber

1/

371..characterised by inserts or auxiliary extension elements, e.g. for rigidification (F 16 F 1/366, F 16 F 1/387 take precedence) [6]

1/

373..characterised by having a particular shape [6]

1/

374...having a spherical or the like shape [6]

1/

376...having projections, studs, serrations or the like on at least one surface (F 16 F 1/387 takes precedence) [6]

1/

377...having holes or openings (F 16 F 1/387 takes precedence) [6]

1/

379..characterised by arrangements for regulating the spring temperature, e.g. by cooling [6]

1/

38..with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin

1/

387...comprising means for modifying the rigidity in particular directions [6]

1/

393...with spherical or conical sleeves [6]

1/

40..consisting of a stack of similar elements separated by non-elastic intermediate layers

1/

41...the spring consisting of generally conically arranged elements [6]

1/

42..characterised by the mode of stressing

1/

44...loaded mainly in compression

1/

46...loaded mainly in tension

1/

48...loaded mainly in torsion

1/

50...loaded mainly in shear

1/

52...loaded in combined stresses

1/

54....loaded in compression and shear


3/

00Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic (including fluid springs F 16 F 5/00, F 16 F 13/00)

3/

02.with springs made of steel or of other material having low internal friction

3/

04..composed only of wound springs

3/

06...of which some are placed around others in such a way that they damp each other by mutual friction

3/

07..combined with chambers filled with gas or liquid

3/

08.with springs made of a material having high internal friction, e.g. rubber

3/

087..Units comprising several springs made of plastics or the like material (F 16 F 1/40 takes precedence) [6]

3/

093...the springs being of different materials, e.g. having different types of rubber [6]

3/

10..combined with springs made of steel or other material having low internal friction

3/

12...the steel spring being in contact with the rubber spring, e.g. being embedded in it [6]


5/

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


6/

00Magnetic springs; Fluid magnetic springs


7/

00Vibration-dampers; Shock-absorbers (using fluid F 16 F 5/00, F 16 F 9/00; specific for rotary systems F 16 F 15/10)

7/

01.using friction between loose particles, e.g. sand [6]

7/

02.with relatively-rotatable friction surfaces that are pressed together (F 16 F 7/01 takes precedence; one of the members being a spring F 16 F 13/02) [6]

7/

04..in the direction of the axis of rotation

7/

06..in a direction perpendicular or inclined to the axis of rotation

7/

08.with friction surfaces rectilinearly movable along each other (F 16 F 7/01 takes precedence) [6]

7/

09..in dampers of the cylinder-and-piston type [6]

7/

10.using inertia effect

7/

104..the inertia member being resiliently mounted [6]

7/

108...on plastics springs [6]

7/

112...on fluid springs [6]

7/

116...on metal springs [6]

7/

12.using plastic deformation of members

7/

14.of cable-support type, i.e. frictionally-engaged loop-forming cables


9/

00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium (F 16 F 5/00 takes precedence; connection of valves to inflatable elastic bodies B 60 C 29/00; door-operating appliances with fluid braking systems E 05 F)

9/

02.using gas only

9/

04..in a chamber with a flexible wall

9/

05...the flexible wall being of the rolling diaphragm type [5]

9/

06.using both gas and liquid

9/

08..in a chamber with a flexible wall

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]

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]

9/

092...comprising a gas spring with a flexible wall provided between the tubes of a bitubular damper [6]

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]

9/

10.using liquid only; using a fluid of which the nature is immaterial

9/

12..Devices with one or more rotary vanes turning in the fluid, any throttling effect being immaterial

9/

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

9/

16...involving only straight-line movement of the effective parts

9/

18....with a closed cylinder and a piston separating two or more working spaces therein

9/

19.....with a single cylinder

9/

20.....with the piston-rod extending through both ends of the cylinder

9/

22....with one or more cylinders, each having a single working space closed by a piston or plunger

9/

24.....with a single cylinder and a single piston or plunger

9/

26.....with two cylinders in line and with the two pistons or plungers connected together

9/

28.....with two parallel cylinders and with the two pistons or plungers connected together

9/

30.with solid or semi-solid material, e.g. pasty masses, as damping medium

9/

32.Details

9/

34..Special valve constructions (valves in general F 16 K); Shape or construction of throttling passages

9/

342...Throttling passages operating with metering pins

9/

344...Vortex flow passages [6]

9/

346...Throttling passages in the form of slots arranged in cylinder walls

9/

348...Throttling passages in the form of annular discs operating in opposite directions

9/

36..Special sealings, including sealings or guides for piston-rods (sealing of moving parts in general F 16 J 15/16 to F 16 J 15/56)

9/

38..Covers for protection or appearance

9/

40..Arrangements for preventing froth

9/

42..Cooling arrangements

9/

43..Filling arrangements, e.g. for supply of gas

9/

44..Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction (F 16 F 9/53, F 16 F 9/56 take precedence; temperature correction only F 16 F 9/52) [5,6]

9/

46...allowing control from a distance

9/

48..Arrangements for providing different damping effects at different parts of the stroke (F 16 F 9/53, F 16 F 9/56 take precedence) [5,6]

9/

49...Stops limiting fluid passage, e.g. hydraulic stops

9/

50..Special means providing automatic damping adjustment (F 16 F 9/53, F 16 F 9/56 take precedence) [5,6]

9/

504...Inertia-sensitive means [6]

9/

508...Means responsive to the velocity of movement of the piston [6]

9/

512...Means responsive to load action on the damper or fluid pressure in the damper [6]

9/

516...resulting in the damping effects during contraction being different from the damping effects during extension [6]

9/

52...in case of change of temperature (combined with external adjustment F 16 F 9/44)

9/

53..Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically [5]

9/

54..Arrangements for attachment

9/

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

9/

58..Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder (F 16 F 9/49 takes precedence) [6]

   F16F 11/00 - F16F 103:00