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

ENGINEERING IN GENERAL

|  | F15 |
FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL

|  | F15B |
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR (motors, turbines, compressors, blowers, pumps Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04; fluid dynamics Fulltext... Hierarchy... Expanded...F15D; fluid clutches or brakes Fulltext... Hierarchy... Expanded...F16D; fluid springs Fulltext... Hierarchy... Expanded...F16F; fluid gearing Fulltext... Hierarchy... Expanded...F16H; pistons, cylinders, packing Fulltext... Hierarchy... Expanded...F16J; valves, taps, cocks, actuating-floats Fulltext... Hierarchy... Expanded...F16K; safety valves with auxiliary fluid operation of the main valve Fulltext... Hierarchy... Expanded...F16K 17/10; fluid-operating means for valves Fulltext... Hierarchy... Expanded...F16K 31/12; pipes, pipe joints Fulltext... Hierarchy... Expanded...F16L; lubricating Fulltext... Hierarchy... Expanded...F16N)

|  | F15B |
Note(s) In this sub-class, the following terms are used with the meanings indicated: "Telemotor" means a system or device in which a substantially constant amount of fluid is trapped between an input member and an output member to act as a fluid link. "Servomotor" means a fluid-pressure actuator, e.g. a piston and cylinder, directly controlled by a valve or other device which is responsive to operation of an initial controlling member; "Servomotor" does not cover a telemotor. The initial controlling member may be adjacent to the servomotor or at a distance, and may be, for example, a hand lever.

|  | F15B 1/00 |
Installations for supplying fluid under pressure; Sumps

|  | F15B 1/02 |
· | Accumulator installations

|  | F15B 1/04 |
· · | Accumulators

|  | F15B 1/047 |
· · · | using a gas cushion, e.g. with flexible separating means between liquid and gas [3]

|  | F15B 1/053 |
· · · · | with rigid separating means, e.g. pistons [3]

|  | F15B 1/06 |
· | Supply reservoir or sump assemblies

|  | F15B 3/00 |
Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids

|  | F15B 5/00 |
Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice-versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities (Fulltext... Hierarchy... Expanded...F15B 9/00 takes precedence; for measuring or controlling Fulltext... Hierarchy... Expanded...G01, Fulltext... Hierarchy... Expanded...G05)

|  | F15B 7/00 - F15B 21/00 |
Fluid-pressure actuator systems (distribution devices Fulltext... Hierarchy... Expanded...F15B 13/02; systems peculiar to the control of a particular machine or apparatus covered in a single other class, see the class for such machine or apparatus)

|  | F15B 7/00 - F15B 21/00 |
Note(s) This heading relates to moving members into one or more definite positions by means of fluid pressure. Pump, motor, and control features so far as not peculiar to this purpose are classified in the relevant classes.

|  | F15B 7/00 |
Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors

|  | F15B 7/02 |
· | Systems with continuously-operating input and output apparatus

|  | F15B 7/04 |
· | in which the ratio between pump stroke and motor stroke varies with the resistance against the motor (in brake-actuating systems for motor vehicles Fulltext... Hierarchy... Expanded...B60T)

|  | F15B 7/06 |
· | Details (Fulltext... Hierarchy... Expanded...F15B 15/00 takes precedence)

|  | F15B 7/08 |
· · | Input units; Master units

|  | F15B 7/10 |
· · | Compensation of the liquid content in a system (Fulltext... Hierarchy... Expanded...F15B 7/08 takes precedence)

|  | F15B 9/00 |
Servomotors with follow-up action, i.e. in which the position of the actuated member conforms with that of the controlling member

|  | F15B 9/02 |
· | with servomotors of the reciprocatable or oscillatable type

|  | F15B 9/03 |
· · | with electrical control means

|  | F15B 9/04 |
· · | controlled by varying the output of a pump with variable capacity

|  | F15B 9/06 |
· · | controlled by means using a fluid jet

|  | F15B 9/07 |
· · · | with electrical control means

|  | F15B 9/08 |
· · | controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (Fulltext... Hierarchy... Expanded...F15B 9/06 takes precedence)

|  | F15B 9/09 |
· · · | with electrical control means

|  | F15B 9/10 |
· · · | in which the controlling element and the servomotor each controls a separate member, these members influencing different fluid passages or the same passage

|  | F15B 9/12 |
· · · | in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing

|  | F15B 9/14 |
· | with rotary servomotors

|  | F15B 9/16 |
· | Systems essentially having two or more interacting servomotors

|  | F15B 9/17 |
· · | with electrical control means

|  | F15B 11/00 |
Servomotor systems without provision for follow-up action (Fulltext... Hierarchy... Expanded...F15B 3/00 takes precedence)

|  | F15B 11/02 |
· | Systems essentially incorporating special features for controlling the speed or actuating force of an output member

|  | F15B 11/04 |
· · | for controlling the speed

|  | F15B 11/05 |
· · · | specially adapted to maintain constant speed

|  | F15B 11/06 |
· | involving features specific to the use of a compressible medium, e.g. air, steam

|  | F15B 11/08 |
· | with only one servomotor

|  | F15B 11/10 |
· · | in which the servomotor position is a function of the pressure

|  | F15B 11/12 |
· · | providing distinct intermediate positions; with step-by-step action

|  | F15B 11/14 |
· · | without special provision for intermediate position

|  | F15B 11/15 |
· · | with special provision for automatic return

|  | F15B 11/16 |
· | with two or more servomotors

|  | F15B 11/18 |
· · | used in combination for obtaining stepwise operation of a single controlled member

|  | F15B 11/20 |
· · | controlling several interacting or sequentially-operating members

|  | F15B 11/22 |
· · | Synchronisation of the movement of two or more servomotors

|  | F15B 13/00 |
Details of servomotor systems (Fulltext... Hierarchy... Expanded...F15B 15/00 takes precedence)

|  | F15B 13/01 |
· | Locking-valves or other detent devices (associated with the actuator Fulltext... Hierarchy... Expanded...F15B 15/26)

|  | F15B 13/02 |
· | Fluid distribution or supply devices characterised by their adaptation to the control of servomotors (multiple-way valves Fulltext... Hierarchy... Expanded...F16K 11/00)

|  | F15B 13/04 |
· · | for use with a single servomotor

|  | F15B 13/042 |
· · · | operated by fluid pressure

|  | F15B 13/043 |
· · · · | with electrically-controlled pilot valves

|  | F15B 13/044 |
· · · | operated by eletrically-controlled means, e.g. solenoids, torque-motors

|  | F15B 13/06 |
· · | for use with two or more servomotors

|  | F15B 13/07 |
· · · | in distinct sequence

|  | F15B 13/08 |
· · · | Assemblies of units, each for the control of a single servomotor only

|  | F15B 13/09 |
· · | for use with two or more pumps

|  | F15B 13/10 |
· | Special arrangements for operating the actuated device without using fluid pressure, e.g. for emergency use

|  | F15B 13/12 |
· | Special measures for increasing the sensitivity of the system

|  | F15B 13/14 |
· | Special measures for giving the operating person a "feeling" of the response of the actuated device

|  | F15B 13/16 |
· | Special measures for feedback

|  | F15B 15/00 |
Fluid-actuated devices for displacing a member from one position to another (motors for continuous movement Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F03); Gearing associated therewith (gearings per se Fulltext... Hierarchy... Expanded...F16H)

|  | F15B 15/02 |
· | Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member

|  | F15B 15/04 |
· · | with oscillating cylinder

|  | F15B 15/06 |
· · | for mechanically converting rectilinear movement into non-rectilinear movement

|  | F15B 15/08 |
· | characterised by the construction of the motor unit (pistons, cylinders, packing Fulltext... Hierarchy... Expanded...F16J)

|  | F15B 15/10 |
· · | the motor being of diaphragm type (diaphragms, bellows Fulltext... Hierarchy... Expanded...F16J 3/00)

|  | F15B 15/12 |
· · | of the oscillating-vane or curved-cylinder type

|  | F15B 15/14 |
· · | of the straight-cylinder type

|  | F15B 15/16 |
· · · | of the telescopic type

|  | F15B 15/17 |
· · · | of differential-piston type

|  | F15B 15/18 |
· | Combined units comprising both motor and pump

|  | F15B 15/19 |
· | Pyrotechnical actuators [3]

|  | F15B 15/20 |
· | Other details

|  | F15B 15/22 |
· · | for accelerating or decelerating the stroke

|  | F15B 15/24 |
· · | for restricting the stroke

|  | F15B 15/26 |
· · | Locking mechanisms

|  | F15B 17/00 |
Combinations of telemotor and servomotor systems

|  | F15B 17/02 |
· | in which a telemotor operates the control member of a servomotor

|  | F15B 18/00 |
Parallel arrangements of independent servomotor systems

|  | F15B 19/00 |
Testing fluid-pressure systems or apparatus, so far as not provided for elsewhere

|  | F15B 20/00 |
Safety arrangements; Applications of safety devices (safety devices in general Fulltext... Hierarchy... Expanded...F16P); Emergency measures

|  | F15B 21/00 |
Common features; Fluid-pressure systems, or details thereof, not covered by any preceding group

|  | F15B 21/02 |
· | Servomotor systems with programme control derived from a store or timing device; Control devices therefor (programme control in general Fulltext... Hierarchy... Expanded...G05B 19/00)

|  | F15B 21/04 |
· | Special measures taken in connection with the properties of the fluid, e.g. for venting, compensating for changes of viscosity, cooling, filtering, preventing churning

|  | F15B 21/06 |
· | Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids

|  | F15B 21/08 |
· | Servomotor systems incorporating electrically- operated control means (Fulltext... Hierarchy... Expanded...F15B 21/02 takes precedence)

|  | F15B 21/10 |
· | Delay devices or arrangements (associated with fluid motors or actuators Fulltext... Hierarchy... Expanded...F15B 15/22)

|  | F15B 21/12 |
· | Fluid oscillators or pulse generators (fluid oscillators predominantly used for computing or control purposes Fulltext... Hierarchy... Expanded...F15C 1/22, Fulltext... Hierarchy... Expanded...F15C 3/16)