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Class Information
Number: 92/89
Name: Expansible chamber devices > Collapsible chamber wall portion (e.g., hinged or flexible wall)
Description: Apparatus comprising a wall portion of an expansible chamber, said wall portion being formed of flexible material or rigid members hinged or interfitted together so that the members are movable relative to each other; the flexing of the material or the relative movement of the members constituting the movement which effects the work function of the expansible chamber.

Sub-classes under this class:

Class Number Class Name Patents
92/90 Wall portion formed of flexible material 87

Patents under this class:

Patent Number Title Of Patent Date Issued
8677971 Positive displacement motor with applications including internal and external combustion Mar. 25, 2014
8439001 Actuator powered by fluid and method of forming the same May. 14, 2013
7861830 Safety device Jan. 4, 2011
7100491 Fluid-powered mechanical actuator and method for controlling Sep. 5, 2006
6901840 Angular actuator and control therefor Jun. 7, 2005
6782800 Diamond-shaped fluid powered linkage, system and engine Aug. 31, 2004
6490960 Muscle-emulating PC board actuator Dec. 10, 2002
6120264 Air pump of simple structure Sep. 19, 2000
6065289 Fluid displacement apparatus and method May. 23, 2000
5992296 Hydraulic pump Nov. 30, 1999
5860352 Actuator for generating high regulating forces and large regulating distances Jan. 19, 1999
5449003 Undulated container for undulated diaphragm and diaphragm device Sep. 12, 1995
5431089 Force generating mechanism Jul. 11, 1995
5297470 Pneumatic rotary drive Mar. 29, 1994
5230276 Fluid-driven actuator including an inflatable sac Jul. 27, 1993
5224412 Belt-driven rotary drive Jul. 6, 1993
5219393 Pressure driven rotary drive Jun. 15, 1993
5083498 Bendable actuator Jan. 28, 1992
5033270 Rotary bellows Jul. 23, 1991
4976191 Elastically deformable fluid actuator Dec. 11, 1990
4890485 Mechanism which reacts to the presence of oil and/or water Jan. 2, 1990
4867121 Piston system for use in an internal combustion engine Sep. 19, 1989
4838147 Pressure fluid actuator Jun. 13, 1989
4766802 Small-sized engine operated by fluid Aug. 30, 1988
4756237 Device for converting energy of fluid medium into mechanical work of working member Jul. 12, 1988
4539985 Aspirator and resuscitator for newborn animals Sep. 10, 1985
4509410 Variable volume fluid induction and delivery machine Apr. 9, 1985
4068675 Inflatable umbrella Jan. 17, 1978
3995535 Expansible chamber device Dec. 7, 1976
3987767 Expansible chamber device Oct. 26, 1976

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