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Class Information
Number: 91/323
Name: Motors: expansible chamber type > Cyclically operable > Relatively movable distributors for opposed working chambers
Description: Apparatus in which the motor comprises opposed working chambers and separate distributors for the working chambers, said distributors being free of one another to cyclically relatively move during operation.

Sub-classes under this class:

Class Number Class Name Patents
91/324 Distributor moves about an axis 1

Patents under this class:

Patent Number Title Of Patent Date Issued
8151900 Percussion equipment driven by a pressurized incompressible fluid Apr. 10, 2012
7540230 Three-way poppet valve for work exchanger Jun. 2, 2009
6790010 Switching system for a reciprocating piston pump Sep. 14, 2004
6571680 Pneumatic shift reciprocating pneumatic motor Jun. 3, 2003
5944045 Solvent circuit Aug. 31, 1999
5024142 Cyclically operating fluid drive motor with magnetically controlled diaphragm valves Jun. 18, 1991
4788823 Valve mechanism for controlling a reciprocating engine power stroke Dec. 6, 1988
4702147 Engine with pneumatic valve actuation Oct. 27, 1987
4688468 Method of and apparatus for controlling pulse hydraulic generators Aug. 25, 1987
4651925 Rotary spray device Mar. 24, 1987
4439114 Pumping system Mar. 27, 1984
4386888 Double diaphragm operated reversing valve pump Jun. 7, 1983
4281584 Electro-hydraulic regulating drive and a fast-switching magnetic valve for use therein Aug. 4, 1981
4002103 Reciprocating apparatus with a controllable dwell time at each end of the stroke Jan. 11, 1977
3943823 Control system for double acting air motor Mar. 16, 1976

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