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Class Information
Number: 92/12.1
Name: Expansible chamber devices > Displacement control of plural cylinders arranged in parallel, radial, or conical relationship with rotary transmission axis
Description: Apparatus comprising two or more cylinders, each cylinder being provided with a relatively reciprocating piston (includes diaphragm) to thereby form a plurality of expansible chambers, the cylinders or a transmission element in common operative engagement with said cylinders or pistons being adapted for continuous rotation about a fixed axis; said cylinders being physically arranged in a manner such that their longitudinal axes either (1) intersect at a common point or (2) extend parallel to said axis of rotation; there being provided means to selectively vary either the extent or end limits of reciprocatory movement between said cylinders and their respective relatively reciprocating pistons.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7464549 |
Polyphase hydraulic drive system |
Dec. 16, 2008 |
| 7334513 |
Axial piston machine having a fixable slide block on the swash plate |
Feb. 26, 2008 |
| 6779986 |
Radial piston pump |
Aug. 24, 2004 |
| 6619186 |
Servo controlled timing advance for unit pump or unit injector |
Sep. 16, 2003 |
| 6178869 |
Piston machine |
Jan. 30, 2001 |
| 6030185 |
Radial piston pump |
Feb. 29, 2000 |
| 6003430 |
Radial piston pump |
Dec. 21, 1999 |
| 5967018 |
Hydraulic motor with radial propulsors retained against corresponding sliding-contact surfaces by resilient means and by mechanical-retaining means located outside said propulsors |
Oct. 19, 1999 |
| 5944493 |
Radial piston fluid machine and/or adjustable rotor |
Aug. 31, 1999 |
| 5878648 |
Adjustable radial piston machine |
Mar. 9, 1999 |
| 5870942 |
Simplified housing structure for a hydrostatic machine |
Feb. 16, 1999 |
| 5676034 |
Neutral centering device for hydrostatic transmission |
Oct. 14, 1997 |
| 5634777 |
Radial piston fluid machine and/or adjustable rotor |
Jun. 3, 1997 |
| 5622052 |
Double-flow hydrostatic radial piston engine with axial flow, thrust compensation, and shaft bearing |
Apr. 22, 1997 |
| 5547348 |
Radial piston fluid machine and/or adjustable rotor |
Aug. 20, 1996 |
| 5467597 |
Hydromechanical transmission |
Nov. 21, 1995 |
| 5400594 |
Slipper guide for a hydrostatic transmission |
Mar. 28, 1995 |
| 5394787 |
Muffled hydrostatic displacement machine with radial seal |
Mar. 7, 1995 |
| 5368448 |
Variable-stroke crank mechanism |
Nov. 29, 1994 |
| 5281104 |
Sequential displacement piston pump |
Jan. 25, 1994 |
| 5279206 |
Variable displacement hydrostatic device and neutral return mechanism therefor |
Jan. 18, 1994 |
| 5273403 |
Control systems for variable displacement hydraulic pumps |
Dec. 28, 1993 |
| 5241872 |
Swashplate centering mechanism for a variable displacement pump |
Sep. 7, 1993 |
| 5241823 |
Hydraulic power system having first and second power converters |
Sep. 7, 1993 |
| 5239827 |
Hydrostatic track ring snubber |
Aug. 31, 1993 |
| 5234321 |
Variable displacement hydrostatic pump and neutral return mechanism therefor |
Aug. 10, 1993 |
| 5228290 |
Hydrodynamic variator of velocity having radial pistons |
Jul. 20, 1993 |
| 5167588 |
Hydrostatic two-way-variable-speed drive |
Dec. 1, 1992 |
| 5136931 |
Rotary type fluid energy convertor |
Aug. 11, 1992 |
| 4791858 |
Piston machine |
Dec. 20, 1988 |
| 4777866 |
Variable displacement radial piston pumps or motors |
Oct. 18, 1988 |
| 4652215 |
Variable capacity radial piston pump |
Mar. 24, 1987 |
| 4643077 |
Hydraulic radial piston machine |
Feb. 17, 1987 |
| 4634349 |
Variable displacement fluid pump |
Jan. 6, 1987 |
| 4587103 |
Device for actuating an automatic device comprising a plurality of combined mobile members |
May. 6, 1986 |
| 4548124 |
Radial piston hydraulic motor with variable eccentricity |
Oct. 22, 1985 |
| 4542660 |
Cam-type hydraulic driving device |
Sep. 24, 1985 |
| 4526032 |
Installation for measuring liquid quantities |
Jul. 2, 1985 |
| 4418586 |
Swash plate drive mechanism |
Dec. 6, 1983 |
| 4381700 |
Stepless infinite variable speed motor |
May. 3, 1983 |
| 4165677 |
Radial piston hydraulic pump or motor with stabilized pintle shaft |
Aug. 28, 1979 |
| 4077269 |
Variable displacement and/or variable compression ratio piston engine |
Mar. 7, 1978 |
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