US Patent Class 91
MOTORS: EXPANSIBLE CHAMBER TYPE-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1  DF  WITH SIGNAL, INDICATOR OR INSPECTION MEANS
2  DF  CUTOFF OR CONTROL AFTER PREDETERMINED NUMBER OF CYCLES OR REVOLUTIONS
3  DF  JET CONTROL TYPE
4 R  DF  HYDRO-PNEUMATIC {1}
5  DF  WORKING MEMBER MOVED BY STORED MOTIVE FLUID CHARGE
6  DF  FLUID SUPPLY THROUGH DIVERSE PATHS TO SINGLE EXPANSIBLE CHAMBER {12}
34  DF  SINGLE ACTING, CHANGEABLE TO OR FROM DOUBLE ACTING
35  DF  INDEPENDENTLY OPERATED TIMER, DELAY, PATTERN OR CYCLIC CONTROL {4}
41  DF  WITH CORRELATED CONTROL OF MOTIVE FLUID AND LOCKING MEANS {4}
46  DF  WITH INTERRELATED CONTROL OF MOTIVE FLUID AND LUBRICANT
47  DF  CONSTANTLY APPLIED MOTIVE FLUID WITH CONTROLLED VENTING {4}
52  DF  CONSTANTLY OPEN THROTTLED EXHAUST WITH CONTROLLED MOTIVE FLUID SUPPLY
53  DF  ENGINE ROTATING OR STARTING TYPE
54  DF  CONVERTIBLE; OR CHANGEABLE BY DISASSEMBLY OR ASSEMBLY
55  DF  COMBINED
59  DF  TORQUE RESPONSIVE MOTIVE FLUID CONTROL
61  DF  ROTARY AND RECIPROCATING WORKING MEMBERS
151  DF  SERIALLY FORMED EXPANDING WORKING CHAMBERS (E.G., ENDLESS)
152  DF  MULTIPLE EXPANSION {7}
165  DF  APPLICATION OF MOTIVE FLUID AT DIFFERENT PRESSURES TO OPPOSED WORKING MEMBER FACES {1}
167 R  DF  EXTENSION OF UNIT HAVING SEPARATELY CONTROLLED WORKING CHAMBERS EQUALS SUM OF INDIVIDUAL CHAMBER EXTENSIONS {2}
472  DF  THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS {10}
169  DF  SINGLE CHAMBER FORMED BY MUTUALLY RELATIVELY MOVABLE CYLINDER, SLEEVE AND PISTON
170 R  DF  RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER {12}
196  DF  MOVING CYLINDER {4}
218  DF  CYCLICALLY OPERABLE {34}
355  DF  CUTOFF AFTER SINGLE COMPLETE CYCLE {1}
357  DF  SELECTIVELY USABLE OR POSITIONABLE WORKING MEMBER CONTROLLED VENT IN CHAMBER WALL (402)
358 R  DF  WORKING MEMBER POSITION FEEDBACK TO MOTIVE FLUID CONTROL {12}
390  DF  POSITION MAINTAINING TYPE
391 R  DF  WITH ALTERNATIVE MANUAL ACTUATION OF LOAD {1}
392  DF  WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL {9}
508  DF  PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS {11}
415  DF  DIFFERENTIAL {2}
418  DF  WITH MOTIVE FLUID VALVE {32}
471  DF  MISCELLANEOUS (E.G., METHODS)
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DIGESTS
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DIG 1  DF  Digital
DIG 2  DF  Exhaust throttled motor control
DIG 3  DF  Large area valve
DIG 4  DF  Magnets