子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Circuit for feeding pressurised fluid by two main sources and an auxiliary source | US34713473 | 1973-04-02 | US3838573A | 1974-10-01 | LAUMOND D |
| An improved hydraulic circuit for supplying pressurized fluid to two main load elements or motors is disclosed in which a series of distributor valves are connected in a predetermined array to prevent loss of make-up fluid flow to the reservoir when one of the loads or motors is stopped.
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| 182 | Hydraulic controller for strip material feeder | US3741458D | 1971-10-14 | US3741458A | 1973-06-26 | AYLESWORTH A |
| An apparatus is described for intermittently feeding strip material to a punch press or like machine and including a reciprocal carriage member having material grippers provided thereon. The carriage member is reciprocated by way of an air or hydraulic cylinder and the stroke of the carriage cylinder is controlled by means of a counteracting hydraulic plunger cylinder connected to a closed hydraulic system.
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| 183 | Fluid isolator | US3624700D | 1969-11-24 | US3624700A | 1971-11-30 | SCHAEVE DONALD K; ASHBY EDWARD H |
| A fluid isolator for use between a high-pressure fluid line and a low-pressure fluid line for actuating one of a plurality of operators from a common source of pressure fluid. Through first and second free-floating pistons mounted in first and second cylinders, power is transferred from a primary fluid circuit to a secondary fluid circuit to actuate the operator. A valving arrangement comprising a spool-type control valve actuated by a spool-type pilot valve is operable to direct high-pressure fluid alternately to the cylinders to drive the pistons through power strokes. The pilot spool is physically attached to the first piston so that the movement of the piston shifts the pilot spool to cause the control spool to shift. To accommodate changes in the volume of the fluid, herein hydraulic fluid, in the secondary circuit, the second cylinder is larger in volume than the first cylinder. In one embodiment, the pilot valve is formed concentric with the control valve, and the pilot spool slides within a central passage in the control spool.
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| 184 | Motion conversion system | US3577732D | 1969-05-19 | US3577732A | 1971-05-04 | HAAS JACOBUS DE |
| A system for the conversion of the rotary movement of a shaft into a corresponding displacement of an element such as a moving element of a control valve.
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| 185 | Multiple detector pressure control valve | US3522817D | 1968-09-18 | US3522817A | 1970-08-04 | RAYMOND ROBERT E |
| 186 | Relief valve | US3467000D | 1966-07-21 | US3467000A | 1969-09-16 | SELTZER ROBERT E |
| 187 | Pilot unloading hydraulic circuit | US3443483D | 1966-05-06 | US3443483A | 1969-05-13 | RUHL CHARLES A L |
| 188 | Hydraulic pressure control system for clutches | US51915666 | 1966-01-06 | US3391767A | 1968-07-09 | STOW ROBIN J W C |
| 189 | Selector valve for a hydraulic circuit | US50823665 | 1965-11-17 | US3385170A | 1968-05-28 | PRICE RALPH E; GEBEL KURT M |
| 190 | Multiple speed hydraulic control system | US52489466 | 1966-02-03 | US3360925A | 1968-01-02 | ZIMMERMAN RICHARD F |
| 191 | Apparatus for hydraulic control of the transverse sealing jaws of a packaging machine | US33166463 | 1963-12-19 | US3266217A | 1966-08-16 | DEN BOS GERRIT VAN |
| 192 | Positioner | US40563864 | 1964-09-23 | US3254572A | 1966-06-07 | HAGUE ROBERT Z; LAUCKS HOWARD H; TREFF CONRAD C |
| 193 | Metal forming machine and reversible hydraulic control therefor | US78566659 | 1959-01-08 | US3016882A | 1962-01-16 | DE MARCO ROBERT F |
| 194 | Tractor loaders | US69689757 | 1957-10-17 | US2961889A | 1960-11-29 | GRANRYD THORVALD G |
| 195 | Article handling and working apparatus | US54788755 | 1955-11-07 | US2933105A | 1960-04-19 | JERMAN JOSEPH A |
| 196 | Hydraulic control apparatus | US47911254 | 1954-12-31 | US2923131A | 1960-02-02 | FURMAN FRANK J; PANISSIDI HUGO A |
| 197 | Hydraulic infeed unit | US42872754 | 1954-05-10 | US2770984A | 1956-11-20 | LOECY JR JOSEPH |
| 198 | Vehicle mounted hydraulic type power transmitting unit | US1657448 | 1948-03-23 | US2661674A | 1953-12-08 | MOTT CARL W |
| 199 | Pump | US2651648 | 1948-05-12 | US2611319A | 1952-09-23 | STREHLOW WALTER F; IGOR KAMLUKIN |
| 200 | Pump and motor hydraulic system and control valve therefor | US71779046 | 1946-12-21 | US2588588A | 1952-03-11 | SWENSON WILLIAM E; HALGREN HENRY A |
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