| Patent Number |
Title Of Patent |
Date Issued |
| RE28933 |
Hydraulic torque motor |
August 17, 1976 |
| A fluid operated device in which an externally toothed rotor is rotatably disposed in a chamber and an internally toothed member is orbitally but not rotatably disposed in the chamber about the rotor. The rotor and orbital member are operative upon relative rotation to form fluid con |
| 4310143 |
Electrically controlled proportional valve |
January 12, 1982 |
| The present invention is an electrically controlled valve (10) that includes an elongated valve body (38) with an axial passageway (48) disposed along the elongation axis (44) thereof. The valve body (38) has at least one inlet passageway (52) and at least one outlet passageway (56, |
| 4253482 |
Hydraulic valve having pressure compensated demand flow |
March 3, 1981 |
| A hydraulic valve of the type having a plurality of flow directing spools and valve bodies, normally disposed in a stack, or sectional control valve assembly, with registering like passageways on adjacent valve bodies in fluid communication. An open center pilot arrangement is provided t |
| 4195551 |
Hydraulic control valve including electromagnetic detent |
April 1, 1980 |
| The disclosure is directed to an electromagnetic detent assembly for use with a manually operable hydraulic control valve to maintain the control spool in a predetermined limit position. The electromagnetic force created by the electromagnetic detent can be varied by an electronic circui |
| 4154262 |
Hydraulic control system |
May 15, 1979 |
| The disclosure is directed to a closed center, pressure compensated hydraulic system which uses a multiple section hydraulic control valve in conjunction with a variable output hydraulic pump. The hydraulic control valve has a plurality of independently operable power spools each of whic |
| 4129987 |
Hydraulic control system |
December 19, 1978 |
| The disclosure is directed to a closed center, pressure compensated hydraulic system which uses a multiple section hydraulic control valve in conjuction with a variable output hydraulic pump. The hydraulic control valve has a plurality of independently operable power spools each of which |
| 4075933 |
Hydraulic pump or motor |
February 28, 1978 |
| A fluid pressure device comprising a pump or motor having a rotating internal assembly comprising linear pistons and cylinders operated through a "swash" plate to actuate the pistons to provide output pressure. The swash plate is mounted to the drive shaft through a universal connection |
| 4025243 |
Orbital device |
May 24, 1977 |
| An orbital device in which the effective roots of the internally extending teeth on an orbital member is equal to the radial dimension of the fluid ports. This is achieved by providing grooves in the surfaces of the orbital member adjacent the roots of the teeth. The shape of the ports i |
