Seal structure for a rotating cam pressurized fluid device
Patent 5176511 Issued on January 5, 1993. Estimated Expiration Date: 
November 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 20, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 444901 Hydrostatic actuator Multiple cylinder-capacity pressurized fluid (motor or pump) mechanism Radial piston engine Patent #: 5090295 InventorAssigneeApplicationNo. 795040 filed on 11/20/1991US Classes:418/104, WITH MECHANICAL SEALING91/498, Cooperating valve ports in cylinder and relatively movable central member417/462Unidirectionally rotating cylinderExaminersPrimary: Bertsch, Richard A.Assistant: Jalali, Laleh Foreign Patent References
International ClassesF01B 001/06F03C 001/24 Foreign Application Priority Data1990-11-23 FRAbstractA mechanism is disclosed, comprising: a cylinder-block; a cam; an internal fluid distributor slide valve presenting a recess whose shape is complementary of a central core; grooves made between internal distributor valve and central core; and seal elements disposed on either side of each groove. According to the invention, each seal element comprises a ring-type joint made of a plastics material, the maximum value of the pressures in the grooves being equal to 450 bars and that of the speed of rotation of the internal fluid distributor valve with respect to the central core, being equal to 200 rpm. One application of the invention is the production of a motor having a satisfactory volumetric efficiency. | |
