Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Control valve seating surface contact maintained by fluid...
Patent
1988-02-01
1990-01-02
Smith, Leonard E.
Motors: expansible chamber type
Three or more cylinders arranged in parallel radial or...
Control valve seating surface contact maintained by fluid...
91486, F01B 100
Patent
active
048905399
ABSTRACT:
A control arrangement to control the flow of fluid through pumps, motors, transmissions, engines has an eccentric shoulder assembled into a respective thrust chamber in a portion of the housing to be pressed against the rotary seal face of the rotor of the device. Such arrangements are known from some of my earlier patents and have served satisfactorily, but with the desire to improve the pressures further, it has been found, that arrangements are required to prevent the control body from slight rotation, under which it otherwise would stick. The arrangement provides the means to prevent the rotation and sticking by defining a relationship between eccentricities and gravity centers in order to reduce the tendency to stick. Pins and pins with eccentric and adjustable portions are also used to prevent the tendency to stick and so are pluralities of eccentrically arranged individual thrust chambers and control body portions. A specific feature which is claimed consists in a control body for reversible flow directions of flow of fluid which control body has only two seats instead of the former three seats, while at the same time the control body is highly efficient with only small leakage and friction.
REFERENCES:
patent: 3741261 (1974-02-01), Eickmann
patent: 4723477 (1988-02-01), Eickmann
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