192 clutches and power-stop control – Clutches – Fluent material
Patent
1978-04-06
1980-03-18
Herrmann, Allan D.
192 clutches and power-stop control
Clutches
Fluent material
192103FA, F16D 3100, F16D 43284
Patent
active
041934849
ABSTRACT:
A rotary hydraulic coupling wherein the rotary motion of a fluid-filled casing is transmitted to a coaxial driven shaft through the medium of a plurality of pistons which have eccentric drive connections with the driven shaft and which work in cylinders that are radially disposed within the casing. Fluid within the casing is pumped by the pistons from a reservoir area within the casing to a manifold area while control valve mechanism variously regulates the bleeding or flow of fluid from the manifold area back to the reservoir area. The cylinders are charged with fluid from a high pressure region of the reservoir which exists by reason of centrifugal force acting through the radial depth of the fluid, such fluid entering the cylinders through intake check valves which are mechanically assisted in their opening movements to insure charging at low differential speeds. Fluid is expelled from the cylinder to the manifold through output check valves and the pressure which builds up in the manifold creates a back-up pressure in the cylinders which is translated into the application of torque to the driven shaft. The control valve mechanism which regulates bleeding of the manifold includes a control valve proper of the balanced spool type and a metering valve which regulates the operation of the control valve so that the rate of manifold bleeding may be varied within a wide range lasting from only a fraction of a second to several minutes. The valve mechanism further includes a pressure relief valve which also is of the balance spool type and which bleeds the manifold to the reservoir independently of the control valve when an overload on the driven shaft occurs.
REFERENCES:
patent: 950368 (1910-02-01), Cheyne
patent: 1173622 (1916-02-01), Tompkins
patent: 1675438 (1928-07-01), Walsh et al.
patent: 1789506 (1931-01-01), Walker
patent: 1832568 (1931-11-01), Moreland
patent: 4142617 (1979-03-01), Collier
Herrmann Allan D.
Lowndes Edward R.
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