US Patent: 2,295,161
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| Hydraulic Control Mechanism
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Patentee:
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| Harry C. Clay (exact or similar names) - Columbus, Bartholomew County, IN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 07, 1939 |
| Granted: |
Sep. 08, 1942 |
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Joel Havens
"Vintage Machinery" entry for Reeves Pulley Co.
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Description: |
| Abstract:
The primary object of the invention is to provide a hydraulic control mechanism for shifting a movable element, said mechanism comprising a constantly driven rotary pump for supplying fluid under pressure to a fluid motor which, in turn, upon actuation of a valve, will operate to shift the movable controlled member to a degree and in a direction dependent upon the degree and direction of movement of the valve. A feature of the invention is the provision of conduit means connecting the pump with the motor and with a fluid reservoir in such a manner that, upon operation of the pump in one direction, a single flow path from the reservoir through the pump to the motor will be established, while, upon operation of the pump in the opposite direction, a different single flow path will be established from the reservoir, through the pump, and to the motor. While the control mechanism is illustrated in association with a particular type of variable speed transmission, it will be recognized that the control mechanism is applicable to other types of variable speed transmissions, and to the control of different mechanisms, in which a desired end is attained by positive movement of a controlled member in one direction or the other.
Claim:
In combination, a variable speed transmission comprising a casing, a driving shaft rotatably positioned in said casing, an expansible V-pulley on said driving shalt and comprising two oppositely facing coned discs, at least one of said discs being axially shiftable, a driven shaft rotatably positioned in said casing, an expansible V-pulley on said driven shaft and comprising two oppositely facing coned discs, at least one of said discs being axially movable, a V-belt providing a driving connection between said V-pulleys, said casing being provided with an aperture in its wall adjacent one of said shiftable discs and means for shifting said one disc, comprising a housing, a fluid pump in said housing, and a fluid motor in said housing, said housing being formed with an aperture in one wall and being secured to said casing with said housing aperture in registry with said casing aperture, said motor comprising a cylinder operatively connected to said one disc, and a piston in said cylinder and fixed with respect to said housing, and means for controlling fluid flow from said pump to and from opposite ends of said cylinder. |
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