192 clutches and power-stop control – Clutches – Fluent material
Patent
1991-06-03
1992-08-11
Braun, Leslie A.
192 clutches and power-stop control
Clutches
Fluent material
192 60, F16D 3100
Patent
active
051371294
ABSTRACT:
Utilizing the characteristic that a hydraulic pump, such as a gear pump, having the fluid flow from its outlet restricted will tend from the increasing internal pressure to rotate with the input shaft, a variable speed transmission is designed which includes such a hydraulic pump having a rotating input shaft coincident with the input shaft of the transmission, a fluid flow regulating unit between the fluid outlet and fluid inlet of the pump, and an output shaft connected to the external housing of the pump. The fluid flow regulation unit, which includes a first fluid containing chamber connected to the pump outlet and a second fluid containing chamber connected to the pump inlet, adjustably varies fluid flow between the two chambers. A cylindrical sleeve member, having a plurality of perforations interconnecting the two fluid containing chamber, and a blocking piston slidably installed within the cylindrical sleeve permit variation between no and full fluid flow. The blocking piston, extending concentrically within an output stem of the enclosing transmission housing, is tranversely penetrated by a pin so that the pin ends extend through a pair of opposing longitudinal slots formed in the output stem. A collar fits about the output stem to engage the pin ends so that longitudinal movement of the collar adjusts the location of the blocking piston within the perforated sleeve, permitting control of pump flow and thus rotation of the output shaft.
REFERENCES:
patent: 2498801 (1950-02-01), Fraser
patent: 2708991 (1955-05-01), Carlson
patent: 3229794 (1966-01-01), Fraser
patent: 4981201 (1991-01-01), Hawkins
Braun Leslie A.
Ingman John F.
Whitelaw Nicholas
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