Expansible chamber devices – Rotating cylinder – Plural cylinders
Patent
1975-01-23
1976-08-24
Schwadron, Martin P.
Expansible chamber devices
Rotating cylinder
Plural cylinders
91499, 92 71, 92147, F01B 1304
Patent
active
039759903
ABSTRACT:
A skid-steered vehicle, especially an end loader, having a hydrostatic transmission. The transmission will have a series pump unit comprising two pump sections separated by a midplane porting block. Each pump section includes an axial piston group rotating on a common axis on opposite sides of the block. A pair of arcuate ports in each side of the block circumjacent the axis of rotation are in fluid communication with each piston group. Internal passages within the block include at least one passage communicating with one arcuate port of each pair which crosses from one side of the axis of rotation to the other before reaching an exposed surface of the block. In this manner, the external crossing of hydraulic hoses is eliminated facilitating shorter, more direct hydraulic coupling with associated hydraulic components.
REFERENCES:
patent: 960063 (1910-05-01), Beckmann
patent: 1287026 (1918-12-01), Janney
patent: 2662375 (1953-12-01), Postel
patent: 3036434 (1962-05-01), Mark
patent: 3157995 (1964-11-01), Swift
patent: 3177666 (1965-04-01), Reinke
patent: 3213619 (1965-10-01), Creighton
patent: 3596568 (1971-08-01), Wittren
patent: 3631763 (1972-01-01), Court
Clark Equipment Company
Hershkovitz Abraham
Schwadron Martin P.
Thibault Harry G.
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