Power plants – Pressure fluid source and motor – Input pump and rotary output motor system having...
Patent
1981-12-04
1985-01-15
Richter, Sheldon J.
Power plants
Pressure fluid source and motor
Input pump and rotary output motor system having...
60490, 60491, 60492, 92 122, 417222, 91504, F16D 3900
Patent
active
044931891
ABSTRACT:
An axial piston-type transmission in which a group of axially displaced pump pistons, that move in a cylinder block rotated by an input shaft, slidably engage one surface of a swash plate that rotates an output shaft. A group of axially displaced motor pistons, that move in a stationary cylinder block, slidably engage an opposite surface of the swash plate so that the plate is squeezed between the two groups of pistons. The swash plate is pivotally attached to the output shaft so that the angles between the two surfaces and the axis of rotation of the swash plate can be adjusted. The pump pistons and motor pistons are hydraulically connected in pairs. A rotary valve driven by the output shaft connects half the pump cylinders together hydraulically to form an output port and the other half together to form an input port. Relative rotation between the swash plate and the pump cylinder block causes the rotary valve to continuously switch each pump cylinder in sequence from the input port to the output port and from the output port back to the input port.
REFERENCES:
patent: 1840868 (1932-01-01), Rayburn
patent: 2192539 (1940-03-01), Condon
patent: 2770099 (1956-11-01), Badalini
patent: 2874533 (1959-02-01), Schott
patent: 3204411 (1965-09-01), Stockton
patent: 3442180 (1969-05-01), Olderaan
patent: 3504492 (1970-04-01), Neukirch
patent: 3601981 (1971-08-01), Ifield
patent: 3740954 (1973-06-01), Young
Richter Sheldon J.
Smith Randolph A.
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