Axial piston pumps and motors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 17, 1988
Grant Date -
N/A
app pub date -
Aug 28, 1986
filing date -
Aug 28, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An axial piston pump is disclosed which includes a housing, a cylindrical bore in the housing, a piston barrel rotatable in the bore and spaced from the bore walls and an antifriction bearing structure surrounding the barrel between the barrel and the bore. A plurality of axial piston are provided in the barrel which are open at one end and have fluid passages through the barrel at the other end. A piston is provided in each such piston bore which extends out of the open end. A spring is provided between each piston and the other end of the piston bore. A fixed ramp swash plate is provided in the housing bore beneath the extending pistons and an antifriction thrust bearing is provided between the swash plate and pistons. An axial drive shaft is provided on the barrel which extends through an antifriction bearing in an opening in the housing opposite the bore for drivingly engaging on external drive structure. Additionally, a removable port cap is provided on the housing over the bore which has inlet and outlet ports communicating with fluid passages in the barrel.
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