Swash plate type axial piston pump

Details Swash plate type axial piston pump Swash plate type axial piston pump

1991-03-27

1992-04-21

Smith, Leonard E.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Control valve seating surface contact maintained by fluid...

91505, F01B 302

Patent

active

051057239

ABSTRACT:
A swash plate type axial piston pump having a valve plate along which a cylinder block slides. The valve plate has an intake port and a discharge port, respectively positioned on a small pitch circle. Oil passages are slanted extending from the intake port and the discharge port to a cylinder hole of the cylinder block of the piston pump, converging at an axial centerline of the cylinder block. Being different from the slanted oil passage, oil guide holes are formed extending from a bottom of the cylinder hole in parallel with a rotary shaft. Supplying pressed oil to the oil guide hole enables to decrease a pressure between the cylinder block and the valve plate.

REFERENCES:
patent: 2967491 (1961-01-01), Wiggerman
patent: 3253551 (1966-05-01), Thoma
patent: 3810715 (1974-05-01), Week et al.
patent: 4520712 (1985-06-01), Hovorka et al.

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