Swashplate type axial-piston pump

Details Swashplate type axial-piston pump Swashplate type axial-piston pump

1985-06-18

1986-10-07

Freeh, William L.

Motors: expansible chamber type

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

Cylinders parallel to rotation axis

91487, 91505, F01B 1304

Patent

active

046152571

ABSTRACT:
An axial-piston pump includes a rotatable cylinder barrel having pistons extending from cylinder bores formed at one end thereof. A swashplate is positioned adjacent the cylinder barrel and includes an inclined surface for engaging and reciprocating the pistons upon rotation of the cylinder barrel relative thereto. The cylinder barrel is rotatably supported by a bearing spaced from the swashplate in a direction toward the cylinder barrel. The location and orientation of the bearing results in the development of bearing forces which operate on the same equivalent force point as the contact forces developed between the pistons and swashplate. Since the forces thus developed all operate on the same equivalent force point, pitching or cocking moments on the cylinder barrel are substantially eliminated.

REFERENCES:
patent: 2847938 (1958-08-01), Gondek
patent: 2847984 (1958-08-01), Gallant
patent: 2925046 (1960-02-01), Budrich
patent: 3092034 (1963-06-01), Bartholomaus
patent: 3124079 (1964-03-01), Boyer
patent: 3256782 (1966-06-01), Ebert
patent: 3747476 (1973-07-01), Ankeny
patent: 3861276 (1975-01-01), Lucien

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