Improvements in and relating to hydraulic pumps and motors

Details Improvements in and relating to hydraulic pumps and motors Improvements in and relating to hydraulic pumps and motors

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 1/12 (2006.01)

Patent

CA 2282424

A piston assembly for an axial displacement pump or motor comprises a piston (15) having at one end a ball shaped piston foot (16) and a slipper (41). The rear end of which defines a piston ball seat (42) in which the ball shaped piston foot (16) is received. A slipper pad (44) defines an annular, centrally located recess or pocket at the front end of the slipper (41). The slipper pad (44) comprises an annular ring (44) of polymer material.

L'invention concerne un ensemble de piston pour un moteur ou une pompe à déplacement axial. Cet ensemble comprend un piston (15) présentant, au niveau d'une extrémité, une base de piston en forme de rotule (16) et un élément à glissement (41) dont l'extrémité arrière définit un siège de rotule de piston (42) dans lequel la base du piston (16) en forme de rotule vient se loger. Un patin d'élément à glissement (44) définit un évidement ou une poche annulaire centrale, au niveau de l'extrémité avant de l'élément à glissement (41). Ce patin d'élément à glissement (44) comprend une bague annulaire (44) d'un matériau polymère.

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