Hollow piston for hydrostatic machines
AssigneeLinde Aktiengesellschaft
InventorWalter Heyl
Life of this patent
Estimating the term…
Abstract
A hollow piston for a hydrostatic piston machine and especially for a swash-plate-type axial-piston pump or motor, comprises a hollow outer cylinder member which is formed at one end with a ball head and at the other end with a cover. Extending centrally through this hollow piston is a central post having its opposite ends secured to or engaging the opposite ends of the outer piston member and formed with a central bore communicating between a passage in the cover and a passage in the ball head. At least one of these ends of the central post is juxtaposed with a respective end of the piston and the juxtaposed ends are formed with a conical surface and an edge engaging this surface to seal the post to the outer member.
Claims6
A hollow piston for an axial-piston machine comprising:
- a hollow cylindrical body having a working end, a reaction end, and formed with an internal space closed at said reaction end and open at said working end;
- a post extending centrally within the interior of said body and having an end part terminating at said working end, said post being formed with a central passage, said reaction end having a bore communicating with said passage in said post;
- and
- a cover secured to said body at said working end, said cover having a part juxtaposed with said end part of said post, one of said parts being provided with a conical surface and the other of said parts having an edge engaging said conical surface, said cover having a further passage communicating with said central passage.
Dependencies are inferred from the claim text.