The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1996
Filed:
Apr. 20, 1995
Applicant:
Inventors:
Lars Martensen, S.o slashed.nderborg, DK;
Ove T Hansen, Nordborg, DK;
Assignee:
Danfoss A/S, Nordborg, DK;
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417269 ; 91436 ; 91499 ;
Abstract
A hydraulic piston machine is disclosed, having a cylinder drum and a control plate, which control plate has at least one high-pressure 'kidney' and at least one low-pressure 'kidney' and also a contact surface against which the cylinder drum bears in operation, at least the contact surface being provided with a friction-reducing layer. It is desirable for such a machine to have better operational behavior and a longer service life. For that purpose, the contact surface in the region of the low-pressure kidney has a recessed region forming a gap between the cylinder drum and the control plate.