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:
May. 29, 2001
Filed:
Jun. 29, 1999
Applicant:
Inventor:
Josef Beck, Haigerloch, DE;
Assignee:
Brueninghaus Hydromatik GmbH, Elchingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01B 3/110 ;
U.S. Cl.
CPC ...
F01B 3/110 ;
Abstract
The invention relates to a piston for a hydrostatic machine and a corresponding production method. In a conventional production method of this type, the piston is shaped from a blank into a shank section and a ball and socket joint section connected to the shank section by means of a neck section. According to the inventive embodiment, an additional blank for an inner tube is inserted into the blank of the outer tube before the latter is shaped. A hollow piston comprising one or more hollow chambers between the inner and outer tubes is formed after both blanks have been shaped.