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. 18, 1976
Filed:
Dec. 09, 1974
Applicant:
Inventor:
Allyn J Hein, Joliet, IL (US);
Assignee:
Caterpillar Tractor Co., Peoria, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
F01B / ;
U.S. Cl.
CPC ...
91-65 ; 91487 ;
Abstract
In order to reduce noise and erosion within a hydrostatic translating unit having a reversible mode of operation, preferably a pump, of the type having a cylinder barrel defining a plurality of piston bores with the cylinder barrel being rotatable relative to a cylinder head for periodically communicating the piston bores with first and second pressure ports or passages, a restrictive orifice and shuttle valve are arranged in parallel communication between each pressure port and an intermediate port positioned for communication with each cylinder bore prior to communication of the cylinder bore with the respective pressure port.