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:
Jan. 16, 1990
Filed:
Nov. 15, 1988
Applicant:
Inventors:
Ryota Ohashi, Kobe, JP;
Masahisa Kawamura, Amagasaki, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74687 ; 60490 ; 60487 ;
Abstract
An HST type axle driving apparatus integrally assembling a hydraulic pump and a hydraulic motor at an HST type driving speed changing unit, in which a transmission casing, a pump casing and a motor casing are formed of soft metal material, such as aluminum cast, whereby mechanically processed portions are eliminated as much as possible and the manufacturing cost is reduced. A wall of the transmission casing that journals a motor shaft and a pump shaft, through which oil passages are perforated, is formed of hard metal material, such as cast iron. The parts of hard metal material are assembled by being enclosed by the casing of soft metal material.