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:
Feb. 07, 1989
Filed:
Feb. 03, 1988
Applicant:
Inventors:
Eugene Fourie, Brooklyn, ZA;
Steven C Rumsey, Greer, SC (US);
Assignee:
American Standard Inc., Spartanburg, SC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
1881 / ; 188 718 ; 1881 / ; 1881 / ; 188198 ; 188347 ; 188 7951 ; 188351 ; 92 131 ;
Abstract
A hydraulic power unit for a hydropneumatic brake actuator having a power piston comprising a force piston formed with a bore therein and a take-up piston operative in the force piston bore for movement relative thereto during a brake application. This relative movement is controlled by a check valve device carried with the force piston to establish or interrupt fluid pressure communication between the respective pistons and establishes a positive clearance between a brake shoe and wheel tread, for example, during a subsequent brake release.