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. 16, 1988
Filed:
Apr. 03, 1987
Applicant:
Inventor:
Alfred Yardley, West Midlands, GB;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T / ; B60T / ; F16K / ;
U.S. Cl.
CPC ...
303115 ; 137508 ; 303116 ;
Abstract
In an hydraulic anti-skid braking system of the pump and de-boost type operation of the pump is initiated by an operating piston co-operating with the plunger of the pump. There is a danger that fluid trapped in a chamber between adjacent ends of the piston and the plunger by a one-way valve of the pump may cause the pump to operate accidentally. This is prevented by adapting the one-way valve to act as a pressure relief valve and establish a return path from the chamber to a reservoir when the plunger has moved relatively away from the piston through a predetermined distance insufficient for the plunger to co-operate with a drive mechanism.