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:
Sep. 14, 1976
Filed:
Jun. 27, 1975
William Stelzer, Milford, MI (US);
Kelsey-Hayes Company, Romulus, MI (US);
Abstract
A load responsive proportioning valve for use on a vehicle having a source of hydraulic fluid and front and rear wheel hydraulically actuated brake systems, the assembly including proportioning valve means in one of the brake systems actuatable to modulate the brake pressure in that one system to provide for a reduced brake effect at the rear brake wheels relative to that of the front wheels to compensate for weight transfer during braking, the proportioning valve means including a piston member movable between positions opening and closing a flow path from the fluid source to the one brake system, bias means including a fluid spring providing a force to move the piston member toward one of the positions, and deceleration sensing means for controlling the magnitude of the fluid spring as a function of variations in the magnitude of deceleration of the vehicle, whereby the modulating effect of the proportioning valve means compensates for variations in loading of the vehicle.