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:
Dec. 20, 1977
Filed:
Nov. 18, 1975
Leonard T Tribe, Ann Arbor, MI (US);
Kelsey-Hayes Company, Romulus, MI (US);
Abstract
Two embodiments of skid control systems for preventing the skidding of a wheel of a vehicle, each having a fluid pressure actuated brake and a hydraulic modulator that is operated by a vacuum motor in response to a predetermined skid signal to reduce the pressure on the wheel brake to prevent skidding. A bypass valve is incorporated for providing a direct source of actuating fluid to the wheel brake in the event of failure of the vacuum actuator to maintain the modulator in a normal braking position due to failure of the vacuum actuator. In each embodiment the hydraulic modulator includes a skid control valve movable between an open, normal braking position and a closed, skid control position in response to the predetermined skid signal. In one embodiment of the invention, the skid control valve is supported within the structure of the bypass valve to provide a compact assembly.