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:
Apr. 07, 1992
Filed:
Jun. 06, 1991
Alfred C Vennemeyer, Englewood, OH (US);
Thomas H Gardner, Englewood, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An anti-lock braking system (ABS) and traction control (TC) integration is provided including an actuator with fluid connections with a master cylinder, reservoir, and a wheel cylinder. A primary piston with an interior bore and a radial bore for selective alignment with the actuator fluid connections is slidably mounted in the actuator. A normally closed solenoid valve connects the reservoir with the actuator. A sensor determines wheel speed and generates a signal. The primary piston is moved along an actuator bore in response to the signal. The actuator also has a bore axial stop. A secondary piston is slidably mounted within the primary piston. The secondary piston has land surfaces forming a sealed chamber within the primary piston and a head section sealably mounted within the actuator bore exposed to the actuator connection with the wheel cylinder. The piston has an interior passage connecting the actuator connection with the wheel cylinder with the secondary piston sealed chamber.