Combination solenoid valve and shuttle valve

US5299859A · kind A · utility

Assignee

• AlliedSignal, Inc. · US

Inventors

• Wendell D. Tackett · Ann Arbor, US
• Larry G. Lohraff · Berrien Springs, US
• Jay A. Hendershot · South Bend, US
• Gamil M. Rizk · South Bend, US
• Thomas A. Grana · Columbus, US
• George E. Brown · Niles, US
• Timothy J. Albert · Niles, US

Key dates

• Filing date: Nov 15, 1991
• Grant date: Apr 5, 1994
• Expiry date: Nov 15, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87217
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

The combination solenoid valve and shuttle valve (60, 160A-D, 260A-D) comprises a shuttle valve (50, 150) which is slidingly and sealingly received at or adjacent an end of the solenoid valve (40, 140). The shuttle valve (50, 150) includes a stepped interior opening (54, 154) which sealingly receives the end of the solenoid valve (40) or a valve part (140A), such that slidable movement of the shuttle valve (50) causes an insert (55, 55A, 155) within the interior opening (54, 154) to seat sealingly over either a solenoid insert seat (41C) or insert seat (141C) of the valve part (140A) in order to isolate pressure chambers (12A, 12B; 112A, 112B; 212A, 212B) of a master cylinder/hydraulic booster (12, 112, 212A, 212B) from a wheel brake (16, 116A-D, 216A-D). The shuttle valve (50, 150) may include a one way build orifice (30, 30 A, 130) which permits restricted fluid flow between a pressure source (18, 101, 201) and the wheel brake (16, 116A-D, 216A-D), a feedback orifice (36, 36A) which permits restricted fluid flow from the pressure source (18) to the master cylinder (12), a pump check valve (23, 123) which prevents fluid flow from the shuttle valve (50, 150) back toward the pressur…