US Patent No: 6,264,291

Number of patents in Portfolio can not be more than 2000

Spring brake actuator with integral biased double check valve for anti-compounding and roll-back protection

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Importance

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Abstract

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A double check valve is integrally located in a spring brake chamber to reduce plumbing associated with a pneumatic brake system. Anti-compounding is provided by virtue of a bias pressure of approximately twenty to thirty psi between a pressure chamber of a service actuator and an operating chamber of a parking/emergency actuator. Likewise, vehicle roll-back is addressed since the transition from a service application to a park application assures that the service brakes are sufficiently applied until the spring brake becomes operative.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALLIEDSIGNAL TRUCK BRAKE SYSTEMS CO.ELYRIA, OH45

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amato, William P Avon, OH 30 48
Eberling, Charles E - 57 170
Marsh, Andrew Elyria, OH 36 85

Cited Art Landscape

Patent Info (Count) # Cites Year
 
INDIAN HEAD INDUSTRIES, INC. (2)
5,671,654 Sealed spring brake actuator 6 1995
6,079,312 Combined valving system for spring brake actuator 3 1998
 
BENDIX COMMERCIAL VEHICLE SYSTEMS LLC (1)
5,118,165 Electro-pneumatic spring and service brake actuator 15 1991
 
GRAU LIMITED (1)
5,615,929 Brake system for a vehicle train 6 1994
 
INTERNATIONAL TRANSQUIP INDUSTRIES, INC. (1)
5,558,408 Vehicle brake system 7 1995
 
MIDBRAKE CORPORATION (1)
4,191,428 Air brake system with pressure holding valve 6 1978
 
WAGNER ELECTRIC CORPORATION (1)
4,223,953 Anti-compounding brake system and valve for hydraulic cam brake actuators 6 1978
 
Other [Check patent profile for assignment information] (2)
4,973,107 Dual pressure air brake system 3 1989
5,361,877 Diaphragm-type pneumatic brake actuator with closing valve 7 1993

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
HALDEX BRAKE CORPORATION (1)
6,907,818 System and method for providing dry filtered air to a brake actuator 4 2003
 
WABCO EUROPE BVBA (1)
8,011,483 Ventilation device for a combined spring accumulator and operating brake cylinder 0 2005