US Patent No: 4,191,428

Number of patents in Portfolio can not be more than 2000

Air brake system with pressure holding valve

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A vehicle air brake system includes spring set air released parking brakes to which air is supplied through a pressure holding valve which maintains the air chambers of the parking brakes at a predetermined pressure even though the air brake system may be at operating pressures substantially lower than the predetermined pressure. When the air pressure in the air brake system falls below operational levels, the pressure holding valve responds to release the air from the parking brake chambers. The pressure holding valve is operative to exhaust the parking brake chambers to substantially zero pressure, and is also operative to charge the parking brake chambers any time the input pressure is above zero and exceeds the pressure in the parking brake chambers.

Loading the Abstract Image... loading....

First Claim

See full text

all claims..

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
HALDEX MIDLAND BRAKE CORPORATIONKANSAS CITY, MO39
MIDBRAKE CORPORATIONOWOSSON, MI14

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Durling, Harold Elsie, MI 3 21

Cited Art Landscape

  • No Cited Art to Display

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
AlliedSignal Truck Brake Systems Co. (1)
6,264,291 Spring brake actuator with integral biased double check valve for anti-compounding and roll-back protection 2 1999
 
GRAU LIMITED (1)
4,696,521 Vehicle anti-skid air braking systems 3 1986
 
Hose America, Inc. (1)
4,593,954 Air brake valve system 18 1984
 
NORGREN GT DEVELOPMENT CORPORATION (1)
8,480,183 Parking brake interlock 0 2007
 
Other [Check patent profile for assignment information] (2)
4,973,107 Dual pressure air brake system 3 1989
5,520,446 Emergency brake release 5 1994

Full Text

 
loading....