×

Air brake pilot adaptor

  • US 5,390,988 A
  • Filed: 02/02/1993
  • Issued: 02/21/1995
  • Est. Priority Date: 02/02/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. In combination with a pneumatic control valve used in a car in tandem with the locomotive of a train to effect applying and releasing of a pneumatic brake of the car in response to variation, from the locomotive, of gas pressure in a brake pipe extending the length of the train, wherein applying of the brake involves normally venting of gas, previously provided to a first chamber defined on one side by a first face of a service diaphragm piston, a second chamber defined on one side by a first face of an accelerated release diaphragm piston, and a passage interconnecting the first and second chambers, from the first and second chambers and the interconnecting passage through a quick service volume choke;

  • apparatus for expediting venting of the gas from the first and second chambers and the interconnecting passage to substantially immediately effect applying of the brake, comprising;

    (a) a valving member having a first passage formed therein, said first passage formed in said valving member being operatively connected to one of the pneumatic control valve passage interconnecting the first and second chambers and the first and second chambers, so as to be in fluid communication therewith, and a first port affording exhaust egress from said first passage formed in said valving member;

    (b) a first valve element mounted in said valving member for movement between a first position occluding said first port, and a second position wherein gas in said first passage formed in said valving member is exhausted through said first port; and

    (c) control means, segregated from gas pressure in the brake pipe, for accomplishing movement of said first valve element between said first and second positions thereof.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×