Patent ID: 6854570
Filing Date: 2005-02-15
Classification: B60T,B61H

Abstract:
1. A brake cylinder parking brake for a rail vehicle brake system, said rail vehicle brake system having a brake cylinder with a push rod connected to brake rigging wherein pressurization of said brake cylinder moves said push rod in a first direction to cause said brake rigging to apply brakes on said rail vehicle, said brake cylinder having a first chamber which is pressurized to move said push rod to apply said brakes, and a second non-pressurized chamber, said brake cylinder parking brake comprising: a. a locking member disposed within said second chamber of said brake cylinder; b. said push rod movable in said first direction responsive to pressurization of said first chamber; c. said locking member engaged with said push rod during movement of said push rod in said first direction responsive to said pressurization of said first chamber; d. said locking member permitting movement of said push rod in said first direction to apply said brakes; and e. said locking member blocking movement of said push rod in a second direction to release said brakes subsequent to movement in said first direction; f. a plurality of notches extending axially along a portion of said push rod; and g. said locking member comprising a ratcheting mechanism cooperable with said plurality of notches, said ratcheting mechanism permitting said push rod to move in said first direction, and said ratcheting mechanism blocking said push rod from subsequent movement in said second direction such that said brakes are prevented from releasing.