Railway draft appliances – Couplings – Counterpart
Patent
1998-10-30
1999-12-14
Le, Mark T.
Railway draft appliances
Couplings
Counterpart
213101, 213104, 213211, B61G 300
Patent
active
060005645
ABSTRACT:
An uncoupling cam is incorporated into a hook-type coupler. Couplers of this variety are typically found on railway transit vehicles, one hook-type coupler being fixed to each end of each transit vehicle. Moving two transit vehicles toward each other so that their ends come together will eventually cause their respective hook-type couplers to couple together automatically. It is in this manner that a passenger transit train is formed with each of its vehicles being mechanically linked to an adjacent vehicle. Each hook-type coupler has a pivotally mounted hook member that can be pivoted between a latch position and an unlatch position. A biasing means inside the hook-type coupler is used to keep the hook member normally biased to the latch position. The uncoupling cam features a solid body and a roller. The body of the cam has a uniform polygonal cross-section to an edge of which the roller is rotatably secured. The roller is adapted to rollably engage a surface of the hook member. Consequently, when the uncoupling cam is activated through a partial rotation, the hook member is forcibly pivoted to the unlatch position without significant sliding frictional engagement between the uncoupling cam and the hook member.
REFERENCES:
patent: 3856154 (1974-12-01), Depenti
patent: 4080857 (1978-03-01), Roth
patent: 4336703 (1982-06-01), Thomas
patent: 4366911 (1983-01-01), Gunther et al.
patent: 4607745 (1986-08-01), Wiese
patent: 5499728 (1996-03-01), Rumsey
Grau Curtiss A.
Rumsey Steven C.
Le Mark T.
Westinghouse Air Brake Company
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