Long travel high capacity friction draft gear assembly

Details Long travel high capacity friction draft gear assembly Long travel high capacity friction draft gear assembly

2007-02-13

2007-02-13

Morano, S. Joseph (Department: 3617)

Railway draft appliances

Cushioned

Combined spring and friction

Reexamination Certificate

active

10927910

ABSTRACT:
A friction clutch type draft gear assembly includes a housing having an open front end and a closed rear end forming a ledge for enabling a longer buff and draft travel while fitting into a 24.625 inch draft gear pocket. A friction clutch mechanism includes a pair of outer stationary plate members, a pair of movable plate members, a pair of inner stationary plate members having an inner surface which is tapered at an angle of approximately 4.5°, a pair of wedge shoe members having an upper surface which is tapered from a point disposed inwardly from the tapered outer surface inwardly toward and at an acute angle relative to a longitudinal axis of the friction clutch mechanism, and a center wedge member which includes a pair of correspondingly tapered surfaces frictionally engageable with the upper tapered surface of a respective one of the pair of wedge shoe members. The tapered upper surface of the pair of wedge shoe members is tapered at an angle of approximately 49.0°–50.0°. The pair of tapered surfaces of the center wedge is tapered at an angle of about 49.5°.

REFERENCES:
patent: 3447693 (1969-06-01), Cardwell
patent: 4305514 (1981-12-01), Zanow et al.
patent: 5590797 (1997-01-01), Duffy et al.
patent: 6446820 (2002-09-01), Barker et al.
patent: 297100 (1929-07-01), None

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