Enclosed spring mechanism for trailer ramp doors

Details Enclosed spring mechanism for trailer ramp doors Enclosed spring mechanism for trailer ramp doors

2006-07-04

2006-07-04

Rodriguez, Pam (Department: 3683)

Spring devices

Coil

Including end thrust member

C049S372000, C296S026070, C296S057100, C296S149000

Reexamination Certificate

active

07070176

ABSTRACT:
A spring mechanism for a trailer ramp door which is adapted to be completely received in an opening in a side member of a tubular rectangular trailer rear entrance frame and with its bottom end securely attached to the inner surface of a flange extending along a side of the frame of the trailer ramp door and its top end securely attached through the opening to the inner surface of the side member, and the flange completely encloses the spring when the trailer ramp door is closed.

REFERENCES:
patent: 2436017 (1948-02-01), Powers
patent: 3464161 (1969-09-01), Jonsson
patent: 3983387 (1976-09-01), Van Steenhoven et al.
patent: 5185977 (1993-02-01), Brockman et al.
patent: 5384975 (1995-01-01), Yuran
patent: 5559409 (1996-09-01), Beierwaltes et al.

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