Greaseless door lock
AssigneeZeftek, Inc.
InventorsMichael K. Burke, John D. Anderson, Walter J. Peach
Life of this patent
Estimating the term…
Abstract
A greaseless door lock for doors on railroad cars which eliminates the need to lubricate the door locks. The greaseless door lock includes a C-shaped bracket having a side wall and spaced apart end walls attached to the side wall wherein the end walls include aligned aperatures for slidably receiving a locking pin. The greaseless door lock includes at least one bushing mounted in each aperature to prevent the locking pin from engaging the end walls. Two semi-clyindrical bushings or one cylindrical bushing may be mounted in each aperature.
Claims26
In a railroad car having a door and a door lock for the door on the railroad car, said door lock comprising:
- a locking pin;
- a bracket having a side wall and spaced-apart end walls connected to and transversely extending from said side wall, said end walls defining aligned apertures for receiving said locking pin;
- and
- at least one bushing mounted in each aperture, wherein each bushing includes a pair of semi-cylindrical bodies each having a first end and a second end, a first flange extending transversely from said first end, and a second flange extending transversely from said second end, wherein said first flange and said second flange of each body define a slot adapted to receive one of the end walls and wherein the first flange is larger than the second flange,
- whereby the bushings prevent the locking pin from directly contacting the end walls of the bracket and eliminate the need to lubricate the door lock.
In a railroad car having a door and a door lock for the door on the railroad car, wherein the door lock includes a substantially C-shaped bracket having a side wall and spaced apart end walls connected to said side wall, said end walls having inner edges which define aligned apertures for receiving a locking pin, the improvement in a bushing mounted in each aperture for reducing the friction between said locking pin and said inner edges of the end walls without using a lubricant, said bushing comprising at least two bodies, a first flange extending from each body and means extending from each body for co-acting with the first flange to secure the body in the aperture, wherein said first flange is larger than said extending means.
In a railroad car having a door and a door lock for the door on the railroad car, said door lock comprising:
- a locking pin;
- a bracket having a side wall and spaced-apart end walls connected to and transversely extending from said side wall, said end walls defining aligned apertures for receiving said locking pin;
- and
- a bushing mounted in each aperture, wherein each bushing includes at least two-co-acting bodies each having a first end and a second end, a first flange extending transversely from said first end, and a second flange extending transversely from said second end, wherein the first flange is larger than the second flange,
- whereby the bushings co-acting prevent the locking pin from directly contacting the end walls of the bracket and eliminate the need to lubricate the door lock.
In a railroad car having a door and a door lock for the door on the railroad car, said door lock comprising:
- a locking pin;
- a bracket having a side wall and spaced-apart end walls connected to and transversely extending from said side wall, said end walls defining aligned apertures for receiving said locking pin;
- and
- a bushing mounted in each aperture, wherein each bushing includes at least two co-acting bodies each having a first end and a second end, a first flange extending transversely from said first end, and a second flange extending transversely from said second end, wherein the second flange transversely extends from only a portion of the second end of the body,
- whereby the bushings co-acting prevent the locking pin from directly contacting the end walls of the bracket and eliminate the need to lubricate the door lock.
In a railroad car having a door, a door lock and a bushing for the door lock on the railroad car wherein the door lock includes a locking pin, a substantially C-shaped bracket having a side wall and spaced-apart end walls connected to said side wall, said end walls having inner edges which define aligned apertures for receiving said locking pin, said bushing comprising:
- at least two self-lubricating bodies each having a first end and a second end;
- a first flange extending transversely from said first end of each body;
- and
- a second flange extending transversely from only a portion of said second end of each body, said first flange being larger than said second flange said first flange and said second flange defining a slot adapted to receive the inner edge of one of said end walls when said body is mounted in said aperture defined by said inner edge.
In a railroad car having a door, a door lock for the door on the railroad car, said door lock comprising:
- a locking pin;
- a bracket having a side wall and spaced-apart end walls connected to and transversely extending from said side wall, said end walls defining aligned apertures for receiving said locking pin;
- and
- a bushing including a pair of co-acting bodies mounted in spaced-apart relation in each aperture, wherein each body includes a semi-cylindrical body having a first end and a second end, a first flange extending transversely from said first end, and a second flange extending transversely from said second end, wherein the first flange is larger than the second flange;
- whereby the bushings prevent the locking pin from directly contacting the end walls of the bracket and eliminate the need to lubricate the door lock.
Dependencies are inferred from the claim text.