Swivel ram roller

Material or article handling – Elevator or hoist and loading or unloading means therefor – Comprising means enabling additional movement of carrier or...

Reexamination Certificate

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Details

C414S495000, C414S661000, C254S00200C, C254S00300C, C254S00500R, C254S011000, C254S0930VA, C187S243000, C187S244000

Reexamination Certificate

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10760580

ABSTRACT:
A roller mechanism for transporting loads over a surface, the roller mechanism including a body, at least one roller assembly that permits the body to move in at least one translational direction, the roller assembly being rotatably connected to the body, and a lifting mechanism attached to the body such that the body is selectively rotatable relative to the lifting mechanism, wherein the lifting mechanism can be operated to lift the roller assemblies out of contact with the surface.

REFERENCES:
patent: 1486784 (1924-03-01), Mingo
patent: 1997327 (1935-04-01), Warshaw
patent: 3881426 (1975-05-01), Long
patent: 4200424 (1980-04-01), Gerkey et al.
patent: 5151004 (1992-09-01), Johnson
patent: 2581634 (1986-11-01), None

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