Metal deforming – Tool and/or tool holder – Including flexible or yieldable tool or support
Patent
1979-04-23
1981-02-03
Larson, Lowell A.
Metal deforming
Tool and/or tool holder
Including flexible or yieldable tool or support
72705, 187 843, B21D 112
Patent
active
042480795
ABSTRACT:
A tram is disclosed, in its preferred form, for use in an apparatus for repairing and straightening. In the preferred embodiment, the tram includes a tram carrier member including first and second side walls. The tram is mounted between right and left track members by a shaft which extends through U-shaped apertures in the side walls and has a first end which engages a portion of the right track and a second end which engages a portion of the left track. The tram is moved by rotating the shaft by the use of an electric motor. Further, sprockets are provided on the first and second ends of the shaft which engages first and second stationary, elongated gear members located on the right and left track members forming a rack and pinion gear arrangement to allow movement of the tram. A steel roller is further provided on the shaft adjacent the sprockets to reduce the amount of weight carried by the sprockets and to allow the sprockets to mesh with the elongated gear members. The shaft further includes a flexible coupler adjacent its center to allow the shaft to flex. The tram also includes spring loaded bearing retainers slidably mounted to the side walls for resiliently mounting the shaft in the tram body. The tram includes a tram top which extends over the top surface of the tread member and a tram bottom which extends over the bottom surface of the tread member to receive the counterforce which the tram body is subjected by force applying members which are pivotally mounted to the tram.
REFERENCES:
patent: 2013785 (1935-09-01), Merrill
patent: 3106988 (1963-10-01), Hott
patent: 3257838 (1966-06-01), Spears
patent: 3269169 (1966-08-01), Latuff et al.
patent: 3365026 (1968-01-01), Mancini
patent: 3626747 (1971-12-01), Rouis
patent: 3798956 (1974-03-01), Kopczynski
patent: 3888100 (1975-06-01), Chisum
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