Clamp for holding work pieces in the formation of trusses

Work holders – Plural holders to hold workpieces relative to each other

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Details

269268, 269900, 269910, B25B 110

Patent

active

048756660

ABSTRACT:
A clamp for holding lumber which is used to form roof trusses. A plurality of clamps are placed on a work table oriented to constrain plural pieces of lumber forming the truss until truss plates attach ends of adjacent pieces of lumber. The clamp includes an inner and outer sleeve, the inner sleeve telescopes with respect to the outer sleeve and a spring bias connection exists between the inner and outer sleeve through a threaded shaft which causes the inner sleeve to telescope so that imperfections in the lumber can be accounted for and several identically configured trusses can be formed without removing the clamps from the table. Specific types of clamp support for the lumber as well as a specific means for supporting the clamp on the work table is disclosed. An embodiment is disclosed which includes an inner and outer sleeve, where the inner sleeve telescopes with respect to the outer sleeve and is frictionally retained along with spring biasing to allow the inner sleeve to be placed relative to the outer sleeve.

REFERENCES:
patent: 1450940 (1923-04-01), Cobb
patent: 4379426 (1983-04-01), Thompson et al.
patent: 4679781 (1987-07-01), Le Poire
patent: 4743004 (1988-05-01), Klass

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