Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1987-05-06
1989-05-02
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
403402, B23P 1900
Patent
active
048255297
ABSTRACT:
A framing bar connecting method for forming a frame by connecting adjacent framing bars with framing bar connectors. Each framing bar connector comprises: an L-shaped connecting plate having right-angled first and second arms, a slot formed in the first arm and threaded holes formed in the second arm; an L-shaped bottom plate having right-angled first and second arms and an opening formed in the first arm; and a lever provided with a cam at the base end thereof. In assembling a frame, the first arm of the connecting plate and the first arm of the bottom plate are inserted together with the lever in the dovetail groove of one of framing bars, the second arm of the connecting plate and the second arm of the bottom plate are inserted in the dovetail groove of the other framing bar, screws are screwed through the threaded holes of the second arm of the connecting plate to press the second arm of the connecting plate and the second arm of the bottom plate firmly against the inner surfaces of the dovetail groove, and then the lever is turned down so that the nose of the cam catches the bottom surface of the dovetail groove firmly and the cam presses the first arm of the connecting plate firmly against the inner surface of the dovetail groove as the lever is turned.
REFERENCES:
patent: 4538936 (1985-03-01), Zeidl
patent: 4694598 (1987-09-01), Eisenloeffel
patent: 4714373 (1987-12-01), Heekin
Sawada Nobuyoshi
Takeshima Kenji
Moon Charlie T.
Origin Co., Ltd.
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