Portable louver-forming tool
AssigneeDavid L. George, II
InventorDavid L. George, II
Life of this patent
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Abstract
A portable tool for forming louvers in a sheet metal work piece. The tool has a substantially C-shaped frame with an upper leg, a lower leg, and a body forming a throat in which the louvers are formed. A female die assembly is mounted on the lower leg of the frame. A male die is positioned in a carriage which slides longitudinally along the upper leg of the frame. Stops define the length of travel of the carriage and clamps hold the work piece between the female die assembly and the male die. An increasing cutting and forming force is applied to the male die, and against the work piece and the female die assembly, until a louver is cut and formed in the work piece.
Claims35
A portable tool for cutting and forming louvers in a sheet metal work piece comprising:
- a substantially C-shaped frame having a longitudinal axis and an upper leg, a lower leg, and a body forming a throat in which the louvers are cut and formed;
- a female die assembly mounted on said lower leg of said frame in said throat;
- a male die having a cutting edge which cuts the louvers and a body which forms the louvers;
- means for rotatably carrying said male die in said throat, said carrying means adapted to slide longitudinally along said upper leg of said frame;
- means for defining the length of travel of said carrying means;
- means for holding the work piece between said female die assembly and said male die;
- and
- means for applying an increasing cutting and forming force to said male die, and against the work piece and said female die assembly, until a louver is cut and formed in the work piece.
A portable tool for cutting and forming louvers in a sheet metal work piece comprising:
- a substantially C-shaped frame having a longitudinal axis and an upper leg with a track, a lower leg, and a body forming a throat in which the louvers are cut and formed;
- a male die having a cutting edge which cuts the louvers and a body which forms the louvers;
- a female die assembly supporting the work piece and having:
- (a) a mounting plate for mounting said female die assembly to said lower leg of said frame in said throat,
- (b) a shearing edge which, in combination with said cutting edge of said male die, cuts the louvers, and
- (c) a die former defining a groove which, in combination with said body of said male die, forms the louvers, said shearing edge and said die former affixed to said mounting plate;
- a carriage adapted to slide longitudinally along said upper leg of said frame and having a bottom surface;
- rollers at least one of which slidably mounts said carriage on said track of said upper leg of said frame;
- a lever having:
- (a) a first end, said lever pivotably affixed to said bottom surface of said carriage at said first end of said lever,
- (b) a second end, and
- (c) a bottom surface, said male die rotatably carried by said lever in said throat and extending below said bottom surface of said lever to cut and form the louvers without interference from said lever;
- a return spring having one end connected to said carriage and an opposite end connected to said second end of said lever opposite said first end of said lever which is pivotably affixed to said bottom surface of said carriage, said return spring exerting an upward force on said lever pulling said lever toward said carriage;
- a pivotable cam adapted to push downward on said lever against the force of said return spring to place said male die in contact with the work piece with desired force;
- means for defining the length of travel of said carriage;
- means for holding the work piece between said female die assembly and said male die;
- and
- means for applying an increasing cutting and forming force to said male die, and against the work piece and said female die assembly, until a louver is cut and formed in the work piece.
Dependencies are inferred from the claim text.