Scissor shear apparatus for shearing material

• US 20080289186A1
• Filed: 05/15/2008
• Published: 11/27/2008
• Est. Priority Date: 05/15/2007
• Status: Abandoned Application

• Current Assignee: Allan R. Adams
• Original Assignee: Allan R. Adams
• Inventors: Adams, Allan R.
• Application Number:
  US12/152,646
• Publication Number:
  US 20080289186A1
• Time in Patent Office: Days
• US Class Current: 30/92
• CPC Class Codes: B23D 17/02 characterised by drives or gearings therefor
• CPC Class Codes: B26B 13/28 Joints B25B7/06 takes precedence
• CPC Class Codes: B26B 15/00 Hand-held shears with motor-driven blades

Abstract

A scissor shear apparatus is disclosed for shearing material. The apparatus includes a frame and a first shear blade having a first and a second end, the first shear blade being pivotally secured to the frame about a first pivotal axis which extends through the frame and through the first shear blade between the ends thereof. The first shear blade defines a first cutting edge which is disposed adjacent to the first end thereof. A second shear blade has a first and a second extremity, the second shear blade being pivotally secured to the frame about the first pivotal axis between the extremities thereof. The second shear blade defines a second cutting edge which is disposed adjacent to the first extremity thereof such that the cutting edges cooperate together for shearing the material when the second end of the first shear blade and the second extremity of the second shear blade move away from each other for pivoting the shear blades relative to each other. A first link has a first and a second end, the first end of the first link being pivotally secured to the second end of the first shear blade for rotation thereof about a second pivotal axis which is disposed parallel and spaced relative to the first pivotal axis. A second link has a first and a second extremity, the first extremity of the second link being pivotally secured to the second extremity of the second shear blade for rotation thereof about a third pivotal axis which is disposed parallel and spaced relative to the first and second pivotal axes. An axle is disposed adjacent to the second end of the first link and the second extremity of the second link such that the axle and second end and extremity respectively of the links pivot about a fourth axis which is disposed spaced and parallel relative to the first, second and third axes. A first arm has a first and a second end, the first arm being secured to the frame about a fifth pivotal axis which is disposed spaced and parallel relative to the first, second, third and fourth axes. The fifth axis is disposed between the ends of the first arm. The first end of the first arm defines a lost motion linkage which is connected to the axle such that when the first arm pivots about the fifth axis, the axle is moved by the lost motion linkage for moving the second end of the first shear blade and the second extremity of the second shear blade towards and away from each other for pivoting the shear blades relative to each other. A second arm has a first and a second extremity, the first extremity of the second arm being pivotally secured to the second end of the first arm for pivotally driving the first arm. A crank is rotatably secured to the flame about a first rotational axis. The crank includes a crank pin which has a second rotational axis which is disposed spaced and parallel relative to the first rotational axis such that, when the crank rotates about the first rotational axis, the second rotational axis of the crank pin orbits about the first rotational axis. The crank pin is pivotally secured to the second extremity of the second arm such that, when the crank is rotated about the first rotational axis, the second arm is reciprocated for pivoting the first arm about the fifth pivotal axis so that the cutting edges of the blades shear the material.

Claims

1. A scissor shear apparatus for shearing material, said apparatus comprising:

a frame;

a first shear blade having a first and a second end, said first shear blade being pivotally secured to said frame about a first pivotal axis which extends through said frame and through said first shear blade between said ends thereof, said first shear blade defining a first cutting edge disposed adjacent to said first end thereof;

a second shear blade having a first and a second extremity, said second shear blade being pivotally secured to said frame about said first pivotal axis between said extremities thereof, said second shear blade defining a second cutting edge disposed adjacent to said first extremity thereof such that said cutting edges cooperate together for shearing the material when said second end of said first shear blade and said second extremity of said second shear blade move away from each other for pivoting said shear blades relative to each other;

a first link having a first and a second end, said first end of said first link being pivotally secured to said second end of said first shear blade for rotation thereof about a second pivotal axis which is disposed parallel and spaced relative to said first pivotal axis;

a second link having a first and a second extremity, said first extremity of said second link being pivotally secured to said second extremity of said second shear blade for rotation thereof about a third pivotal axis which is disposed parallel and spaced relative to said first and second pivotal axes;

an axle disposed adjacent to said second end of said first link and said second extremity of said second link such that said axle and second end and extremity respectively of said links pivot about a fourth pivotal axis which is disposed spaced and parallel relative to said first, second and third pivotal axes;

a first arm having a first and a second end, said first arm being secured to said frame about a fifth pivotal axis disposed spaced and parallel relative to said first, second, third and fourth pivotal axes, said fifth pivotal axis being disposed between said ends of said first arm, said first end of said first arm defining a lost motion linkage which is connected to said axle such that, when said first arm pivots about said fifth axis, said axle is moved by said lost motion linkage for moving said second end of said first shear blade and said second extremity of said second shear blade towards and away from each other for pivoting said shear blades relative to each other;

a second arm having a first and a second extremity, said first extremity of said second arm being pivotally secured to said second end of said first arm for pivotally driving said first arm;

a crank rotatably secured to said frame about a first rotational axis; and

said crank including;

a crank pin having a second rotational axis which is disposed spaced and parallel relative to said first rotational axis such that when said crank rotates about said first rotational axis, said second rotational axis of said crank pin orbits about said first rotational axis, said crank pin being pivotally secured to said second extremity of said second arm such that, when said crank is rotated about said first rotational axis, said second arm is reciprocated for pivoting said first arm about said fifth pivotal axis so that said cutting edges of said blades shear the material.

2. A scissor shear apparatus as set forth in claim 1 wherein

said flame includes:

a first plate having a first and a second end and a top and a bottom edge;

a second plate disposed spaced and parallel relative to said first plate, said second plate having a first and a second end and a top and a bottom edge.

3. A scissor shear apparatus as set forth in claim 2 wherein

said first pivotal axis extends normally through said plates, said blades being disposed between said plates.

4. A scissor shear apparatus as set forth in claim 3 wherein

said links are disposed between said plates.

5. A scissor shear apparatus as set forth in claim 2 wherein

said axle is disposed between said blades, said fourth pivotal axis being disposed normal to said plates such that said fourth pivotal axis moves relative to said first pivotal axis.

6. A scissor shear apparatus as set forth in claim 1 wherein

said lost motion linkage includes:

an elongate slot defined by said first end of said first arm for the slidable reception therein of said axle such that, when said first arm pivots about said fifth pivotal axis, said slot cooperates with said axle for urging said axle to move relative to said pivotal axis.

7. A scissor shear apparatus as set forth in claim 2 wherein

said plates define a first and a second guide respectively such that said axle extends through and is guided by said guides so that when said lost motion linkage cooperates with said axle, said axle is urged along and is guided by said guides.

8. A scissor shear apparatus as set forth in claim 7 wherein

said guides and said first pivotal axis are coplanar.

9. A scissor shear apparatus as set forth in claim 1 wherein

said first and second rotational axes are disposed spaced and parallel relative to said first pivotal axis.

10. A scissor shear apparatus as set forth in claim 1 wherein

said first and fifth pivotal axes and said first rotational axis are fixed relative to said frame;

said second, third and fourth pivotal axes and said second rotational axis are movable relative to said frame.

11. A scissor shear apparatus as set forth in claim 1 further including:

a motor drivingly connected to said crank for rotating said crank about said first rotational axis.

12. A scissor shear apparatus for shearing material, said apparatus comprising:

a flame;

a first shear blade having a first and a second end, said first shear blade being pivotally secured to said frame about a first pivotal axis which extends through said flame and said first shear blade between said ends thereof, said first shear blade defining a first cutting edge disposed adjacent to said first end thereof;

a second shear blade having a first and a second extremity, said second shear blade being pivotally secured to said flame about said first pivotal axis between said extremities thereof, said second shear blade defining a second cutting edge disposed adjacent to said first extremity thereof such that said cutting edges cooperate together for shearing the material when said second end of said first shear blade and said second extremity of said second shear blade move away from each other for pivoting said shear blades relative to each other;

a first link having a first and a second end, said first end of said first link being pivotally secured to said second end of said first shear blade for rotation thereof about a second pivotal axis which is disposed parallel and spaced relative to said first pivotal axis;

a second link having a first and a second extremity, said first extremity of said second link being pivotally secured to said second extremity of said second shear blade for rotation thereof about a third pivotal axis which is disposed parallel and spaced relative to said first and second pivotal axes;

an axle disposed adjacent to said second end of said first link and said second extremity of said second link such that said axle and second end and extremity respectively of said links pivot about a fourth axis which is disposed spaced and parallel relative to said first, second and third axes;

a first arm having a first and a second end, said first arm being secured to said frame about a fifth pivotal axis disposed spaced and parallel relative to said first, second, third and fourth axes, said fifth axis being disposed between said ends of said first arm, said first end of said first arm defining a lost motion linkage connected to said axle such that when said first arm pivots about said fifth axis, said axle is moved by said lost motion linkage for moving said second end of said first shear blade and said second extremity of said second shear blade towards and away from each other for pivoting said shear blades relative to each other;

a second arm having a first and a second extremity, said first extremity of said second arm being pivotally secured to said second end of said first arm for pivotally driving said first arm;

a crank rotatably secured to said frame about a first rotational axis;

said crank including;

a crank pin having a second rotational axis which is disposed spaced and parallel relative to said first rotational axis such that when said crank rotates about said first rotational axis said second rotational axis of said crank pin orbits about said first rotational axis, said crank pin being pivotally secured to said second extremity of said second arm such that, when said crank is rotated about said first rotational axis, said second arm is reciprocated for pivoting said first arm about said fifth pivotal axis so that said cutting edges of said blades shear the material; and

said lost motion linkage includes;

an elongate slot defined by said first end of said first arm for the slidable reception therein of said axle such that, when said first arm pivots about said fifth pivotal axis, said slot cooperates with said axle for urging said axle to move relative to said first pivotal axis.

13. A scissor shear apparatus for shearing material, said apparatus comprising:

a frame;

a first shear blade having a first and a second end, said first shear blade being pivotally secured to said frame about a first pivotal axis which extends through said frame and said first shear blade between said ends thereof, said first shear blade defining a first cutting edge disposed adjacent to said first end thereof,

a second shear blade having a first and a second extremity, said second shear blade being pivotally secured to said frame about said first pivotal axis between said extremities thereof, said second shear blade defining a second cutting edge disposed adjacent to said first extremity thereof such that said cutting edges cooperate together for shearing the material when said second end of said first shear blade and said second extremity of said second shear blade move away from each other for pivoting said shear blades relative to each other;

a first link having a first and a second end, said first end of said first link being pivotally secured to said second end of said first shear blade for rotation thereof about a second pivotal axis which is disposed parallel and spaced relative to said first pivotal axis;

a second link having a first and a second extremity, said first extremity of said second link being pivotally secured to said second extremity of said second shear blade for rotation thereof about a third pivotal axis which is disposed parallel and spaced relative to said first and second pivotal axes;

an axle disposed adjacent to said second end of said first link and said second extremity of said second link such that said axle and second end and extremity respectively of said links pivot about a fourth axis which is disposed spaced and parallel relative to said first, second and third axes;

a first arm having a first and a second end, said first arm being secured to said frame about a fifth pivotal axis disposed spaced and parallel relative to said first, second, third and fourth axes, said fifth axis being disposed between said ends of said first arm, said first end of said first arm defining a lost motion linkage connected to said axle such that when said first arm pivots about said fifth axis, said axle is moved by said lost motion linkage for moving said second end of said first shear blade and said second extremity of said second shear blade towards and away from each other for pivoting said shear blades relative to each other;

a second arm having a first and a second extremity, said first extremity of said second arm being pivotally secured to said second end of said first arm for pivotally driving said first arm;

a crank rotatably secured to said frame about a first rotational axis;

said crank including;

a crank pin having a second rotational axis which is disposed spaced and parallel relative to said first rotational axis such that when said crank rotates about said first rotational axis said second rotational axis of said crank pin orbits about said first rotational axis, said crank pin being pivotally secured to said second extremity of said second arm such that, when said crank is rotated about said first rotational axis, said second arm is reciprocated for pivoting said first arm about said fifth pivotal axis so that said cutting edges of said blades shear the material;

said flame including;

a first plate having a first and a second end and a top and a bottom edge;

a second plate disposed spaced and parallel relative to said first plate, said second plate having a first and a second end and a top and a bottom edge;

said first pivotal axis extends normally through said plates, said blades being disposed between said plates;

said links are disposed between said plates;

said axle is disposed between said blades, said fourth pivotal axis being disposed normal to said plates such that said fourth pivotal axis moves relative to said first pivotal axis;

said lost motion linkage including;

an elongate slot defined by said first end of said first arm for the slidable reception therein of said axle such that, when said first arm pivots about said fifth pivotal axis, said slot cooperates with said axle for urging said axle to move relative to said pivotal axis;

said plates define a first and a second guide respectively such that said axle extends through and is guided by said guides so that when said lost motion linkage cooperates with said axle, said axle is urged along and is guided by said guides;

said guides and said first pivotal axis are coplanar;

said first and second rotational axes are disposed spaced and parallel relative to said first pivotal axis;

said first and fifth pivotal axes and said first rotational axis are fixed relative to said flame;

said second, third and fourth pivotal axes and said second rotational axis are movable relative to said flame; and

a motor drivingly connected to said crank for rotating said crank about said first axis of rotation.