Cutting fixture exhibiting ram actuated and multiplying lever force for removing such as an H-tap crimp from a utility power line
View Patent ↗A cutting fixture for incising a tap portion installed between a pair power cables. A fixture body is mounted atop a power press tool in contact with a linearly advancing ram of the tool. The fixture body terminates in a downwardly facing support surface. A pair of levers are pivotally mounted to the fixture body, each including a bottom end profile and a roller at an upper end which, in response to upward displacement of the ram, multi-directionally advances to displace against an underside of a linearly movable carriage supported upon the fixture body in proximity to the levers. A cutting blade is supported upon the carriage and, in response to elevation of the carriage, displaces upwardly in a force multiplying fashion to section the H-tap positioned between the carriage and the downwardly facing support surface in order to permit its removal while preserving the integrity of the cables.
1. A cutting fixture mounted upon a linear ram power tool for incising a tap installed between a pair of main and take off cable power cables, comprising: a fixture body adapted to being mounted atop the power tool in contact with a linearly advancing ram of the power tool, said fixture body terminating in an upper end defining a downwardly facing support surface of an anvil
a pair of levers pivotally mounted to said fixture body, upper ends of said levers each including a roller, said levers each including a bottom end profile which, in response to upward displacement of the ram, causes said rollers supported at said upper ends of said levers to actuate in opposing and inward directions relative to an axial centerline extending through said fixture body;
a carriage supported upon said fixture body in proximity to said levers, said carriage including a pair of lateral bottom surfaces extending in opposite directions from said axial centerline such that said carriage is directly engaged by said rollers, said carriage including an upwardly facing support surface opposing said downwardly facing support surface of said fixture body adapted to support the cables and the tap therebetween; and
a cutting blade supported between said carriage and said downwardly facing support surface and, in response to elevation of said carriage, causing said rollers to concurrently and inwardly displace along said lateral bottom surfaces of said carriage in directions toward said centerline for sectioning the tap from the cables to permit removal of the tap while preserving the integrity of the cables.
2. The invention as described in claim 1 , further comprising a pocket configured within said upwardly facing support surface of said carriage and receiving an insert incorporating said cutting blade.
3. The invention as described in claim 1 , further said blade being incorporated into said downwardly facing support surface and opposing said upwardly facing support surface which functions as a movable anvil support surface.
4. The invention as described in claim 1 , further comprising a pair of pins projecting from a base location of said carriage and seating through a slot defined in a front plate of said fixture body in proximity to said levers.
5. A cutting fixture mounted upon a linear actuating hand held power tool for incising a tap installed between a pair of main and take off cable power cables, said fixture comprising:
a fixture body adapted to being mounted to an end of the hand-held tool in proximity to a linearly advancing ram, said fixture body terminating in an upper end defining a downwardly facing support surface of an anvil;
a pair of levers pivotally mounted at lower end locations of said fixture body and extending in outwardly angled directions, said levers each including a bottom end surface configured profile which, in response to upward displacement of power tool ram, is caused to actuate in a concurrent inward direction towards an axially directed centerline extending through said fixture body;
upper ends of each pivoting lever further including a roller which advances axially relative to the centerline, concurrent with being pivotally retracted toward said fixture body;
a carriage supported upon said fixture body in proximity to said levers and including a pair of lateral bottom surfaces extending in opposite directions from said axially directed centerline such that said carriage is directly engaged by said rollers, said carriage including an upwardly facing support surface opposing said downwardly facing support surface of said fixture body and adapted to support the tap and conductive portions of the cables positioned therebetween; and
a cutting blade positioned between said carriage and downwardly opposing facing support surface and, in response to elevation of said carriage, causing said rollers to concurrently and inwardly displace along said lateral bottom surfaces of said carriage in directions toward said centerline for exerting a force multiplier to section the tap from the cables to permit removal of the tap while preserving the integrity of the cables.
6. The invention as described in claim 5 , further comprising said cutting blade being incorporated into an insert positioned atop said carriage by seating said insert into a pocket configured within an upper facing interior surface of said carriage.
7. The invention as described in claim 5 , further said blade being incorporated into said downwardly facing support surface and opposing said upwardly facing support surface which functions as a movable anvil support surface.
8. The invention as described in claim 5 , further comprising a pair of pins projecting from a base location of said carriage and seating through a slot defined in a front plate of said fixture body in proximity to said levers.
9. An assembly for incising a tap installed between a pair of main and take off cable power cables, said assembly comprising:
a hand-held power tool having a tool body supporting a linearly advancing ram;
a fixture body mounted atop said tool body, such that said ram is elevate-able in a direction toward said fixture body;
said fixture body terminating in an upper end defining a downwardly facing support surface of an anvil;
a pair of levers pivotally mounted at lower end locations of said fixture body and extending in outwardly angled directions, said levers each including a bottom end surface configured profile which, in response to upward displacement of said ram, is caused to actuate in a concurrent inward direction towards an axial extending centerline of said fixture body;
upper ends of each pivoting lever further including a roller which advances axially relative to the centerline, concurrent with being pivotally retracted toward the centerline of the fixture body;
a carriage supported upon the fixture body in proximity to said levers and including a pair of lateral bottom surfaces extending in opposite directions from said axial centerline such that said carriage is directly engaged by said rollers, said carriage including an upwardly facing support surface opposing said downwardly facing support surface of the said fixture body and adapted to support the tap and cables therebetween; and
a cutting blade positioned between said carriage and downwardly opposing facing support surface and, in response to elevation of said carriage, causing said rollers to concurrently and inwardly displace along said lateral bottom surfaces of said carriage in directions toward said centerline for exerting a force multiplier to section the tap from the cables to permit removal of the tap while preserving the integrity of the cables.
10. The assembly as described in claim 9 , further comprising said cutting blade being incorporated into an insert positioned atop said carriage by seating said insert into a pocket configured within an upper facing interior surface of said carriage.
11. The assembly as described in claim 9 , further said blade being incorporated into said downwardly facing support surface and opposing said carriage which functions as a movable anvil support surface.
12. The assembly as described in claim 9 , said power tool further comprising a pair of split mounting lobes for receiving said cutting fixture.
13. The assembly as described in claim 9 , further comprising aligning apertures configured within said lobes and said fixture body and receiving a crosswise inserted pin.