Cutting tool holder or adaptor

Claim 2

A cutting tool holder adapted to detachably support a cutting tool bit comprising: a body means, said body means including a holding means adapted for detachably supporting a cutting tool bit to said body means, handle means operatively connected to said body means, and a flexible coupling means interposed in said body means between said handle means and said holding means to permit limited angular deflection of said body means relative to the center line of said tool bit adapted to be secured thereto, and including: a frangible shear means on said body means having a predetermined shear stress whereby said shear means is adapted to fracture when the applied torque on said body means exceeds the predetermined shear stress of said frangible means.

Claim 3

A cutting tool holder adapted to detachably support a cutting tool bit comprising: a body means, said body means including a holDing means adapted for detachably supporting a cutting tool bit to said body means, handle means operatively connected to said body means, and a flexible coupling means interposed in said body means between said handle means and said holding means to permit limited angular deflection of said body means relative to the center line of said tool bit adapted to be secured thereto, wherein said flexible coupling means includes a bellows torque drive.

Claim 4

A cutting tool holder adapted to detachably support a cutting tool bit comprising: a body means, said body means including a holDing means adapted for detachably supporting a cutting tool bit to said body means, handle means operatively connected to said body means, and a flexible coupling means interposed in said body means between said handle means and said holding means to permit limited angular deflection of said body means relative to the center line of said tool bit adapted to be secured thereto, wherein said flexible coupling means includes a bellows torque drive.

Claim 5

The invention as defined in claim 2 wherein said body means includes: a shank portion, said tool bit holding means being connected to one end of said shank portion, and said bellows torque drive being connected to the other end of said shank portion, and said handle means being connected to said body means above said bellows torque drive.

Claim 6

The invention as defined in claim 3 wherein said holding means includes a plurality of spring fingers integrally formed with said shank portion to define an expandible holder for a tool bit, and a chuck collar threaded to said fingers for detachably securing a tool bit between said fingers. 5 A cutting tool holder adapted to detachably support a cutting tool bit comprising: a body means, said body means including a holding means adapted for detachably supporting a cutting tool bit to said body means, handle means operatively connected to said body means, and a flexible coupling means interposed in said body means between said handle means and said holding means to permit limited angular deflection of said body means relative to the center line of said tool bit adapted to be secured thereto, wherein said flexible coupling means includes a bellows torque drive, and a frangible shear means having a predetermined breaking stress whereby said shear means fractures when the applied torque on said torque drive exceeds said breaking stress.

Claim 7

The invention as defined in claim 5 wherein said body means includes a shank portion, and said shear means includes a shear groove circumscribing said shank portion intermediate the ends thereof.

Claim 8

The invention as defined in claim 5 wherein said body means includes an upper shank portion and a lower shank portion, and said shear means being interposed between said upper and lower shank portions.

Claim 9

The invention as defined in claim 7 wherein said shear means includes a shear pin having a frangible section interconnecting said upper and lower shank portions.

Claim 10

The invention as defined in claim 8 wherein said upper and lower shank portions have complementary laterally extending flanges having aligned openings therein, and said shear pin extends through said aligned opening to secure said flanges together.

Claim 11

The invention as defined in claim 9 wherein said flanges include a plurality of circumferentially spaced aligned openings said aligned openings having progressively increasing diameters for accommodating a shear pin of complementary size whereby the maximum applied torque may be varied accordingly.

Claim 12

The invention as defined in claim 7 wherein said upper shank portions and lower shank portions have complementary interfitting portions, means for detachably securing said shank portions together, and said shear means being interposed between upper and lower shank portions to connected said portions in driving relationship.

Claim 13

The invention as defined in claim 11 wherein said upper and lower shank portions define a recess therebetween, said shear means being disposed within said recess, said shear means including pin having a frangible section, and said pin having opposed drive connections, and said upper and lower shank portions having complementary drive connections to mate with the drive connections of said pin.

Claim 14

A tool holder adaptor comprising: an adaptor body, said body having a tool bit holder formed in one end thereof for engaging with the end of a tool bit, and having a shear groove circUmscribing an intermediate portion of said body, a bellows torque drive connected to said body, and a shank connected to said bellows torque drive extending upwardly thereof, said shank being adapted to be received in the chuck end of a wrench.

Claim 15

A tool holder adaptor comprising: an adaptor body, said body having a tool bit holder formed in one end thereof for engaging with the end of a tool bit, and having a shear groove circUmscribing an intermediate portion of said body, a bellows torque drive connected to said body, and a shank connected to said bellows torque drive extending upwardly thereof, said shank being adapted to be received in the chuck end of a wrench.

Claim 16

A wrench adapted for maintaining the alignment of an associated cutting tool bit during a cutting operation comprising: a wrench body having an upper body portion and a lower body portion, said lower body portion having means for receiving a cutting tool bit, means for interconnecting said body portions together, said connecting means including a shear means having a predetermined fracturing stress, and a bellows torque drive connected to the upper body portion to permit limited angular deflection of said upper body portion relative to the longitudinal axis of said lower body portion and associated tool bit.

Claim 17

A wrench adapted for maintaining the alignment of an associated cutting tool bit during a cutting operation comprising: a wrench body having an upper body portion and a lower body portion, said lower body portion having means for receiving a cutting tool bit, means for interconnecting said body portions together, said connecting means including a shear means having a predetermined fracturing stress, and a bellows torque drive connected to the upper body portion to permit limited angular deflection of said upper body portion relative to the longitudinal axis of said lower body portion and associated tool bit.

Claim 18

The invention as defined in claim 14 wherein said upper and lower body portions have complementary flanges adapted to be disposed in abutting relationship, said flanges having aligned openings therein, said shear means comprising a shear pin extending through said aligned openings, said shear pin having a shear groove formed therein, said shear groove being disposed in a plane of the abutting surface of said flanges.

Claim 19

The invention as defined in claim 14 wherein said upper and lower body portions include complementary interfitting male and female end portions, said complementary end portions having a transversely extending aligned opening, and a shear pin extended through said openings for connecting said body portions together in driving relationship.

Claim 20

The invention as defined in claim 14 wherein said body portion includes complementary interfitting male and female end portions, said interconnecting means including a retainer means for detachably coupling said end portions together, one of said end portions having a recess formed therein, and said shear means comprising a shear pin having opposed drive connectors, and means formed in the respective end portions of said upper and lower body portions to engage in driving connection with said drive connectors.