Chuck with torque indicator
View Patent ↗A chuck for a driver having a rotatable drive shaft, the chuck having a cylindrical body member having a nose section and a tail section. A plurality of jaws is slidably positioned in the body, and each jaw has a jaw face and threads. A nut is rotatably mounted on the body in engagement with the jaw threads. A nut retainer member includes a first portion fixed to the body and a second portion engaging the nut. The chuck includes a plurality of recesses and a deflectable pawl biased toward and engaging the plurality of recesses. In a first state, one of the deflectable pawl and the plurality of recesses travels with the body and the other with the nut, and in a second state they travel together.
1. A chuck for use with a manual or powered driver having a drive shaft, said chuck comprising:
a. a generally cylindrical body having a nose section and a tail section, said tail section being configured to rotate with the drive shaft of the driver and said nose section having an axial bore formed therein;
b. a plurality of jaws movably disposed with respect to said body in communication with said axial bore;
c. a nut rotatably mounted about said body and in operative communication with said jaws so that rotation of said nut in a closing direction moves said jaws toward an axis of said axial bore and rotation of said nut in an opening direction moves said jaws away from said axis;
d. a nut retainer member including a first portion and a second portion, said first portion being fixed to said body and said second portion being configured to engage said nut;
e. a plurality of recesses, and
f. at least one deflectable pawl biased toward and continuously engaging said plurality of recesses,
wherein one of said plurality of recesses and said at least one deflectable pawl travel with said nut, and the other of said plurality of recesses and said at least one deflectable pawl travels:
with said body when said chuck is in a first state in which said jaws are clamped on a shank of a tool thereby causing an audible click, and
with said one of said plurality of recesses and said at least one deflectable pawl when said chuck is in a second state.
2. The chuck of claim 1 , further comprising a first ring defining said recesses, wherein said first ring is rotatable with respect to said nut over a limited distance.
3. The chuck of claim 2 , further comprising a second ring defining said at least one deflectable pawl, said second ring being disposed between said nut and said body.
4. The chuck of claim 3 , wherein said body includes a thrust ring.
5. The chuck of claim 4 , said chuck further comprising a bearing located intermediate said nut and said thrust ring.
6. The chuck of claim 5 , said chuck further comprising a bearing washer located intermediate said bearing and said thrust ring.
7. The chuck of claim 6 , wherein said second ring is intermediate said bearing washer and said thrust ring.
8. The chuck of claim 7 , wherein when said chuck is in said first state, said nut imparts axially rearward force against said bearing thereby rotationally locking said second ring between said bearing washer and said body.
9. The chuck of claim 2 , wherein said plurality of recesses is formed on an inner circumference of said first ring.
10. The chuck of claim 1 , wherein when said chuck is in said first state, said nut is rotatable with respect to said body over a limited distance in said opening direction so that said jaws unclamp from the tool shank placing said chuck in said second state where said at least one deflectable pawl travels with said plurality of recesses.
11. The chuck of claim 1 , wherein when said chuck is in said first state, said nut imparts axially rearward force against said body thereby rotationally locking said one of said plurality of recesses and said at least one deflectable pawl to said body.
12. The chuck of claim 1 , further comprising at least one sleeve wherein said at least one sleeve is rotationally fixed to said nut.
13. The chuck of claim 1 , wherein said nut retainer member is press fit to said body.
14. The chuck of claim 1 , wherein said first portion of said nut retainer member is cylindrical and said second portion is frustoconically shaped.
15. A chuck for use with a manual or powered driver having a drive shaft, said chuck comprising:
a. a generally cylindrical body having a nose section and a tail section, said tail section being configured to rotate with the drive shaft of the driver and said nose section having an axial bore formed therein;
b. a plurality of jaws movably disposed with respect to said body in communication with said axial bore;
c. a nut rotatably mounted about said body and in operative communication with said jaws so that rotation of said nut in a closing direction moves said jaws toward an axis of said axial bore and rotation of said nut in an opening direction moves said jaws away from said axis;
d. a nut retainer member including a first portion and a second portion, said first portion being fixed to said body and said second portion being configured to engage said nut;
e. a plurality of recesses, and
f. at least one deflectable pawl biased toward and engaging said plurality of recesses,
wherein one of said plurality of recesses and said at least one deflectable pawl travel with said nut, and the other of said plurality of recesses and said at least one deflectable pawl travels:
with said body when said chuck is in a first state in which said jaws are clamped on a shank of a tool thereby causing an audible click, and
with said one of said plurality of recesses and said at least one deflectable pawl about said body when said chuck is in a second state.
16. The chuck of claim 15 , further comprising a first ring defining said recesses, and a second ring defining said at least one deflectable pawl.
17. The chuck of claim 16 , wherein said plurality of recesses is formed on an inner circumference of said first ring.
18. The chuck of claim 15 , wherein when said chuck is in said first state, said nut is rotatable with respect to said body over a limited distance in said opening direction so that said jaws unclamp from the tool shank placing said chuck in said second state where said at least one deflectable pawl travels with said plurality of recesses.
19. A chuck for use with a manual or powered driver having a drive shaft, said chuck comprising:
a. a generally cylindrical body having a nose section and a tail section, said tail section being configured to rotate with the drive shaft of the driver and said nose section having an axial bore formed therein;
b. a plurality of jaws movably disposed with respect to said body in communication with said axial bore;
c. a nut rotatably mounted about said body and in operative communication with said jaws so that rotation of said nut in a closing direction moves said jaws toward an axis of said axial bore and rotation of said nut in an opening direction moves said jaws away from said axis;
d. a nut retainer member including a first portion and a second portion, said first portion being fixed to said body and said second portion being configured to engage said nut;
e. a plurality of recesses, and
f. at least one deflectable pawl biased toward and continuously engaging said plurality of recesses,
wherein one of said plurality of recesses and said at least one deflectable pawl travel with said nut, and the other of said plurality of recesses and said at least one deflectable pawl travels:
with said body when said chuck is in a first state in which said jaws are clamped on a shank of a tool thereby causing an audible click,
with said one of said plurality of recesses and said at least one deflectable pawl when said chuck is in a second state, and
wherein when said chuck is in said first state, said nut is rotatable with respect to said body over a limited distance in said opening direction so that said jaws unclamp from the tool shank placing said chuck in said second state where said at least one deflectable pawl travels with said plurality of recesses.
20. The chuck of claim 19 , further comprising a first ring defining said recesses, wherein said first ring is rotatable with respect to said nut over a limited distance.