Keyless chuck
AssigneeJacobs Chuck Technology Corporation
InventorsPaul T. Jordan, Louis M. Shadeck, Robert O. Huff
Life of this patent
Estimating the term…
Abstract
A chuck has a spring connection between the nut which rotates to advance or retract the jaws and the control ring or sleeve which the user rotates to operate the chuck. The spring normally transmits tightening or loosening rotation from the sleeve to the nut. When the jaws contact a tool, however, the spring allows the sleeve to continue to rotate even though the nut is stopped by the jaw-tool contact. Continued rotation of the sleeve relative to the nut causes a cam mechanism interposed between these two elements to force the non-rotating nut axially forward. This applies a final tool-gripping force to the jaws.
Claims15
A chuck for releasably gripping a tool concentric with a longitudinal axis of said chuck comprising:
- a plurality of jaws circumferentially spaced from one another concentrically around said longitudinal axis and mounted for movement toward and away from one another in order to grip or release said tool;
- first means for engaging said jaws to cause said jaws to move toward or away from one another as a result of rotation of at least a rotatable part of said first means about said longitudinal axis and also as a result of reciprocation of at least a reciprocable part of said first means parallel to said longitudinal axis;
- second means mounted for rotation relative to at least said rotatable part of said first means about said longitudinal axis;
- spring means acting in a direction circumferentially around said longitudinal axis for resiliently urging said rotatable part of said first means to rotate with said second means, said spring means allowing said second means to rotate relative to said rotatable part of said first means when rotation of said rotatable part is impeded by contact between said jaws and said tool;
- and
- cam means acting between said second means and said reciprocable part of said first means for reciprocating said reciprocable part in response to rotation of said second means relative to said rotatable part of said first means.
A chuck for releasably gripping a tool concentric with a longitudinal axis of said chuck comprising:
- a body;
- a plurality of jaws disposed in said body, said jaws being circumferentially spaced from one another around said longitudinal axis and movable relative to said body toward and away from one another to grip or release said tool, each of said jaws having a threaded portion;
- a nut mounted on said body concentric with said longitudinal axis, said nut being rotatable relative to said body about said longitudinal axis and threadedly engaged with the threaded portions of said jaws for moving said jaws toward or away from one another as a result of rotation of said nut relative to said body and also as a result of reciprocation of said nut relative to said body parallel to said longitudinal axis;
- a sleeve mounted on said body for rotation relative to said body concentric with said longitudinal axis;
- a spring operatively connected between said sleeve and said nut for resiliently urging said nut to rotate with said sleeve, said spring allowing said sleeve to rotate relative to said nut when rotation of said nut is impeded by contact between said jaws and said tool;
- and
- cam means operatively connected between said sleeve and said nut for causing said nut to reciprocate relative to said body parallel to said longitudinal axis when said sleeve rotates relative to said nut.
Dependencies are inferred from the claim text.