Power drill having drill chuck tightener
First Claim
1. A drill chuck tightener apparatus for a reversible power drill having a body and a chuck reversibly rotatable with respect to the body, the chuck having a nose for receiving a drill bit and a sleeve rotatable about the nose, a drill bit for the drill being tightened in the nose by inserting the bit into the nose and rotating the nose in relation to the sleeve in a first direction of rotation, the drill bit being loosened by rotating the nose in relation to the sleeve in a second direction of rotation, the tightener comprising:
- (a) braking means attached to the sleeve for braking the sleeve from rotating with respect to the nose;
(b) contact mans movably attached to the body for contacting the braking means in a first position of the contact means, thereby braking the sleeve to tighten the drill bit as the chuck rotates in the first direction of rotation and to loosen the bit as the chuck rotates in the second direction of rotation, the contact means being restrained from movement in the first and second directions of rotation, the contact means being disengaged from the braking means in a second position; and
(c) means for adjusting a desired level of braking of the braking means.
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Accused Products
Abstract
A reversible power drill having a drill chuck tightener is disclosed. The drill has a body and chuck reversibly rotatable with respect to the body. The tightener comprises a lever or a contact post attached to the body of the drill and an impact button attached to the back portion of the chuck of the drill wherein the lever or post impacts the impact button as the chuck rotates, thereby tightening or loosening the chuck depending upon the direction of rotation of the drill. The lever or post is biased by a spring into a position which disengages it from the impact button when not in use.
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Citations
20 Claims
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1. A drill chuck tightener apparatus for a reversible power drill having a body and a chuck reversibly rotatable with respect to the body, the chuck having a nose for receiving a drill bit and a sleeve rotatable about the nose, a drill bit for the drill being tightened in the nose by inserting the bit into the nose and rotating the nose in relation to the sleeve in a first direction of rotation, the drill bit being loosened by rotating the nose in relation to the sleeve in a second direction of rotation, the tightener comprising:
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(a) braking means attached to the sleeve for braking the sleeve from rotating with respect to the nose; (b) contact mans movably attached to the body for contacting the braking means in a first position of the contact means, thereby braking the sleeve to tighten the drill bit as the chuck rotates in the first direction of rotation and to loosen the bit as the chuck rotates in the second direction of rotation, the contact means being restrained from movement in the first and second directions of rotation, the contact means being disengaged from the braking means in a second position; and (c) means for adjusting a desired level of braking of the braking means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A reversible power drill comprising:
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(a) a body; (b) a chuck reversibly rotatable with respect to the body, the chuck having a sleeve rotatable about a nose of the chuck, the nose being adapted for receiving a drill bit therein, the bit being tightened in the drill by rotating the nose in relation to the sleeve in a first direction of rotation, the bit being loosened by rotating the nose in relation to the sleeve in an opposite second direction of rotation; and (c) a drill chuck tightener comprising; (i) braking means attached to the sleeve for braking the sleeve from rotating with respect to the nose, the braking means including an impact button; and (d) contact means movably attached to the body for contacting the braking means in a first position of the contact means, thereby braking the sleeve to tighten the drill bit as the chuck rotates in the first direction of rotation and to loosen the drill bit as the chuck rotates in the second direction of rotation, the impact button impacting the contact means when the contact means is in the first position at least one for each revolution of the sleeve, the contact means being restrained from movement in the first and second directions of rotation, the contact means being disengaged from the braking means in a second position. - View Dependent Claims (15, 16, 17)
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18. A drill chuck tightener apparatus for a reversible power drill having a body and a chuck reversibly rotatable with respect to the body, the chuck having a sleeve rotatable about a nose, the drill bit being tightened in the nose by rotating the nose in relation to the sleeve in a first direction of rotation, the drill bit being loosened by rotating the nose in relation to the sleeve in an opposite second direction of rotation, the tightener comprising:
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(a) an impact button attached to the sleeve for braking the sleeve from rotating with respect to the nose; (b) contact means movably attached to the body of the drill for contacting the impact button in a first position of the contact means thereby braking the sleeve to tighten the drill bit as the chuck rotates in the first direction of rotation and to loosen the drill bit as the chuck rotates in the second direction of rotation, the contact means being restrained from movement in the first and second directions of rotation, the contact means being disengaged from the impact button in a second position; and (c) a helical spring for biasing the contact means into the second position and for allowing the contact means to be in the first position when the contact means is pressed toward the body of the drill, the button impacting the contact means when the contact means is in the first position at least once for every revolution of the sleeve. - View Dependent Claims (19, 20)
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Specification