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US 4,284,285 AGranted
Self-adjusting rotary chuck
OwnerFriedrich P. Futterinventor
Life of this patent
Estimating the term…
Abstract
A chuck having self-closing jaws, and a key-threaded rotary ring to engage said jaws in working contact with a tool within their grasp or to disengage said jaws so as to permit their free movement. The jaws themselves are such that the act of performing work with a tool held by said jaws increases the holding pressure exerted by said jaws on said tool.
Claims1
In a chuck for releasably holding an object such as a tool or workpiece, including
- circumferentially spaced jaws for grasping said object which are
- movable radially outwardly to an open position to permit insertion of said object therebetween, and
- adapted to move radially inwardly to an object-grasping position, and
- means for adjusting the radial position of said jaws to grasp objects of varying size,
- the improvements comprising:
- (a) inclined key threads on said jaws;
- (b) a rotatable jaw-positioning collar around said jaws, including inclined, inwardly extending, circumferentially spaced key threads adapted to cooperatively engage and disengage the key threads on said jaws, which collar
- (i) urges said jaws axially outwardly and radially inwardly to said object-grasping position when said collar is rotated to engage said key threads, and
- (ii) permits free axial and radial movement of said jaws to said open position when said collar is rotated to disengage said key threads;
- (c) means for rotating said collar to engage and disengage said key threads;
- and
- (d) means for normally yieldably urging said jaws axially outwardly and radially inwardly when said key threads are disengaged.
9 more elements
Dependencies are inferred from the claim text.