US 6,648,342 B2Granted

Chuck

AssigneePower Tool Holders Incorporated

InventorsWilliam H. Aultman, Robert A. Grogan

Life of this patent

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Abstract

A chuck includes a generally cylindrical body having a nose section and a tail section. A plurality of jaws are movably disposed with respect to the body to and away from the chuck's axial bore. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Claims5

Dependent claims

A chuck for use with a manual or powered driver having a rotatable drive shaft, said chuck comprising:

a. a generally cylindrical body having a nose section and a tail section configured to rotate with said drive shaft, said nose section having an axial bore formed therein and a plurality of angularly disposed passageways formed therethrough and intersecting said axial bore;
b. an inner sleeve having a central bore and a threaded outer circumferential surface, wherein said body is received within said central bore;
c. a plurality of jaws slidably received in respective said angularly disposed passageways, each of said jaws having a jaw face formed on one side thereof;
d. an annular nut in driving engagement with said plurality of jaws, wherein said annular nut defines a threaded interior surface and is received about and threadedly engages said outer surface of said inner sleeve so that relative rotation between said inner sleeve and said annular nut moves said annular nut and said inner sleeve axially with respect to each other;
e. a spring disposed between said annular nut and said inner sleeve, said spring biasing against relative rotation between said annular nut and said inner sleeve;
and
f. an outer gripping sleeve, wherein said outer gripping sleeve is disposed rotatably about said annular nut.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/364,573Filed 11 Feb 2003 · continuation
Priority: 10 Mar 2000
Published: US 2003/0127809 A110 Jul 2003
Granted: 18 Nov 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

B23B 31/1253
Moving obliquely to the axis of the chuck in a plane containing this axis: jaws movement actuated by an axially movable member
B23B 31/1215
Moving obliquely to the axis of the chuck in a plane containing this axis: details of the jaws
B23B 31/123
Moving obliquely to the axis of the chuck in a plane containing this axis: with locking arrangements
B23B 31/1238
Moving obliquely to the axis of the chuck in a plane containing this axis: jaws movement actuated by a nut with conical screw-thread

Family

Application09/523,426Parent of this continuation · filed 10 Mar 2000
Application10/172,694Parent of this continuation · filed 14 Jun 2002
US 2003/0127809 A1Pre-grant publication · published 10 Jul 2003
US 6,540,236 B2Parent of this continuation
US 6,428,018 B1Parent of this continuation
US 2002/0180164 A1Published application
US 6,648,342 B2This patent

From the US filing history. Foreign family members aren’t listed.