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US7284761: Bit stop for drill chuck


Filing Information

Inventor(s) Robert S. Gehret ·
Assignee(s) Black & Decker Inc. ·
Attorney/Agent(s) Harness, Dickey & Pierce, P.L.C. ·
Primary Examiner Erica Cadugan ·
Application Number US11343846
Filing date 01/31/2006
Issue date 10/23/2007
Prior Publication Data
Predicted expiration date 01/31/2026
U.S. Classifications 279/62  · 279/902  · 279/156  · 279/123  ·
International Classifications B23B3112  · B23B31167  ·
Kind CodeB2
This application claims the benefit of U.S. Provisional Application No. 60/649,744, filed on Feb. 3, 2005, the disclosure of which is incorporated herein by reference.
4 Claims, 2 Drawings


A tool bit stop located on an inner surface of a clamping jaw of a drill chuck. The tool bit stop is located a distance from a jaw gripping surface of the clamping jaw. The tool bit stop is adapted to provide a surface to register an end of a tool bit in a consistent location relative to the jaw gripping surface. The tool bit stop is shaped to allow advancement and retraction of the clamping jaws without interference from the tool bit stop.

Independent Claims | See all claims (4)

  1. 1. A drill chuck comprising: a chuck core including a plurality of jaw chambers; a plurality of clamping jaws adjustably received in said plurality of jaw chambers, said clamping jaws including an inner surface facing an axis of rotation of said chuck core, said clamping jaws including a first end having a jaw gripping surface on said inner surface; and a tool bit stop fixedly attached to one of said clamping jaws and extending generally radially inward from said inner surface of said one of said clamping jaws, said tool bit stop located between said jaw gripping surface and a second end of said clamping jaw, said tool bit stop intersecting said axis of rotation of said chuck core, wherein said tool bit stop is comprised of a flexible material capable of being overridden by folding back when a tool bit is urged past said tool bit stop.

References Cited

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Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
* cited by examiner

Referenced By

The current document is not referenced by other documents.