Chucks or sockets – Socket type – Obliquely guided reciprocating jaws
Reexamination Certificate
2000-03-10
2002-03-12
Bishop, Steven C. (Department: 3722)
Chucks or sockets
Socket type
Obliquely guided reciprocating jaws
C279S066000, C279S123000, C279S902000
Reexamination Certificate
active
06354605
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates generally to chucks for use with drills or with electric or pneumatic power drivers. More particularly, the present invention relates to a chuck of the keyless type which may be tightened or loosened by hand or by actuation of the driver motor.
Both hand and electric or pneumatic tool drivers are well-known. Although twist drills are the most common tools used with such drivers, the tools may also comprise screwdrivers, nut drivers, burrs, mounted grinding stones, and other cutting or abrading tools. Since the tools may have shanks of varying diameter or may have a polygonal cross-section, the device is usually provided with a chuck that is adjustable over a relatively wide range. The chuck may be attached to the driver by a threaded or tapered bore.
A wide variety of chucks have been developed in the art. In one form of chuck, three jaws spaced circumferentially approximately 120° apart from each other are constrained by angularly disposed passageways in a body attached to the driveshaft. The chuck is configured so that rotation of the body in one direction with respect to a constrained nut forces the jaws into or away from gripping relationship with a tool shank. Such a chuck may be keyless if it can be tightened or loosened by manual rotation. Examples of such chucks are disclosed in U.S. Pat. Nos. 5,125,673 and 5,193,824, commonly assigned to the present assignee and the entire disclosures of which are incorporated by reference herein. Various configurations of keyless chucks are known in the art and are desirable for a variety of applications.
FIG. 2
illustrates, in cross-section, a typical chuck jaw construction in which each of three jaws
200
includes a back surface
202
and an opposing tool-engaging surface formed by a ridge
204
disposed generally parallel to the chuck axis. Two generally planar side surfaces
206
extend from ridge
204
to the back surface. The side surfaces on each jaw
200
define a 120° angle &dgr; extending through the jaw. Thus, each side surface on a jaw
200
is parallel to a side surface of an adjacent jaw. When the chuck is moved to its fully closed position as shown in
FIG. 2
, the jaw side surfaces abut each other.
Other tool-engaging surfaces are known. For example, the tool-engaging surface may be formed by an inner ridge parallel to the chuck axis and two outer ridges parallel to the inner ridge. A pair of respective troughs sit between the inner ridge and the outer ridges so that the jaw's cross-section is in the shape of a W. Generally, side surfaces that extend from the outer ridges to the jaw's back surface define a 120° angle between them through the jaw so that each side surface is parallel to the side surface of its adjacent jaw.
SUMMARY OF THE INVENTION
The present invention recognizes and addresses disadvantages of prior art construction and methods.
Accordingly, it is an object of the present invention to provide an improved chuck for use with a powered driver.
This and other objects are achieved by a chuck for use with a manual or powered driver having a rotatable drive shaft. The chuck includes a generally cylindrical body having a nose section and a tail section. The tail section is configured to rotate with the drive shaft, and the nose section has an axial bore formed therein. A plurality of jaws are moveably disposed with respect to the body to and away from the axial bore. Each jaw includes a tool engaging surface facing, and generally parallel to the axis of, the axial bore. The jaw includes a back surface opposite the tool engaging surface and a pair of planar side surfaces extending from the tool engaging surface toward the back surface. The side surfaces are disposed on either side of a plane that includes the chuck axis and define an angle through the jaw between the side surfaces that is greater than
3600
divided by the number of jaws.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one or more embodiments of the invention and, together with the description, serve to explain the principles of the invention.
REFERENCES:
patent: 247035 (1881-09-01), Gage
patent: 725273 (1903-04-01), McDonough
patent: 1011975 (1911-12-01), Lewis
patent: 1059234 (1913-04-01), Taylor
patent: 1894515 (1933-01-01), Hubbell
patent: 1898264 (1933-02-01), Proefke
patent: 1924301 (1933-08-01), Benford
patent: 2546351 (1951-03-01), Stoner
patent: 2615721 (1952-10-01), Gridley
patent: 3795406 (1974-03-01), Rohm
patent: 3927892 (1975-12-01), Pradota
patent: 4088333 (1978-05-01), Nobile et al.
patent: 4121848 (1978-10-01), Morawski
patent: 4284285 (1981-08-01), Futter
patent: 4323324 (1982-04-01), Eberhardt
patent: 4386879 (1983-06-01), Martinmaas
patent: 4536109 (1985-08-01), Hunger et al.
patent: 4616538 (1986-10-01), Hessbruggen
patent: 4630836 (1986-12-01), Hunger et al.
patent: 4664568 (1987-05-01), Rohm
patent: 4690226 (1987-09-01), Schnizler et al.
patent: 4726719 (1988-02-01), Mack
patent: 4752165 (1988-06-01), Wanner
patent: 4840387 (1989-06-01), McCarthy
patent: 4840519 (1989-06-01), Kleine
patent: 4848779 (1989-07-01), Wheeler et al.
patent: 4856797 (1989-08-01), Rall
patent: 4913449 (1990-04-01), Rohm
patent: 4951955 (1990-08-01), Sakamaki
patent: 4991860 (1991-02-01), Rohm
patent: 5011167 (1991-04-01), Jordan
patent: 5141239 (1992-08-01), Clay
patent: 5195760 (1993-03-01), Wheeler et al.
patent: 5286041 (1994-02-01), Rohm
patent: 5340128 (1994-08-01), Weiss et al.
patent: 5464231 (1995-11-01), Clay
patent: 5553873 (1996-09-01), Salpaka et al.
patent: 5580197 (1996-12-01), Rohm
patent: 5816584 (1998-10-01), Miles et al.
patent: 6022029 (2000-02-01), Sakamaki
patent: 508937 (1955-01-01), None
patent: 3331866 (1985-03-01), None
patent: 3344552 (1985-06-01), None
patent: 3438595 (1986-04-01), None
patent: 0059030 (1982-09-01), None
patent: 2214455 (1989-09-01), None
patent: 63207504 (1988-08-01), None
patent: 1227360 (1986-04-01), None
Bishop Steven C.
Nelson Mullins Riley & Scarborough LLP
Power Tool Holders Incorporated
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