# US 5,701,779 A · Chuck having formed jaws > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,701,779 A - Document ID: US5701779A - Status: Granted - Kind: A - Application number: 08/409,493 - Filed: 1995-03-23 - Granted: 1997-12-30 - Earliest claimed: 1995-03-23 - Assignees: Power Tool Holders Incorporated - Inventors: E. Russell Carter - Web page: https://patentgrep.com/patent/US5701779A ## CPC - B23B 31/1215: {Details of the jaws} - B23B 31/1238: {Jaws movement actuated by a nut with conical screw-thread} - B23B 2231/38: Keyless chucks for hand tools - B23B 2231/44: Nose pieces - Y10T 279/17615: Obliquely guided reciprocating jaws - Y10T 279/17632: Conical sleeve - Y10T 279/1986: Jaws - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A chuck for use with a manual or powered driver including a nut rotatably mounted on the chuck body and in engagement with the threads of the chuck jaws. Aspects of the chuck Jaws, such as the jaw face, are manipulatively formed by selective redistribution of metal. Formation of the chuck jaws in this manner is distinguishable from jaws formed by prior art machining techniques due to the structural orientation of grain in the metal. Forming of the chuck jaws preferably occurs at low applied temperature, i.e. not exceeding 1000 degrees Fahrenheit. ## Claims ### Claim 1 A method of making a jaw member for use with a chuck of the type utilized with a manual or powered driver having a rotatable drive shaft, said method comprising the steps of: (a) providing a blank of a selected material, said blank generally configured as a cylinder of a first predetermined length; (b) manipulatively forming by selective redistribution of material said blank into an intermediate configuration having a second predetermined length greater than said first predetermined length, said intermediate configuration having a generally cylindrical shank portion integrally extending into a tapered portion, said tapered portion having a third predetermined length and a diameter decreasing in the direction of a first end from a maximum diameter at an intermediate location on said blank adjacent said shank portion; and (c) manipulatively forming by selective redistribution of material said tapered portion of said intermediate configuration into a bite portion having a generally oblique surface defining thereon a jaw face, thereby producing a jaw member having a shank portion and a bite portion. ### Claim 2 (depends on 1) A method of making a jaw member as set forth in claim 1, wherein said bite portion has substantially said third predetermined length and further has a cross-sectional area at axial locations therealong substantially equivalent to the cross-sectional area of said tapered portion at corresponding axial locations. ### Claim 3 (depends on 1) A method of making a jaw member as set forth in claim 1, wherein said tapered portion of said intermediate configuration is characterized by a bullet-shaped nonlinear taper. ### Claim 4 (depends on 1) A method of making a jaw member as set forth in claim 1, further comprising between steps (a) and (b) the step of manipulatively forming by selective redistribution of material a circumferential chamfer at said first end of said blank, said chamfer defining a first end face having a predetermined diameter. ### Claim 5 (depends on 4) A method of making a jaw member as set forth in claim 4, wherein said tapered portion is formed in step (b) to taper to a minimum diameter substantially equivalent to said predetermined diameter at said first end of said blank. ### Claim 6 (depends on 1) A method of making a jaw member as set forth in claim 1, further comprising the step of manipulatively reducing a diameter of said shank portion to a second predetermined diameter by selective redistribution of material. ### Claim 7 (depends on 1) A method of making a jaw member as set forth in claim 1, wherein said blank is not heated to a temperature exceeding generally 1000 degrees Fahrenheit during manipulative forming thereof. ### Claim 8 (depends on 1) A method of making a jaw member as set forth in claim 1, wherein said steps are performed in respective discrete stages. ### Claim 9 (depends on 1) A method of making a jaw member as set forth in claim 1, further comprising the step of defining threads on an outer surface of said shank portion to produce a chuck jaw. ### Claim 10 A method of making a jaw member for use with a chuck of the type utilized with a manual or powered driver having a rotatable drive shaft, said method comprising the steps of: (a) providing a cylindrical blank of a selected material; (b) manipulatively forming by selective redistribution of material a circumferential chamfer at a first end of said blank; (c) manipulatively forming by selective redistribution of material said blank into an intermediate configuration having a generally cylindrical shank portion integrally extending into a tapered portion, said tapered portion having a maximum diameter at an intermediate location on said blank and a minimum diameter at said first end of said blank; (d) manipulatively forming by selective redistribution of material said tapered portion of said intermediate configuration into a bite portion having a generally oblique surface defining thereon a jaw face, said bite portion having a cross-sectional area at axial locations therealong substantially equivalent to a cross-sectional area of said tapered portion at corresponding axial locations; and (e) manipulatively forming by selective redistribution of material an angled end face at a first end of said blank. ### Claim 11 (depends on 10) A method of making a jaw member as set forth in claim 10, wherein said tapered portion of said intermediate configuration is characterized by a bullet-shaped nonlinear taper. ### Claim 12 (depends on 10) A method of making a jaw member as set forth in claim 10, wherein said blank is not heated to a temperature exceeding generally 1000 degrees Fahrenheit during manipulative forming thereof. ### Claim 13 (depends on 10) A method of making a jaw member as set forth in claim 10, wherein said steps are performed in respective discrete stages. ### Claim 14 (depends on 10) A method of making a jaw member as set forth in claim 10, further comprising the step of defining threads on an outer surface of said shank portion to produce a chuck jaw.