Patents by Inventor D. Clayton Evans

D. Clayton Evans has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Iron-type golf club head having movable weights
    Patent number: 8246487
    Abstract: An iron-type golf club head is disclosed herein. The iron-type golf club head has multiple movable mass members which allow for the center of gravity to be moved at least 0.170 inch in a feel to toe direction and 0.070 inch in a crown to sole direction. Each of the movable mass members is preferably composed of a material having a density ranging from 12 g/cm3 and 14 g/cm3.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: August 21, 2012
    Assignee: Callaway Golf Company
    Inventors: Matthew T. Cackett, William C. Watson, D. Clayton Evans, Alan Hocknell
  • Golf club head with improved aerodynamic characteristics
    Patent number: 8241142
    Abstract: Methods of forming a golf club head having improved aerodynamic characteristics are disclosed herein. A preferred method is the largest tangent circle method, which utilizes a Cartesian coordinate system. The method results in identification and measurement of certain club head features, which can be adjusted to improve aerodynamic properties of the golf club head. One method of the present invention lowers the drag of the club head by specifying dimensional relationships of the driver head based on location of apex and nadir points, while another method lowers the drag of the club head by improving overall face design.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 14, 2012
    Assignee: Callaway Golf Company
    Inventors: D. Clayton Evans, Evan D. Gibbs, Matthew T. Cackett, Steven M. Ehlers
  • Interchangeable shaft for a golf club
    Patent number: 8235840
    Abstract: A golf club (20) having a club head (22) with an interchangeable shaft (40) is disclosed herein. The golf club (20) includes a tube (44, 144) mounted in the club head (22), and a sleeve (46, 146) mounted on a tip end (50) of the shaft (40). The tube (44, 144) includes a tapered portion (60, 160) and a rotation prevention portion (62, 162). The sleeve (46, 146) has a frustoconical portion (72, 172) and a keyed portion (74, 174) that are respectively received in the tapered portion (60, 160) and the rotation prevention portion (62, 162) of the tube (44, 144). The golf club (20) further includes a mechanical fastener (48, 148) for removably securing the shaft (40) to the club head (22).
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: August 7, 2012
    Assignee: Callaway Golf Company
    Inventors: Alan Hocknell, Matthew T. Cackett, Denver Holt, D. Clayton Evans, Daniel M. Stevens, James C. Wenck, Steven S. Ogg, Konrad Lenhof, Jerry V. Blanke, Joel B. Erickson, Broadus Perry Wall, Jr.
  • VARIABLE LENGTH GOLF CLUB SHAFT
    Publication number: 20120184389
    Abstract: A variable length shaft assembly comprising at least one upper shaft portion, a lower shaft portion and a threaded fastener, wherein the threaded fastener removably connects the upper shaft portion to the lower shaft portion, is disclosed herein. The variable length shaft assembly may further comprise at least two upper shaft portions having different lengths so a golfer can adjust the total length of the shaft by removing one upper shaft portion and replacing it with another upper shaft portion having a different length. Methods of adjusting the length of a golf club shaft without damaging any portion of the shaft and variable length shaft kits are also disclosed herein.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 19, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: D. CLAYTON EVANS, TIM GOUDARZI, MATTHEW T. CACKETT
  • Wood-type golf club head with adjustable sole contour
    Patent number: 8221258
    Abstract: A wood-type golf club head with an adjustable keel zone member is disclosed herein. The golf club head includes a body and an adjustable keel zone member. The body has a front portion, a crown portion and a sole portion. The body also having a heel end, a toe end and an aft end. The sole portion has only a single keel point. The adjustable keel zone member is disposed within a keel zone of the sole and located preferentially with respect to the center of gravity. The keel zone member is capable of adjusting the face angle of the wood-type golf club head.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: July 17, 2012
    Assignee: Callaway Golf Company
    Inventors: Matthew T. Cackett, D. Clayton Evans, Alan Hocknell
  • VARIABLE LENGTH GOLF CLUB SHAFT
    Publication number: 20120149485
    Abstract: A variable length shaft assembly comprising at least one upper shaft portion, a lower shaft portion and a threaded fastener, wherein the threaded fastener removably connects the upper shaft portion to the lower shaft portion, is disclosed herein. The variable length shaft assembly may further comprise at least two upper shaft portions having different lengths so a golfer can adjust the total length of the shaft by removing one upper shaft portion and replacing it with another upper shaft portion having a different length. Methods of adjusting the length of a golf club shaft without damaging any portion of the shaft and variable length shaft kits are also disclosed herein.
    Type: Application
    Filed: May 3, 2011
    Publication date: June 14, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: D. CLAYTON EVANS, TIM GOUDARZI, MATTHEW T. CACKETT
  • VARIABLE LENGTH GOLF CLUB SHAFT
    Publication number: 20120149487
    Abstract: A variable length shaft assembly comprising at least one upper shaft portion, a lower shaft portion and a threaded fastener, wherein the threaded fastener removably connects the upper shaft portion to the lower shaft portion, is disclosed herein. The variable length shaft assembly may further comprise at least two upper shaft portions having different lengths so a golfer can adjust the total length of the shaft by removing one upper shaft portion and replacing it with another upper shaft portion having a different length. Methods of adjusting the length of a golf club shaft without damaging any portion of the shaft and variable length shaft kits are also disclosed herein.
    Type: Application
    Filed: March 1, 2011
    Publication date: June 14, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: D. CLAYTON EVANS, TIM GOUDARZI, MATTHEW T. CACKETT
  • GOLF CLUB WITH REMOVABLE COMPONENTS
    Publication number: 20120142446
    Abstract: A golf club having removable components includes a club head, a shaft, and a connection assembly. The club head includes a hosel having an upper treaded portion and a lower portion with a faceted cross-section. The connection assembly includes a sleeve mounted on the tip end of the shaft and a screw-cap. The sleeve, which has an aperture for receiving the tip end of the shaft, includes a lower section that has a multi-faceted surface for engaging the lower portion of the hosel. The screw-cap is mounted over the sleeve and includes a body having an upper area and a threaded area, the latter of which is capable of engaging the upper threaded portion of the hosel to removably secure the shaft to the club head.
    Type: Application
    Filed: February 13, 2012
    Publication date: June 7, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: D. Clayton Evans, Matthew T. Cackett
  • GOLF CLUB HEAD WITH IMPROVED AERODYNAMIC CHARACTERISTICS
    Publication number: 20120129626
    Abstract: Methods of forming a golf club head having improved aerodynamic characteristics are disclosed herein. A preferred method is the largest tangent circle method, which utilizes a Cartesian coordinate system. The method results in identification and measurement of certain club head features, which can be adjusted to improve aerodynamic properties of the golf club head. One method of the present invention lowers the drag of the club head by specifying dimensional relationships of the driver head based on location of apex and nadir points, while another method lowers the drag of the club head by improving overall face design.
    Type: Application
    Filed: January 24, 2012
    Publication date: May 24, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: D. Clayton EVANS, Evan D. GIBBS, Matthew T. CACKETT, Steven M. EHLERS
  • WOOD-TYPE GOLF CLUB HEAD WITH ADJUSTABLE SOLE CONTOUR
    Publication number: 20120122603
    Abstract: A wood-type golf club head with an adjustable keel zone member is disclosed herein. The golf club head includes a body and an adjustable keel zone member. The body has a front portion, a crown portion and a sole portion. The body also having a heel end, a toe end and an aft end. The sole portion has only a single keel point. The adjustable keel zone member is disposed within a keel zone of the sole and located preferentially with respect to the center of gravity. The keel zone member is capable of adjusting the face angle of the wood-type golf club head.
    Type: Application
    Filed: January 23, 2012
    Publication date: May 17, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventors: MATTHEW T. CACKETT, D. CLAYTON EVANS, ALAN HOCKNELL
  • Golf club with removable components
    Patent number: 8167735
    Abstract: A golf club having removable components includes a club head, a shaft, and a connection assembly. The club head includes a hosel having an upper treaded portion and a lower portion with a faceted cross-section. The connection assembly includes a sleeve mounted on the tip end of the shaft and a screw-cap. The sleeve, which has an aperture for receiving the tip end of the shaft, includes a lower section that has a multi-faceted surface for engaging the lower portion of the hosel. The screw-cap is mounted over the sleeve and includes a body having an upper area and a threaded area, the latter of which is capable of engaging the upper threaded portion of the hosel to removably secure the shaft to the club head.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: May 1, 2012
    Assignee: Callaway Golf Company
    Inventors: D. Clayton Evans, Matthew T. Cackett
  • GOLF CLUB HEAD WITH ADJUSTABLE WEIGHTING
    Publication number: 20120064991
    Abstract: A titanium bodied driver that utilizes a lightweight receiving back cap, which is designed to be non-removable from the club head but can be loosened to allow its interior to be accessed to reposition one or more movable weights into alternative receiving locations, is disclosed herein. The back cap may also be designed to be completely removable from the driver body to gain access to the one or more weights that can be re-positioned in alternative receiving areas within the back cap's interior.
    Type: Application
    Filed: August 29, 2011
    Publication date: March 15, 2012
    Applicant: CALLAWAY GOLF COMPANY
    Inventor: D. CLAYTON EVANS
  • Golf club hosel
    Patent number: D660391
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: May 22, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D660392
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: May 22, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D661758
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 12, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D662162
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 19, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D662163
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 19, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D662998
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: July 3, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D666263
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: August 28, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans
  • Golf club hosel
    Patent number: D666264
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: August 28, 2012
    Assignee: Callaway Golf Company
    Inventors: Steven M. Ehlers, D. Clayton Evans