Patents by Inventor Nathaniel J. Radcliffe

Nathaniel J. Radcliffe 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).

  • Golf club head
    Patent number: 8795100
    Abstract: A hollow golf club head includes a sole, a crown, a skirt, and a striking face. The golf club includes a junction interconnecting the sole, crown, and skirt to the striking face, the junction including at least one stiffening member.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: August 5, 2014
    Assignee: SRI Sports Limited
    Inventors: Robert J. Horacek, Nathaniel J. Radcliffe, John J. Rae, Michael J. Wallans, Sam G. Lacey
  • GOLF CLUB HEAD
    Publication number: 20140206475
    Abstract: A golf club head according to one or more aspects of the present invention may include a face portion or strike-face wall comprising a top inner boundary, an intermediate inner boundary, and a bottom inner boundary having a bottom-inner-boundary toe portion and a bottom-inner-boundary heel portion. The strike-face wall may further include a first uniform-thickness region, adjoining the top inner boundary, and a variable-thickness region adjoining the uniform-thickness region and a majority of the bottom inner boundary. In another example, the variable-thickness may adjoin a majority of the top inner boundary and the uniform-thickness region may adjoin a majority of the bottom inner boundary.
    Type: Application
    Filed: March 21, 2014
    Publication date: July 24, 2014
    Applicant: SRI Sports Limited
    Inventors: Jeff D. BRUNSKI, Samuel G. LACEY, Dan S. NIVANH, Nathaniel J. RADCLIFFE, John J. RAE, Mark BLUMENKRANTZ, Rory C. STEWART, Michael J. WALLANS
  • Golf club
    Patent number: 8784231
    Abstract: A golf club according to one or more aspects of the present invention may have a mass less than 300 g, a length greater than about 45 inches, a swing weight between D0 and D6, a head weighing less than about 200 g, a club-head volume of at least about 360 cm3, a grip weighing less than about 50 g, and a shaft having a tip end, a butt end, and a shaft balance point located no more than 24 inches from the butt end. The shaft may have a torsional displacement angle greater than about 5.5° and a mass less than about 50 g. A coordinate system having x-, y-, and z-axes may have its origin at the center of gravity of the club head. The golf club head may have a moment of inertia of at least about 4500 g·cm2 about the z-axis and a moment of inertia of at least about 3000 g·cm2 about the y-axis.
    Type: Grant
    Filed: July 3, 2012
    Date of Patent: July 22, 2014
    Assignee: SRI Sports Limited
    Inventors: Dustin J. Brekke, Jeff D. Brunski, Matthew R. Daraskavich, Samuel G. Lacey, Nathaniel J. Radcliffe, Brian D. Schielke
  • Golf club head with a body-conforming weight member
    Patent number: 8784234
    Abstract: A golf club head includes a main body having a top portion, a bottom portion, a striking face, and an interior surface. A weight member is coupled to the interior surface of the main body. In an imaginary vertical plane that passes through the weight member, the interior surface of the main body comprises a first point and a second point. An imaginary line passes through the first point and the second point. A first imaginary boundary line and a second imaginary boundary line, both passing through the weight member and being perpendicular to the imaginary line, pass through the first point and the second point, respectively. Between the first point and the second point, the interior surface of the main body has an irregularity factor of at least 1.2 and the weight member comprises a distribution factor of at most 1.0 and a conformity factor of at most 0.07.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: July 22, 2014
    Assignee: SRI Sports Limited
    Inventors: Sam G. Lacey, Dan S. Nivanh, Nathaniel J. Radcliffe, Dustin J. Brekke
  • Golf club head
    Patent number: 8753229
    Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: June 17, 2014
    Assignee: SRI Sports Limited
    Inventors: John J. Rae, Nathaniel J. Radcliffe, Daniel J. Stone, Trent E. Garner, Brad S. Hooley, Robert J. Horacek, Sam G. Lacey, Jeff D. Brunski, Kevin Schaeffer, Scott A. Carlyle, Stephen C. Chien, Craig R. Schnell, Douglas E. Roberts, Dan S. Nivanh, Michael J. Wallans
  • Golf club head
    Patent number: 8740723
    Abstract: A golf club head includes a striking face having a face center, a bottom portion, a top portion including an exterior surface, a hosel including an imaginary vertical hosel plane, a forwardmost point, and a rearwardmost point. In an imaginary vertical plane perpendicular to the hosel plane and passing through the face center, the exterior surface includes a path having a first point and a second point rearward of the first point. An imaginary infinite straight line passes through the first point and the second point, but does not penetrate the exterior surface. A segment of the imaginary straight line is delimited by the first point and the second point. A maximum distance between the segment and the exterior surface of the top portion is no greater than 0.70 mm and a distance between the first point and the second point is no less than 22 mm.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: June 3, 2014
    Assignee: SRI Sports Limited
    Inventors: Jimmy H. Kuan, Samuel G. Lacey, Dan S. Nivanh, Nathaniel J. Radcliffe
  • Golf club head
    Patent number: 8715107
    Abstract: A golf club head according to one or more aspects of the present invention may include a face portion or strike-face wall comprising a top inner boundary, an intermediate inner boundary, and a bottom inner boundary having a bottom-inner-boundary toe portion and a bottom-inner-boundary heel portion. The strike-face wall may further include a first uniform-thickness region, adjoining the top inner boundary, and a variable-thickness region adjoining the uniform-thickness region and a majority of the bottom inner boundary. In another example, the variable-thickness may adjoin a majority of the top inner boundary and the uniform-thickness region may adjoin a majority of the bottom inner boundary.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: May 6, 2014
    Assignee: SRI Sports Limited
    Inventors: Jeff D. Brunski, Samuel G. Lacey, Dan S. Nivanh, Nathaniel J. Radcliffe, John J. Rae, Mark Blumenkrantz, Rory C. Stewart, Michael J. Wallans
  • GOLF CLUB HEAD
    Publication number: 20140113744
    Abstract: A golf club head includes a striking face having a face center, a bottom portion, a top portion including an exterior surface, a hosel including an imaginary vertical hosel plane, a forwardmost point, and a rearwardmost point. In an imaginary vertical plane perpendicular to the hosel plane and passing through the face center, the exterior surface includes a path having a first point and a second point rearward of the first point. An imaginary infinite straight line passes through the first point and the second point, but does not penetrate the exterior surface. A segment of the imaginary straight line is delimited by the first point and the second point. A maximum distance between the segment and the exterior surface of the top portion is no greater than 0.70 mm and a distance between the first point and the second point is no less than 22 mm.
    Type: Application
    Filed: December 27, 2013
    Publication date: April 24, 2014
    Applicant: SRI SPORTS LIMITED
    Inventors: Jimmy H. KUAN, Samuel G. LACEY, Dan S. NIVANH, Nathaniel J. RADCLIFFE
  • Golf club head
    Patent number: 8641557
    Abstract: A golf club head includes a striking face having a face center, a bottom portion, a top portion including an exterior surface, a hosel including an imaginary vertical hosel plane, a forwardmost point, and a rearwardmost point. In an imaginary vertical plane perpendicular to the hosel plane and passing through the face center, the exterior surface includes a path having a first point and a second point rearward of the first point. An imaginary infinite straight line passes through the first point and the second point, but does not penetrate the exterior surface. A segment of the imaginary straight line is delimited by the first point and the second point. A maximum distance between the segment and the exterior surface of the top portion is no greater than 0.70 mm and a distance between the first point and the second point is no less than 22 mm.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: February 4, 2014
    Assignee: SRI Sports Limited
    Inventors: Jimmy H. Kuan, Samuel G. Lacey, Dan S. Nivanh, Nathaniel J. Radcliffe
  • Golf Club
    Publication number: 20140011604
    Abstract: A golf club according to one or more aspects of the present invention may have a mass less than 300 g, a length greater than about 45 inches, a swing weight between D0 and D6, a head weighing less than about 200 g, a club-head volume of at least about 360 cm3, a grip weighing less than about 50 g, and a shaft having a tip end, a butt end, and a shaft balance point located no more than 24 inches from the butt end. The shaft may have a torsional displacement angle greater than about 5.5° and a mass less than about 50 g. A coordinate system having x-, y-, and z-axes may have its origin at the center of gravity of the club head. The golf club head may have a moment of inertia of at least about 4500 g·cm2 about the z-axis and a moment of inertia of at least about 3000 g·cm2 about the y-axis.
    Type: Application
    Filed: July 3, 2012
    Publication date: January 9, 2014
    Applicant: SRI SPORTS LIMITED
    Inventors: Dustin J. Brekke, Jeff D. Brunski, Matthew R. Daraskavich, Samuel G. Lacey, Nathaniel J. Radcliffe, Brian D. Schielke
  • SHAFT FITTING SYSTEM
    Publication number: 20130331200
    Abstract: A method of selecting a preferred golf shaft for a player who uses an existing golf shaft, according to one or more aspects of the present invention, may comprise gathering a plurality of empirical data sets, each data set corresponding to an individual golf shaft selected from a plurality of golf shafts; providing a plurality of specification codes, each associated with an individual empirical data set of the plurality of empirical data sets; from the plurality of specification codes, identifying a first specification code associated with the existing golf shaft; gathering feedback associated with the existing golf shaft from the player; and using the feedback to select, from the plurality of specification codes, a second specification code corresponding to the preferred golf shaft.
    Type: Application
    Filed: August 14, 2013
    Publication date: December 12, 2013
    Applicant: SRI SPORTS LIMITED
    Inventors: Dustin J. BREKKE, Matthew R. DARASKAVICH, Nathaniel J. RADCLIFFE
  • GOLF CLUB HEAD
    Publication number: 20130324292
    Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.
    Type: Application
    Filed: August 9, 2013
    Publication date: December 5, 2013
    Applicant: SRI SPORTS LIMITED
    Inventors: John J. RAE, Nathaniel J. RADCLIFFE, Daniel J. STONE, Trent E. GARNER, Brad S. HOOLEY, Robert J. HORACEK, Sam G. LACEY, Jeff D. BRUNSKI, Kevin SCHAEFFER, Scott A. CARLYLE, Stephen C. CHIEN, Craig R. SCHNELL, Douglas E. ROBERTS, Dan S. NIVANH, Michael J. WALLANS
  • GOLF CLUB HEAD
    Publication number: 20130281228
    Abstract: A hollow golf club head includes a sole, a crown, a skirt, and a striking face. The golf club includes a junction interconnecting the sole, crown, and skirt to the striking face, the junction including at least one stiffening member.
    Type: Application
    Filed: May 17, 2013
    Publication date: October 24, 2013
    Applicant: SRI SPORTS LIMITED
    Inventors: Robert J. HORACEK, Nathaniel J. RADCLIFFE, John J. RAE, Michael J. WALLANS, Sam G. LACEY
  • Shaft fitting system
    Patent number: 8535174
    Abstract: A method of selecting a preferred golf shaft for a player who uses an existing golf shaft, according to one or more aspects of the present invention, may comprise gathering a plurality of empirical data sets, each data set corresponding to an individual golf shaft selected from a plurality of golf shafts; providing a plurality of specification codes, each associated with an individual empirical data set of the plurality of empirical data sets; from the plurality of specification codes, identifying a first specification code associated with the existing golf shaft; gathering feedback associated with the existing golf shaft from the player; and using the feedback to select, from the plurality of specification codes, a second specification code corresponding to the preferred golf shaft.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: September 17, 2013
    Assignee: SRI Sports Limited
    Inventors: Dustin J. Brekke, Matthew R. Daraskavich, Nathaniel J. Radcliffe
  • Golf club head
    Patent number: 8529369
    Abstract: An exemplary golf club head having an increased amount of discretionary mass may be realized by utilizing improved drop angles, an improved average crown height, and/or articulation points. The discretionary mass may be placed low and deep in the club head to improve the location of the center of gravity as well as the inertial properties. A preferred break length may also be utilized to further improve the depth of the center of gravity. In one example, the center of gravity may be positioned to substantially align the sweet spot with the face center of the club head.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: September 10, 2013
    Assignee: SRI Sports Limited
    Inventors: John J. Rae, Nathaniel J. Radcliffe, Daniel J. Stone, Trent E. Garner, Brad S. Hooley, Robert J. Horacek, Sam G. Lacey, Jeff D. Brunski, Kevin Schaeffer, Scott A. Carlyle, Stephen C. Chien, Craig R. Schnell, Douglas E. Roberts, Dan S. Nivanh, Michael J. Wallans
  • GOLF CLUB HEAD
    Publication number: 20130210543
    Abstract: A golf club head is manufactured so as to be at least partially composed of martensitic stainless steel and to have an exterior surface. At least one chromium layer is deposited on at least a portion of the exterior surface of the golf club head. At least one outer layer is deposited by physical vapor deposition on at least a portion of the at least one chromium layer, the outer layer including a metal and a nonmetal.
    Type: Application
    Filed: February 9, 2012
    Publication date: August 15, 2013
    Applicant: SRI SPORTS LIMITED
    Inventors: Nathaniel J. RADCLIFFE, Manny WANG, Samuel G. LACEY
  • Golf club head
    Patent number: 8465380
    Abstract: A hollow golf club head includes a sole, a crown, a skirt, and a striking face. The golf club includes a junction interconnecting the sole, crown, and skirt to the striking face, the junction including at least one stiffening member.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: June 18, 2013
    Assignee: SRI Sports Limited
    Inventors: Robert J. Horacek, Nathaniel J. Radcliffe, John J. Rae, Michael J. Wallans, Sam G. Lacey
  • Muscle-back, with insert, iron type golf club head
    Patent number: 8419568
    Abstract: A muscle-back iron golf club head includes a blade-like upper mass, a muscle-like lower mass, a planar front surface, a top surface, a sole surface, a heel surface, a toe surface, and a rear surface having a first contour. A recess is in the rear surface, the recess having a first portion in the blade-like upper mass and a second portion in the muscle-like lower mass. An insert may be provided in the recess, and such insert may substantially fill the recess and may include a back surface having a second contour which is different from the first contour of the club head rear surface.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: April 16, 2013
    Assignee: SRI Sports Limited
    Inventors: Douglas E. Roberts, Trent E. Garner, Kevin A. Wolfe, Daniel J. Stone, Christopher J. Beck, Todd D. Harman, Brent L. Newsome, Michael J. Wallans, Nathaniel J. Radcliffe
  • Golf club head
    Patent number: D691683
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: October 15, 2013
    Assignee: Dunlop Sports Co. Ltd.
    Inventors: Dan Nivanh, Nathaniel J. Radcliffe, Nick Trahan
  • Golf club head
    Patent number: D692078
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: October 22, 2013
    Assignee: Dunlop Sports Co. Ltd.
    Inventors: Dan Nivanh, Nathaniel J. Radcliffe, Nick Trahan