Patents by Inventor Richard C. Helmstetter

Richard C. Helmstetter 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).

  • Patent number: 6027416
    Abstract: A golf club head comprising toe and heel portions, a front wall defining a ball-striking face, and top and bottom walls, the bottom wall characterized as having a medial ridge, and as forming two shallow recesses, one recess between the ridge and the heel portion, and the other recess between the ridge and the toe portion, the recesses everywhere spaced rearwardly from the front wall, the one recess having an arcuate peripheral edge generally convex toward the heel portion, and the other recess having an arcuate peripheral edge generally convex toward the toe portion.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: February 22, 2000
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: 6007433
    Abstract: A sole configuration for a golf club head that provides the benefits of a sole configuration incorporating a medial ridge design. The medial ridge divides the sole into a toe and heel section. The sole further comprises a first and a second recess in the toe and heel sections respectively, wherein the first and second recesses are downwardly convex thereby allowing for the center of gravity of the golf club head to be positioned lower than in a golf club head having recesses that are downwardly concave. The first recess has a horizontal concavity that is in an opposite direction from the concavity of the second recess.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: December 28, 1999
    Assignee: Callaway Golf Company
    Inventors: Richard C. Helmstetter, D. Clayton Evans
  • Patent number: 5785605
    Abstract: In combination with a golf club head which comprises a shell having toe and heel portions, a front wall defining a forward facing ball-striking face, and top and bottom walls, the bottom wall characterized as having a medial ridge, the improvement comprising a medial ridge having shallow downward convexity in an upright plane extending forwardly and intersecting the ridge, the ridge having a lowermost local zone, in ball-addressing position of the head, and the head having a center of gravity located in substantially vertical alignment with the local zone.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: July 28, 1998
    Assignee: Callaway Golf Company
    Inventor: Richard C. Helmstetter
  • Patent number: 5776010
    Abstract: An iron type golf club head which comprises a head body having a ball-striking front face, a rear side, a top, a bottom, a toe, and a heel; a recess formed in the head body proximate the head body rear side and bottom; and an inset positioned in the recess; the head body having a weight W.sub.1 and the inset having a weight W.sub.2, and wherein W.sub.2 /(W.sub.1 +W.sub.2) is between about 0.25 and 0.90.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: July 7, 1998
    Assignee: Callaway Golf Company
    Inventors: Richard C. Helmstetter, Thomas R. Hilton, Donald A. Bistline, Victor S. Dennis
  • Patent number: 5755624
    Abstract: A golf club head comprising a shell having toe and heel portions; a front wall defining a forward facing ball-striking face; and top and bottom walls, the bottom wall being metallic and having at least one local zone of relatively greater thickness, remaining extent of the bottom wall having thickness substantially less than the local zone of relatively greater thickness.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: May 26, 1998
    Assignee: Callaway Golf Company
    Inventor: Richard C. Helmstetter
  • Patent number: 5749795
    Abstract: A golf club head having a body defining a heel, toe, top wall, bottom wall, and a front wall defining an upwardly and rearwardly inclined front face and rear face, comprising a body defining a forwardly extending main recess located rearwardly of the front wall; the body also defining an undercut recess located rearwardly of the front wall rear face and extending outwardly from the main recess toward the top wall and toward the bottom wall, proximate the rear face; the head having rearward projection with downward thickening between the top wall and the main recess, and rearwardly of the undercut recess that extends toward the top wall, the undercut recess that extends toward the top wall having forward and rearward sides that extend generally parallel to one another; the rearward projection having a lower surface facing the main recess, the lower surface intersecting the rearward side of the undercut recess at an acute angle.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: May 12, 1998
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: 5704849
    Abstract: A golf club head having a body defining a heel, toe, top wall, sole defining a bottom wall, and a front wall defining an upwardly and rearwardly inclined front face, and comprising the body defining a forwardly extending main recess located rearwardly of the front wall; and the body also defining an undercut recess located directly rearwardly of the front wall and extending outwardly from the main recess toward one or more of the following:i) the top wallii) the bottom walliii) the toeiv) the heel;and structure on said front wall and located forwardly of the main recess for attenuating audible vibration created when a golf ball is struck by the front face. The front wall has a rear side, and the referenced structure on the front wall is attached to the front wall rear side and is everywhere spaced from the undercut recess, the undercut recess openly exposed to the main recess.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: January 6, 1998
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: 5697853
    Abstract: A golf club head comprising toe and heel portions, a front wall defining a ball-striking face, and top and bottom walls, the bottom wall characterized as having a medial ridge, and as forming two shallow recesses, one recess between the ridge and the heel portion, and the other recess between the ridge and the toe portion, the recesses everywhere spaced rearwardly from the front wall, the one recess having an arcuate peripheral edge generally convex toward the heel portion, and the other recess having an arcuate peripheral edge generally convex toward the toe portion.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: December 16, 1997
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: 5626530
    Abstract: A golf club head having a body defining a heel, toe, top wall, sole defining a bottom wall, and a front wall defining an upwardly and rearwardly inclined front face, and comprising a bottom wall having a local bevel located medially of the head and extending rearwardly and upwardly toward the rear wall, there being indicia on the local bevel.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 6, 1997
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: 5611741
    Abstract: A golf club head comprising a shell having toe and heel portions, a rear wall, a front wall defining a ball-striking face, and top and bottom walls, the bottom wall characterized as having a medial ridge, and as forming two dished shallow recesses, one recess between the ridge and the heel portion, and the other recess between the ridge and the toe portion, the recesses spaced rearwardly from the front wall, the one recess having an arcuate peripheral edge generally convex toward the heel portion, and the other recess having an arcuate peripheral edge generally convex toward the toe portion, the recesses being located in substantially mirror imaged positions with respect to a forwardly extending vertical plane bisecting the ridge, the head, when viewed toward the bottom wall, presents a peripheral outline which, at the toe and rear of the head, has substantial spacing from the other dished shallow recess.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: March 18, 1997
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: 5605510
    Abstract: A golf putter for use with a putter shaft supporting a head, the head comprising a putter body having a heel, toe, and sole defining a bottom wall, and a front wall, the body elongated between the heel and toe, and; the body having at least one recess projecting forwardly toward a plane defined by the front wall; and the body having a second recess sunk in the front wall, there being a non-metallic face plate having a periphery received in the second recess and bonded to the body.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: February 25, 1997
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: D383512
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: September 9, 1997
    Assignee: Callaway Golf Company
    Inventors: Glenn H. Schmidt, Richard C. Helmstetter
  • Patent number: D385933
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: November 4, 1997
    Assignee: Callaway Golf Company
    Inventors: Augustin W. Rollinson, Richard C. Helmstetter
  • Patent number: D388851
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: January 6, 1998
    Assignee: Callaway Golf Company
    Inventors: Augustin W. Rollinson, Richard C. Helmstetter
  • Patent number: D393034
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 31, 1998
    Assignee: Callaway Golf Company
    Inventors: Thomas R. Hilton, Richard C. Helmstetter, Donald A. Bistline, Victor S. Dennis, Bruce A. Parker
  • Patent number: D393035
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 31, 1998
    Assignee: Callaway Golf Company
    Inventors: Donald A. Bistline, Richard C. Helmstetter, Thomas R. Hilton, Victor S. Dennis, Bruce A. Parker
  • Patent number: D393036
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 31, 1998
    Assignee: Callaway Golf Company
    Inventors: Richard C. Helmstetter, Donald A. Bistline, Thomas R. Hilton, Victor S. Dennis
  • Patent number: D402343
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: December 8, 1998
    Assignee: Callaway Golf Company
    Inventors: Richard C. Helmstetter, Steven D. Gray, Roger C. Cleveland
  • Patent number: D415808
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: October 26, 1999
    Assignee: Callaway Golf Company
    Inventors: Richard C. Helmstetter, D. Clayton Evans, Roger Cleveland
  • Patent number: D420081
    Type: Grant
    Filed: April 1, 1998
    Date of Patent: February 1, 2000
    Assignee: Callaway Golf Company
    Inventors: Richard C. Helmstetter, D. Clayton Evans, Roger Cleveland, Bret K. C. Larsen