Patents by Inventor Siegfried Kuebler

Siegfried Kuebler 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: 5792011
    Abstract: Associated with a racket for tennis or the like games having a frame for receiving stringing (18, 19) and comprising a profile bar, and a handle end, is at least one receiving space for granules or the like mass particles (34), in particular lead shot, wherein the receiving space (32) is part of an insert (30) which is fitted into a stringing mesh of the stringing (18, 19).
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: August 11, 1998
    Inventor: Siegfried Kuebler
  • Patent number: 5772540
    Abstract: In a racket for tennis or the like games having a frame for receiving stringing, comprising a hollow tube, and a handle end, wherein receiving spaces for granules or the like mass particles are associated with the racket, at least one receiving space (40) is arranged at the outside surface (34) of the tube (14), wherein in particular a recess which is formed in the outside (34) of the profile bar (14) and which is covered over serves as the receiving space.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: June 30, 1998
    Inventor: Siegfried Kuebler
  • Patent number: 5749798
    Abstract: In a racket for tennis or the like games having a frame for receiving stringing and comprising a possibly hollow profile bar, and a handle end which is of polygonal cross-section and which is wound around with a grip strip and whose blank is provided at the corners of the cross-section with longitudinal edges separating each two longitudinal surfaces, the longitudinal edges are raised relative to their longitudinal surfaces. Preferably for that purpose longitudinal ribs extend at the longitudinal edges, the ribs being formed on the handle blank or being fixedly connected thereto in another manner.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: May 12, 1998
    Assignee: Wilson Sporting Goods Co.
    Inventors: Siegfried Kuebler, Frank Garrett
  • Patent number: 5419963
    Abstract: The modulus of elasticity of a string portion or a string of uniform diameter for stringing a racket for ball games, in particular a tennis racket, differs in a section-wise manner. This may be by a stepwise change of the said modulus of elasticity along the length of the string or a stepless variation of the said modulus of elasticity along the length of the string.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: May 30, 1995
    Inventor: Siegfried Kuebler
  • Patent number: 5346212
    Abstract: In an racket for ball games, in particular a tennis racket, having a stringing surface which is provided in a stringing frame and comprising mutually crossing strings as sections of at least one longer string portion the strings in one direction have different cross-sections from the middle region of the stringing surface to the shortest string in that direction. The strings themselves have cross-sections which, from the corresponding central axis of the stringing surface, increase or decrease in a plurality of steps to the shortest string in this direction.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: September 13, 1994
    Inventor: Siegfried Kuebler
  • Patent number: 5178387
    Abstract: A racket for ball games, in particular a tennis racket, comprising stringing provided in a stringing frame comprising a profile bar, a throat region adjoining the stringing and a handle (20) on a racket shaft on the longitudinal axis of the racket, which preferably forms a straight line of symmetry, is improved in regard to so-called impact shock in that the racket, between the throat region and the end of the handle (20), has a hinge location (44) whose hinge axis extends parallel to the stringing. The hinge location (44) is preferably disposed in the region of the handle (20) and is formed by a limb portion of the handle (20) which is preferably defined on both sides by groove-like channels (40) and is filled by an elastic shaped mass (42).
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: January 12, 1993
    Inventor: Siegfried Kuebler
  • Patent number: 5110126
    Abstract: A tennis racket having a racket head formed from a rod for serving as a tensioning frame, a string arrangement located within a plane in the racket head, an open frog zone adjoining the racket head and being laterally delimited on both sides by the rod, and a handle connected to the rod. The handle has a handle end and the racket head includes an apex at an end furthest from the handle end. The center of oscillation is located 470-500 mm from the handle end. A first weight is disposed on or within the handle at a distance of from 0-100 mm from the handle end. Second and third weights of equivalent mass are disposed on or within the racket head, the second and third weights being located on each side of an axis passing longitudinally through the racket and being disposed at an axial distance of 0-100 mm from a line extending through the apex in a direction perpendicular to the longitudinal axis of the racket. The total amount of the first, second, and third weights is in the range of 50-150 grams.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: May 5, 1992
    Assignee: Head Sportgeraete Gesellschaft m.b.H. & Co. OHG.
    Inventor: Siegfried Kuebler
  • Patent number: 5000452
    Abstract: A racket with a handle for ball games, in particular a tennis racket, with a head frame surrounding a stringing arrangement, an open throat region adjoining the head frame, and a handle cap which terminates the handle towards the end thereof and which approximately bears with a cap edge against a shaped handle portion and with same is wrapped around by a strip-like portion of grip material is to be improved in such a way that the wrapping leather or grip material can be easily fixed in position and reliably held in place. For that purpose the handle cap (26) has a clamping gap (28) for receiving the free end (26.sub.e) of the strip, and in addition the clamping gap (38) is directed approximately parallel to a surface (33) of the cap edge (32), one side surface (33) of which has a prong-like portion (41) formed thereon, which with the side surface delimits the clamping gap (38).
    Type: Grant
    Filed: August 9, 1989
    Date of Patent: March 19, 1991
    Inventor: Siegfried Kuebler
  • Patent number: 4768786
    Abstract: A racket, for playing a game using a ball of limited resiliency, such as a tennis racket comprises a racket head frame portion provided with stringing, a handle, and a shaft arrangement connecting the racket head frame portion and the handle. The resonance frequency of the racket head frame portion at least approximately corresponds to the period of time for which a ball is in contact with the strings of the racket when struck thereby, and the natural frequency or oscillation frequency of the racket substantially corresponds to the excitation frequency of the ball. The thickness of the racket frame as measured in a direction normal to the plane of the stringing is greater than the thickness of the handle as measured in a corresponding direction.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: September 6, 1988
    Inventor: Siegfried Kuebler
  • Patent number: 4664380
    Abstract: A racket for playing a game using a ball of limited resiliency such as a tennis racket comprises a racket head frame portion provided with stringing, a handle, and a shaft arrangement connecting the racket head frame portion and the handle. The resonance frequency of the racket head frame portion at least approximately corresponds to the period of time for which a ball is in contact with the strings of the racket when struck thereby, and the natural frequency of the racket substantially corresponds to the excitation frequency of the ball. The thickness of the racket frame as measured in a direction normal to the plane of the stringing is greater than the thickness of the handle as measured in a corresponding direction.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: May 12, 1987
    Inventor: Siegfried Kuebler
  • Patent number: 4182512
    Abstract: A racket for playing tennis or similar ball games has a frame or head portion mounting the web of strings and of generally oval or elliptical configuration and a straight handle co-axial with the major axis of the frame. The frame includes at the lengthwise sides of the frame, that is, adjacent to the minor axis of the frame, spaces within the frame material or in containers attached to said frame sides a plurality of granules such as pellets which are freely movable within said spaces if and when the racket is swung to hit a ball, thereby damping vibrations as are generated when the ball impacts upon the web mounted on the frame. Similar spaces can also be provided in the yoke of the racket and partly filled with pellets also causing damping the vibrations generated by the impact of the ball.
    Type: Grant
    Filed: September 22, 1976
    Date of Patent: January 8, 1980
    Assignee: Kuebler & Co.
    Inventor: Siegfried Kuebler
  • Patent number: D315585
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: March 19, 1991
    Inventor: Siegfried Kuebler
  • Patent number: D337802
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: July 27, 1993
    Inventor: Siegfried Kuebler