Ester Patents (Class 273/DIG9)
  • Patent number: 5664774
    Abstract: A softball has a high end synthetic leather stitched cover formed from a low density non-woven fiber mat impregnated with polyurethane. The softball, which can be formed to meet association specifications, has a circumference of 11 or 12 inches and a cover to core weight ratio significantly less than 0.1, typically in the range of 0.08-0.16, while meeting durability requirements. The cover preferably has a thickness of 0.045-0.065 inches. Because a greater weight concentration is in the core of the ball, the ball has improved playability characteristics over conventional balls having heavier synthetic leather covers, while exhibiting a sound comparable to that of a leather covered softball when struck with a bat.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: September 9, 1997
    Assignee: Lisco, Inc.
    Inventors: Alan D. Walker, John Uaszek
  • Patent number: 5464212
    Abstract: A golf putter having a novel putter head is disclosed. The putter head assembly includes a putter body of rigid material, preferrably metal, and a resilient full face single layer elastomeric striking face insert. The putter body and insert are joined together through the use of a shear joint around the periphery of the parts and bonded together using a structural adhesive designed for shock absorbing devices. Air/gas egress holes are incorporated within the putter body to eliminate compressibility effects of the air contained within the internal cavity, created upon assembly of the putter body and the elastomeric striking face insert.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: November 7, 1995
    Inventor: Thomas A. Cook
  • Patent number: 5100144
    Abstract: A golf club head made of a fiber-reinforced resin, at least the outermost layer of the face thereof being composed of a cloth-reinforcing material impregnated with a matrix resin containing whiskers mixed therein so that the edges of the scoring lines will be composed of the matrix resin containing the whiskers mixed therein.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: March 31, 1992
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Takaharu Okumoto, Tetsuo Hayashi
  • Patent number: 4579343
    Abstract: A molded composite racquet is provided, wherein the frame of the entire racquet is prepared using the combination of continuous graphite fibers longitudinal within the shape of the frame, wrapped in a bias arrangement with layers of fiberglass, that combination being covered by a protective resinous outerlayer. The presence of the graphite fiber in a unidirectional orientation around the hoop of the racquet in the plane of the strings increases the resistance against compression with minimal affect on the flexibility, bending or torsion, of the racquet. The concentric and bias orientation of the fiberglass layer supplies sturdiness to increase the resistance to torsion and bending stress. The molded composite racquet achieves a controlled impulse duration during impact with a game ball which provides greater control during impact and less shock to the user of the racquet during the recreation.
    Type: Grant
    Filed: September 29, 1983
    Date of Patent: April 1, 1986
    Assignee: Ektelon
    Inventor: Raymond L. Mortvedt
  • Patent number: 4253665
    Abstract: A bowling ball having a thin viscous film deposited upon its surface from within the ball for increasing the coefficient of friction between the ball and the bowling lane. The film comprises a saturated plasticizer incorporated into the ball at the time of manufacture that slowly exudes from the outer shell over an extended period. The method comprises preparing a resin blend capable of being cured into a tough, durable material and mixing the resin blend with a plasticizer which is miscible with the liquid phase resin blend, but incompatible with the solid phase. Catalysts are admixed and heat is applied to the mixture to cure the resin blend into a tough and durable outer shell having a 72 Shore D hardness.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: March 3, 1981
    Assignee: Columbia Industries, Inc.
    Inventors: Charles M. Miller, Jr., Samuel J. Orlando
  • Patent number: 4241918
    Abstract: A ball having the general appearance, shape and aerodynamic characteristics of a conventional football when thrown or kicked; but which is softer and lighter allowing for its use in congested areas--it does not travel as far when thrown or kicked--and by younger children who are more susceptible to injury with a conventional football. The ball is comprised of a polyester batting interior or center having a wool batting inner cover and a polyester double-knit outer cover. The ball preferably has "cross stitching" prepared from a textile paint to give an elevated or raised ridge for gripping the ball thereby enhancing its throwing characteristics.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: December 30, 1980
    Inventor: Chester F. Massino
  • Patent number: 4169594
    Abstract: A laminated material suitable for use in inflatable playballs comprises a first layer of thermoplastic synthetic resin and a second layer. The second layer is formed of two thermoplastic resin materials, one having a tensile strength greater than the material of the first layer and forming a lattice structure and the other filling the interstices of the lattice structure, the filling material being exposed at one surface of the second layer and bonded at that surface to the first layer.
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: October 2, 1979
    Assignee: The Mettoy Company Limited
    Inventor: John C. Crane
  • Patent number: 4004565
    Abstract: A clip for use with a gas-operated gun to package and supply to the gun hygienic projectiles for inoculating animals with a particular biologically active material. The clip contains a molded structure having a plurality of axially aligned adjacent cylindrical chambers receiving the implant projectile and each chamber is sealed by a rupturable sealing film at each end thereof. Indexing recesses are provided on said structure and associated with each of the chambers for indexing the clip in the gun to dispose seriatim the chambers in alignment with the bore of the gun.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: January 25, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Earl Lee Fischer, Jay W. Gould, III