Propylene Patents (Class 273/DIG12)
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Patent number: 5443270Abstract: A disc which is used as a game piece for playing a game known as "Milk Caps"or "POGS". At least one side of the disc is decorated. The disc makes a metallic sound when it is dropped, thrown or slammed against a solid playing surface. The disc is preferably made of a strong plastic such as polyphenlene sulfide which prevents the disc from shattering. The disc may have an annular lip along its edge which facilitates manufacturing. The edge of the disc may be sloped or angled wherein the bottom portion of the disc has a slightly larger diameter than the top portion of the disc. This also facilitates manufacturing.Type: GrantFiled: February 14, 1994Date of Patent: August 22, 1995Inventor: Steven R. Loritz
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Patent number: 5211404Abstract: The system is for use on outdoor firing ranges. Target cards bearing the printed targets are secured to a 4 ft. square panel made of Coroplast (trademark), which is extruded twin-walled polypropylene sheet. The sheet is formed with built-in curvature, which is sufficient to render the target panel rigid, even though the material is thin enough that bullets can pass through without punching-out. Because of the curvature, no frame is required to keep the panel rigid. Scoring rings are printed on the face of the panel, together with a centering device which comprises markings that allow an attendant to align fresh target cards with the scoring rings. Two or three plies of Coroplast may be welded/glued face to face, for larger targets.Type: GrantFiled: February 20, 1992Date of Patent: May 18, 1993Inventor: Robert P. Grant
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Patent number: 5026060Abstract: An indoor golf game is provided having a plurality of playing areas in which each playing area is enclosed by a netting frame and consists of a golf driving enclosure from which a golf ball may be propelled by a player swinging a golf club at the golf ball. A fairway is located at one side of the golf driving enclosure, where subsequent shots of the golf ball may be played therefrom. A putting green having a hole therein is located behind the golf driving enclosure and the fairway, where additional subsequent shots of the golf ball may be played therefrom. A structure is provided for selectively conveying the golf ball in one instance from the golf driving enclosure to the putting green and in another instance from the golf driving enclosure to the fairway depending upon how the player hits the golf ball with the golf club within the golf driving enclosure.Type: GrantFiled: May 3, 1990Date of Patent: June 25, 1991Inventor: Paul S. Beeber
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Patent number: 5009425Abstract: A golf club head in which a core buried in the interior of an outer shell of a fiber reinforced resin is molded out of a molten mixture of a thermoplastic resin and powder of a metal having a high specific gravity, and a method of manufacturing such golf club heads.Type: GrantFiled: October 27, 1989Date of Patent: April 23, 1991Assignee: The Yokohama Rubber Co., Ltd.Inventors: Takaharu Okumoto, Toshio Ninomiya, Tstsuya Hayashi
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Patent number: 4850483Abstract: A golf accessory holder for golf balls, tees and the like is formed of an elastomeric thermoplastic rubber. The holder provides a cylindrical opening for at least two golf balls, an upper reinforcing rim with provision for tees and an external reinforcing spine with provision for tees.Type: GrantFiled: June 11, 1987Date of Patent: July 25, 1989Inventor: Denis M. Stack
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Patent number: 4684130Abstract: An improved ice hockey stick is disclosed which is made with a handle component whose lower end tapers to fit closely into a closely conforming groove in the rear edge of a hardwood table. The handle component may be made of hardwood or it may be made of foam injected plastic material in accordance with another aspect of the subject matter disclosed. The foam injected handle component has a centrally located filler member and, on each side, a reinforcing strip of unidirectional strands of fibers in a suitable bonding agent mounted flush with the wide sides of the handle. A process for making a foam injected plastic component is disclosed as well as a method of making an ice hockey stick using the novel joint applicable to conventional hardwood handle components and to foam injected plastic handle components.Type: GrantFiled: February 18, 1983Date of Patent: August 4, 1987Assignee: Inclasco Corporation Ltd.Inventors: Denis Drolet, William Burchmore, Leo Drolet
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Patent number: 4541629Abstract: An injection molded baseball bat with a core of thermoplastic plus a blowing agent and a solid skin of thermoplastic per se injected into the mold at one and the same time. The skin and core may be of the same or of different thermoplastic. The baseball bat is a unitary structure of superior strength and finish with the foamed core and solid skin fused together.Type: GrantFiled: June 29, 1984Date of Patent: September 17, 1985Inventor: William Witkowski
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Patent number: 4498672Abstract: Moldable golf club heads formed from a polypropylene plastic material encasing an elongated solid steel insert with a modulus of elasticity of approximately 30 million cycles per second and arranged with one end thereof extending one-eighth of an inch from the center of and substantially perpendicular to the striking face of the golf club head. The insert forms a part of the path for the shock wave produced when a ball having a resonant frequency of approximately 19 million cycles per second is struck by the head with the shock wave moving through the one-eighth of an inch of the plastic material, longitudinally through the insert to the head of the club and back the same path to point of impact whereby the density of the polypropylene and the insert being such that the recovery rate of flexure frequency of the head substantially equals the distortion frequency of the golf ball propelled from the club head.Type: GrantFiled: October 17, 1983Date of Patent: February 12, 1985Inventor: John G. Bulla
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Patent number: 4447479Abstract: This invention relates to plastic sheet material, and in particular concerns the production of a plastics sheet material which has a wide range of uses, because of the properties thereof.Type: GrantFiled: October 28, 1980Date of Patent: May 8, 1984Assignee: Plastona (John Waddington) Ltd.Inventors: Peter Harrison, Thomas N. Gaunt
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Patent number: 4385759Abstract: A skip rope for exercise and fitness conditioning includes a length of polypropylene rope threaded through two handle members disposed at opposite ends of the length of rope. After the rope is threaded through each handle member, the free ends of the rope are knotted to prevent it from pulling back through the two handles. Each handle is constructed of a tubular section of polyvinylchloride which has nylon end plugs press fit into the open ends of the tube. The outside diameter surface of each end plug coincides with the outside diameter surface of the polyvinylchloride tubing and each end plug includes a rope-receiving clearance aperture just slightly larger than the outside diameter of the rope. The material combination of nylon for the end plug and polypropylene for the rope provides a type of self-lubricating interface which enables the rope to turn and twist completely independent of the handle.Type: GrantFiled: June 4, 1981Date of Patent: May 31, 1983Inventor: James M. Everroad
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Patent number: 4363312Abstract: An archery quiver for detachable connection to an archery bow having a telescoping prong and socket mounting arrangement in which all of the components are made of plastic and in which the prong and socket are locked relative to each other by a deflectable plastic latch and latch release mechanism. The latch is deflected upon relative movement of the prong and socket to permit telescoping after which the latch returns to its original position to prevent separation. A separate release mechanism is used to deflect the latch to permit detachment of the quiver from a bow.Type: GrantFiled: December 26, 1978Date of Patent: December 14, 1982Assignee: Schmelzer CorporationInventor: Arthur Spitzke
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Patent number: 4165875Abstract: A bowling pin is prepared by injection molding, a high impact polypropylene belly and, thereafter, inserting into the belly a wood laminate core. The polypropylene is utilized in the presence of a coupling agent and a blowing agent and is admixed with a filler. The products produced in accordance herewith are suitable replacements for existing wood bowling pins.Type: GrantFiled: September 29, 1976Date of Patent: August 28, 1979Inventor: Robert H. Dykehouse
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Patent number: 4076246Abstract: A target made of interchangeable sections each comprising a multiplicity of membranes or plies of penetrable, elastomeric or resilient, tear resistant sheet resin material, the membranes being separated by intervening layers of porous or low density, resilient material such as foam resin material.Type: GrantFiled: November 14, 1975Date of Patent: February 28, 1978Inventor: Leonard S. Meyer
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Patent number: 3951405Abstract: A toy or game device is comprised of a ball which is supported on a small upright post or pylon. An elongate rod is provided with a flexible line which in turn is connected to a generally cylindrical ball-engaging member. The ball-engaging member is formed of a yieldable material and is provided with a plurality of spaced apart flexible fingers. The opening defined between the fingers is slightly less than the cross-sectional size of the ball. By manipulating the flexible rod, the ball-engaging member may be vertically reciprocated towards and away from the post-supported ball. If accurately manipulated, the ball-engaging member during its downward movement may be caused to engage and grip the ball, and upon its subsequent upward movement will remove the ball from the post without causing the latter to fall.Type: GrantFiled: January 30, 1975Date of Patent: April 20, 1976Inventor: Ben Long
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Patent number: 3937468Abstract: A nunchaku having two spaced apart rod-like elements or handle members, each element being formed of a plastic insert molded in a body portion which forms the balance of the element. The plastic insert, which is formed on nylon 6/6, has two spaced apart generally parallel apertures extending from one exterior sidewall of the element to the other exterior sidewall, the insert being disposed in one end of the element. The balance of the element is formed of high density polypropylene which is molded about the insert, the body portion having better impact resistance than the insert, and the insert, which receives a cord to secure one element of the nunchaku to another element of the nunchaku, having better wear resistance and greater strength than the high density polypropylene.Type: GrantFiled: February 24, 1975Date of Patent: February 10, 1976Inventor: Francis E. Conde, Sr.