Patents by Inventor Jerry D. Stubblefield
Jerry D. Stubblefield 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).
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Patent number: 7597060Abstract: An apparatus and method for reducing surface friction drag on the hull of a surface vessel by entraining air into water flowing in the boundary layer flow along the hull. The apparatus creates a reduced pressure region by diverting a first portion of the flow away from the surface of the hull. An air pocket is formed in the reduced pressure region and a second portion of the flow is directed through the air pocket by nozzles, which acts as a plunging jet and entrains air into the boundary layer.Type: GrantFiled: August 14, 2007Date of Patent: October 6, 2009Assignee: North Shore PartnersInventors: Donald P. Stubblefield, Jerry D. Stubblefield
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Patent number: 7267067Abstract: An apparatus and method for reducing surface friction drag on the hull of a surface vessel by entraining air into water flowing in the boundary layer flow along the hull. The apparatus creates a reduced pressure region by diverting a first portion of the flow away from the surface of the hull. An air pocket is formed in the reduced pressure region and a second portion of the flow is directed through the air pocket by nozzles, which acts as a plunging jet and entrains air into the boundary layer.Type: GrantFiled: January 19, 2005Date of Patent: September 11, 2007Assignee: North Shore PartnersInventors: Donald P. Stubblefield, Jerry D. Stubblefield
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Patent number: 7219614Abstract: An apparatus and method for reducing surface friction drag on the hull of a surface vessel by entraining air into water flowing in the boundary layer flow along the hull. A hemispherical protrusion creates flow separation by diverting a portion of the water flow away from the surface of the hull, which results in a reduced pressure region downstream from the protrusion. A vent located on the protrusion allow air to flow into the reduced pressure region. The air in the reduced pressure region is entrained into the water due to turbulent mixing from vortices shed on to the rear of the protrusion.Type: GrantFiled: April 15, 2005Date of Patent: May 22, 2007Assignee: North Shore PartnersInventors: Donald P. Stubblefield, Jerry D. Stubblefield
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Patent number: 5185943Abstract: The present invention relates to an insert member for use within the sole region of an athletic shoe. The insert member is made from a resilient material and provides improved energy return to the outsole to enhance recovery from the forces applied to the shoe.Type: GrantFiled: September 20, 1991Date of Patent: February 16, 1993Assignee: Avia Group International, Inc.Inventors: James K. Tong, Lawrence Selbiger, Jerry D. Stubblefield, Jack Curley
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Patent number: 4741114Abstract: A shoe sole including an outer sole of substantially uniform thickness and a midsole. The midsole has peripheral portions that are relatively thick compared to its central portion which is relatively thin. The lower surface of the midsole is preferably configured as a concavity. The outer sole has a top surface which is connected to the concave lower surface of the midsole to define, along with the midsole, a general lateral concavity for the shoe. The lower surface of the outer sole includes tread members. The outermost tread members, outer sole and midsole cooperate to support the relatively thin central portion of the midsole in a cantilever fashion. Upon ground impact, the lower extremities of the tread members are urged resiliently upwardly and outwardly, and the relatively thin central portion flexes downwardly to provide cushioning for the foot of the wearer.Type: GrantFiled: June 22, 1987Date of Patent: May 3, 1988Assignee: AVIA Group International, Inc.Inventor: Jerry D. Stubblefield
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Patent number: 4550510Abstract: An outer sole especially designed for basketball shoes which is lightweight, stable, and provides a greater degree of shock absorption than heretofore possible. The sole includes a plurality of kinetic levers or tread members which extend downwardly and outwardly from the peripheral portion of the bottom of the sole and, together with a relatively stiff, centrally formed pedestal on the inside surface of the sole, define a cantilevered construction that dissipates shock by inducing spreading of the levers laterally outwardly upon foot-induced ground impact. The space between the inner, central pedestal and the side wall of the sole defines a cavity positioned above the respective tread members for facilitating compression and spreading thereof to enhance to shock-dissipating qualities of the sole. The sole also includes a side wall which, together with the upper walls of the tread members, defines a groove. The groove also facilitates compression and spreading of the tread members.Type: GrantFiled: April 30, 1984Date of Patent: November 5, 1985Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: 4546556Abstract: An outer sole especially designed for basketball shoes which is lightweight, stable, and provides a greater degree of shock absorption than heretofore possible. The sole includes a plurality of kinetic levers or tread members which extend downwardly and outwardly from the peripheral portion of the bottom of the sole and, together with a relatively stiff, centrally formed pedestal on the inside surface of the sole, define a cantilevered construction that dissipates shock by inducing spreading of the levers laterally outwardly upon foot-induced ground impact. The space between the inner, central pedestal and the side wall of the sole defines a cavity positioned above the respective tread members for facilitating compression and spreading thereof to enhance the shock-dissipating qualities of the sole. The sole also includes a side wall which, together with the upper walls of the tread members, defines a groove. The groove also facilitates compression and spreading of the tread members.Type: GrantFiled: January 17, 1984Date of Patent: October 15, 1985Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: 4481727Abstract: A shoe sole construction which features an outer sole (18) having at least one opening (26) through which a protrusion (30) of a less dense midsole (16) extends. The cutout area (26) of the more dense outsole (18) decreases the overall weight of the sole (12), while the less dense protrusion (30) aids in cushioning the foot to provide greater comfort and support. Other protrusions (32 and 68) may also be provided through other openings in the outsole to further lessen weight and increase the cushioning effect on the foot. Additionally, grooves (42) may be provided on the upper surface (40) of the midsole (16) to increase flexibility of the sole (12) and further aid in cushioning the foot and providing peripheral support where needed. The invention may be applied to athletic shoes (FIGS. 1-9), a woman's high-heeled shoe (FIGS. 10-14), or other footwear.Type: GrantFiled: June 21, 1982Date of Patent: November 13, 1984Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: 4454662Abstract: A sole for an athletic shoe, such as a cleated soccer or football shoe, comprises a thin, unitary member formed of flexible material. The member has a contour or configuration which renders the flexible material substantially rigid at the arch and heel portions of the sole. This provides substantial support to the arch of the foot. Cleats may extend from the toe and heel portions of the lower surface of the sole member.Type: GrantFiled: February 10, 1982Date of Patent: June 19, 1984Inventor: Jerry D. Stubblefield
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Patent number: 4449307Abstract: An outer sole especially designed for basketball shoes which is lightweight, stable, and provides a greater degree of shock absorption than heretofore possible. The sole includes a plurality of kinetic levers or tread members which extend downwardly and outwardly from the peripheral portion of the bottom of the sole and, together with a relatively stiff, centrally formed pedestal on the inside surface of the sole, define a cantilevered construction that dissipates shock by inducing spreading of the levers laterally outwardly upon foot-induced ground impact. The space between the inner, central pedestal and the side wall of the sole defines a cavity positioned above the respective tread members for facilitating compression and spreading thereof to enhance the shock-dissipating qualities of the sole. The sole also includes a side wall which, together with the upper walls of the tread members, defines a groove. The groove also facilitates compression and spreading of the tread members.Type: GrantFiled: April 3, 1981Date of Patent: May 22, 1984Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: D272580Type: GrantFiled: March 20, 1981Date of Patent: February 14, 1984Inventor: Jerry D. Stubblefield
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Patent number: D274574Type: GrantFiled: April 3, 1981Date of Patent: July 10, 1984Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: D280568Type: GrantFiled: November 15, 1983Date of Patent: September 17, 1985Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: D285023Type: GrantFiled: February 4, 1986Date of Patent: August 12, 1986Assignee: Pensa, Inc.Inventors: James K. Tong, Jerry D. Stubblefield
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Patent number: D285984Type: GrantFiled: January 31, 1986Date of Patent: October 7, 1986Assignee: Pensa, Inc.Inventors: James K. Tong, Jerry D. Stubblefield
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Patent number: D286342Type: GrantFiled: October 1, 1985Date of Patent: October 28, 1986Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: D287182Type: GrantFiled: February 13, 1985Date of Patent: December 16, 1986Assignee: Pensa, Inc.Inventor: Jerry D. Stubblefield
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Patent number: D292946Type: GrantFiled: January 9, 1987Date of Patent: December 1, 1987Assignee: The Donner Mountain CorporationInventors: Jerry D. Stubblefield, Lawrence Selbiger
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Patent number: RE33066Abstract: A shoe sole construction which features an outer sole (18) having at least one opening (26) through which a protrusion (30) of a less dense midsole (16) extends. The cutout area (26) of the more dense outsole (18) decreases the overall weight of the sole (12), while the less dense protrusion (30) aids in cushioning the foot to provide greater comfort and support. Other protrusions (32 and 68) may also be provided through other openings in the outsole to further lessen weight and increase the cushioning effect on the foot. Additionally, grooves (42) may be provided on the upper surface (40) of the midsole (16) to increase flexibility of the sole (12) and further aid in cushioning the foot and providing peripheral support where needed. The invention may be applied to athletic shoes (FIGS. 1-9), a woman's high-heeled shoe (FIGS. 10-14), or other footwear.Type: GrantFiled: August 22, 1986Date of Patent: September 26, 1989Assignee: AVIA Group International, Inc.Inventor: Jerry D. Stubblefield
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Patent number: D338549Type: GrantFiled: July 9, 1991Date of Patent: August 24, 1993Assignee: North Shore PartnersInventor: Jerry D. Stubblefield