Dillis V Allen: Constant resonant frequency golf club head. June 5, 1990: US04930781 (215 worldwide citation)

A metallic golf club head formed with a one-piece thin-walled forward body including a ball striking face, a perimeter wall having a uniform rearward depth and a hosel, and a rear cover that encloses the perimeter wall.

James F McKeighen: Titanium golf club head and method. Harness Dickey & Pierce, July 4, 1995: US05429365 (138 worldwide citation)

A golf club head and method of manufacture in which the golf club head comprises a body having a striking face, side walls, a neck portion and a heel and toe portion formed as an integral unit, said golf club body being attached to a top plate by screwing, gluing or welding wherein the top plate can ...

Michael S Muntner, James S Perron: Laser machining of ceramic cores. AlliedSignal, James W McFarland, November 14, 1995: US05465780 (96 worldwide citation)

A method is disclosed for producing a hollow airfoil, specifically, a blade or vane for a gas turbine engine, which is formed with a complex interior for cooling purposes. Broadly, the method comprises the steps of molding a green ceramic core having outer surfaces generally contoured to produce the ...

Bradley D Schweigert, John C Bliss: Golf club head having a crown with thin regions. Karsten Manufacturing Corporation, September 21, 2010: US07798203 (53 worldwide citation)

A method of casting a hollow golf club head includes casting the crown with a plurality of thin regions having a thickness of less than 0.030 inch separated by a plurality of ribs. The ribs act as cast-in runners that enable the thin sections to be formed without voids despite the extremely thin cro ...

Kurt F O Connor, James P Hoff, Donald J Frasier, Ralph E Peeler, Heidi Mueller Largent, Floyd F Trees, James R Whetstone, John H Lane, Ralph E Jeffries: Single-cast, high-temperature, thin wall structures and methods of making the same. General Motors Corporation, Cary W Brooks, March 22, 1994: US05295530 (52 worldwide citation)

Disclosed is a single-cast, thin wall structure capable of withstanding impinging gases at temperatures of 4300.degree. F. and higher, and method of making the same. Using a bleed line of the instant invention allows for a decreasing metal pressure with respect to time which prevents any damage to t ...

Harry A Woodrum, William E Sikkenga: Multi-wall core and process. Howmet Research Corporation, September 30, 2003: US06626230 (50 worldwide citation)

Method making a multi-wall ceramic core for use in casting airfoils, such as turbine blades and vanes, wherein a fugitive pattern is formed having multiple thin wall pattern elements providing internal wall-forming spaces of a final core, the pattern is placed in a core molding die cavity having a d ...

Richard Melling, Nigel Challand: Water dispersible moulds. Borden, Roylance Abrams Berdo & Goodman L, November 12, 1996: US05573055 (45 worldwide citation)

A water dispersible mould for making a casting, the mould comprising a water-insoluble particulate material-and a binder therefor, the binder including polyphosphate chains and/or borate ions. The invention also provides a process for making a water dispersible mould for making a casting, the proces ...

Wilfred H Wilkinson, Edwin Pateman, Anthony G Gale, John Slinger: Method of making an aerofoil member for a gas turbine engine. Rolls-Royce, Cushman Darby & Cushman, December 20, 1983: US04421153 (44 worldwide citation)

A blade or vane structure for a gas turbine engine comprises a hollow aerofoil member and a cooling air entry tube within the hollow aerofoil member, the aerofoil and the tube comprising a unitary cast structure. To make this structure it is proposed that a lost wax casting process should be utilize ...

Ronald Scott Bunker, Canan Uslu Hardwicke, Ching Pang Lee: Method of forming concavities in the surface of a metal component, and related processes and articles. General Electric Company, Francis T Coppa, Patrick K Patnode, December 4, 2007: US07302990 (43 worldwide citation)

A method of forming at least one concavity of a selected size and shape within a surface of an internal passageway of a metallic component comprises: depositing a ceramic-based material by a direct-write technique onto a ceramic core which is suitable for forming the internal passageway during a cas ...

Dominic J Horwood: Method of investment casting and a method of making an investment casting mould. Rolls-Royce, Cushman Darby & Cushman Intellectual Property Group of Pillsbury Madison & Sutro, February 9, 1999: US05868194 (33 worldwide citation)

A method of making an investment casting mould comprises producing a CAD definition of a turbine blade, and determining the distribution of isosurfaces of constant temperature around the CAD definition of the at least one article if the external surface of the CAD definition of the at least one arti ...