Thomas H Bolgert

US Patent:

48178535, Apr 4, 1989

Filed:

Nov 26, 1986

Appl. No.:

6/936640

Inventors:

John F. Scanlon - Roscoe IL
Thomas A. Bolgert - Rockford IL
David W. Okey - Rockford IL
William D. Sherman - Genoa IL

Assignee:

Sundstrand Corporation - Rockford IL

International Classification:

B23K 3100

US Classification:

228121

Abstract:

In order to accommodate post-manufacturing, or secondary operations in precision assemblies using composite materials, where the secondary operations consist of drilling, machining, grinding, lapping, or other material-removing processing, without the need to resort to expensive diamond tooling and while maintaining needed structural integrity, a composite formed of a base material, a matrix, and a machineable material is provided. The matrix is bonded to the base material and the machineable material is rendered integral with the matrix and sufficiently thick to accommodate subsequent material-removing processing to a precision dimension. By utilizing the composite, method of forming the composite, and article of manufacture, it is possible to take advantage of the characteristics of high strength and light weight even in precision assemblies due to the fact that the machineable surface is not required for structural integrity, and the machineable surface can be applied for initial machining or other material-removing processing and reapplied for subsequent machining or other material-removing processing to restore worn or damaged surfaces.

US Patent:

48952192, Jan 23, 1990

Filed:

Oct 11, 1988

Appl. No.:

7/255789

Inventors:

Richard C. Welch - Rockford IL
Thomas A. Bolgert - Rockford IL

Assignee:

Sundstrand Corporation - Rockford IL

International Classification:

F01M 118

US Classification:

184 64

Abstract:

A device (1) for use in conjunction with an engine (25) is adapted to contain a predetermined level (A) of a liquid such as oil therein. A fill passage (4) is provided for adding liquid to the device and a drain passage (7) is provided for draining liquid from the device when the liquid is above the predetermined level. A movable valve (12) is provided for opening and closing the fill passage and the drain passage. The valve is automatically positioned so as to close both passages in response to start up of the engine whereby liquid will not be lost through the passage during operation of the engine. When the engine is not operating, the fill passage and drain passage are automatically opened in response to the application of pressure filling pressure to the fill passage as a result of an axial vent hole (31) which communicates the filling pressure to an end (32) the movable valve. The device may be an integrated drive generator in an aircraft which is designed to operate successfully in any aircraft attitude.