David H Rauch

US Patent:

46943684, Sep 15, 1987

Filed:

Jan 10, 1986

Appl. No.:

6/817621

Inventors:

Peter G. Bischoff - Cupertino CA
David J. Rauch - Milpitas CA
Vincent D. Retort - Cupertino CA
John R. Osborne - Saratoga CA

Assignee:

Read-Rite Corporation - Milpitas CA

International Classification:

G11B 531
G11B 517

US Classification:

360126

Abstract:

A thin film magnetic head is made with a center-tapped coil structure formed of three layers of coils. The middle coil is configured to be bifilar. When recording data on a magnetic medium, current flows through one-half of the bifilar coil and through one adjacent coil to create positive transitions, and for negative transitions, current flows through the other half of the bifilar coil and through the other adjacent coil. When reading the data that is recorded on a magnetic medium, all turns of the entire coil configuration operate for transducing the data.

US Patent:

61530166, Nov 28, 2000

Filed:

Dec 7, 1998

Appl. No.:

9/206814

Inventors:

David J. Rauch - San Jose CA
Robert A. Cole - San Jose CA
Shahzad Mahmud - San Jose CA

Assignee:

Creative Tool Technology, Inc. - San Jose CA

International Classification:

B08B 100

US Classification:

134 6

Abstract:

A pipe cleaner for manually cleaning the threads of pipes of differing sizes includes a body into which is slidably engaged at least one arm with an abrasive member. The abrasive member at the end of the arm extends into an orifice in the body. A single arm opposing a "V" shaped block may be used as well as a plurality of arms with abrasive members. A cover is rotatably mounted on the body and includes a number of angled slots, which are angled relative to radii of the cover and may be an arc segment of a spiral. Pegs that are coupled to each arm are engaged with the angled slot in the cover. Thus by rotating the cover relative to the body of the pipe cleaner, the arms with their abrasive members are driven inwards and outwards of the orifice by the peg and angled slot assembly. The cover includes an orifice that is approximately the same size as the orifice in the body, such that the cover does not inhibit a pipe from extending through the pipe cleaner. The body of the pipe cleaner may alternatively include opposing jaws upon which are mounted, respectively, a "V" shaped block and a beam having an abrasive member.

US Patent:

40407969, Aug 9, 1977

Filed:

Jun 30, 1975

Appl. No.:

5/591886

Inventors:

George C. Vincent - Hayward CA
David Rauch - Castro Valley CA

Assignee:

The Kingsford Company - Louisville KY

International Classification:

C10L 536
C10L 1100

US Classification:

44 14

Abstract:

Disclosed is an artificial firelog comprised of a flammable body typically formed of a particulate wood and wax mixture preferably with salts added for flame color. In a preferred embodiment, by a coextrusion process, a groove is formed along the outer surface of the body and extends substantially its entire length. The groove is filled with gelled starter fuel. The log is preferably formed with at least one substantially flattened side with the gelled fuel filled groove located just above the flattened side whereby the log can be situated with its flattened side on the fireplace grate or andirons and the gelled fuel filled groove located along the lower preferably front, face of the log thereby facilitating the log's fast lighting characteristics. The log is provided with an over-wrapper having an inner low or medium density polyethylene coating and which over-wrapper is heat sealed about the log. When lighting, the over-wrapper is initially lit and this also ignites the gelled fuel.