Kenneth W Perkins

US Patent:

62201247, Apr 24, 2001

Filed:

Mar 4, 1999

Appl. No.:

9/262456

Inventors:

Kenneth A. Perkins - Salem OR

Assignee:

Speed Set, Inc. - Salem OR

International Classification:

B25B 1316

US Classification:

81174

Abstract:

A fire hydrant wrench is provided with a chatter-thread arrangement that permits a threaded handle to be pushed, rather than manually threaded, into engagement with a fire hydrant fixture. A quick release trigger similarly permits the handle to be quickly withdrawn without unthreading. Faster operation of hydrants, with consequent savings of lives, results. Other improvements are also disclosed, including reversible, replaceable gripping teeth that tend to prevent even a loosely coupled wrench from falling off a fire hydrant.

US Patent:

45534357, Nov 19, 1985

Filed:

Jul 19, 1983

Appl. No.:

6/515240

Inventors:

Harold Goldfarb - Irvine CA
Kenneth L. Perkins - Yorba Linda CA
Bernard L. Weigand - Fullerton CA

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

G01M 320

US Classification:

73 407

Abstract:

A novel method and apparatus for detecting leaks in glass-to-metal seals of microelectronic devices and the like are described which comprise a double-gasketed vacuum station including a base plate having a central hole and a first gasket for exposing one side of the seals to a leak detector; a vacuum fixture surrounding the device provides a marginal region therearound which can be evacuated to prevent helium from permeating the first gasket; the vacuum fixture includes a central opening to expose the other side of the seals to a helium-containing atmosphere within a shroud enclosing the device and vacuum fixture; a second gasket provides a seal between the vacuum fixture and device periphery at the central opening in the fixture. For leak tests under controlled time/temperature conditions, an adjacent infrared lamp is used to radiantly heat the package containing the glass-to-metal seals, and a mask is included to avoid direct radiant heating of the gaskets and glass-to-metal seals.