FREDERICK W HENSEL
Vehicle Board in Butler, PA

5295392, Mar 22, 1994

Mar 26, 1992

7/858068

Frederick W. Hensel - Butler PA
Mark F. Hensel - Butler PA
Steve D. Sandstrum - Kingwood TX
John Coleman - Sugarland TX
John H. Parnell - Houston TX
Stephen J. Boros - Friendswood TX

Tech Team, Inc. - Butler PA

G01M 328

73 495

A hydrostatic test system for subjecting a workpiece or test specimen to a predetermined test pressure until the workpiece fails by developing a leak detectable by the test system. The hydrostatic test system is a modular system readily adaptable to, and able to incorporate therein, a number of different physical devices for regulating, controlling, detecting, and registering functions and activities pertaining to leak detection. Among the devices adaptable in the hydrostatic test system for detecting a leak condition in the workpiece is a differential pressure switch and a static pressure switch, a combination differential and static pressure switch, or an accumulator associated with either a pressure transducer or a high accuracy transducer. The leak condition may be visually signaled by a lamp or indicator light or the sensing of a leak condition may be visually output to a CRT screen. The hydrostatic test system includes a number of test stations mounted in a large upright cabinet or unit, with each test station accommodating one test specimen.

5304757, Apr 19, 1994

Mar 26, 1992

7/858069

Frederick W. Hensel - Butler PA

Tech Team, Inc. - Butler PA

H01H 3538

200 82R

A combination differential and static pressure switch utilized in a test system for detecting the occurrence of a differential pressure condition within the test system. The test system includes a valve assembly in flow communication with the pressure switch for determining the working pressure applied to a workpiece being tested. The pressure switch includes a first tubular-shaped member and a second tubular-shaped member axially aligned therewith and adapted for removable securement to the first tubular-shaped member. A differential piston is disposed for slidable reciprocal movement within the first tubular-shaped member and a preset piston is disposed within the second tubular-shaped member and is adapted for slidable reciprocal movement therein. Both pistons are axially aligned to each other, and the differential piston has a magnet mounted to the face end thereof. An elongated passage extends substantially into and through the second tubular-shaped member and a cylindrical support member is adapted for removable and adjustable placement within the passage.

5774047, Jun 30, 1998

Apr 12, 1996

8/631463

Frederick William Hensel - Butler PA

B60C 2300

340442

A tire pressure sensing system is disclosed for detecting, transmitting and indicating low tire pressure information to a vehicle operator. One embodiment of the invention includes an improved pressure sensing switch comprising a hermetically sealed bladder and membrane switch. Another embodiment of the present invention includes an improved tire pressure sensing system which automatically communicates low tire pressure information as well as tire location information to the vehicle operator.