US Patent: 4,402,222 - Bolt Load Determining Apparatus


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

US Patent: 4,402,222

Bolt Load Determining Apparatus

Patentees:

Gene E. Olson (exact or similar names) - Kenosha, WI

Donald D. Grover (exact or similar names) - Kenosha, WI

Christopher B. Stout (exact or similar names) - Kenosha, WI

Thomas P. Becker (exact or similar names) - Kenosha, WI

Glenn A. Kaufman (exact or similar names) - Kenosha, WI

Norbert J. Kot (exact or similar names) - Milwaukee, WI

USPTO Classifications:

73/579, 73/761

Tool Categories:

Assignees:

Snap-On Tools Corp. - Kenosha, WI

Manufacturer:

Not known to have been produced

Witnesses:

none listed

Patent Dates:
Applied:	Jan. 26, 1982
Granted:	Sep. 06, 1983

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Stan Schulz
Snap-On Tools Company History

Description:

Dithmar, Stotland, Stratman & Levy - patent attorneys

Abstract

A first signal at a first frequency which is a selected harmonic of the resonant frequency of a bolt in a first loaded condition is determined. Then there is determined a second signal at a second frequency being the same harmonic of the resonant frequency of the bolt in a second loaded condition. Both frequencies are multiplied by a factor M. The up input of a counter receives one of the signals for a predetermined duration, and the down input receives the other signal for the same duration. The number of pulses remaining in the counter is representative of the difference in load between the first and second loaded conditions.