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US Patent: 2,993,398
Slidable Jaw End Wrench With Spiral Actuator
Ernest F. Schlote - San Antonio, TX

USPTO Classifications:
81/165, 81/170

Tool Categories:
wrenches : wrench adjustment types : quick adjust wrenches

Lok-Slide Wrench Company, Inc. - Dallas, TX

Not known to have been produced


Patent Dates:
Applied: Jul. 08, 1959
Granted: Jul. 25, 1961

Patent Pictures:
Ernest F. Schlote patent July 25, 1961
USPTO pdf tiff
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Lost motion and friction are major challenges in the design and execution of adjustable wrenches with a slide and spiral shaft geared to the movable jaw.

This patent includes bearings, close manufacturing tolerances, and "TEFLON" on the contact between the slide and spiral shaft.

The specifications cite a number of patents as relevant prior art: 1,354,782, 1,723,574, 1,739,182, 1,915,396, 2,447,094, 2,603,116, 2,753,748, 2,795,987, and 2,837,952.

This patent is cited in design patent D524,126 (July 4, 2006).

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