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US Patent: 2,706,923
Multiple Pivoted Jaw Adjustable Wrench
Patentee:
Nils Kvaerne (exact or similar names) - Oslo, Norway

USPTO Classifications:
81/126, 81/90.1

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches

Assignees:
Aktiebolaget B. A. Hjorth & Co. - Stockholm, Sweden

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Apr. 06, 1953
Granted: Apr. 26, 1955

Patent Pictures:
Nils Kvaerne patent April 25, 1955
USPTO (New site tip)
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Description:
Self-adjusting nut wrench with two movable jaw faces. The specifications note the geometry of the facing "wave" faces on the two jaws shown will work for square and hex nuts but is not suited for octagonal nuts.

The specifications cite U.S. patent no. 1,790,411 and two European patents as references. The design was patented in several European countries.

B. A. Hjorth is better known as BAHCO.

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