Tools – Wrench – screwdriver – or driver therefor – Pivoted outer jaw
Patent
1995-04-17
1996-08-06
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Pivoted outer jaw
81167, B25B 1330
Patent
active
055423191
ABSTRACT:
The invention is an adjustable ratchet-style self-tightening wrench. The a wrench having a main body or handle, including a fixed jaw and a moveable jaw assembly which is pivotably attached to the main body. The handle has a first and a second end. The first end is for holding the wrench and applying force. The second end of the handle is shaped to form a fixed jaw having a substantially planar work surface. The handle also includes a recess near the fixed jaw end of the wrench with two leaf springs that are positioned to be biased against a pivot lug attached to the carriage block. The moveable jaw assembly includes a moveable jaw member, a traveler carriage block and a traveler carriage nut. The moveable jaw member has a traveler carriage segment at one end and a jaw working surface at it's other end. The moveable jaw assembly is pivotably attached to the main handle via a pivot lug that protrudes from the carriage block into the main handle recess. The pivot lug is held in place by the pivot pin at the center of the outsides of the handle recess. The carriage segment of the moveable jaw member includes threads to engage the traveler carriage block which is configured to function in the same manner as a conventional pipe wrench traveler carriage mechanism. The pivotal connection results in work pieces being held progressively tighter in the mouth of the wrench as stronger twisting forces are applied.
REFERENCES:
patent: 669483 (1901-03-01), Ingersoll
patent: 2629280 (1953-02-01), Milligan
patent: 3015246 (1962-01-01), Buyer
Dunbar Margaret M.
Smith James G.
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