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US 8,806,989 B2Granted
Monkey wrench
OwnerYasushi Ohnoinventor
Life of this patent
Estimating the term…
Abstract
A positioning function when a width-across-flats dimension of a tool is adjusted and a function of preventing a deviation in the adjusted width-across-flats dimension are fulfilled by a projection of a flat spring part being fitted into each fitting recess. By selecting the line of a fitting recess to be used according to the standard of an object to be clamped such as a nut, the positioning function and the function of preventing a deviation can be easily and reliably fulfilled even for the width-across-flats dimensions of different standards.
Claims20
A monkey wrench, comprising:
- a wrench body including a fixed jaw;
- a movable jaw configured to advance and retreat on the wrench body to sandwich an object to be sandwiched between the movable jaw and the fixed jaw;
- and
- a space adjusting mechanism where a rack formed at the movable jaw engages a worm turnably disposed at the wrench body, wherein
- the wrench body includes a plurality of fitting depressed portions depressed on a side surface of the wrench body along an advancing/retreating direction of the movable jaw and a plurality of rows parallel to one another, the rows being formed of the plurality of fitting depressed portions at spaces from one another in a direction perpendicular to the advancing/retreating direction of the movable jaw, and
- the movable jaw includes:
- a leaf spring portion having:
- a base end side on the side surface of the movable jaw;
- and a distal end side facing the side surface of the wrench body, the leaf spring portion being formed as a leaf spring that is elastically deformable in a contact and separation direction with respect to the side surface of the wrench body;
- a protrusion positioned at the distal end side of the leaf spring portion, the protrusion protruding toward the side surface of the wrench body, the protrusion being formed to fit the fitting depressed portion;
- and
- a positioning unit configured to position the leaf spring portion in each position that allows fitting of the protrusion into the fitting depressed portion in each row among the plurality of the rows.
9 more elements
A monkey wrench, comprising:
- a wrench body including a fixed jaw;
- a movable jaw configured to slide on the wrench body to sandwich an object to be sandwiched between the movable jaw and the fixed jaw;
- and
- a space adjusting mechanism where a rack formed at the movable jaw engages a worm turnably disposed at the wrench body, wherein
- the movable jaw includes:
- a leaf spring portion having:
- a base end side firmly fixed to the side surface of the movable jaw, and a distal end side facing the side surface of the wrench body, the leaf spring portion being formed as a leaf spring that is elastically deformable in a contact and separation direction with respect to the side surface of the wrench body;
- and
- a protrusion positioned at the distal end side of the leaf spring portion, the protrusion protruding toward the side surface of the wrench body, wherein
- the leaf spring portion and the protrusion are disposed on both side surfaces of one side surface and another side surface on an opposite side of the one side surface in the movable jaw, and
- the wrench body includes:
- a plurality of fitting depressed portions depressed on one side surface of the wrench body such that the protrusion of the leaf spring portion is intermittently fitted when the movable jaw advances and retreats;
- and
- a continuous depressed groove depressed on another side surface on an opposite side of the one side surface of the wrench body, the continuous depressed groove extending along a moving trajectory of the protrusion to maintain fitting of the protrusion when the movable jaw advances and retreats.
11 more elements
Dependencies are inferred from the claim text.