US 11,235,440 B2Granted

Wrench head

AssigneeThe Boeing Company

InventorDonald W. Coffland

Life of this patent

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Abstract

A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises first-jaw arcuate convex contact surfaces. The second jaw is coupled with and pivotable relative to the first jaw and comprises a second-jaw arcuate convex contact surface, a second second-jaw arcuate convex contact surface, and a second-jaw planar contact surface. The third jaw is coupled with and pivotable relative to the second jaw and comprises a third-jaw arcuate convex contact surface and a third-jaw planar contact surface.

Claims20

Dependent claims

A wrench head, comprising:

a working axis;
a first jaw, comprising first-jaw arcuate convex contact surfaces;
a second jaw, coupled with the first jaw, pivotable relative to the first jaw, and comprising a second-jaw arcuate convex contact surface, a second second-jaw arcuate convex contact surface, and a second-jaw planar contact surface, and wherein the second second-jaw arcuate convex contact surface is located between the second-jaw arcuate convex contact surface and the second-jaw planar contact surface;
and
a third jaw, coupled with the second jaw, pivotable relative to the second jaw, and comprising a third-jaw arcuate convex contact surface and a third-jaw planar contact surface;
and
wherein:
the first-jaw arcuate convex contact surfaces are three or more in number;
a first-jaw virtual circle, perpendicular to the first-jaw arcuate convex contact surfaces and having a single point contact with each of the first-jaw arcuate convex contact surfaces, is centered about the working axis and is perpendicular to the working axis;
when the second jaw is in a closed second-jaw orientation relative to the first jaw, the first-jaw virtual circle is perpendicular to the second-jaw arcuate convex contact surface, to the second second-jaw arcuate convex contact surface, and to the second-jaw planar contact surface, has a single point contact with each of the second-jaw arcuate convex contact surface and the second second-jaw arcuate convex contact surface, and intersects the second-jaw planar contact surface at only two points;
and
when the second jaw is in the closed second-jaw orientation relative to the first jaw and the third jaw is in a closed third-jaw orientation relative to the second jaw, the first-jaw virtual circle is perpendicular to the third-jaw arcuate convex contact surface and to the third-jaw planar contact surface, has a single point contact with the third-jaw arcuate convex contact surface, and intersects the third-jaw planar contact surface at only two points.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

A wrench head, comprising:

a working axis;
a first jaw, comprising first-jaw arcuate convex contact surfaces;
a second jaw, coupled with the first jaw, pivotable relative to the first jaw, and comprising a second-jaw arcuate convex contact surface, a second second-jaw arcuate convex contact surface, and a second-jaw planar contact surface, and wherein the second second-jaw arcuate convex contact surface is located between the second-jaw arcuate convex contact surface and the second-jaw planar contact surface;
and
a third jaw, coupled with the second jaw, pivotable relative to the second jaw, and comprising a third-jaw arcuate convex contact surface and a third-jaw planar contact surface;
and
wherein:
the first-jaw arcuate convex contact surfaces are three or more in number;
a first-jaw virtual circle, perpendicular to the first-jaw arcuate convex contact surfaces and having a single point contact with each of the first-jaw arcuate convex contact surfaces, is centered about the working axis and is perpendicular to the working axis;
when the second jaw is in a closed second-jaw orientation relative to the first jaw, the first-jaw virtual circle is perpendicular to the second-jaw arcuate convex contact surface, to the second second-jaw arcuate convex contact surface, and to the second-jaw planar contact surface, has a single point contact with each of the second-jaw arcuate convex contact surface and the second second-jaw arcuate convex contact surface, and intersects the second-jaw planar contact surface at only two points;
and
when the second jaw is in the closed second-jaw orientation relative to the first jaw and the third jaw is in a closed third-jaw orientation relative to the second jaw, the first-jaw virtual circle is perpendicular to the third-jaw arcuate convex contact surface and to the third-jaw planar contact surface, has a single point contact with the third-jaw arcuate convex contact surface, and intersects the third-jaw planar contact surface at only two points.

9 more elements