Wrench head

Patent metadata

Field	Value
Publication number	US-11224958-B2
Application number	US-201916659944-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Oct 22, 2019
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

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 surface, second first-jaw arcuate convex contact surface, third first-jaw arcuate convex contact surface, and first-jaw planar contact surface. The second jaw is coupled with and pivotable relative to the first jaw and comprises a 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.

First claim

What is claimed is:

1. A wrench head, comprising:
a working axis;
a first jaw, comprising a first-jaw arcuate convex contact surface, a second first-jaw arcuate convex contact surface, a third first-jaw arcuate convex contact surface, and a first-jaw planar contact surface, located between the second first-jaw arcuate convex contact surface and the third first-jaw arcuate convex contact surface;
a second jaw, coupled with the first jaw, pivotable relative to the first jaw, and comprising a second-jaw arcuate convex contact surface and a 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:
a first-jaw virtual circle is perpendicular to the first-jaw arcuate convex contact surface, to the second first-jaw arcuate convex contact surface, and to the third first-jaw arcuate convex contact surface, has a single point contact with each one of the first-jaw arcuate convex contact surface, the second first-jaw arcuate convex contact surface, and the third first-jaw arcuate convex contact surface, 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 and to the second-jaw planar contact surface, has a single point contact with the 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.

2. The wrench head according to claim 1 , wherein, when the second jaw is in an open second-jaw orientation relative to the first jaw, the first-jaw virtual circle is perpendicular to the second-jaw arcuate convex contact surface and to the second-jaw planar contact surface, is not in contact with the second-jaw arcuate convex contact surface, has a single point contact with the second-jaw planar contact surface, and does not intersect either the second-jaw arcuate convex contact surface or the second-jaw planar contact surface.

3. The wrench according to claim 2 , wherein:
the second jaw further comprises a second second-jaw planar contact surface; and
when the second jaw is in the 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-jaw planar contact surface, and to the second second-jaw planar contact surface, has a single point contact with the second-jaw arcuate convex contact surface, and intersects each of the second-jaw planar contact surface and the second second-jaw planar contact surface at only two points.

4. The wrench head according to claim 3 , wherein, when the second jaw is in the open 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-jaw planar contact surface, and to the second second-jaw planar contact surface, is not in contact with any one of the second-jaw arcuate convex contact surface or the second second-jaw planar contact surface, has a single point contact with the second-jaw planar contact surface, and does not intersect any one of the second-jaw arcuate convex contact surface, the second-jaw planar contact surface, or the second second-jaw planar contact surface.

5. The wrench head according to claim 3 , wherein the second-jaw planar contact surface is located between the second second-jaw planar contact surface and the second-jaw arcuate convex contact surface.

6. The wrench head according to claim 3 , wherein:
the second jaw further comprises a second second-jaw arcuate convex contact surface, and
the second-jaw planar contact surface and the second second-jaw planar contact surface are located between the second-jaw arcuate convex contact surface and the second second-jaw arcuate convex contact surface.

7. The wrench head according to claim 2 , further comprising a compression spring located between the first jaw and the second jaw, and wherein the compression spring biases the second jaw relative to the first jaw from the open second-jaw orientation to the closed second-jaw orientation.

8. The wrench head according to claim 7 , wherein:
the second jaw further comprises a first first-jaw interface surface; and
the first jaw further comprises a first second-jaw interface surface, configured to contact the first first-jaw interface surface when the second jaw is in the open second-jaw orientation.

9. The wrench head according to claim 7 , wherein:
the second jaw further comprises a second first-jaw interface surface; and
the first jaw further comprises a second second-jaw interface surface, configured to contact the second first-jaw interface surface when the second jaw is in the closed second-jaw orientation.

10. The wrench head according to claim 2 , wherein, when the second is in the open second-jaw orientation relative to the first jaw, and the third jaw is in an open 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, is not in contact with the third-jaw arcuate convex contact surface, intersects the third-jaw planar contact surface, and does not intersect the third-jaw arcuate convex contact surface.

11. The wrench head according to claim 10 , wherein:
the third jaw further comprises a second third-jaw arcuate convex contact surface, located between the third-jaw arcuate convex contact surface and the third-jaw planar contact surface; and
when the second jaw is in the closed second-jaw orientation relative to the first jaw, and the third jaw is in the closed third-jaw orientation relative to the second jaw, the first-jaw virtual circle is perpendicular to the third-jaw arcuate convex contact surface, to the third-jaw planar contact surface, and to the second third-jaw arcuate convex contact surface, has a single point contact with each of the third-jaw arcuate convex contact surface and the second third-jaw arcuate convex contact surface, and intersects the third-jaw planar contact surface at only two points.

12. The wrench head according to claim 11 , wherein, when the second jaw is in the open second-jaw orientation relative to the first jaw and the third is in the open third-jaw orientation relative to the second jaw, the first-jaw virtual circle is perpendicular to the third-jaw arcuate convex contact surface, to the third-jaw planar contact surface, and to the second third-jaw arcuate convex contact surface, is not in contact with any one of the third-jaw arcuate convex contact surface or the second third-jaw arcuate convex contact surface, intersects the third-jaw planar contact surface, and does not intersect any one of the third-jaw arcuate convex contact surface or the second third-jaw arcuate convex contact surface.

13. The wrench head according to claim 10 , further comprising a torsion spring, located between the second jaw and the third jaw and biasing the third jaw relative to the sec

Assignees

• Boeing Co

Inventors

• Coffland Donald W

Classifications

• B25B13/28 Primary

  the jaws being pivotally movable · CPC title

• B25B13/481

  for operating in areas having limited access · CPC title

• B25B23/0007

  Connections or joints between tool parts · CPC title

• B25B13/46

  of the ratchet type, for providing a free return stroke of the handle · CPC title