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US 11,235,441 B2Granted
Wrench
AssigneeAlbertson Enterprises, LLC
InventorsWeikai Yang, Robert V. Albertson, Jingrong Ye, Timothy Florian
Life of this patent
Estimating the term…
Abstract
A wrench has a head with an inside cylindrical wall surrounding a body with ramps. Cylindrical rollers located between the ramps and the cylindrical wall of the head are moved into wedging positions relative to the ramps and the inside cylindrical wall with permanent magnets located in a cage assembly anchored on the body.
Claims21
A wrench for rotating a fastener comprising:
- a handle,
- a head joined to the handle,
- said head having an inside cylindrical wall surrounding an opening,
- a body located in the opening and rotatably retained on the head,
- said body including a wall with members engageable with a fastener for rotating the fastener,
- said body also including a plurality of protrusions extended toward the inside cylindrical wall of the head,
- each protrusion including a ramp inclined outwardly toward the inside cylindrical wall of the head,
- a cylindrical roller engaging each ramp and the inside cylindrical wall of the head,
- a cage located around the body confining each cylindrical roller to a contiguous location relative to a ramp and the inside cylindrical wall of the head,
- magnets subjecting the cylindrical rollers to magnetic forces for moving and holding the cylindrical rollers into engagement with the ramps and the inside cylindrical wall of the head,
- said cage and protrusions including cooperating members that anchor the cage on the protrusions to prevent movement of the cage relative to the body and hold the cylindrical rollers in the contiguous locations relative to the ramps and the inside cylindrical wall of the head whereby movement of the handle in one direction rotates the head and wedges the cylindrical rollers between the ramps and the inside cylindrical wall of the head and rotates the body, and movement of the handle in a direction opposite the one direction releases the wedging of the cylindrical rollers with the ramps and the inside cylindrical wall of the head and inhibits rotation of the body relative to the head.
8 more elements
A wrench for rotating a fastener comprising:
- a handle,
- a head joined to the handle,
- said head having an inside cylindrical wall surrounding an opening,
- a body located in the opening and rotatably retained on the head,
- said body including a wall with members engageable with a fastener for rotating the fastener,
- said body including ramps inclined outwardly toward the inside cylindrical wall of the head,
- a cylindrical roller engaging each ramp and the inside cylindrical wall of the head,
- an annular cage located around the body confining each cylindrical roller to a location on a ramp,
- magnets subjecting the cylindrical rollers to magnetic forces for moving and holding the cylindrical rollers into engagement with the ramps and the inside cylindrical wall of the head whereby all of the cylindrical rollers concurrently engage the ramps and the inside cylindrical wall of the head, and
- said cage and body including cooperating members that anchor the cage on the body to prevent movement of the cage relative to the body and hold the cylindrical rollers contiguous to the ramps and the inside cylindrical wall of the head whereby the rollers subjected to the magnetic forces wedge between the ramps and the inside cylindrical wall of the head so that movement of the handle in one direction rotates the head and the body, and movement of the handle in a direction opposite the one direction releases the wedging of the cylindrical rollers with the ramps and cylindrical wall of the head and inhibits rotation of the body relative to the head.
7 more elements
Dependencies are inferred from the claim text.