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US 4,515,044 AGranted
Quick change ratchet wrench
OwnerLarry V. Harstadinventor
Life of this patent
Estimating the term…
Abstract
A cylinder is rotatably located in a head of a wrench. Ratchet teeth located in a groove around the periphery of the cylinder acts in conjunction with a pawl to secure the cylinder in position and to provide ratchet action. An insert with axially located socket rotates with the cylinder to act on a fastener.
Claims4
A quick change ratchet wrench comprising:
- a handle having an integral head on one end with said head having a cylindrical shaped opening extending in from one side of the head, and a concentric smaller diameter circular opening extending in from the other side of the head to form a lip, a hollow cylinder sized to rotatably fit in the cylindrical shaped opening with said cylinder having a narrow recess with ratchet teeth around the periphery and having a lip adjacent opposite sides of the hollow interior, an insert sized to fit inside and to move with the hollow cylinder and contained by the lip in the cylinder and the lip in the opening in the head with said insert having means for joining to a fastener, a ratchet teeth contacting pawl pivotally mounted in the handle with said pawl having a resiliently held lever arm extending outside the handle to permit the pawl to be moved out of contact with the ratchet teeth to permit entry and removal of the cylinder from the head.
Dependencies are inferred from the claim text.