Tools – Wrench – screwdriver – or driver therefor – Spanner
Patent
1990-05-25
1991-02-26
Parker, Roscoe V.
Tools
Wrench, screwdriver, or driver therefor
Spanner
81488, 29283, B25B 1348
Patent
active
049952994
ABSTRACT:
A tool is provided for removing plastic grommets embedded within concrete to be post-tensioned. The tool has a conical shaped head for insertion into the grommet sleeve. The tool includes a wide bore that extends through the entire tool which slips over a central protrusion of the post-tension concrete grommet. The bore is open along its entire length so that the head may be slipped over a cable used to post-tension the concrete. The conical section further includes 2 radially extending slots spaced 90.degree. apart which extend from the bore to the outer periphery of the conical section. These slots transmit the torque to the grommet through wings connected to the sleeve. A hole is provided within the tool for connection of a handle to the tool. The handle manually turns the tool about the axis of the bore, thereby delivering torque to the grommet and releasing it from its embedded position within the concrete. The tool head is uniquely shaped to fit snugly into the grommet and over the protrusion and wings of the sleeve. The conical head allows the tool to be used on grommets of various sizes.
REFERENCES:
patent: 2659256 (1953-11-01), Palmer
Illich Russell W.
Parker Roscoe V.
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