Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1989-06-01
1991-03-05
Parker, Roscoe V.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
B24B 1502
Patent
active
049967991
ABSTRACT:
A tool is provided for use in repairing a silcock which has a valve stem, a washer and a valve seat axially aligned with the silcock neck with the forward face of the washer being selectively rotatably driven by the stem into and out of sealing abutment with the collar of the valve seat. The tool includes a rod with a bit end and a working end. The bit end is adapted for coupling with a drilling implement for selectively rotating the rod about its longitudinal axis. The working end has a coaxial bore. A shaft has an attachment end which is snugly insertable into the bore. Preferably, the bore and the attachment end have complimentary threads to secure the shaft to the rod. Thus this shaft will rotate coaxially with the rod. A grinding head is fixed to the free end of said shaft to rotate with it. The grinding head is shaped to slide with the shaft and the rod into the silcock neck. The grinding head has a forward grinding face contoured similar to the forward face of the washer and at least as wide as the valve seat collar to smooth the collar to sealing conformance with the washer. Preferably, the grinding face will be substantially conical and will have a knurl protruding from its tip to guide the grinding head into proper alignment on the valve seat collar. The rear edge of the grinding head may also be bevelled to prevent damage to the tool or the pipe during withdrawal from the silcock.
REFERENCES:
patent: 2454068 (1948-11-01), Kuhlman
patent: 2636325 (1953-04-01), Livingston
patent: 2698446 (1955-01-01), Apostoli
patent: 2748547 (1956-06-01), Davies et al.
patent: 3258882 (1966-07-01), Cohen
patent: 3946526 (1976-03-01), Reutter
patent: 4833835 (1989-05-01), Van Buren
Baca William K.
Pound Randall W.
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