Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1989-12-14
1991-02-26
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51219PC, 269 57, 269 69, B24B 1916
Patent
active
049953010
ABSTRACT:
A fixture for holding and positioning reamers and other objects for grinding has a support base connectable to a flat horizontal surface and its upper portion is positioned at an angle relative to the horizontal surface. A cylindrical sleeve rotatably mounted on the upper portion of the support base has an eccentric longitudinal bore and a radial flange at its rearward end. A cylindrical spindle rotatably received within the eccentric bore has a mounting flange at its forward end to receive a chuck for holding an object to be ground and a rear flange adjacent the sleeve radial flange. A handle extending from the sleeve rotates the sleeve about its longitudinal axis. An axial guide flange between the support base and sleeve moves the sleeve forward or rearward upon rotation of the sleeve. A retractable rod connected between the spindle flange and sleeve flange selectively locks the spindle and sleeve together for rotation as a unit about the longitudinal sleeve axis or releases the spindle for rotating only the spindle about its longitudinal axis relative to the sleeve. The spindle rotates partially about the centerline of the sleeve when locked with the sleeve whereby the object being ground is eccentrically rotated in a radial spiral motion when the handle is pivoted. When the axial guide flange is angularly positioned the object being ground moves simultaneously forward or rearward and in a radial spiral motion. When the spindle and sleeve are unlocked the object being ground may be rotated only about its own longitudinal axis and positioned to grind subsequent surfaces.
REFERENCES:
patent: 2607172 (1952-08-01), Ruolle
patent: 2672714 (1954-03-01), Wilson
patent: 2682736 (1954-07-01), Cowi
patent: 2701432 (1955-02-01), Kent
patent: 2797533 (1957-07-01), Bluemink
patent: 3298681 (1967-01-01), Youngblood
patent: 3571982 (1971-03-01), Ramge
patent: 4642942 (1987-02-01), Gurhring
patent: 4860497 (1989-08-01), Ohyu et al.
Roddy Kenneth A.
Schmidt Frederick R.
Shideler Blynn
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