Spin-blast tool

Details Spin-blast tool Spin-blast tool

1981-06-26

1987-11-10

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51439, 239252, 239256, 188296, B24C 306

Patent

active

047048263

ABSTRACT:
An improved spin-blast tool having a stationary handle with coaxial inner and outer pipes. The inner pipe, connected to a jet head, rotates at high speed relative to the stationary outer pipe. A plenum defined by the outer surface of the inner pipe and the inner surface of the outer pipe, as well as by opposed lateral sealed bearings, supporting the inner pipe within the outer pipe, define a plenum which is filled with a viscous fluid. The inner pipe supports radially outwardly extending vanes which work against the viscous fluid, thereby slowing rotation and preventing damage to the inner shaft and the jet head. An axial groove along the outer peripheral surface of the inner pipe leaks small amounts of the viscous fluid beneath at least one of the sealed bearings for the purpose of lubricating a stationary shaft seal which comes in contact with rotating members.

REFERENCES:
patent: 1090530 (1914-03-01), Grube
patent: 2465154 (1949-03-01), Harstick
patent: 3029028 (1962-04-01), Skerritt
patent: 3137974 (1964-06-01), Kirkland
patent: 3292863 (1966-12-01), Nelson
patent: 3902276 (1975-09-01), Jarvis
patent: 4314427 (1982-02-01), Stoltz

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