Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1984-06-22
1985-12-10
Olszewski, Robert P.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51436, B24C 306
Patent
active
045570795
ABSTRACT:
Apparatus for blast-cleaning the interior surface of a pipe includes a main housing that travels the length of the pipe, and rotatably supports a blast nozzle. A nozzle support shaft carried by the housing rotates freely, reactively to air carrying abrasive media and forced through the nozzle under high pressure. Since the air is directed through a non-rotating conduit to the shaft, a gasket is interposed between the rotating and non-rotating components. To prevent the abrasive media from penetrating the shaft support bearings of the housing with obviously destructive effects, a gap is maintained between the housing and a junction housing in which the non-rotating conduit is mounted. Leakage that does occur past the gasket is dispersed to the ambient atmosphere through the gap, before it can impinge upon the bearings. The non-rotating conduit is threadedly advanceable within the junction housing, so as to correspondingly, selectively adjust the extent to which the gasket is compressed. In each position to which the conduit is selectively adjusted, it can be locked, to preserve the adjusted compression of the gasket.
REFERENCES:
patent: 1953311 (1934-04-01), Peik
patent: 2358557 (1944-09-01), Boyd et al.
patent: 3137974 (1964-06-01), Kirkland
patent: 3835587 (1974-09-01), Hall
patent: 3902276 (1975-09-01), Jarvis
patent: 4314427 (1982-02-01), Stoltz
patent: 4439954 (1984-04-01), Bennett
Empire Abrasive Equipment Corporation
Olszewski Robert P.
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