1989-09-19
1990-07-17
Terrell, William E.
Metal working
Filing
29 80, 16114R, 279 42, 279 48, 279101, B23D 7104, B23D 7106
Patent
active
049412469
ABSTRACT:
The improved rasping device can be either a rasp or file and includes an elongated blade with a plurality of rasping protrusions on the middle portion thereof and with an integral narrow tang extending rearwardly thereof along the longitudinal midline thereof. The tang extends into the closed front end of a hollow shell defining a central cavity and is sealed thereto. The shell has an open rear end. A generally cylindrical externally threaded pinch tube grips the rear end of the tang, which is wedgingly received in a transverse slot in the front end of the pinch tube. The slot may be lined with teeth or the like to increase the grip on the tang, and the tang can be partially pinned thereto. The shell and pinch tube define with a rear cap the handle of the device and can be of metal, plastic or the like. The cap has a flared peripheral portion and a forwardly projecting central tubular portion bearing an internally threaded passageway screwed forward over the pinch tube to force it to tightly grip the tang and rigidly hold the handle in place. The pinch tube can be forwardly flared to increase the gripping action on the tang when the cap is screwed thereover.
REFERENCES:
patent: 208256 (1878-09-01), Millspaugh
patent: 288045 (1883-11-01), French
patent: 1243310 (1917-10-01), Littman
patent: 2573325 (1951-10-01), Fowlie
patent: 2676811 (1954-04-01), Kindley
patent: 4327465 (1982-05-01), Moritsch
Nist Donald E.
Terrell William E.
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