US 4,941,246 A · Rasping device

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.

Claims6

Dependent claims

An improved rasping device, said device comprising, in combination:

(a) an elongated blade having a front end and an opposite rear end joined by a middle portion bearing a plurality of rasping protrusions, said rear end bearing a narrow tang projecting rearwardly thereof along the longitudinal midline thereof;
and,
(b) an improved handle, said handle comprising, in combination, a front hollow shell having a closed front end and an open rear end defining a central cavity, said tang projecting through a slit in said closed front end into said cavity and being sealed thereto, a separate, generally cylindrical pinch tube in said cavity and bearing external threading and a transverse slot in the front end thereof into which the rear end of said tang wedgingly seats in said shell, and a rear cap having a flared rear peripheral portion connected to a forwardly projecting central tubular portion, the latter having a central passageway bearing internal threading, said tubular portion being screwed forward over and in contact with said pinch tube in said cavity to wedge it tightly around said rear end of said tang and cause said flared portion of said cap to abut the rear end of said shell, whereby said handle is held tightly on said blade.

Dependencies are inferred from the claim text.

Rasping device

Life of this patent

Rasping device

Life of this patent

Abstract

Claims6