SANDING HAND TOOL

• US 3,699,729 A
• Filed: 05/14/1971
• Issued: 10/24/1972
• Est. Priority Date: 05/14/1971
• Status: Expired due to Term

• Current Assignee: Bruce Winterbottom, Francis J. Garvey
• Original Assignee: Bruce Winterbottom, Francis J. Garvey
• Inventors: Garvey, Francis J., Winterbottom, Bruce
• Primary Examiner(s): Simpson, Othell M.
• Application Number:
  US05/143,316
• Time in Patent Office: 529 Days
• Field of Search: 51/358,372,381,391,392,393
• US Class Current: 451/523
• CPC Class Codes: B24D 15/023 using in exchangeable arrangement a layer of flexible material

Abstract

A sanding hand tool comprises an abrasive-surfaced strip of cloth in narrow endless belt form looped around a bow-shaped holding member of resilient metal having a convex rear surface on which a rear, reserve portion of the belt snugly fits and a concave front across which the remainder of the belt is exposed to provide an operative portion stretched under yieldable tension.

Claims

1. A sanding hand tool including a holding member comprising a strip of spring metal formed in generally elongated bow shaped, and an endless belt of abrasive-surfaced material stretched around the holding member and constraining the member under tension so that the portion of the belt spanning the concave opening between the ends of the member is maintained in tension and is yieldable rearwardly into the concavity of the bow shape when pressed against work being sanded.

2. A sanding hand tool as claimed in claim 1, in which the strip comprising the holding member is continuous and forms a rear bow portion of arcuate shape of relatively short radius and a front bow portion of arcuate shape of greater radius.

3. A sanding hand tool as claimed in claim 1, in which a grip or handle element is provided at substantially the central area of the rear of the holding member, and said element has edge flanges curved inwardly over the edges of the member and spaced apart to overlap the side edges of the belt and hold the belt in place on the member.

4. A sanding hand tool as claimed in claim 2, in which the ends of the strip forming the holding member are abutted at substantially the center of the rear bow portion, and including a grip element clamping said ends together and forming a handle by which the tool may be held in use.

5. A sanding hand tool as claimed in claim 4, in which the grip element comprises a short length of metal providing a slot receiving the ends of the strip and having longitudinal margins curved over the strip, and including fastening means standing through the ends of the strip and the grip element securing the grip element in place.

6. A sanding hand tool comprising the combination of a holding member and a sanding element, said holding member comprising a resilient metal strip formed into the shape of a segment having an arcuate rear portion Subtended by a straight chord front portion, and said sanding element comprising an endless belt of flexible strip material having an abrasive surface on one side and being adapted to be looped over and around the holding member, and being so dimensioned relative to the holding member as to require deformation of the holding member chord into concave curvature in order to receive the belt, whereby the sanding element mounted on the holding member forms a segmental shape in which an operative portion of the element is stretched as a straight chord subtending an arcuate portion extending around the arcuate rear portion of the holding member.

7. A sanding hand tool as claimed in claim 1, in which the holding member is a single length of spring metal formed in the shape of an open bow having the belt stretched around it and providing a straight chord portion extending between the free ends of the member and subtending the arc thereof.