# US 5,700,187 A · Tool to stopper and abrade concave and convex surfaces > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,700,187 A - Document ID: US5700187A - Status: Granted - Kind: A - Application number: 08/721,102 - Filed: 1996-09-26 - Granted: 1997-12-23 - Earliest claimed: 1996-09-26 - Inventors: Gaetano Balbi - Web page: https://patentgrep.com/patent/US5700187A ## CPC - B24D 15/04: resilient; with resiliently-mounted operative surface - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) ## Abstract This tool consists of a deformable plastic supporting base plate (1) bearing on its lower outer surface the stopper and abrasive materials, it further includes two upwards slanting interconnecting elements (2) in indeformable material or plates having a low deformability index, the lower end of these elements (2) being fastened to the transverse legs of the supporting base (1), two rotating cross journal (6) being secured to the upper end of the interconnecting elements (2), each journal (6) featuring at both ends threaded holes (9') as well as a longitudinal central boring (3', 4') with opposed threads, a screw (3, 4) half of which is left-threaded and the other half is right-threaded separated by a small control wheel (5), a guide (8) bearing the handgrips (10), provided with a central hole (11) through which the control wheel (5) is protruding, lateral slots (12) through which to fit the locking screws (9) into the borings (9') in both ends of the journals (6). The supporting base may be adjusted to the shape of the surface to be treated by changing the distance (L) between the journals (6) and the height (H1, H2) of the journals (6) above the supporting base (1). ## Claims ### Claim 1 Tool for stoppering and abrasion of concave and convex surfaces characterized in that it consists of: a usually rectangular supporting base plate (1) in elastic deformable material, the short sides of which are deemed to be the transverse legs and the longer sides are deemed to be the longitudinal legs of the rectangle, two upwards slanting interconnecting elements (2) in plates having a low deformability index, their lower ends being rigidly secured to the transverse ends of the supporting base (1); two rotating cross journals (6) each fixed to the upper end of the interconnecting elements (2), each journal (6) featuring at both ends threaded holes (9') as well as a s respectively right and left-handed threaded through-hole (3',4') drilled in the center of the journal (6), a screw (3,4,), half of which is left-threaded (3) and the other half is right-threaded (4) separated by a small control wheel (5) so that the threads (3,4) are meshing with corresponding central threads of the respective through-hole (3', 4') of the two cross journals (6), a guide (8) bearing the handgrip (10) usually having an upside-down U-shape, featuring a central hole (11) through which the control wheel (5) protrudes and lateral slots (12) through which to fit the screws (9) into the borings in the cross journals (6), thus blocking these journals (6) to the supporting guide (8). ### Claim 2 (depends on 1) Tool as described in claim 1, characterized in that the stopper materials as well as the abrasive surface are applied to the outer surface of the supporting base (1). ### Claim 3 (depends on 1) Tool as described in claim 1, characterized in that the supporting base (1) is strained according to the shape or profiles of the surfaces to be stoppered and abraded, by partially loosening the locking screws (9) of the cross journals (6) on the supporting guide (8) and by adjusting the small control wheel (5) and its screws (3,4) to change the distance (L) between the cross journals (6) or by manually adjusting the interconnecting elements (2) to change the height (H1,H2) of these journals (6) with respect to the supporting base (1), so that a variation of the distances (L) or (H1,H2) will bring the supporting base (1) in the desired shape, which will be maintained by tightening the locking screws (9) of the cross journals on the supporting guide (8). ### Claim 4 (depends on 3) Tool as described in claim 3, characterized in that to obtain a supporting base with a constant curved surface i.e. with a a circular cylindrical face, the heights (H1, H2) will be equal to M=(H1-H2)=0 simply by changing the distance (L) between the cross journals (6). ### Claim 5 (depends on 3) Tool as described in claim 3, characterized in that to obtain a supporting base with a variably curved surface, the heights (H1, H2) will be differentiated, with M=(H1-H2) .noteq.0. ### Claim 6 (depends on 1) Tool as described in claim 1, characterized in that the right-handed and left-handed threaded screws (3,4) may be removed and deformation of the supporting base (1) is manually achieved by blocking it with the utilization of the screws (9) linking the cross journals (6) to the guide (8).