US4122699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for removing dents from sheet metal
Assignee: Individual
•
Filing: 1977-09-06
•
Granted: 1978-10-31
•
Expires: 1997-09-06
Abstract
Abstract A sheet metal dent removing tool for attachment to an impacting device, the tool tapering to a metal piercing tip and having a narrow side with opposite convex surfaces converging at their edges to form metal shearing ridges. The ridges, forming the outline of the broad side of the tool, are joined to a neck portion by rearwardly converging shoulders so that when the tool has penetrated the metal and is rotated 90° about its axis, the shoulders lock the tool to the metal whereby the impacting device can be used to pull the dented area back to its initial shape.
Inventors
- 👤 Cletus R. Logsdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:06
CPC Classifications
B; B21; B21D; B21D1/00; B21D1/06; Y; Y10; Y10S; Y10S72/00; Y10S72/705
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
In a device for removing dents in sheet metal, a tool comprising: a metal piercing head, means permitting use of said head with an impacting device whereby it can be driven through said sheet metal, said head having two integral, symmetrically opposite narrow sides tapering, where they merge, to a pointed metal piercing tip, said head also having two integral, symmetrically opposite broad sides tapering, where they merge, toward said tip, said broad sides converging along their side edges to form metal shearing ridges extending along the length of said head, and said broad side being convex in cross-section throughout whereby said head forms a double cuspid opening with inturned lips in said sheet metal when driven therethrough by means of said impacting device.
Claim 2
Dependent Claim
124 words
In a device for removing dents in sheet metal, a tool comprising: a metal piercing head, means permitting use of said head with an impacting device whereby it can be driven through said sheet metal, said head having two integral, symmetrically opposite narrow sides tapering, where they merge, to a pointed metal piercing tip, said head also having two integral, symmetrically opposite broad sides tapering, where they merge, toward said tip, said broad sides converging along their side edges to form metal shearing ridges extending along the length of said head, and said broad side being convex in cross-section throughout whereby said head forms a double cuspid opening with inturned lips in said sheet metal when driven therethrough by means of said impacting device.
Claim 3
Dependent Claim
141 words
A tool in accordance with claim 1 in which said head includes a neck portion spaced from said tip and the symmetrically opposite narrow sides taper, where they merge, from opposite sides of said neck portion to said tip, and rearwardly converging shoulders interconnecting said neck portion and said ridges adapted to drivingly engage the lips of said double cuspid opening in said metal when said tool is rotated about an axis extending lengthwise thereof after forming the opening and before it is withdrawn therefrom, the thickness of said neck portion being such as to provide shoulders with lip abutting surfaces of sufficient width to seat against and drivingly engage the lips in a manner to draw the surrounding metal outwardly without cutting through it when said tool is so rotated and properly directed driving force is applied to said head.
Claim 4
Dependent Claim
32 words
A tool in accordance with claim 2 in which said narrow sides extend convexly rearwardly from said tip to said neck portion and wherein said ridges extend convexly rearwardly about said axis.
Claim 5
Dependent Claim
36 words
A tool in accordance with claim 3 in which each of said rearwardly converging shoulders extends, along its median line, at an angle of from about 35° to about 55° with the axis of said head.
Claim 6
Dependent Claim
14 words
A tool in accordance with claim 4 in which said angle is about 45°.
Claim 7
Dependent Claim
23 words
A tool in accordance with claim 4 having a rearwardly diverging conical surface, contiguous with said neck portion, spaced rearwardly of said shoulders.
Claim 8
Dependent Claim
35 words
A tool in accordance with claim 6 having indicia thereon to the rear of said diverging conical surface to indicate the position of at least one of the narrow and broad sides of said head.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |