US3557339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonconsumable, reusable stud welding ferrule
Assignee: USM Corp
•
Filing: 1969-04-03
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Granted: 1971-01-19
•
Expires: 1989-04-03
Abstract
Abstract Stud welding means and method including the use of a semipermanent ferrule which is connected to a welding gun by a ferrule holder. The ferrule is electrically conductive to sustain electron flow in a direction opposite to the direction of electron flow in the stud being welded.
Inventors
- 👤 Herbert F Rondeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/20; B23K9/201
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A stud welding ferrule comprising a substantially nonconsumable and reusable annular body of electrically conductive material, said body having outside walls converging toward one end of said body, said one end of said body being provided with notches providing communication from the interior to the exterior of said body when said one end is placed in contact with a support member to which a stud is to be welded.
Claim 2
Dependent Claim
69 words
A stud welding ferrule comprising a substantially nonconsumable and reusable annular body of electrically conductive material, said body having outside walls converging toward one end of said body, said one end of said body being provided with notches providing communication from the interior to the exterior of said body when said one end is placed in contact with a support member to which a stud is to be welded.
Claim 3
Dependent Claim
20 words
The invention according to claim 1 in which said body is provided with an interior ring of electrically insulative material.
Claim 4
Dependent Claim
15 words
The invention according to claim 2 in which said ring is removable from said ferrule.
Claim 5
Dependent Claim
22 words
The invention according to claim 2 in which said body material is of graphite and said interior ring is of boron nitride.
Claim 6
Dependent Claim
18 words
The invention according to claim 1 in which said body includes an exterior metal covering of beryllium copper.
Claim 7
Dependent Claim
65 words
A stud welding ferrule assembly comprising a substantially nonconsumable annular body of electrically conductive material, a coaxially telescoping holding means for said body, said body having axially inclined walls engageable with the ferrule holding means for assembling said ferrule therewith under compression while out of contact with the stud, and an interior ring of electrically insulative material seated in the central opening of said ferrule.
Claim 8
Dependent Claim
65 words
A stud welding ferrule assembly comprising a substantially nonconsumable annular body of electrically conductive material, a coaxially telescoping holding means for said body, said body having axially inclined walls engageable with the ferrule holding means for assembling said ferrule therewith under compression while out of contact with the stud, and an interior ring of electrically insulative material seated in the central opening of said ferrule.
Claim 9
Dependent Claim
12 words
The assembly of claim 6 wherein said ring is of boron nitride.
Claim 10
Dependent Claim
26 words
The assembly of claim 6 wherein the inner wall of said insulative ring extends at an angle within the range of from 6-15* to its axis.
References Cited (Backward Citations)
US2416204A
Cited
US3038989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |