Patent US4139256A successfully refreshed from Google Patents.
US4139256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact and method of making same
Assignee: Ennovi Advanced Mobility Solutions NJ Inc
•
Filing: 1977-09-15
•
Granted: 1979-02-13
•
Expires: 1997-09-15
Abstract
Abstract An electrical contact with a cylindrical bore having an internal pressure finger and two external retaining louvers, made from a blank of sheet metal wherein the outlines of each finger and louver are stamped as U-shaped cuts spaced in separate rows, the blank then being folded along a line between the respective rows and rolled into cylindrical form with the pressure finger on the inside and retaining louvers on the outside.
Inventors
- 👤 Jack Seidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:04
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/02; H01R13/10; H01R13/11; H01R13/111
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
A one-piece electrical contact having a cylindrical bore comprising, at the entrance end of the bore, a two-layer annular zone of conductive material terminating in a folded edge extending around substantially the entire circumference of said entrance end, at least one pressure finger being integral with the inner layer.
Claim 2
Dependent Claim
49 words
A one-piece electrical contact having a cylindrical bore comprising, at the entrance end of the bore, a two-layer annular zone of conductive material terminating in a folded edge extending around substantially the entire circumference of said entrance end, at least one pressure finger being integral with the inner layer.
Claim 3
Dependent Claim
19 words
An electrical contact according to claim 1 which includes a plurality of pressure fingers integral with the inner layer.
Claim 4
Dependent Claim
19 words
An electrical contact according to claim 1 which includes at least one retaining louver integral with the outer layer.
Claim 5
Dependent Claim
19 words
An electrical contact according to claim 3 which includes a plurality of retaining louvers integral with the outer layer.
Claim 6
Dependent Claim
16 words
An electrical contact according to claim 3 wherein no pressure finger is opposite a retaining louver.
Claim 7
Dependent Claim
34 words
An electrical contact according to claim 1 which includes a single-layer body portion of conductive material, the thickness of said body portion being greater than the thickness of either layer in the two-layer zone.
Claim 8
Dependent Claim
24 words
An electrical contact according to claim 6 wherein the thickness of the body portion is substantially equal to the thickness of the two-layer zone.
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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |