Patent US3787798A successfully refreshed from Google Patents.
US3787798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy duty plug
Assignee: Hubbell Inc
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Filing: 1972-05-08
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Granted: 1974-01-22
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Expires: 1992-05-08
Abstract
Abstract An apparatus for containing an electrical plug, particularly where a large force is required to either insert or withdraw the plug from a mating outlet. Gripping wells are disposed on opposite sides of the plug which provide both a protective lip and a gripping lip. The protective lip avoids arc burns and electrical shocks during plug insertion. The gripping lip facilitates the applicaton of force during plug withdrawal. Sophisticated fabricaton of parts and the need for additional parts are both avoided by constructing the plug from routine component parts which are cooperatively configured to create the gripping wells upon assembly.
Inventors
- 👤 V Carissimi
- 👤 G Kress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:44
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/62; H01R13/629; H01R13/633; H01R13/6335; H01R13/58; H01R13/595
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
An electrical plug apparatus comprising: a blade holder for securing contact blades, said contact blade including terminal means for connecting to the conductors of an electrical cable; a plug housing for enclosing said terminal means on said contact blades; and fastener means for securing said blade holder to said plug housing, said blade holder and said plug housing being cooperatively configured to establish at least a single gripping well when assembled, said gripping well including a bottom surface with a ledge arising therefrom, said ledge extending completely around the periphery of said bottom surface, said bottom surface being rectangularly shaped and said ledge having four sides, said blade holder comprising only one side of said ledge, said gripping well providing a protective lip and a gripping lip, said protective lip shielding the operator from electrical hazard upon engagement of said plug into an outlet, and said gripping lip facilitating disengagement of said plug from the outlet.
Claim 2
Dependent Claim
156 words
An electrical plug apparatus comprising: a blade holder for securing contact blades, said contact blade including terminal means for connecting to the conductors of an electrical cable; a plug housing for enclosing said terminal means on said contact blades; and fastener means for securing said blade holder to said plug housing, said blade holder and said plug housing being cooperatively configured to establish at least a single gripping well when assembled, said gripping well including a bottom surface with a ledge arising therefrom, said ledge extending completely around the periphery of said bottom surface, said bottom surface being rectangularly shaped and said ledge having four sides, said blade holder comprising only one side of said ledge, said gripping well providing a protective lip and a gripping lip, said protective lip shielding the operator from electrical hazard upon engagement of said plug into an outlet, and said gripping lip facilitating disengagement of said plug from the outlet.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 wherein said plug housing includes a clamping means for securing the electrical cable to relieve said terminal means of stress.
Claim 4
Dependent Claim
28 words
The apparatus of claim 1 wherein said fastener means comprises screws extending through said blade holder and being received in screw receiving openings formed in said plug housing.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1 wherein a pair of said gripping wells are disposed on said plug.
Claim 6
Dependent Claim
37 words
The apparatus of claim 1 wherein: a pair of said gripping wells are disposed on said plug, and said plug housing includes a clamping means for securing the electrical cable to relieve said terminal means of stress.
Claim 7
Dependent Claim
28 words
The apparatus of claim 5 wherein said fastener means comprises screws extending through said blade holder and being received in screw receiving openings formed in said plug housing.
References Cited (Backward Citations)
GB716483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |