Patent US4305634A successfully refreshed from Google Patents.
US4305634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical plug guard
Assignee: MARKVA NEIL
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Filing: 1980-03-25
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Granted: 1981-12-15
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Expires: 2000-03-25
Abstract
Abstract The electrical plug guard comprises a disc member having a pair of elongated slots to frictionally receive the prongs of an electrical plug. The slots have centers offset with respect to each other along the length of the slots. The slots are effective to skew the prongs of the plug with respect to each other when the prongs are inserted in slots through the disc member. The disc member has a thickness sufficient to prevent finger contact with the prongs which are electrically active when partially inserted into an electrical plug outlet.
Inventors
- 👤 John S. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:31
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/44; Y; Y10; Y10S; Y10S439/00; Y10S439/911; Y10S439/915
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
70 words
An electrical plug guard comprising: (a) a disc means having a pair of elongated slots to frictionally receive the prongs of an electrical plug, (b) said slots having centers offset with respect to each other along the length of the slots, (c) said slots being effective to skew the prongs of the plug with respect to each other when the prongs are inserted in the slots through the disc means.
Claim 2
Dependent Claim
70 words
An electrical plug guard comprising: (a) a disc means having a pair of elongated slots to frictionally receive the prongs of an electrical plug, (b) said slots having centers offset with respect to each other along the length of the slots, (c) said slots being effective to skew the prongs of the plug with respect to each other when the prongs are inserted in the slots through the disc means.
Claim 3
Dependent Claim
34 words
A guard as defined in claim 1 wherein the disc means has a thickness sufficient to prevent finger contact with the prongs which are electrically active when partially inserted into an electrical plug outlet.
Claim 4
Dependent Claim
31 words
A guard as defined in claim 1 wherein the disc means has a width sufficient to extend outwardly from the periphery of said plug having its prongs inserted in said slots.
Claim 5
Dependent Claim
35 words
A guard as defined in claim 1 wherein the disposition of the slots with respect to each other is effective to cause each of the prongs inserted therein to twist along its own longitudinal axis.
Claim 6
Dependent Claim
23 words
A guard as defined in claim 1 wherein said disc means includes an opening to receive a ground prong of an electrical plug.
Claim 7
Dependent Claim
30 words
A guard as defined in claim 1 wherein one of the slots is longer than the other slot to receive electrical prongs having different lengths along their widest cross-sectional measurement.
Claim 8
Dependent Claim
21 words
A guard as defined in claim 1 wherein the disc means is composed of rigid, non-resilient material which is electrically non-conductive.
Claim 9
Dependent Claim
17 words
A guard as defined in claim 1 wherein the slots are parallel with respect to each other.
Claim 10
Dependent Claim
43 words
A guard as defined in claim 1 wherein the disc means comprises a disc member having a shaped outer contour and a thickness sufficient to prevent finger contact with said prongs which are electrically active when partially inserted into an electrical plug outlet.
Claim 11
Dependent Claim
22 words
A guard as defined in claim 9 wherein the disc member has a circular shape and a thickness of about 5/32 inch.
Claim 12
Dependent Claim
41 words
A guard as defined in claim 9 wherein the thickness of the disc means is effective to cause the plug to be electrically disengaged from an electrical outlet when a finger is inserted between the disc means and the electrical outlet.
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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |