US4352540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical plug
Assignee: Individual
•
Filing: 1980-07-23
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Granted: 1982-10-05
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Expires: 2000-07-23
Abstract
Abstract An improved electrical plug comprises two housings, wherein the lower housing has two stop blocks formed symmetrically on the inside rim thereof, a cross-shaped division plate on its center portion, a plurality of protrusions provided on both surfaces of the stop blocks and the division plate for securing two twisted conducting prongs in their appropriate position by engaging orifices at the end surfaces of the conducting prongs with the protrusions for quick and safe connection and/or disconnection with respect to the lower housing.
Inventors
- 👤 Liang-Huang Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/46; H01R13/502; H01R13/512; H01R2103/00; H01R24/00; H01R24/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
An improved electrical plug comprising elongated members for conveying electrical energy and a housing having first and second housing elements, at least one of said housing elements including means for fixing said elongated members in predetermined positions in said housing, and an opening in said housing permitting said elongated members to communicate between the exterior and interior of said housing, said fixing means including a wall disposed in said at least one housing element, said wall being disposed generally perpendicular to a major axis of said elongated members, and a pair of stop blocks disposed in parallel, spaced relationship to said wall in said at least one of said housing elements, the spacing between said wall and said stop blocks being sized to receive a portion of said elongated members, said wall and said stop blocks each having at least one protuberance for engaging said elongated members.
Claim 2
Dependent Claim
147 words
An improved electrical plug comprising elongated members for conveying electrical energy and a housing having first and second housing elements, at least one of said housing elements including means for fixing said elongated members in predetermined positions in said housing, and an opening in said housing permitting said elongated members to communicate between the exterior and interior of said housing, said fixing means including a wall disposed in said at least one housing element, said wall being disposed generally perpendicular to a major axis of said elongated members, and a pair of stop blocks disposed in parallel, spaced relationship to said wall in said at least one of said housing elements, the spacing between said wall and said stop blocks being sized to receive a portion of said elongated members, said wall and said stop blocks each having at least one protuberance for engaging said elongated members.
Claim 3
Dependent Claim
36 words
The plug as set forth in claim 1, further including a divider plate disposed in said at least one housing element, said divider plate being arranged generally parallel to said major axis and intersecting said wall.
Claim 4
Dependent Claim
40 words
The plug as set forth in claim 2, wherein said at least one housing element includes a rim at the outer periphery thereof and wherein said stop blocks contact said rim and engage said rim at generally a right angle.
Claim 5
Dependent Claim
34 words
The plug according to claim 3, wherein said divider plate and said stop blocks are reinforced with plastic material on both the top portion and the bottom portion to increase the shock resistance thereof.
Claim 6
Dependent Claim
138 words
The plug as claimed in claims 1, 2, 3, or 4, wherein said elongated members comprise a pair of prongs, each of said prongs defining, in a cross section taken through the major axis thereof, a rectangle, the central portion of each prong being twisted approximately 90° with respect to mating portions of said prongs, said central portions forming a planar surface and including a fastening means thereat for securing the conductor of an electrical cable thereto, the ends of said prongs remote from the mating portions thereof including an end which is formed at approximately a 90° angle to the central portion thereof, said end portion having a pair of orifices on each side of said end for engaging the protuberances on said wall and said stop blocks of said at least one of said housing elements.
Claim 7
Dependent Claim
23 words
The plug according to claim 5, wherein the ends of said elongated members include slits disposed between adjacent pairs of the orifices therein.
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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |