Electrical extension cord

Details Electrical extension cord Electrical extension cord

2005-08-23

2005-08-23

Reichard, Dean A. (Department: 2831)

Electricity: conductors and insulators

Conduits, cables or conductors

Accessories

C174S07400A, C439S620180

Reexamination Certificate

active

06933447

ABSTRACT:
An electrical extension cord that has a male or female adapter, a cylindrical wire casing and a connecting clamp. The adapter has a circular face, a cylindrical upper portion and a conical lower portion. If a male adapter is employed, two to four prongs protrude from the face in a perpendicular direction. If a female adapter is employed, two to four openings are embedded in the face. The prongs and openings are in electrical communication with a power supply. The width of the upper portion is equal to the diameter of the face. In contrast, the lower portion narrows continuously to a minimum diameter that is preferably slightly less than the outer diameter of the casing. The clamp consists of a top plate and a bottom plate that are fastened together by bolts.

REFERENCES:
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patent: 2422393 (1947-06-01), Bryant
patent: 2528971 (1950-11-01), Philips
patent: 2721717 (1955-10-01), Wales
patent: 2728058 (1955-12-01), Phalen
patent: 3316523 (1967-04-01), Trangmar
patent: 4679877 (1987-07-01), Ahroni
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patent: 4998891 (1991-03-01), Bresko
patent: 5069634 (1991-12-01), Chiarolanzio
patent: 5529522 (1996-06-01), Huang
patent: 5586898 (1996-12-01), Anderson et al.
patent: 5906515 (1999-05-01), Lin
patent: 6517373 (2003-02-01), Finke

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