Electricity: conductors and insulators – Boxes and housings – Hermetic sealed envelope type
Patent
1995-09-28
1998-11-10
Kincaid, Kristine L.
Electricity: conductors and insulators
Boxes and housings
Hermetic sealed envelope type
H01R 1352
Patent
active
058346902
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a case intended for safe covering male and female extension cord plug connections, especially for outdoors use to connect electrical droven hand tools and portable apparatus such as vacuum cleaners to the mains. Problems possibly occuring are well-known, for example
The case according to the invention is designed to avoid all these dangerous situations and consists of a nearly cylindrical tube with hemispherical fronts. The container is partited in a upper and lower part in a plane coinciding with its longitudinal centerline, while both parts are connected to each other by a hinge-joint, being a thin material layer created during the injection molding process.
After being closed by a click fastener system, the case parts are effectually secured.
Adults are enabled to unbold by simultaneously putting the thumb into the free counter-sink space on the shell circumference near it and pulling the grip.
For safety reasons construction details, dimensions and required force are such as to make this handling impossible for infants.
Waterproof plug connections already on the market and guaranteed for under water use as well, are serving a different purpose and subjected to governmental requirments and rules, as such not competitive with the case according to this invention which is adapt for domestic use in circumstances where spatter and rain-proof sealing is considered as very essential to protect users of portable current consumers against electric shock which can be fatally.
Short circuiting can also be caused by corroded electrodes due to penetrating moisture and wet when extension cords are outdoors used and that is where the invention emphatic provides for as well.
Plug cases not equiped with this provision do not meet basic safety secure against danger being connected with the use of electrical tools and equipment in the open air under bad wether conditions an/or dusty enviromental conditions. For said reasons the innovative vallue of the case according to the invention shall be concentrated to the lapping sealing along the contacting surfaces of upper and lower case part in closed position, especially at the spot of areas where one sealing construction changes into another, for example on either side of the hinge joint where small adjoining square rubber gaskets guarrantee for uninterrupted sealing, keeping dash water, spattering and rain away from that wet penetration sensitive area.
Although the gaskets in the circumference of the partited hemisphericals of the two case parts are accordingly the male and female type, the rubber sealing opposite the hinge does have its base molded to recessed edges, necessarily due to the click fastening system which is situated in the same plane.
Self-evidently the sealing along those edges is going to be male and female like also while securing the clasp and finaly the case becomes closed, resulting in an uninterrupted sealing, jointing with those of the end closures.
Resumptionive it may be ascertained that along the edges of both case halfs a sound sealing condition is realized.
Sealing of the cable inside the nozzle is attained by means of a internal rubber labyrinth arranged in such a way as to allow diffenent cable thicknesses, leaving the sealing behaviour unimpeded in consequence of a converging bore.
For each cable thickness there will be at least two active pairs of semi-circular bored rubber partition skirts available.
It has to be mentioned that the material flexibility of these skirts is also defining for optimal cable sealing results.
This sealing nozzles contributes essentially to the overall sealing behaviour of the case according to this invention.
Safe plug connection in circumstances where electricity and water are used simultaneously can be referred to as one of the most important applications for the invention, for example when somebody is handling the garden-hose outside while another one is at work on vacuum cleaning the inside of a car at the same time.
Other applications worthy of being recorded are Christmas tree lightin
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Bato Trading BV
Kincaid Kristine L.
Waks Joseph
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