The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 18, 1994
Filed:
Aug. 24, 1993
Susumu Shibata, Chiba, JP;
Yuichi Fujita, Chiba, JP;
Kazumi Shima, Chiba, JP;
Makoto Wada, Tokyo, JP;
Toyo Engineering Corporation, Tokyo, JP;
Abstract
An automatic plug-in connecting unit having small weight, capable of automatically connecting and disconnecting an electric current supply line, and satisfying the conditions for a ventilated type pressurized type explosion-protected construction or a sealed type pressurized type explosion-protected construction includes an automatic plug-in connecting apparatus having a supply side connecting unit provided with an electrically connecting socket contact which is buried in one end portion thereof, and which serves also as an air vent, a reception side connecting unit provided with a pin contact forming a counterpart of the said socket, a means for connecting and disconnecting the socket contact and pin contact to and from each other, and an engagement guide, characterized by a clean gas supply means for turning the atmosphere around the socket contact and pin contact into a clean gas atmosphere when these contacts are connected or disconnected by combining the supply side connecting unit with the reception side connecting unit, a connection detecting means for ascertaining the connection of the supply side connecting unit to the reception side connecting unit, a supplied clean gas detecting means adapted to sense the presence or absence of a clean gas supplied to the interior of the supply side connecting unit, and a current supply control means for controlling the supplying of an electric current from a power source in accordance with the operations of the connection detecting means and supplied clean gas detecting means.