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. 16, 2001
Filed:
Apr. 21, 1998
Takayuki Ohta, Okazaki, JP;
Toshimitsu Oka, Okazaki, JP;
Yuichi Murakami, Chiryu, JP;
Rikuo Hatano, Toyota, JP;
Kiyokazu Ieda, Chiryu, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A door approach transmission apparatus comprises an outside door handle,having a conductor with a slit,disposed in the door handle surface. A slot antenna,is disposed at the slit,, and includes feeding points,installed on the conductor. The apparatus also includes a transmitter,for applying voltage for radio wave oscillation to the feeding points,. The above-described door approach transmission and reception apparatus can be used in a door lock control apparatus where a search radio wave is emitted from a vehicle, a portable wireless device,receives the search radio wave, and returns an ID signal. An electrically driven door lock apparatus,is driven to unlock the door when the returned ID signal coincides with a registered ID signal. The search radio wave is irradiated from the slot antenna. Either of a transmitter,and a receiver,is selectively connected to the feeding points,. By virtue of the above-described features, the emission and reception of radio waves is realized, and in the case of a door handle made of a metal, the number of parts for emission and reception of the radio waves are reduced.