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:
Jul. 26, 1994
Filed:
Jul. 29, 1992
Hiroshi Komachi, Tokyo, JP;
Harada Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An actuator for a door lock mechanism, that is capable of sufficiently securing a strong driving force as well as a necessary stroke quantum, that is small in size, and that makes manual operation possible under a light load, comprising: a columnar body that is rotated by a forward-reverse motor and provided with, on its outer circumferential surface, a first spiral stage, which forms an upward gradient in a first direction when the columnar body rotates in a forward direction, a second spiral stage which forms an upper-gradient in a second direction when the columnar body rotates in a reverse direction; and a displacement component having one end driven to move in the first direction by the first spiral stage at the time of the positive rotation of the columnar body and in the second direction by the second spiral stage when the columnar body rotates in the reverse direction, thus causing another end of the displacement component to actuate a latch mechanism for locking doors.