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:
Mar. 26, 2013
Filed:
Mar. 28, 2008
Zentaro Yamaguchi, Takasaki, JP;
Zentaro Yamaguchi, Takasaki, JP;
Mitsuba Corporation, Kiryu-shi, JP;
Abstract
A linear actuator capable of setting a bed to a flat state in emergencies is provided. A linear actuatorcontains a shaftwith a feed male screw section, a worm gear reduction device for transmitting the rotation of a motorto the shaft, a nutthat is coupled by a screw to the feed male screw sectionand advances or retreats by the forward rotation of the shaftand advances or retreats by the reverse rotation of the shaft, and a moving cylinderthat is fixed to the nutand advances and retreats relative to a housing, wherein a sub-shaftlinking to the worm gear reduction device, an inner racespline-coupled to the sub-shaft, an engaging male sectionand engaging female sectionfor free engaging, provided between a collarof the shaftand the inner race, an operating ringfitted to allow free rotation on the outer circumference of the housing, and a function ringfor converting the rotation of the operating ringto an axial movement and transmitting it to the inner raceare installed. The shaftcan be freely rotated in emergencies by releasing the engaging between the engaging male section and the engaging female section.