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:
Aug. 16, 2022
Filed:
Jan. 22, 2019
Linak A/s, Nordborg, DK;
Jens Lück, Sønderborg, DK;
Linak A/S, Nordborg, DK;
Abstract
Linear actuator comprising an electric motor () which through a transmission () drives a spindle unit, where the spindle unit comprises at least one spindle () with a spindle nut (), where the spindle () is equipped with a bearing (). In connection with the spindle unit there is an adjustment element (), typically tubular. In order to retain the adjustment element () in a given position when the power supply for the electric motor () is interrupted, a brake () comprising a spring () and a cylindrical element () is provided. The cylindrical element () has a threaded pin (a) on which a nut () is arranged, and where the spring () is positioned around the cylindrical element () between one side of the nut () and a stop () on the cylindrical element () such that the spring () presses the nut () with its other side against a contact surface (). The brake power is thus generated by the nut rubbing against the contact surface with its one side. It is thus an alternative brake construction having a simple construction and where the spring only exerts a compressive force. The brake power can be adjusted to the spring power, and the friction between the nut and the contact surface and finally the thread pitch on the nut.