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. 05, 2022
Filed:
Aug. 23, 2018
Linak A/s, Nordborg, DK;
Jeppe Christian Bastholm, Sønderborg, DK;
Christian Tjønelund Ahler, Sønderborg, DK;
Linak A/S, Nordborg, DK;
Abstract
A linear actuator () comprises a spindle nut arranged to be moved between two end positions on a spindle driven by a DC motor (). An end stop switch () is arranged to be activated when the spindle nut is in an end position. In its activated state, the end stop switch disconnects the motor current and connects a first diode () across the DC motor for short circuiting the motor when the current is interrupted. A second diode () is connected over the end stop switch for enabling the DC motor to drive the spindle nut out of said end position. An additional component () in series with the first diode reduces noise problems caused by motor current circulating through this diode during pulse pauses while the spindle nut is driven out of an end position by a pulse width modulated voltage via a cable from a control box.