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:
Jun. 05, 2018
Filed:
May. 31, 2017
Johnson Electric S.a., Murten, CH;
James Irwin, Beavercreek, OH (US);
JOHNSON ELECTRIC S.A., Murten, CH;
Abstract
A linear actuator () comprises a plunger receptacle (); a coil (); a magnetic plunger (); a magnetic base (); a return spring (); and a lock spring ('). The coil () is wound about at least a portion of an exterior surface of the plunger receptacle (). The magnetic plunger () is at least partially disposed within a cavity at least partially formed by an interior surface of the plunger receptacle () for linear motion along a plunger axis (). The magnetic base () is radially disposed relative to the plunger (). The return spring () is disposed to bias the plunger () to a plunger extended position. The lock spring (′) is configured and oriented to lock the plunger () in the plunger extended position when power is not applied to the coil () but to be attracted to the magnetic base () and thereby permit movement of the plunger () to a plunger retracted position when the power is applied to the coil ().