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. 28, 2023
Filed:
Apr. 09, 2021
Mainspring Energy, Inc., Menlo Park, CA (US);
John Lawler, Portland, OR (US);
John Powers, Menlo Park, CA (US);
Scott Coakley, Belmont, CA (US);
Alan Crapo, San Jose, CA (US);
David DeGraaff, Mountain View, CA (US);
Christopher David Gadda, Palo Alto, CA (US);
Andrew Hancock, Fremont, CA (US);
Shannon Miller, Belmont, CA (US);
Samuel Sherman, San Francisco, CA (US);
Matthew Svrcek, Redwood City, CA (US);
Kevin Walters, Redwood City, CA (US);
Mainspring Energy, Inc., Menlo Park, CA (US);
Abstract
A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.