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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.:

US 12742390 B1

PDFFull Text
Date of Patent:
Sep. 22, 2026

Filed:

Sep. 06, 2023

Two-stroke rotary engine with improved inlet and outlet ports

Applicant:

Liquidpiston, Inc., Bloomfield, CT (US);

Inventors:

Alexander Kopache, Simsbury, CT (US);

Rodrigo Eguiluz Carretero, Manchester, CT (US);

Tiago Costa, Vila Nova de Famalicao, PT;

Mark Nickerson, Falmouth, ME (US);

Saad Ahmed, West Hartford, CT (US);

Bryant Rosato, Valencia, CA (US);

Adam Spitulnik, Hartford, CT (US);

Alexander Shkolnik, Wilmington, MA (US);

Nikolay Shkolnik, West Hartford, CT (US);

Assignee:

LiquidPiston, Inc., Bloomfield, CT (US);

Attorney:

Merchant & Gould P.C.

Primary Examiner:

Ngoc T Nguyen

Int. Cl.
CPC ...
F01C 21/18 (2006.01);
U.S. Cl.
CPC ...
F01C 21/18 (2013.01);
Abstract

Rotary engine including a cycloidal rotor having N identical lobes, each lobe having a contour defined by a silhouette of the lobe, and a housing having a corresponding set of N+1 lobe-receiving regions, wherein N>2, the housing having a pair of side plates axially disposed on first and second sides of the rotor, at least one working chamber being formed in a space between the rotor and the housing and having an exhaust port and an intake port each having a top edge, the intake and exhaust ports being configured so that: (a) a leading portion of the top edge of the exhaust port has a contour that matches a first corresponding portion of the contour of the given lobe when the rotor is in an angular orientation just before any opening by the given lobe of the exhaust port, and (b) a trailing portion of the top edge of the exhaust port has a contour that matches a second corresponding portion of the contour of the given lobe when the rotor is in an angular orientation when the exhaust port is first fully closed.

Find Patent Forward Citations

Kopache, Alexander. (2026). Two-stroke rotary engine with improved inlet and outlet ports (U.S. Patent No. 12742390). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12742390

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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