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:
May. 18, 2021
Filed:
Jul. 24, 2015
Applicant:
Lontra Limited, Southam, GB;
Inventor:
Stephen Francis Lindsey, Southam, GB;
Assignee:
LONTRA LIMITED, Southam, GB;
Primary Examiner:
Int. Cl.
CPC ...
F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 18/00 (2006.01); F01C 3/02 (2006.01); F04C 3/04 (2006.01);
U.S. Cl.
CPC ...
F01C 3/025 (2013.01); F01C 3/02 (2013.01); F04C 3/04 (2013.01); F04C 2250/201 (2013.01);
Abstract
In a rotary piston and cylinder device () having a stator and a rotor, in which the stator at least partially defines an annular cylinder space and the rotor includes at least one piston that extends from the rotor into the cylinder space, and in which, during use, the piston moves through the annular cylinder space on rotation of the rotor relative to the stator, wherein at least part of an outer surface () of the rotor () is a substantially frusto-conical shaped surface.