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:
Sep. 28, 2021
Filed:
Sep. 01, 2017
Applicant:
Lontra Limited, Southam, GB;
Inventor:
Stephen Francis Lindsey, Southam, GB;
Assignee:
LONTRA LIMITED, Southam, GB;
Primary Examiner:
Int. Cl.
CPC ...
F01C 11/00 (2006.01); F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F01C 19/02 (2006.01); F01C 3/02 (2006.01); F01C 21/08 (2006.01);
U.S. Cl.
CPC ...
F01C 19/02 (2013.01); F01C 3/02 (2013.01); F01C 3/025 (2013.01); F01C 21/08 (2013.01);
Abstract
A rotary piston and cylinder device () comprising a rotor (), a stator () and a rotatable shutter (), a rotary piston and cylinder device comprising a rotor, a rotatable shutter, the rotor comprising a piston (), the piston comprising a first side () and a second side (), the first side () arranged to seal with a slot of the shutter, and comprises a working face, the second side being a substantially oppositely directed side to the first side, and the second side () comprising a sealing portion arranged to seal with the shutter slot and/or stator and a non-sealing portion arranged not to seal with the shutter slot.