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. 26, 2020
Filed:
Jul. 24, 2015
Lontra Limited, Southam, Warwickshire, GB;
Stephen Francis Lindsey, Southam, GB;
LONTRA LIMITED, Southam Warwickshire, GB;
Abstract
A rotary piston and cylinder device () comprising a rotor (), a stator and a shutter disc (), the rotor comprising a piston () which extends from the rotor into the cylinder space, the rotor and the stator together defining the cylinder space, the shutter disc passing through the cylinder space and forming a partition therein, and the disc comprising a slot () which allows passage of the piston therethrough, and a surface of the rotor and a surface of the stator opposing each other forming a close-running surface pair, and at least one of the surfaces comprising an abradable coating () which is provided with a plurality of recess formations, and the recess formations are discontinuous from each other.