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. 19, 1989
Filed:
Mar. 16, 1988
Donald L Roberts, Winston-Salem, NC (US);
David W Boldridge, Winston-Salem, NC (US);
R. J. Reynolds Tobacco Company, Winston-Salem, NC (US);
Abstract
A smoking article having a valve system for closing off the flow of smoke to the user in response to an increase in temperature or humidity. The valve system includes a plastic body with a hollow valve chamber communicating with a smoke passage. A valve element is located in the chamber and is movable between a first position in which smoke from the smoking article is allowed to pass through the smoke passage and a second position in which the valve element closes the smoke passage thereby preventing smoke from passing therethrough. Expansion means are connected to the valve element and cause the valve to move between the first and second positions in response to the temperature or humidity of the smoke.