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:
Nov. 27, 1979
Filed:
Aug. 29, 1977
Gerald T Swanson, Fort Collins, CO (US);
Teledyne Industries, Inc., Ft. Collins, CO (US);
Abstract
A cigarette filter includes a barrel, a mouthpiece at one end and a cigarette-receptive tip at the other. A restricted orifice extends through a transverse wall within the barrel. An air inlet extends through the barrel wall at a location toward the mouthpiece from the transverse wall. Received within the barrel is a stem that defines a passage for the flow of smoke, and the inlet also communicates with that passage. The stem includes a nose which is spaced from the outlet end of the orifice and defines a collection area for particulate matter included in the smoke. A system concept includes a combination of a plurality of such filters in each successive one of which the orifice is of respectively decreased diameter and the air inlet is of respectively increased diameter. The relationship of those diameters is such that different ones of the filters establish a substantially constant impedance to the drawing of smoke and air through the mouthpiece.