Abstract: A tube filter for smoking a smokable substance that includes a receiving section having a receiving chamber dimensioned to receive the substance, a smoke section having a smoke chamber to output smoke produced while the substance is ignited, wherein the smoke section has a first open end into the smoke chamber and the receiving section has a second open end into the receiving chamber that is opposite to the first end, and first, second, and third indentations that are disposed between the two chambers, wherein a portion of the first indentation and a first portion of the second indentation are disposed within a first cross-section of the filter and a portion of the third indentation and a second portion of the second indentation are disposed within a second cross-section of the filter, and the third indentation is entirely disposed above the first indentation along the center longitudinal axis.

Abstract: This apparatus for the smoking of tobacco and other bulk dried material enables those persons who enjoy smoking to do so in a healthier manner. In the described appliance a water bath cools and filters the smoke before it reaches the mouth and lungs of the smoker. An array of, preferably conical, diffusion screens (210) restricts the size of particulate matter passing through the device from the combustion bowl (180) to the user. By controlling air pressures, valves (240) in series with the diffuser (210) prevent water from flowing into it thereby minimizing the pressure a user must apply to draw smoke through the appliance. This keeps solids from accumulating on or in the diffuser which facilitates cleaning. A static turbine (300) in the throat (110) of the appliance aids additional cooling while reducing the amount of suction that must be applied by a user to clear the main chamber.

Abstract: Fibrous material suitable for incorporation into filter elements of smoking articles such as cigarettes are impregnated with additives and agents such as flavorants, flavorant-enhancers and/or free radical scavengers. The fibrous material is contacted with the additive dispersed in a high pressure gas or supercritical fluid (SCF) held at elevated pressures. The high pressure gas or SCF swells the fibrous matrix and enables the additive to be incorporated within the matrix. When pressure is reduced, the gas or SCF vaporizes and leaves the additive embedded in the fiber interstices. As a result, the additive is slowly released over a finite period of time. When incorporated into a cigarette filter, the additive is released at a desired rate from the interior of the fibrous filter into the cigarette smoke.

Abstract: A tobacco smoke containment apparatus and method therefor having the characteristics of limiting the exhaust of harmful smoke particles as well as reducing the overall risk of accidental fire by containing a smoking tobacco product inside a closed receptacle.

Abstract: A pipe assembly is provided to accommodate the specific filter preferences of the pipe smoker. The pipe assembly includes a bowl, a stem and a mouthpiece. A cylindrical mounting aperture extends into the end of the stem remote from the bowl, and a connecting passage joins the mounting aperture to the tobacco receiving cavity in the bowl. The mouthpiece has a proximal end with a passage therein and a distal end that can be slidably received in the mounting aperture of the stem. The mouthpiece further includes a filter receptacle that communicates with the passage extending into the proximal end of the mouthpiece. The filter receptacle is dimensioned to accommodate wide prior art filters. The pipe assembly further includes a tubular filter adapter with an outside diameter for slidable engagement in the filter receptacle and an inside diameter dimensioned to receive narrower pipe filters.

Abstract: Secondary smoke is harmful to passive smokers. A filter sleeve (1) comprises a sleeve (10) with a downstream portion (11) adapted for receiving inhale smoke into an inhalation flow path (13), an upstream portion (12) adapted for inhalation of said inhale smoke and for receiving exhale smoke into an exhalation flow path (14), filter means (15) provided along said exhalation flow path (14), and means (16) for checking reverse flow of ambient air through said exhalation flow path (14). A filter sheath (3) is adapted for overlaying a significant expanse of the sidestream smoke emission areas of a rod of smokable material (7), said filter sheath (3) is sufficiently porous and significantly unimpaired by combustion.

Abstract: A cigarette filter tip structure includes a cigarette holder, and a filter base mounted on the bottom of the cigarette holder. The cigarette holder includes a compartment defined therein and having a bottom formed with a shoulder, the compartment having a center defining a compression hole, four L-shaped support bases each mounted in an inner wall of the compartment, and each having a bottom formed with a transversely extending positioning portion. The filter base has a top defining a filter recess for receiving the shoulder of the cigarette holder, and a bottom defining a passage and formed with a mouth suction portion.