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Back to the List of the Granted Patents                                      Click here to download KE000068 PDF(11) Patent Number: KE 68
(45) Date of grant: 25/10/1998
(51) Int.Cl.5: a 24f 1/02
(21) Application Number: 1997/000228
(22) Filling Date: 25/11/1997
(73) Owner: AYUB NDII of, kijabe, P.O.Box 68, Kenya
(72) Inventor: AYUB NDII
(57) Abstract:
A devise composed of three chambers that works in togetherness to achieve the removal of tar and volatile chemicals. The hot smoke from the cigarette is first cooled in the first chamber and then moves the second chamber where the separation of tar and volatile chemicals is done and also the remaining heat from the first chamber is further reduced, ready for the final stage of chamber three that purifies smoke to be inhaled.
The present invention relates to a device namely Cigarette Tar Remover hereafter, referred to as "CT.R" that significantly removes the tar and other volatile chemicals that are always present in any cigarette that is smoked through it whether with a filter or not.
                            BACKGROUND ART,
As is well known to those skilled in the art, the tar and other chemicals present in a burning cigarette are invisible, even under a microscope and normally are inhaled from each and every cigarette that is smoked whether a cigarette has a filter or not thus causing health risks to the smoker especially to his lungs and his blood circulatory system. Thus a need for Cigarette Tar Remover capable to remove and cut down these harmful substances before they reach the lungs and hence into the circulatory system of the smoker
The CTR works only on the cigarette smoke without altering the taste and flavor of any particular cigarette and only removes and reduces tar and the volatile chemicals that are contained in the normal cigarette smoke.
According to the present invention, when the cigarette is affixed to the CTR device and
20 ignited, the physical process of tar removal begins and continues until the cigarette is burned out. If a cigarette is stopped halfway, the process of tar removal stops and only restarts when the cigarette is lighted again
In order to achieve the above results, the device is made in a way that it has three chambers that comprise of three stages that the smoke must pass before the tar and 25 chemicals are removed.
These chambers are named A, B and C in figure 1. When the smoke reaches chamber A which is a high temperature compartment made of aluminum and which is designed to withstand high temperatures of the incoming gases from the fire tip, then the first action for removing tar begins.
The hot mixture of air and vaporized cigarette fumes leaves the burning tip of the cigarette at 150 degrees centigrade, and as this hot mixture of gases travel through the cigarette stick, the combination undergoes a temperature gradient drop by heating the adjacent tobacco leaves and free air inside and outside the cigarette, and by the moment when this mixture settles inside chamber A, the temperature of the mixture has fallen down to 70 degrees centigrade.
This is followed by a further and rapid boss of heat through radiation, conduction and convection which takes place in chamber A facilitated by the metallic chamber and the adjoining steel band ring on the outside of the chamber and on this, the cascade of heat gain and loss stabilizes the temperature inside chamber A at 40 degrees centigrade. Chamber A is the lower temperature gradient point away from the fire end of the burning cigarette. This chamber acts as the saturation point where the partial pressure of the cigarette smoke is highest.
From chamber A the smoke does not enter chamber B which is the second stage. Chamber B has a radiator coil designed to naturally radiate any heat still retained by the mixture of gases now trapped inside chamber A. The chamber provides the last point along the temperature gradient whereby the effluent gases lose any residual heat energy further lowering the temperature of the cigarette smoke destined to be inhaled
The radiator coil inside this chamber absorbs any residual heat stilt retained by the mixture of air and cigarette smoke and radiates it away into the surrounding space and then into the atmosphere, thus ensuring that the smoke that is inhaled is consistent with the ambient temperature.
The smoke leaves chamber A to chamber C which is the third stage. This is the final processing stage and is essentially the exhaust point, from which the cigarette smoker draws in the purified smoke to be inhaled, this being the smoke whose tar and volatile chemical components are lowest.
Chamber C always remains at the normal atmospheric pressure and temperature by virtue of the fact that it opens directly into the atmosphere.
This chamber also serving as the exhaust tube is made of magnetized steel tube. The purpose of magnetism being to hold the condenser-steel rod in place until the user ejects it for the purpose of cleansing it or replacement.
Any ferrous dust particles are also trapped inside this chamber where they are swabbed out from time to time.
At the burning/smouldering tip of the cigarette all combustible substances are burned and vaporized giving rise to the main components of the cigarette smoke namely
(i) Water vapour
(ii)  Tar
(iii) Volatile oils
(iv) Carbon dioxide/monoxide
(v) Soot
When all the vaporized compounds travel or are sucked into and through the CTR device, they are subjected to an action of concentration, saturation and finally condensation as a result of heat loss and dissipation along the temperature gradient. The condensates, primarily tar and greases are then trapped by the condenser rod, thereby getting retained on it and also inside the exhaust duct both of which are made of stainless steel.
By this process of tar removal, the gases leaving the CTR device have much less tar, soot, greases, and other volatile chemicals compared to normal cigarette smoke. It is noteworthy that only the temperature gradient condenser rod and the exhaust duct need cleaning whenever the user deems it necessary
The CTR device is designed to last for a long time when it is used as intended. Figure 2 shows relative tar and grease recovered from one to ten non-filter cigarettes respectively. Figures 3-9 show the individual components required to assemble the device in order to achieve the described results.
Single or mass production of CTR device shall be determined by the customer's specifications as pertains to specific dimensions, elemental materials and quality.
Extensive testing of a prototype device of the CTR has shown beyond any doubt that the efficiency of the device is manifested in the following ways;
(a)  It removes and reduces tar from the cigarette smoke.
(b)  It removes and reduces volatile oils, soot and grease from the cigarette smoke.
(c)  It reduces teeth staining caused by the cigarette smoke tar.
(d)  It reduces mucus expectorants (sputum) induced by the tar contained in the cigarette smoke.
 (e) It reduces irritation& coughing induced by the tar contained in the cigarette
(f) It lessens the load of cigarette smoke pollutants inside a confined environment, by trapping and retaining the pollutants inside the device.
1. A cigarette smoke tar removing device comprising of three chambers named A,B and
C, combined together and depending on each other, where each chamber acts to potentiate the sequence of tar removal as the cigarette smoke travels through the device before it is inhaled by the cigarette smoker.
(i) Chamber A is made of aluminum and acts as the first stage of the process.
(ii) Chamber B, encompasses a metal coil and forms the second stage of the process.
(iii) Chamber C comprises of a magnetized steel duct housing a stainless steel condenser rod and forms the final stage of the tar removal process.
2. Chamber A as in claim I is characterized by a compartment made of aluminum and designed to withstand high temperatures from the incoming gases originating from the burning end of the cigarette.
 3. A claim according to claim 2, where the first chamber acts as a concentration and
saturation chamber for the incoming cigarette smoke.
4. A second chamber B, as in claim 1 where the second chamber, not directly connected
to chamber A and C facilitates heat exchange through conduction, convection and radiation.
5. A claim according to claim 1,2 and 4 where the third chamber C, is interjoine.4 with
the second chamber and is characterized by a temperature gradient condenser rod which traps and retains tar and volatile oils in the cigarette smoke.
6. A claim according to claim 1 and 5 where the device is characterized by a magnetized steel duct named in chamber C which acts to hold the temperature gradient condenser rod in place.
7. A claim according to claim 1 where the device is characterized by a spring loaded
ejector - exhaust duct that facilitates the removal of the cigarette stub/filter after the cigarette has been used up.
 8. The application and use of the device as claimed in claims 1-7.
A device composed of three chambers which work in togetherness to achieve the removal of tar and volatile chemicals from the cigarette smoke. The hot smoke from the cigarette is first cooled in the first chamber, and then moves to the third chamber where the separation of tar and volatile chemicals is done.
The second chamber, acts as the main heat exchanger through radiation, convection and conduction facilitating the separation of tar and volatile chemicals from the cigarette smoke. Also, any remaining heat from the first chamber is further dissipated in chamber three, which purifies the smoke to be inhaled.

2    4

    .r■ ‘.0    METAL CASING    A    CHAMBER "A"
        METAL BAND        
        METAL COIL        
        METAL DUCT    C    CHAMBER "C"
        METAL CONDENSER ROD        
        RETURN SPRING        
c,    ILE Lw-c E    p,c-Aive,    r.tsA Gr

                FIG. 6 METAL CONDENSER RING    



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