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Publication numberUS20040025890 A1
Publication typeApplication
Application numberUS 10/216,039
Publication dateFeb 12, 2004
Filing dateAug 8, 2002
Priority dateAug 8, 2002
Publication number10216039, 216039, US 2004/0025890 A1, US 2004/025890 A1, US 20040025890 A1, US 20040025890A1, US 2004025890 A1, US 2004025890A1, US-A1-20040025890, US-A1-2004025890, US2004/0025890A1, US2004/025890A1, US20040025890 A1, US20040025890A1, US2004025890 A1, US2004025890A1
InventorsPing-Hung Yen
Original AssigneePing-Hung Yen
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cigarette filter
US 20040025890 A1
Abstract
A cigarette filter for removing nicotine and tar from cigarette smoke is composed a filtering core (20) enclosed between the tube (10) and a mouth piece (30). Multiple gaps and passages and a residue chamber (15) are individually formed between the filtering core (20) and the tube (10). Multiple inlets (24) are defined in the filtering core (20) to communicate with the tube (10), and multiple outlets (26) are defined in the filtering core (20) to communicate between the inlets (24) and the residue chamber (15). When cigarette smoke passes through the filter core (20), nicotine and tar are deposited inside the inlets (24), outlets (26) and the residue chamber (15) because they have a larger specific gravity than the other gas in the cigarette smoke.
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Claims(8)
What is claimed is:
1. A cigarette filter adapted to hold a cigarette comprising:
a tube (10) with two ends having an inner through hole and adapted to receive a cigarette inside the inner through hole at one end;
a filtering core (20) received inside the inner through hole at the other end of the tube (10) and having an outer diameter smaller than an inner diameter of the inner through hole so that a narrow gap is formed between the tube (10) and the filtering core (20), the filtering core (20) having an inlet end, an outlet end, multiple inlets (24) defined in the inlet end, multiple outlets (26) defined near the outlet end and a channel (25) axially defined in the filtering core (20) from the inlets (24) through the outlets (26) to the outlet end; and
a mouth piece (30) attached to the tube (10) to enclose the filtering core (20) inside the inner through hole;
whereby when cigarette smoke flows through the tube (10) and into the filtering core (20), nicotine and tar are deposited inside the inlets (24), the channel (25) and the outlets (26) because the specific gravity of the nicotine and tar is larger than that of the other gases in the smoke.
2. The cigarette filter as claimed in claim 1, wherein the tube (10) has an inner surface, and an annular lip (11) is formed on the inner surface to divide the inner through hole of the tube (10) into a cigarette recess (13) and a core recess (14);
a hole (12) defined by the annular lip (11) so that the cigarette recess (13) communicates with the core recess (14);
the filtering core (20) further has a first annular seat (21) defined near the inlet end close to the annular lip (11) and a second annular seat (22) defined near the outlet end to divide the narrow gap into a middle segment (B) and two end sections (A, C);
an O-ring (210, 220) is mounted in each annular seat (21, 22) to seal the middle segment (B) from the two end sections (A, C); and
a neck (23) is defined between the first and second annular seats (21, 22) to form a residue chamber (15) to collect nicotine and tar.
3. The cigarette filter as claimed in claim 1, wherein the filtering core (20) further has a threaded nipple (27) formed on the outlet end and extending toward the mouth piece (30); and
the mouth piece (30) has a cylindrical protrusion (33) and a hollow bite (34), wherein the cylindrical protrusion (33) is tightly engaged inside the tube (10); and a threaded hole (31) is defined in the cylindrical protrusion (33) to communicate with the channel (25) to engage with the threaded nipple (27) of the filtering core (20).
4. The cigarette filter as claimed in claim 2, wherein the filtering core (20) further has a threaded nipple (27) formed on the outlet end and extending toward the mouth piece (30); and
the mouth piece (30) has a cylindrical protrusion (33) and a hollow bite (34), wherein the cylindrical protrusion (33) is tightly engaged inside the tube (10) inside the core recess (14); and a threaded hole (31) is defined in the cylindrical protrusion (33) to communicate with the channel (25) to engage with the threaded nipple (27) of the filtering core (20).
5. The cigarette filter as claimed in claim 1, wherein the filtering core (20) has six inlets (24) radially defined in the inlet end of the filtering core (20).
6. The cigarette filter as claimed in claim 4, wherein the filtering core (20) has six inlets (24) radially defined in the inlet end of the filtering core (20).
7. The cigarette filter as claimed in claim 1, wherein the filtering core (20) has eighteen outlets (26) radially defined near the outlet end of the filtering core (20) to communicate with the residue chamber (15).
8. The cigarette filter as claimed in claim 4, wherein the filtering core (20) has eighteen outlets (26) radially defined near the outlet end of the filtering core (20) to communicate with the residue chamber (15).
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    1. Field of the Invention
  • [0002]
    The present invention relates to a cigarette filter, and more particularly to a cigarette filter used to efficiently remove nicotine and tar from tobacco smoke.
  • [0003]
    2. Description of Related Art
  • [0004]
    According to many medical reports, tobacco produces pernicious gases such as nicotine, tar and carbon monoxide when burned. Among these pernicious gases, nicotine increases the heart rate of a smoker and induces vascular problems after smoking for a long term. Tar induces chronic oppilate lung diseases such as chronic bronchitis and pulmonary emphysema. Additionally, both nicotine and tar also induce carcinogenic substances to cause great damage to a smoker's health.
  • [0005]
    Therefore, the present invention has arisen to mitigate and/or obviate the problems caused from smoking.
  • SUMMARY OF THE INVENTION
  • [0006]
    The main objective of the invention is to provide a cigarette filter that efficiently removes nicotine and tar from cigarette smoke.
  • [0007]
    Other advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0008]
    [0008]FIG. 1 is a perspective view of a cigarette filter in accordance with the present invention;
  • [0009]
    [0009]FIG. 2 is an exploded perspective view of the cigarette filter in FIG. 1;
  • [0010]
    [0010]FIG. 3 is a cross-sectional side plan view of the cigarette filter along line 3-3 in FIG. 1; and
  • [0011]
    [0011]FIG. 4 is an operational cross-sectional side plan view of the cigarette filter in FIG. 1 showing the path of cigarette smoke.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0012]
    With reference to FIGS. 1 to 3, a cigarette filter is adapted to receive a cigarette and is substantially composed of a tube (10), a filtering core (20) and a mouth piece (30).
  • [0013]
    The tube (10) is hollow, is made of cellulose acetate and has an inner through hole with an inner surface and an inside diameter. An annular lip (11) is formed radially inward on the inner surface of the tube (10) to divide the inner through hole into a cigarette recess (13) and a core recess (14). The annular lip (11) forms a hole (12) through which the cigarette recess (13) communicates with the core recess (14).
  • [0014]
    The filtering core (20) is mounted inside the core recess (14) in the tube (10) and is also made of cellulose acetate. The filtering core (20) is a cylinder with an outside diameter slightly smaller than the inside diameter of the core recess (14) so that a narrow gap is formed between the inside surface of the tube (10) and the filtering core (20) in the core recess (14). The filtering core (20) has an inlet end and an outlet end. A first annular seat (21) is defined near the inlet end of the filtering core (20) and a second annular seat (22) is defied near the outlet end to divide the narrow gap into a middle section (B) and two end sections (A, C). An O-ring (210, 220) is mounted in each annular seat (21, 22) to seal the middle section (B) from the two end sections (A, C). A neck (23) is defined in the filtering core (20) between the first and second annular seats (21, 22) to form a residue chamber (15) to collect nicotine and tar from cigarette smoke. Multiple inlets (24) are radially defined near the inlet end of the filtering core (20) in front of the first annular seat (21). This embodiment of the cigarette filter has six inlets (24). Multiple outlets (26) are radially defined in the filtering core (20) between the first and second annular seats (21, 22). This embodiment of the cigarette filter has eighteen outlets (26). A threaded nipple (27) is axially formed on the outlet end of the filtering core (20) and extends toward and attaches to the mouth piece (30). A channel (25) is axially defined in the filtering core (20) from the inlets (24) to the outlets (26) and through the threaded nipple (27) but does not communicate with the hole (12) in the tube (10).
  • [0015]
    The mouth piece (30) has two ends, a cylindrical protrusion (33) extending from one end and a hollow bite (34) formed on the other end. The cylindrical protrusion (33) has an outer diameter the same as the inner diameter of the core recess (14) so the cylindrical protrusion (33) will tightly engage the tube (10) inside the core recess (14). A threaded hole (31) with two ends is defined in the cylindrical protrusion (33) to communicate with the channel (25) at one end and the hollow bite (34) at the other end. The threaded nipple (27) of the filtering core (20) is screwed into the threaded hole (31) in the mouth piece (30). The filtering core (20) attached to the mouth piece (30) is pressed onto the core recess (14) in the tube (10). The hollow bite (34) is adapted for a smoker to hold in the mouth.
  • [0016]
    With reference to FIGS. 3 and 4, when the smoker smokes a cigarette, cigarette smoke flows into the end section (A) of the narrow gap via the hole (12) in the tube (10) from the cigarette recess (13) and then into the channel (25) via the inlets (24) near the inlet end. When the cigarette smoke flows through the channel (25), nicotine and tar are deposited inside the channel (25) and especially inside the residue chamber (15) via the outlets (26). Because the nicotine and tar have a larger specific gravity than air (specific gravity of nicotine ortar=0.8; specific gravity of air=0.0012) and the residue chamber (15) is at a lower atmosphere then the channel (25), the residue chamber (15) efficiently attracts the deposited nicotine and tar. Therefore, about 15% of the nicotine and 85% of the tar are removed from the cigarette smoke when the smoke passing through the filtering core (20), thereby reducing the pernicious gases for the smoker.
  • [0017]
    It should be clear to those skilled in the art that further embodiments can be made without departing from the scope and spirit of the present invention. Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes can be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3926199 *Feb 12, 1975Dec 16, 1975Thomas Leonard LTobacco smoke filter
US4227540 *Jun 23, 1978Oct 14, 1980Edison Robert GMenthol filter for cigarettes
US4292983 *Apr 4, 1980Oct 6, 1981Mensik John AFilter cartridge assembly
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7237558Sep 30, 2003Jul 3, 2007R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
US7240678Sep 30, 2003Jul 10, 2007R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
US7669604Sep 30, 2003Mar 2, 2010R.J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
US7827997Jun 5, 2007Nov 9, 2010R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
US7856990Sep 30, 2003Dec 28, 2010R. J. Reynolds Tobacco CompanyFiltered cigarette incorporating an adsorbent material
US7878963Mar 28, 2007Feb 1, 2011Philip Morris Usa Inc.Smoking article with a restrictor
US7987856Dec 22, 2006Aug 2, 2011Philip Morris Usa Inc.Smoking article with bypass channel
US8109277Mar 6, 2008Feb 7, 2012Philip Morris USA Inc,Smoking article filter with annular restrictor and downstream ventilation
US8235056Dec 18, 2007Aug 7, 2012Philip Morris Usa Inc.Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US8235057Mar 7, 2008Aug 7, 2012Philip Morris Usa Inc.Smoking article with open ended filter and restrictor
US8240315Dec 20, 2006Aug 14, 2012Philip Morris Usa Inc.Smoking article with improved delivery profile
US8353298Jul 11, 2007Jan 15, 2013Philip Morris Usa Inc.Smoking article with impaction filter segment
US8353302Mar 7, 2008Jan 15, 2013Philip Morris Usa Inc.Smoking articles with restrictor and aerosol former
US8424539Aug 7, 2007Apr 23, 2013Philip Morris Usa Inc.Smoking article with single piece restrictor and chamber
US8424540Oct 9, 2009Apr 23, 2013Philip Morris Usa Inc.Smoking article with valved restrictor
US8434499Jan 18, 2011May 7, 2013Philip Morris Usa Inc.Filter design for improving sensory profile of carbon filter-tipped smoking articles
US8905037Oct 15, 2009Dec 9, 2014Philip Morris Inc.Enhanced subjective activated carbon cigarette
US9060546Jan 10, 2011Jun 23, 2015Philip Morris Usa Inc.Smoking article with a restrictor
US9138016Mar 25, 2011Sep 22, 2015Philip Morris Usa Inc.Smoking articles with significantly reduced gas vapor phase smoking constituents
US20050066980 *Sep 30, 2003Mar 31, 2005Crooks Evon LlewellynFiltered cigarette incorporating an adsorbent material
US20050066981 *Sep 30, 2003Mar 31, 2005Crooks Evon LlewellynFiltered cigarette incorporating an adsorbent material
US20050066983 *Sep 30, 2003Mar 31, 2005Clark Melissa AnnFiltered cigarette incorporating an adsorbent material
US20050066984 *Sep 30, 2003Mar 31, 2005Crooks Evon LlewellynFiltered cigarette incorporating an adsorbent material
US20070056600 *Sep 14, 2005Mar 15, 2007R. J. Reynolds Tobacco CompanyFiltered smoking article
US20070169785 *Dec 22, 2006Jul 26, 2007Philip Morris Usa Inc.Smoking article with bypass channel
US20070186945 *Dec 20, 2006Aug 16, 2007Philip Morris Usa Inc.Smoking article with improved delivery profile
US20080017204 *Jul 11, 2007Jan 24, 2008Philip Morris Usa Inc.Smoking article with impaction filter segment
US20080035162 *Aug 7, 2007Feb 14, 2008Philip Morris Usa Inc.Smoking article with single piece restrictor and chamber
US20080163877 *Dec 18, 2007Jul 10, 2008Philip Morris Usa Inc.Smoking article with concentric hollow core in tobacco rod and capsule containing flavorant and aerosol forming agents in the filter system
US20080216848 *Mar 6, 2008Sep 11, 2008Philip Morris Usa Inc.Smoking article filter with annular restrictor and downstream ventilation
US20080216850 *Mar 5, 2008Sep 11, 2008Philip Morris Usa Inc.Restrictor attachment for unfiltered smoking article
US20080216851 *Mar 7, 2008Sep 11, 2008Philip Morris Usa Inc.Smoking articles with restrictor and aerosol former
US20080216853 *Mar 7, 2008Sep 11, 2008Philip Morris Usa Inc.Smoking article with open ended filter and restrictor
US20110083675 *Apr 14, 2011Philip Morris Usa Inc.Smoking article with valved restrictor
US20110083687 *Oct 9, 2009Apr 14, 2011Philip Morris Usa Inc.Cigarette filter to reduce smoke deliveries in later puffs
US20110088704 *Oct 15, 2009Apr 21, 2011Philip Morris Usa Inc.Enhanced subjective activated carbon cigarette
US20110247639 *Nov 24, 2009Oct 13, 2011Smokequit ApsCigarette holder for smoke dilution
Classifications
U.S. Classification131/187, 131/202
International ClassificationA24F7/04
Cooperative ClassificationA24F7/04
European ClassificationA24F7/04