U.S. patent application number 10/216039 was filed with the patent office on 2004-02-12 for cigarette filter.
Invention is credited to Yen, Ping-Hung.
Application Number | 20040025890 10/216039 |
Document ID | / |
Family ID | 31494995 |
Filed Date | 2004-02-12 |
United States Patent
Application |
20040025890 |
Kind Code |
A1 |
Yen, Ping-Hung |
February 12, 2004 |
Cigarette filter
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.
Inventors: |
Yen, Ping-Hung; (Changhua
City, TW) |
Correspondence
Address: |
DELLETT AND WALTERS
310 S.W. FOURTH AVENUE
SUITE 1101
PORTLAND
OR
97204
US
|
Family ID: |
31494995 |
Appl. No.: |
10/216039 |
Filed: |
August 8, 2002 |
Current U.S.
Class: |
131/187 ;
131/202 |
Current CPC
Class: |
A24F 7/04 20130101 |
Class at
Publication: |
131/187 ;
131/202 |
International
Class: |
A24F 013/06; A24F
007/04 |
Claims
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] FIG. 1 is a perspective view of a cigarette filter in
accordance with the present invention;
[0009] FIG. 2 is an exploded perspective view of the cigarette
filter in FIG. 1;
[0010] FIG. 3 is a cross-sectional side plan view of the cigarette
filter along line 3-3 in FIG. 1; and
[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.
* * * * *