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US 4,585,014 AGranted
Fire inhibiting tubular safety shield for a cigarette type smoking device and combination thereof
OwnerArnold H. Fryinventor
Life of this patent
Estimating the term…
Abstract
A smoking device is provided having a tubular safety shield to inhibit the ability of a rod-like smoking tobacco element from igniting other articles with which the device may come into contact. The safety shield includes a multiplicity of projections that extend relatively inward to engage with a tobacco element and support it in coaxially spaced relationship to the wall of the tubular shield, thereby resulting in an annular chamber enabling essentially uninhibited and free circulation of air. Forming of the projections results in the concurrent formation of the like number of apertures in the shield wall with these apertures effectively disposed to face in a generally axial direction relative to the longitudinal axis of the shield while enabling free airflow.
Claims15
A safety shield for use in combination with a tobacco article including a tobacco element of elongated, rod-like form having tobacco encased in a thin-walled, tubular sheath fabricated from a combustible material that is substantially impervious to airflow therethrough, the safety shield comprising
- an elongated, structurally self-supporting thin-walled tubular shield adapted to receive the tobacco element interiorly therein in axially extending relationship and in spaced relationship to an interior wall surface of said shield to thereby form an annular chamber therebetween extending substantially the coextensive length of the tobacco element and said shield, said chamber being closed at an end thereof adjacent the end of the tobacco element from which smoke is to be inhaled, said shield being formed from an essentially non-combustible material having a structural strength sufficient to remain self-supporting when subjected to heat generated by combustion of the tobacco element and including
- (a) a multiplicity of apertures formed in the wall thereof and distributed in relatively spaced relationship throughout substantially the entire shield wall that is coextensive with that portion of the tobacco element intended to be burned to enable passage of air and gaseous products of combustion therethrough relative to said annular space whereby air may freely circulate about the tobacco elements, and
- (b) a multiplicity of non-resilient projections formed as elongated portions of the wall of said tubular shield immediately adjacent said apertures, said projections having a terminal end edge extending a distance radially inward of the interior wall surface of said shield to contactingly engage with the tobacco element, said projections distributed throughout substantially the entire extent of the shield wall that is coextensive with that portion of the tobacco element intended to be burned for support of the tobacco element and ash residue formed by combustion thereof in spaced relationship to the interior wall surface of said shield and thereby forming said annular chamber, said projections being of a configuration forming a surface to guide the inflow of air for purposes of assisting combustion and the exhaust of gaseous combustion products.
A tobacco article comprising
- (A) a tobacco element of elongated, rod-like form having tobacco encased in a thin-walled, tubular sheath, said sheath fabricated from a combustible material that is substantially impervious to airflow therethrough,
- (B) an elongated, structurally self-supporting thin-walled tubular shield adapted to receive the tobacco element interiorly therein in axially extending relationship and in spaced relationship to an interior wall surface of said shield to thereby form an annular chamber therebetween extending substantially the coextensive length of the tobacco element and said shield, said chamber being closed at an end thereof adjacent the end of the tobacco element from which smoke is to be inhaled, said shield being formed from an essentially non-combustible material having a structural strength sufficient to remain self-supporting when subjected to heat generated by combustion of the tobacco element and including
- (1) a multiplicity of apertures formed in the wall thereof and distributed in relatively spaced relationship throughout substantially the entire shield wall that is coextensive with that portion of the tobacco element intended to be burned to enable passage of air and gaseous products of combustion therethrough relative to said annular space whereby air may freely circulate about the tobacco element, and
- (2) a multiplicity of non-resilient projections formed as elongated portions of the wall of said tubular shield immediately adjacent said apertures, said projections having a terminal end edge extending a distance radially inward of the interior wall surface of said shield to contactingly engage with the tobacco element, said projections distributed throughout substantially the entire extent of the shield wall that is coextensive with that portion of the tobacco element intended to be burned for support of the tobacco element and ash residue formed by combustion thereof in spaced relationship to the interior wall surface of said shield and thereby forming said annular chamber, said projections being of a configuration forming a surface to guide the inflow of air for purposes of assisting combustion and the exhaust of gaseous combustion products, and
- (C) means for securing said tobacco element and said tubular shield in assembled relationship.
2 more elements
A safety shield for use in combination with a tobacco article including a tobacco element of elongated, rod-like form having tobacco encased in a thin-walled, tubular sheath fabricated from a combustible material that is substantially impervious to airflow therethrough, the safety shield comprising
- an elongated, structurally self-supporting thin-walled tubular shield adapted to receive the tobacco element interiorly therein in axially extending relationship and in spaced relationship to an interior wall surface of said shield to thereby form an annular chamber therebetween extending substantially the coextensive length of the tobacco element and said shield, said chamber being closed at an end thereof adjacent the end of the tobacco element from which smoke is to be inhaled, said shield being formed from an essentially non-combustible material having a structural strength sufficient to remain self-supporting when subjected to heat generated by combustion of the tobacco element and including
- (a) a multiplicity of apertures formed in the wall thereof to lie substantially in a plane oriented transversely to a longitudinal axis of said tubular shield, and distributed in relatively spaced relationship throughout substantially the entire shield wall that is coextensive with that portion of the tobacco element intended to be burned to enable passage of air and gaseous products of combustion therethrough relative to said annular space whereby air may freely circulate about the tobacco elements, and
- (b) a multiplicity of projections formed on said shield to extend a distance radially inward of the interior wall surface of said shield to contactingly engage with the tobacco element, said projections distributed throughout substantially the entire extent of the shield wall that is coextensive with that portion of the tobacco element intended to be burned for support of the tobacco element and ash residue formed by combustion thereof in spaced relationship to the interior wall surface of said shield and thereby forming said annular chamber.
A safety shield for use in combination with a tobacco article including a tobacco element of elongated, rod-like form having tobacco encased in a thin-walled, tubular sheath fabricated from a combustible material that is substantially impervious to airflow therethrough, the safety shield comprising
- an elongated, structurally self-supporting thin-walled tubular shield adapted to receive the tobacco element interiorly therein in axially extending relationship and in spaced relationship to an interior wall surface of said shield to thereby form an annular chamber therebetween extending substantially the coextensive length of the tobacco element and said shield, said chamber being closed at an end thereof adjacent the end of the tobacco element from which smoke is to be inhaled, said shield being formed from an essentially non-combustible material having a structural strength sufficient to remain self-supporting when subjected to heat generated by combustion of the tobacco element and including
- (a) a multiplicity of aperture formed in the wall thereof and distributed in relatively spaced relationship throughout substantially the entire shield wall that is coextensive with that portion of the tobacco element intended to be burned to enable passage of air and gaseous products of combustion therethrough relative to said annular space whereby air may freely circulate about the tobacco elements, and
- (b) a multiplicity of projections formed as elongated portions of the wall of said tubular shield and are of channel-shaped cross-section having a terminal end edge extending a distance radially inward of the interior wall surface of said shield to contactingly engage with the tobacco element, said projections distributed throughout substantially the entire extent of the shield wall that is coextensive with that portion of the tobacco element intended to be burned for support of the tobacco element and ash residue formed by combustion thereof in spaced relationship to the interior wall surface of said shield and thereby forming said annular chamber.
Dependencies are inferred from the claim text.