Tobacco – Tobacco users' appliance – Device used for smoking
Patent
1977-08-26
1980-05-20
Pellegrino, Stephen C.
Tobacco
Tobacco users' appliance
Device used for smoking
106 97, A24F 132
Patent
active
042034566
ABSTRACT:
A smoking pipe which is porous, lightweight, chemically neutral so as not to adversely affect taste, thermally insulating, easy to make by reasonably cheap manufacturing methods, and inexpensive. The pipe is characterized by a tobacco-holding bowl which is comprised of a lightweight, porous concrete comprised of Portland cement and the following materials which may be individually present or in any combination with one another: perlite, pumice, vermiculite, molecular sieve materials, and other mixed oxides of calcium, silicon and aluminum, or mixtures of these having the desired properties of porosity, weight and stability at high temperatures. The porosity of the hardened Portland cement paste, purposely mixed with an excess of water to produce high porosity, is matched to that of the aggregate material (perlite, pumice, vermiculite, etc.). A surrounding jacket of a plastic material, such as high density polyethylene or polyvinyl chloride, can be used to strengthen the pipe bowl against fracturing, and for decorative purposes.
REFERENCES:
patent: 191385 (1977-05-01), Thurston
patent: 974051 (1910-10-01), Genthner
patent: 1368371 (1921-02-01), Taylor
patent: 2352201 (1944-06-01), Jacob
patent: 3091246 (1963-05-01), Mahieux
patent: 4042406 (1977-08-01), Gray
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