US3791390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking pipe
Assignee: Individual
•
Filing: 1972-08-14
•
Granted: 1974-02-12
•
Expires: 1992-08-14
Abstract
Abstract A smoking pipe having a foraminous bowl insert which serves as a grate for the burning tobacco, the insert coacting with the inner wall of the bowl cavity to provide a surrounding air chamber having a communication with a smoking stem passage, and an auxiliary passage between the air chamber and the bowl exterior adapted for finger control by the smoker so as to be closable during conventional smoking, and opened for short inactive smoking periods to provide combustion air to the air chamber to maintain combustion and continued burning of the tobacco.
Inventors
- 👤 V Hendricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:49
CPC Classifications
A; A24; A24F; A24F5/00; A24F5/06; A24F5/08; A24F5/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
49 words
As an article of manufacture, an insert for the bowl of a smoking pipe, comprising: a. a generally open ended tubular wall of a foraminous material; b. a peripheral upper end outwardly projecting flange on said wall; and c. a peripheral lower end bowl seating ring on said wall.
Claim 2
Dependent Claim
49 words
As an article of manufacture, an insert for the bowl of a smoking pipe, comprising: a. a generally open ended tubular wall of a foraminous material; b. a peripheral upper end outwardly projecting flange on said wall; and c. a peripheral lower end bowl seating ring on said wall.
Claim 3
Dependent Claim
17 words
An article of manufacture according to claim 1, wherein the wall is of a screen mesh material.
Claim 4
Dependent Claim
18 words
An article of manufacture according to claim 1, in which the wall is tapered towards its lower end.
Claim 5
Dependent Claim
168 words
A smoking pipe, comprising: a. a bowl having an inner wall forming a top opening cavity; b. a tobacco containing tubular sleeve insert extending through said top opening into said cavity, said insert having an upper end peripherally engaged with the bowl brim, at said top opening, a lower open end peripherally engaged with a bottom wall portion of the cavity, and a foraminous wall coacting with said cavity wall, to provide an air chamber surrounding the foraminous wall, said air chamber being closed at its top except for communication through the foraminous wall; c. a smoking stem having a passage connection with said air chamber; and d. at least one auxiliary manually controllable passage in said bowl connecting said air chamber and the outside of said bowl adapted to be closed by a finger of the smoker while applying suction to the stem, and opened when not smoking to provide a supply of combustion air to the chamber to maintain combustion and continued burning of the tobacco.
Claim 6
Dependent Claim
168 words
A smoking pipe, comprising: a. a bowl having an inner wall forming a top opening cavity; b. a tobacco containing tubular sleeve insert extending through said top opening into said cavity, said insert having an upper end peripherally engaged with the bowl brim, at said top opening, a lower open end peripherally engaged with a bottom wall portion of the cavity, and a foraminous wall coacting with said cavity wall, to provide an air chamber surrounding the foraminous wall, said air chamber being closed at its top except for communication through the foraminous wall; c. a smoking stem having a passage connection with said air chamber; and d. at least one auxiliary manually controllable passage in said bowl connecting said air chamber and the outside of said bowl adapted to be closed by a finger of the smoker while applying suction to the stem, and opened when not smoking to provide a supply of combustion air to the chamber to maintain combustion and continued burning of the tobacco.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |