Patent US4018209A successfully refreshed from Google Patents.
US4018209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air heater
Assignee: Individual
•
Filing: 1975-11-12
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Granted: 1977-04-19
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Expires: 1995-11-12
Abstract
Abstract An air heater comprising a pipe assembly having an intake opening and an outlet opening which is horizontally supported by a stand and protected by a removable, open-topped sleeving. The pipe assembly is a series of internally interconnected pipes which provides a continuous air flow passageway from the intake opening to the outlet opening. The pipe assembly is heated by a small fire inside the sleeving while a pump forces cold air into the intake opening. As the pumped, cold air circulates through the heated pipe assembly, the air becomes heated, and hot air is expelled at the outlet opening.
Inventors
- 👤 Gene Ferruccio Bonvicini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
F; F24; F24B; F24B7/00; F24B7/002; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/08; F24H3/088
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
193 words
An air heater comprising a pipe assembly, said pipe assembly having an intake pipe defining an intake opening at one end, and an outlet pipe defining an outlet opening at one end, said pipe assembly providing a continuous air passageway between said intake opening and said outlet opening, means for horizontally supporting said pipe assembly, a protective sleeving removably attached to said pipe assembly, said sleeving having an open top and bottom and at least partially, vertically surrounding said pipe assembly when in place, said sleeving having a front plate, a rear plate and a pair of side panels, the upper portion of said front plate defining an intake pipe hole and an outlet pipe hole through which the front portion of said intake pipe and said outlet pipe outwardly protrude when said heater is assembled, said front plate having a plurality of vent holes and a centrally disposed door in its lower portion, said sleeving also having an outwardly projecting lip extending around a portion of its top edge, a means for heating said pipe assembly and a means for continuously forcing air into said intake opening and through said pipe assembly.
Claim 2
Dependent Claim
193 words
An air heater comprising a pipe assembly, said pipe assembly having an intake pipe defining an intake opening at one end, and an outlet pipe defining an outlet opening at one end, said pipe assembly providing a continuous air passageway between said intake opening and said outlet opening, means for horizontally supporting said pipe assembly, a protective sleeving removably attached to said pipe assembly, said sleeving having an open top and bottom and at least partially, vertically surrounding said pipe assembly when in place, said sleeving having a front plate, a rear plate and a pair of side panels, the upper portion of said front plate defining an intake pipe hole and an outlet pipe hole through which the front portion of said intake pipe and said outlet pipe outwardly protrude when said heater is assembled, said front plate having a plurality of vent holes and a centrally disposed door in its lower portion, said sleeving also having an outwardly projecting lip extending around a portion of its top edge, a means for heating said pipe assembly and a means for continuously forcing air into said intake opening and through said pipe assembly.
Claim 3
Dependent Claim
28 words
An air heater as defined in claim 1 wherein said sleeving extends from above said pipe assembly to the bottom of said stand when said heater is assembled.
Claim 4
Dependent Claim
40 words
An air heater as defined in claim 2 wherein said means for continuously forcing air into said intake opening is comprised of an electric air pump removably attached to said intake opening of said pipe assembly by a flexible hose.
Claim 5
Dependent Claim
28 words
An air heater as defined in claim 3 wherein said means for heating said pipe assembly comprises a fire built directly under said pipe assembly inside said sleeving.
Claim 6
Dependent Claim
118 words
An air heater as defined in claim 4 wherein an outlet hose is connected to said outlet opening, the end of said outlet hose opposite said outlet opening being connected to a hot air oven, said oven having an insulated outer wall spaced apart from an inner wall having a plurality of oven air flow baffles disposed thereon, said outlet hose being connected to said oven in such a manner as to direct the hot air flow between said inner wall and said outer wall of said oven, said oven having an exhaust vent to allow the hot air to escape from said oven after the hot air has circulated between said inner wall and said outer wall.
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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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |