Patent US3965334A successfully refreshed from Google Patents.
US3965334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating device
Assignee: Individual
•
Filing: 1973-04-25
•
Granted: 1976-06-22
•
Expires: 1993-04-25
Abstract
Abstract A heating device, comprising a tubular body whose inner wall bounds a heating chamber for objects. Between the inner wall and the outer wall of this body a plurality of ducts is provided which are situated in a ring-shape about the heating chamber and which extend parallel to the tube axis. These ducts are separated from each other by rigid partitions. Each duct contains evaporable heat transport medium.
Inventors
- 👤 George Albert Apolonia Asselman
- 👤 David Bruce Green
- 👤 Adrianus Petrus Johannes Castelijns
- 👤 Pieter Aart Naastepad
- 👤 Jacob Willem De Ruiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:44
CPC Classifications
F; F28; F28D; F28D15/00; F28D15/02; F28D15/0233; F28D15/06; F28F; F28F2200/00; F28F2200/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A heating device comprising a housing formed as a round tube made of heat insulating material, the tube having an inner peripheral surface and first and second ends, a plurality of heat pipes, each being a hermetrically sealed tube with a first evaporation end, a second condensation end, and capillary material on the inner peripheral surface, said heat pipes situated around and adjacent said housing inner peripheral surface and positioned in parallel with each other and with said housing tube axis, said heat pipes positioned with their first and second ends respectively adjacent said first and second ends of said housing, and at each end of the housing an annular end plate of heat insulating material, secured to and maintaining in relative position said heat pipes and housing tube ends, with a cylindrical heating chamber defined by the space radially inward of said heat pipes.
Claim 2
Dependent Claim
145 words
A heating device comprising a housing formed as a round tube made of heat insulating material, the tube having an inner peripheral surface and first and second ends, a plurality of heat pipes, each being a hermetrically sealed tube with a first evaporation end, a second condensation end, and capillary material on the inner peripheral surface, said heat pipes situated around and adjacent said housing inner peripheral surface and positioned in parallel with each other and with said housing tube axis, said heat pipes positioned with their first and second ends respectively adjacent said first and second ends of said housing, and at each end of the housing an annular end plate of heat insulating material, secured to and maintaining in relative position said heat pipes and housing tube ends, with a cylindrical heating chamber defined by the space radially inward of said heat pipes.
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1 wherein said heat pipes contain potassium as the heat transport medium, for operation in the temperature range of 400-800°C.
Claim 4
Dependent Claim
24 words
Apparatus according to claim 1 wherein said heat pipes contain lithium as the heat transport medium, for operation in the temperature range of 950°-1800°C.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 1 wherein said heat pipes contain sodium as the heat transport medium for operation in the temperature range of 600°-900°C.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 1 operable with a source of electric current, further comprising wire heating elements wound around the housing inner periphery and adjacent the evaporation ends of said heat pipes.
References Cited (Backward Citations)
US628052A
Cited
US1084439A
Cited
US1332216A
Cited
DE852231C
Cited
US3646320A
Cited
US3651240A
Cited
US3640517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |