US3823307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating vessels
Assignee: SURSEE WERKE AG
•
Filing: 1973-04-26
•
Granted: 1974-07-09
•
Expires: 1993-04-26
Abstract
Abstract A closed heating system for heating vessel comprising a water reservoir located underneath the bottom of the vessel, a narrow conduit extending upwardly along the sides of the vessel to create a capillary action on the rising steam and prevent airsteam mixing in the conduit, a steam-air separation chamber connected to the top of the conduit for trapping air in the system and condensing the steam, and a condensate return conduit for returning condensed steam to the reservoir.
Inventors
- 👤 R Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:33
CPC Classifications
A; A47; A47J; A47J27/00; A47J27/14; A47J27/16; A47J27/17
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
A heating vessel having thermally conductive inner side walls, a thermally conductive bottom wall, a thermally nonconductive outer lining extending around and lying adjacent the outer surface of the side walls closed at the top and defining a closed cavity between the bottom and side walls and the outer lining, and a closed heating system for the vessel housed within the closed cavity, said closed heating system comprising a main reservoir for holding a supply of water as the heating medium, heating means in said cavity for heating the water in the reservoir to produce steam, at least one narrow conduit connected to the reservoir and extending upwardly along the outer surface of the side walls of the vessel, the conduit passage being sufficiently narrow so as to create a capillary effect on the rising steam and prevent air-steam mixing in the conduit, an airsteam separation chamber connected to the top of the steam conduit for collecting and trapping air in the system and permitting condensation of the steam, and at least one return conduit connected between the separation chamber and the reservoir for returning the condensed steam to the main reservoir.
Claim 2
Dependent Claim
192 words
A heating vessel having thermally conductive inner side walls, a thermally conductive bottom wall, a thermally nonconductive outer lining extending around and lying adjacent the outer surface of the side walls closed at the top and defining a closed cavity between the bottom and side walls and the outer lining, and a closed heating system for the vessel housed within the closed cavity, said closed heating system comprising a main reservoir for holding a supply of water as the heating medium, heating means in said cavity for heating the water in the reservoir to produce steam, at least one narrow conduit connected to the reservoir and extending upwardly along the outer surface of the side walls of the vessel, the conduit passage being sufficiently narrow so as to create a capillary effect on the rising steam and prevent air-steam mixing in the conduit, an airsteam separation chamber connected to the top of the steam conduit for collecting and trapping air in the system and permitting condensation of the steam, and at least one return conduit connected between the separation chamber and the reservoir for returning the condensed steam to the main reservoir.
Claim 3
Dependent Claim
23 words
The heating vessel of claim 1, further including an expansion chamber in the heating system for absorbing air and water expansion during heating.
Claim 4
Dependent Claim
17 words
The heating vessel of claim 2, wherein the steam-air seParation chamber also serves as the expansion chamber.
Claim 5
Dependent Claim
17 words
The heating vessel of claim 2, wherein the expansion chamber is separate from the steam-air separation chamber.
Claim 6
Dependent Claim
21 words
The heating vessel according to claim 1, wherein the width of the steam conduit passage is less than about 3 mm.
Claim 7
Dependent Claim
33 words
The heating vessel according to claim 1, wherein the steam conduit comprises a narrow, annular conduit extending upwardly around the side walls of the vessel and forming a double lining for the vessel.
Claim 8
Dependent Claim
50 words
The heating vessel of claim 1, including a plurality of spaced baffles located within the space between the outer lining and the side walls, said baffles defining alternately steam conduits and condensate return conduits between adjacent baffles, the adjacent conduits being interconnected at their tops by the air-steam separation chamber.
Claim 9
Dependent Claim
19 words
The heating vessel of claim 1, wherein the water reservoir is located underneath the bottom wall of the vessel.
Claim 10
Dependent Claim
17 words
The heating vessel of claim 1, wherein the heating means in said cavity comprises electrical heating rods.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |