US3584194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid heating techniques
Assignee: Aro Corp
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Filing: 1969-05-23
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Granted: 1971-06-08
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Expires: 1989-05-23
Abstract
Abstract Apparatus and method for heating fluid under pressure. The apparatus aspect of the disclosure includes a member that defines a chamber in which a source of heat and a radiator are located. The outer surface of the radiator defines pathways through which the fluid flows in the apparatus in order to be heated. A gap is provided between the radiator and the member so that fluid disposed in the gap partially insulates the fluid flowing in the pathways. Insulation is provided around the member and a thermostat is mounted in a cavity defined by a housing attached to the radiator so that the fluid is uniformly heated to a constant, predetermined temperature. A filter is held in an outlet assembly that automatically retains fluid in the chamber when the filter is removed for cleaning.
Inventors
- 👤 Wilbert G Kautz
- 👤 Jens D Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:44
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/002
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
200 words
In a system designed to heat fluid under pressure, apparatus comprising: a member that defines a chamber having a first end portion and a second end portion; a source of heat; radiator means coupled to said source of heat and located in the chamber for defining a first spiral pathway by which fluid flows along the exterior of the radiator means from the first end portion toward the second end portion of the chamber, said radiator means being displaced from said member by a predetermined gap that forms a second cylindrical pathway in which fluid flows, whereby the fluid flowing in the first spiral pathway is partially insulated; inlet means for receiving fluid under pressure and for conducting said fluid to said first and second pathways; outlet means for expelling heated fluid from said chamber; a housing connected to the radiator means, said housing defining a cavity; a temperature-sensitive control means mounted in said cavIty for controlling the energization of the source of heat; and insulating means for insulating the member so that the temperature gradient across the first pathway is minimized and so that the temperature to which the fluid in the first pathway is heated remains substantially constant.
Claim 2
Dependent Claim
200 words
In a system designed to heat fluid under pressure, apparatus comprising: a member that defines a chamber having a first end portion and a second end portion; a source of heat; radiator means coupled to said source of heat and located in the chamber for defining a first spiral pathway by which fluid flows along the exterior of the radiator means from the first end portion toward the second end portion of the chamber, said radiator means being displaced from said member by a predetermined gap that forms a second cylindrical pathway in which fluid flows, whereby the fluid flowing in the first spiral pathway is partially insulated; inlet means for receiving fluid under pressure and for conducting said fluid to said first and second pathways; outlet means for expelling heated fluid from said chamber; a housing connected to the radiator means, said housing defining a cavity; a temperature-sensitive control means mounted in said cavIty for controlling the energization of the source of heat; and insulating means for insulating the member so that the temperature gradient across the first pathway is minimized and so that the temperature to which the fluid in the first pathway is heated remains substantially constant.
Claim 3
Dependent Claim
51 words
Apparatus, as claimed in claim 1, wherein the insulating means comprises: a fibrous layer of material that substantially surrounds the member; a metal member that substantially surrounds the fibrous layer; and a jacket that substantially surrounds the metal member for creating closed air spaces between the metal member and the jacket.
Claim 4
Dependent Claim
15 words
Apparatus, as claimed in claim 1, wherein the gap is at least 0.010 inches wide.
Claim 5
Dependent Claim
14 words
Apparatus, as claimed in claim 1, wherein the gap is about 0.014 inches wide.
Claim 6
Dependent Claim
160 words
Apparatus, as claimed in claim 1, wherein said outlet means comprises: a body underlying the chamber that defines a cavity; a first passageway for connecting the cavity with the chamber; a second passageway for connecting the cavity with the exterior of the outlet means; a filter adapted to be inserted in the cavity; a vertical stem mounted in said first passageway; closure means attached to the top end of the vertical stem, said closure means having a first position in which the first passageway is closed and a second position in which the first passageway is open; bias means for normally biasing the closure means in its first position so that fluid is held in the chamber if the filter is removed; and operating means for moving the closure means to its second position if the filter is inserted in the cavity so that heated fluid flows from the chamber to the exterior of the outlet means through the filter.
Claim 7
Dependent Claim
34 words
Apparatus, as claimed in claim 5, wherein the operating means comprises a spring and a gasket that hold the closure means in its second position and that simultaneously hold the filter in the cavity.
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |