Patent US3882894A successfully refreshed from Google Patents.
US3882894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct fired water heater
Assignee: Individual
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Filing: 1973-10-11
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Granted: 1975-05-13
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Expires: 1993-10-11
Abstract
Abstract A direct fired water heater comprising a rotary drum, a water inlet and a water outlet therefor, a burner generally centrally located in the drum, the burner being fixed, there being an inlet stator and an outlet stator having openings at different distances from the inner periphery of the drum providing a static pressure difference in the water.
Inventors
- 👤 Lothar A Huettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:41
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86276
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A liquid receptacle comprising a rotary cylindrical drum, said drum comprising a wall, closures for the drum at each end of the wall, means to rotate the drum, an inlet stator in the drum between the axis of the drum and the wall thereof, an outlet stator in the drum between the axis of the drum and the same wall thereof, the stators being open at their peripheries to provide for flow of liquid therethrough; the outlet stator periphery being closer to the wall than the inlet stator, the rotation of the drum causing liquid in the drum to form a ring along the drum wall, the stators being normally submerged at their outer peripheries within the ring of liquid, the stators each comprise a pair of spaced annular flat plates located in generally transverse planes relative to the axis of the drum.
Claim 2
Dependent Claim
143 words
A liquid receptacle comprising a rotary cylindrical drum, said drum comprising a wall, closures for the drum at each end of the wall, means to rotate the drum, an inlet stator in the drum between the axis of the drum and the wall thereof, an outlet stator in the drum between the axis of the drum and the same wall thereof, the stators being open at their peripheries to provide for flow of liquid therethrough; the outlet stator periphery being closer to the wall than the inlet stator, the rotation of the drum causing liquid in the drum to form a ring along the drum wall, the stators being normally submerged at their outer peripheries within the ring of liquid, the stators each comprise a pair of spaced annular flat plates located in generally transverse planes relative to the axis of the drum.
Claim 3
Dependent Claim
32 words
The receptacle of claim 1 including radial baffles in the drum adjacent the wall thereof. 3.. The receptacle of claim 2 including apertured circumferential baffles in the drum intersecting the radial baffle.
Claim 4
Dependent Claim
25 words
The receptacle of claim 1 including vanes between the plates of both the stators, said vanes assisting liquid flow into and out of the drum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |