Patent US3596639A successfully refreshed from Google Patents.
US3596639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping sleeve heater
Assignee: American Radiator and Standard Sanitary Corp
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Filing: 1969-08-11
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Granted: 1971-08-03
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Expires: 1989-08-11
Abstract
Abstract A fluid heater, primarily for water, wherein the hot combustion gases and heat-absorbing fluid flow through separate sinuous passage systems formed by four telescoping sleeves and radially spaced partitions in the annular spaces between adjacent sleeves.
Inventors
- 👤 Raymond A Hemmert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:53
CPC Classifications
F; F22; F22B; F22B7/00; F22B7/12; F24; F24H; F24H1/00; F24H1/22; F24H1/24; F24H1/26; F24H1/28; F24H1/282
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
223 words
A fluid heater comprising four telescoping sleeves, including a first inner sleeve, a second intermediate sleeve larger in diameter than the first, a third intermediate sleeve larger in diameter than the second, and a fourth outer sleeve larger in diameter than the third; front closure means for the annular space between the inner and outer sleeves; rear closure means for the space circumscribed by the fourth sleeve; the inner sleeve constituting a combustion tube for reception of burning gases flowing from front-to-rear; the space immediately forward of the rear closure means constituting a hot gas reversal zone; the annular space between the first and second sleeves constituting a primary heat-absorbing chamber; the annular space between the second and third sleeves constituting a secondary hot gas chamber; the annular space between the third and fourth sleeves constituting a secondary heat-absorbing chamber; port means connecting the gas reversal zone with the secondary hot gas chamber; said primary heat-absorbing chamber and said secondary hot gas chamber having longitudinal partitions therein subdividing the respective chambers into longitudinal passages having segmental cross sections, successive ones of said passages in the respective chambers having fluid connections with one another at different ends of the heater whereby the hot gases and heated fluid are required to flow longitudinally back and forth in sinuous paths in order to traverse the heater.
Claim 2
Dependent Claim
223 words
A fluid heater comprising four telescoping sleeves, including a first inner sleeve, a second intermediate sleeve larger in diameter than the first, a third intermediate sleeve larger in diameter than the second, and a fourth outer sleeve larger in diameter than the third; front closure means for the annular space between the inner and outer sleeves; rear closure means for the space circumscribed by the fourth sleeve; the inner sleeve constituting a combustion tube for reception of burning gases flowing from front-to-rear; the space immediately forward of the rear closure means constituting a hot gas reversal zone; the annular space between the first and second sleeves constituting a primary heat-absorbing chamber; the annular space between the second and third sleeves constituting a secondary hot gas chamber; the annular space between the third and fourth sleeves constituting a secondary heat-absorbing chamber; port means connecting the gas reversal zone with the secondary hot gas chamber; said primary heat-absorbing chamber and said secondary hot gas chamber having longitudinal partitions therein subdividing the respective chambers into longitudinal passages having segmental cross sections, successive ones of said passages in the respective chambers having fluid connections with one another at different ends of the heater whereby the hot gases and heated fluid are required to flow longitudinally back and forth in sinuous paths in order to traverse the heater.
Claim 3
Dependent Claim
79 words
The heater of claim 1 comprising a baffle going across the annular space between the second and third sleeves adjacent their rear ends; said baffle having an opening therethrough placing the hot gas reversal zone in fluid communication with one of the passages in the secondary hot gas chamber; said opening constituting the aforementioned port means said baffle comprising a hollow chamber having fluid communication with the space between the third and fourth sleeves, whereby the baffle is fluid-cooled.
Claim 4
Dependent Claim
29 words
The fluid heater of claim 1 wherein said port means if formed by a baffle which takes takes the form of a refractory wall partially encircling the second sleeve.
Claim 5
Dependent Claim
69 words
The heater of claim 1 wherein the front closure means comprises a first seal means for the annular space between the first and third sleeves, and a second seal means for the annular space between the third and fourth sleeves; the first and second sleeves cooperating with the first seal means to form an integral subassembly which can be drawn out of the space circumscribed by the third sleeve.
Claim 6
Dependent Claim
83 words
The heater of claim 4 and further comprising a fluid crossover pipe connecting one of the passages in the primary heat-absorbing chamber with one of the passages in the secondary heat-absorbing chamber; said pipe having one of its ends attached to the first seal means and its other end attached to the fourth sleeve; said pipe being located outside the four sleeves whereby disconnection of the pipe allows the aforementioned subassembly to be drawn out from the space circumscribed by the third sleeve.
Claim 7
Dependent Claim
30 words
The heater of claim 1 and further comprising fluid inlet means mounted on the front closure means in direct connection with one of the passages in the primary heat-absorbing chamber.
Claim 8
Dependent Claim
44 words
The heater of claim 1 wherein the first sleeve is provided with an inturned wall section adjacent at least one of its ends; said inturned wall section being capable of deflecting movements incident to thermal elongation of the first sleeve, thereby relieving thermal stress.
Claim 9
Dependent Claim
42 words
The heater of claim 1 wherein at least some of the longitudinal partitions are formed as hollow ribs protruding from the sleeves; said hollow ribs being integral with the sleeves so that sleeve fluid or gas flows into the rib hollow spaces.
Claim 10
Dependent Claim
56 words
The heater of claim 1 wherein the longitudinal partitions in the secondary hot gas chamber are shorter than the chamber length; successive ones of said last-mentioned partitions being alternately staggered toward or away from the front closure means, whereby the spaces between the end edges of the partitions and adjacent closure means constitute gas flow openings.
Claim 11
Dependent Claim
68 words
The heater of claim 1 wherein the partitions between the second and third sleeves comprise three partitions cooperating to define three passages arranged in series flow relation, the first one of the three passages being about 150 radial degrees measured circumferentially, the second one of the three passages being about 120 radial degrees measured circumferentially, and the third one of the three passages being about 90* measured circumferentially.
Claim 12
Dependent Claim
124 words
A fluid heater comprising a plurality of telescoping sleeves arranged one within another to define a central hot gas chamber, and a series of annular chambers surrounding said central chamber; at least one of said annular chambers being connected with the central chamber to receive hot gases therefrom; at least one of the annular chambers being adapted to have heat-absorbing fluid flow therethrough; at least some of the annular hot gas chambers and some of the annular fluid chambers having longitudinal partitions therein subdividing same into longitudinal passages, which are in succession connected together at different ends of the heater whereby the hot gases and heated fluid are caused to flow longitudinally back and forth in sinuous paths as they traverse their respective chambers.
Claim 13
Dependent Claim
124 words
A fluid heater comprising a plurality of telescoping sleeves arranged one within another to define a central hot gas chamber, and a series of annular chambers surrounding said central chamber; at least one of said annular chambers being connected with the central chamber to receive hot gases therefrom; at least one of the annular chambers being adapted to have heat-absorbing fluid flow therethrough; at least some of the annular hot gas chambers and some of the annular fluid chambers having longitudinal partitions therein subdividing same into longitudinal passages, which are in succession connected together at different ends of the heater whereby the hot gases and heated fluid are caused to flow longitudinally back and forth in sinuous paths as they traverse their respective chambers.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |