US3800748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid heater appliance
Assignee: MMS Ltd
•
Filing: 1973-01-08
•
Granted: 1974-04-02
•
Expires: 1993-01-08
Abstract
Abstract A fluid heating appliance of the stackless type particularly adapted for heating swimming pool water. A rectangular housing or cabinet is assembled and contains a combustion chamber, a heat exchanger capable of carrying the fluid to be heated and disposed within said combustion chamber whereby to intercept the flow of combustion products, a flue collector immediately adjacent said heat exchanger, a flue products outlet chamber or duct adjacent said flue collector and adapted to receive the combustion products from the flue collector and having an outlet for discharge of collected combustion products to the atmosphere, a fresh-air intake, a control chamber communicating between said fresh-air intake and said combustion chamber, a restricted aperture disposed between said fresh-air intake and said control chamber for aspirating a given quantity of air to the control chamber and at least one passageway communicating between said fresh-air intake and the exterior of the appliance by-passing said control chamber whereby in adverse weather conditions, any excessive quantity of air is directed by way of said passageway for discharge to the atmosphere by-passing said control chamber, yet without requiring the use of additional draft diverters, baffles, spoilers and the like structures.
Inventors
- 👤 H Schindler
- 👤 W Ware
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:44
CPC Classifications
F; F24; F24H; F24H1/00; F24H1/10; F24H1/12; F24H1/14; F24H1/145
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
192 words
A fluid heater comprising a housing, means defining airintake means for introducing atmospheric air into the cabinet, means defining a combustion chamber interior of the housing, fuel burner means within said combustion chamber, control chamber means communicating between said air-intake means and said combustion chamber means for feeding air thereinto, flue collector means disposed within said housing to receive the flue products of combustion from the combustion chamber means, heat transfer means interposed between the flue collector means and the combustion chamber means in intercepting relation to the path of said flue products and capable of transferring generated heat energy from said flue products to a fluid carried within said heat transfer means, means defining an outlet duct communicating with said flue collector means, said outlet duct including port means for discharging said flue products from said outlet duct to the exterior of the housing and means for aspirating atmospheric air from said air-intake means to the control chamber means in controlled quantities and including means capable of directing quantities of air in excess of said controlled quantity from said air-intake means to the exterior of said housing by-passing said control chamber.
Claim 2
Dependent Claim
192 words
A fluid heater comprising a housing, means defining airintake means for introducing atmospheric air into the cabinet, means defining a combustion chamber interior of the housing, fuel burner means within said combustion chamber, control chamber means communicating between said air-intake means and said combustion chamber means for feeding air thereinto, flue collector means disposed within said housing to receive the flue products of combustion from the combustion chamber means, heat transfer means interposed between the flue collector means and the combustion chamber means in intercepting relation to the path of said flue products and capable of transferring generated heat energy from said flue products to a fluid carried within said heat transfer means, means defining an outlet duct communicating with said flue collector means, said outlet duct including port means for discharging said flue products from said outlet duct to the exterior of the housing and means for aspirating atmospheric air from said air-intake means to the control chamber means in controlled quantities and including means capable of directing quantities of air in excess of said controlled quantity from said air-intake means to the exterior of said housing by-passing said control chamber.
Claim 3
Dependent Claim
95 words
The fluid heater as claimed in claim 1 wherein said housing includes front, rear and side walls, said air-intake means comprising plural perforations formed at least in said side walls near the upper portions thereof between said front and rear walls, and said aspirating means comprises at least one passageway formed interior of said housing, said plural perforations opening into said passageway and means deFining a restricted orifice interposed between said passageway and said control chamber and said passageway also opening to the exterior of said housing at a location spaced from said control chamber.
Claim 4
Dependent Claim
40 words
The fluid heater as claimed in claim 2 in which said means defining a restricted orifice comprises a wall separating said passageway from said control chamber and an aperture defining the sole entry to said control chamber through said wall.
Claim 5
Dependent Claim
26 words
The fluid heater as claimed in claim 3 in which said means defining a restricted orifice includes valve means for varying the diameter of said aperture.
Claim 6
Dependent Claim
24 words
The fluid heater as claimed in claim 2 in which said housing and said flue collector is in heat exchange relation with said passageway.
Claim 7
Dependent Claim
20 words
The fluid heater as claimed in claim 1 in which said housing includes a cover defining the top wall thereof.
Claim 8
Dependent Claim
34 words
The fluid heater as claimed in claim 6 in which said cover forms one wall of said outlet duct and port means formed in said cover for discharging said flue products from said duct.
Claim 9
Dependent Claim
32 words
The fluid heater as claimed in claim 6 in which said port means includes an outlet spaced from the edges of said cover and second cover means removably secured to said cover.
Claim 10
Dependent Claim
27 words
The fluid heater as claimed in claim 1 in which said combustion chamber is spaced from the walls of said housing to substantially define surrounding dead-air spaces.
Claim 11
Dependent Claim
35 words
The fluid heater as claimed in claim 1 in which said housing includes an upper covering wall and said covering wall has perforations formed therein, said covering wall forming one wall of said outlet duct.
Claim 12
Dependent Claim
33 words
The fluid heater as claimed in claim 7 in which said port means includes at least two groups of perforations formed in said cover and arranged spaced apart one group from the other.
Claim 13
Dependent Claim
25 words
The fluid heater as claimed in claim 10 in which said perforations are arranged in at least two groups, one group spaced from the other.
Claim 14
Dependent Claim
20 words
The fluid heater as claimed in claim 12 in which there is a removably covered port disposed between said groups.
Claim 15
Dependent Claim
26 words
The fluid heater as claimed in claim 2 in which said plural perforations are arranged in at least one row along the side and rear walls.
Claim 16
Dependent Claim
49 words
The fluid heater as claimed in claim 2 in which said outlet duct is disposed over said flue collector means and extending across substantially the entire upper portion of the housing, said housing including a top wall defining, with said side walls, front and rear walls, said outlet duct.
Claim 17
Dependent Claim
38 words
The fluid heater as claimed in claim 15 in which said passageway is defined between the housing and the flue collector and extends along the side and rear wall of said housing, said perforations opening to said passageway.
Claim 18
Dependent Claim
33 words
The fluid heater as claimed in claim 1 in which said port means comprise plural perforations formed in the end walls of the duct at the front and rear walls of the housing.
Claim 19
Dependent Claim
15 words
The fluid heater as claimed in claim 17 in which said end walls are recessed.
Claim 20
Dependent Claim
81 words
The fluid heater as claimed in claim 16 in which said top wall is spaced from the upper ends of said front, rear and side walls of said housing, imperforate spacing wall means secured to the top wall and to the upper ends of said front, rear and side walls to define a recess, and said port means comprise perforations formed in said spacing wall means whereby to define a clear channel opening to the front and rear of the housing.
Claim 21
Dependent Claim
47 words
The fluid heater as claimed in claim 19 in which there is an interior horizontal wall seated upon said flue collector means and forming the bottom wall of said outlet duct, said horizontal wall having a port formed therein arranged to communicate with said flue collector means.
Claim 22
Dependent Claim
32 words
The fluid heater as claimed in claim 20 in which said interior horizontal wall is spaced from said spacing wall means to define a path communicating to at least one said passageway.
Claim 23
Dependent Claim
220 words
A fluid heating device comprising a housing, a combustion chamber within the housing, burner means for comBusting fuel within said combustion chamber, heat transfer means capable of carrying fluid and disposed in communication with said combustion chamber to intercept the combustion products for transferring the generated heat energy from said combustion products to the fluid, wall means defining at least two inlet chambers within said housing, air-intake means formed in said housing in communication with said inlet chambers, means defining a passageway between said inlet chambers and communicating to said combustion chamber and burner means, flue collector means for receiving said combustion products subsequent to passage thereof past said heat transfer means, means defining at least one outlet chamber in communication with said flue collector, first port means formed in said flue collector to enable passage of combustion products thereinto and second port means formed in said outlet chamber for discharge of said combustion products to the exterior of said housing and air-flow restriction means disposed within said passageway whereby a given quantity of air from said air-intake means is introduced into said combustion chamber and burner means and air quantities in excess of said given quantity are directed through said housing by way of said inlet chambers to and through said air-intake means to the exterior of the housing.
Claim 24
Dependent Claim
220 words
A fluid heating device comprising a housing, a combustion chamber within the housing, burner means for comBusting fuel within said combustion chamber, heat transfer means capable of carrying fluid and disposed in communication with said combustion chamber to intercept the combustion products for transferring the generated heat energy from said combustion products to the fluid, wall means defining at least two inlet chambers within said housing, air-intake means formed in said housing in communication with said inlet chambers, means defining a passageway between said inlet chambers and communicating to said combustion chamber and burner means, flue collector means for receiving said combustion products subsequent to passage thereof past said heat transfer means, means defining at least one outlet chamber in communication with said flue collector, first port means formed in said flue collector to enable passage of combustion products thereinto and second port means formed in said outlet chamber for discharge of said combustion products to the exterior of said housing and air-flow restriction means disposed within said passageway whereby a given quantity of air from said air-intake means is introduced into said combustion chamber and burner means and air quantities in excess of said given quantity are directed through said housing by way of said inlet chambers to and through said air-intake means to the exterior of the housing.
Claim 25
Dependent Claim
50 words
The fluid heating device as claimed in claim 22 in which at least one wall of each inlet chamber is defined by said flue collector and another wall thereof is defined by said housing, said last mentioned wall having a plurality of perforations formed therein and comprising said air-intake means.
Claim 26
Dependent Claim
26 words
The fluid heating device as claimed in claim 22 wherein at least one wall of each inlet chamber is in heat-exchange relationship with said flue collector.
Claim 27
Dependent Claim
40 words
The fluid heating device as claimed in claim 22 in which said wall means defining said inlet chambers and said passageway include said flue collector, and said air-intake means comprises a plurality of perforations substantially co-extensive with said inlet chambers.
Claim 28
Dependent Claim
33 words
The fluid heating device as claimed in claim 22 and means interior of said housing defining a feeding chamber forming a flow path leading to said combustion chamber from said air-flow restriction means.
Claim 29
Dependent Claim
18 words
The fluid heating device as claimed in claim 26 in which said air-flow restrictor means comprise valve means.
Claim 30
Dependent Claim
95 words
The fluid heating device as claimed in claim 26 in which said feeding chamber includes radiation shield means interposed in the air-flow path adjacent the entrance to said combustion chamber, said radiation shield means including leg means defining a first path adjacent said housing and leading to said combustion chamber and a second path between said leg means, said burner means being arranged in said second path whereby primary air is introduced therein for mixing with said fuel and secondary air is introduced to said combustion chamber by way of said first and second paths.
Claim 31
Dependent Claim
27 words
The fluid heating device as claimed in claim 28 in which baffle means is formed in said leg means in intercepting relation relative to said first path.
Claim 32
Dependent Claim
55 words
The fluid heater as claimed in claim 22 in which said second port means comprises openings formed in a pair of oppositely disposed walls of said outlet chamber to define a path in a direction substantially normal to the axis of said first port means and the flow of combustion products into said outlet chamber.
Claim 33
Dependent Claim
33 words
The fluid heater as claimed in claim 22 in which said second port means comprises at least one opening formed in the wall of said outlet chamber opposite to the first port means.
Claim 34
Dependent Claim
29 words
The fluid heater as claimed in claim 31 in which said first and second port means are axially aligned to enable introduction of an exterior tubular stack member therethrough.
Claim 35
Dependent Claim
25 words
The fluid heater as claimed in claim 22 in which said second port means includes plural openings formed in said wall of said outlet chamber.
Claim 36
Dependent Claim
25 words
The fluid heater as claimed in claim 33 in which said plural openings are disposed in at least two groups spaced one from the other.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |