US3917162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm valve for controlling supply of gas to water heater
Assignee: Individual
•
Filing: 1974-11-22
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Granted: 1975-11-04
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Expires: 1994-11-22
Abstract
Abstract Valve for controlling flow of gas to water heater comprises two chambers separated by a diaphragm. A first chamber has a gas inlet and a gas outlet leading to the burner of the heater. The outlet is controlled by the diaphragm position which is in turn dependent on the relative pressure in the chambers. A by-pass connects the two chambers, and the diaphragm position is therefore dependent on the exhaust from the second chamber, which is controlled in response to the flow of water to the heater and the temperature of the water.
Inventors
- 👤 Albin Trotter
- 👤 Ursus Trotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:31
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2035; F23; F23N; F23N1/00; F23N1/08; F23N1/085; F23N5/00; F23N5/02; F23N5/10; F23N5/107; F23Q; F23Q9/00; F23Q9/08; F23Q9/12; F23Q9/14; F23N2235/00; F23N2235/12; F23N2235/20; F23N2235/24; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
In a diaphragm valve for controlling the flow of gas to a water heater including a burner and equipped with a magnetic member responsive to variations in the flow of water to said heater, said valve comprising first and second chambers separated by a diaphragm, said first chamber being provided with a gas inlet and an outlet leading to said burner, and said diaphragm being movable between a first position closing said outlet and a second position in which said outlet is left open in dependence on the relative pressure in said chambers, the improvement which comprises duct means connecting said first and second chambers, and providing an exhaust for said second chamber, magnetically actuated valve means responsive to the position of said magnetic member and positioned to control the exhaust of gas from said second chamber through said duct means, and manually adjustable heat responsive valve means responsive to the temperature in said heater for additionally controlling the exhaust of gas from said second chamber through said duct means.
Claim 2
Dependent Claim
170 words
In a diaphragm valve for controlling the flow of gas to a water heater including a burner and equipped with a magnetic member responsive to variations in the flow of water to said heater, said valve comprising first and second chambers separated by a diaphragm, said first chamber being provided with a gas inlet and an outlet leading to said burner, and said diaphragm being movable between a first position closing said outlet and a second position in which said outlet is left open in dependence on the relative pressure in said chambers, the improvement which comprises duct means connecting said first and second chambers, and providing an exhaust for said second chamber, magnetically actuated valve means responsive to the position of said magnetic member and positioned to control the exhaust of gas from said second chamber through said duct means, and manually adjustable heat responsive valve means responsive to the temperature in said heater for additionally controlling the exhaust of gas from said second chamber through said duct means.
Claim 3
Dependent Claim
89 words
A valve as claimed in claim 1, in which said magnetically actuated valve comprises a magnetic piston movable inside a hollow body and actuated by the variations in the magnetic field between one end of said magnetic piston and the magnetic member responsive to the variations in the water flow, said piston being provided with a resilient disc attached to the end thereof remote from said one end and positioned to cooperate with a seat in said duct means to control the exhaust of gas from said second chamber.
Claim 4
Dependent Claim
63 words
A valve as claimed in claim 2, in which the resilient disc attached to said magnetic piston controls a connection between the second chamber of the diaphragm valve and a gas inlet to said burner, said connection being magnetically controlled in response to variations in the flow of water entering the water heater independently of variations in the temperature of the outlet water.
Claim 5
Dependent Claim
47 words
A valve as claimed in claim 1 in which said heat responsive valve means comprises a perforated pin in said duct means having in one end a gas outlet facing the conical end of a bellows responsive to the temperature of the water heated by said heater.
Claim 6
Dependent Claim
44 words
A valve as claimed in claim 4, in which said perforated pin is manually adjustable from outside the valve and said adjustment determines the amount of the maximum flow of exhaust gas and thereby determines the extent to which said diaphragm opens said outlet.
Claim 7
Dependent Claim
56 words
A valve as claimed in claim 5, in which said perforated pin is provided with at least one small diameter discharge orifice which permits a small exhaust flow sufficient to maintain a ''''minimum flame'''' at the burner even when the conical end of the bellows totally closes the outlet in the end of said perforated pin.
Claim 8
Dependent Claim
85 words
A valve as claimed in claim 1, which comprises an ignition retarding valve including a disc having at least one small orifice therein aligned with a larger orifice in said duct means, said disc being enclosed in a housing having at least one orifice leading to said second chamber, said disc being positioned to be lifted by gas flowing into said second chamber to permit rapid charging thereof, but depressed to partially obstruct said larger orifice when gas is being exhausted from said second chamber.
Claim 9
Dependent Claim
54 words
A valve as claimed in claim 1 comprising electromagnetic closure means connected to cut off the flow of gas to said burner whenever a pilot light is unlit, and an activator pin capable of opening said closure means only when a main valve controlling gas flow to said burner is in its closed position.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |