Patent US3025389A successfully refreshed from Google Patents.
Patent US3861586A successfully refreshed from Google Patents.
US3861586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic flow control device
Assignee: Robertshaw Controls Co
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Filing: 1973-08-15
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Granted: 1975-01-21
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Expires: 1993-08-15
Abstract
Abstract A thermostatic flow control device including a safety valve and a thermostatic valve controlling flow between an inlet and main and pilot outlets in a casing, a selector dial for moving a cam member within the casing, and a lever pivotally and slidably mounted in the casing and selectively controlled by the cam member, the safety and thermostatic valves having members engaging the lever and axially movable by pivoting and sliding movement of the lever, respectively, such that movement of the selector dial provides simultaneous pilot and on-off control of the safety and thermostatic valves.
Inventors
- 👤 Jay R Katchka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:14
CPC Classifications
F; F23; F23Q; F23Q9/00; F23Q9/08
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
197 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner, and flow passage means disposed between said inlet means and said outlet means; safety valve means including a safety valve seat disposed in said flow passage means, a safety valve member cooperating with said safety valve seat for controlling fuel flow through said flow passage means and first axially movable means for controlling movement of said safety valve member; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means including a thermostatic valve seat disposed in said flow passage means, a thermostatic valve member cooperating with said thermostatic valve seat to control fuel flow through said flow passage means, and second axially movable means controlling movement of said thermostatic valve member; thermostat means controlling operation of said thermostatic valve means in response to temperature variations; and selector means for simultaneously controlling said safety valve means and said thermostatic valve means including a lever engaging said first and second axially movable means to control axial movement thereof.
Claim 2
Dependent Claim
197 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner, and flow passage means disposed between said inlet means and said outlet means; safety valve means including a safety valve seat disposed in said flow passage means, a safety valve member cooperating with said safety valve seat for controlling fuel flow through said flow passage means and first axially movable means for controlling movement of said safety valve member; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means including a thermostatic valve seat disposed in said flow passage means, a thermostatic valve member cooperating with said thermostatic valve seat to control fuel flow through said flow passage means, and second axially movable means controlling movement of said thermostatic valve member; thermostat means controlling operation of said thermostatic valve means in response to temperature variations; and selector means for simultaneously controlling said safety valve means and said thermostatic valve means including a lever engaging said first and second axially movable means to control axial movement thereof.
Claim 3
Dependent Claim
26 words
A thermostatic flow control device as recited in claim 1 wherein said lever is pivotally mounted on one of said first or second axially movable means.
Claim 4
Dependent Claim
22 words
A thermostatic flow control device as recited in claim 1 wherein said selector means includes cam means for selectively operating said lever.
Claim 5
Dependent Claim
57 words
A thermostatic flow control device as recited in claim 3 wherein said lever has a fulcrum portion and first and second cam follower portions and said cam means includes first and second cam surfaces for engaging said first and second cam follower portions, respectively, to control movement of said fulcrum portion and pivotal movement of said lever.
Claim 6
Dependent Claim
19 words
A thermostatic flow control device as recited in claim 4 wherein said cam means is a single cam member.
Claim 7
Dependent Claim
49 words
A thermostatic flow control device as recited in claim 5 wherein said cam member is rotatably mounted in said casing and has a drum-like configuration with a top wall and first and second spaced walls depending from said top wall to define said first and second cam surfaces, respectively.
Claim 8
Dependent Claim
24 words
A thermostatic flow control device as recited in claim 1 wherein said selector means includes a single cam member for selectively operating said lever.
Claim 9
Dependent Claim
34 words
A thermostatic flow control device as recited in claim 1 wherein said first axially movable means includes an operator carrying said safety valve member and said lever has an end slidably receiving said operator.
Claim 10
Dependent Claim
41 words
A thermostatic flow control device as recited in claim 8 wherein said safety means includes a reset button axially aligned with said operator and movable to abut said operator to move said safety valve member away from said safety valve seat.
Claim 11
Dependent Claim
88 words
A thermostatic flow control device as recited in claim 9 wherein said operator has means extending therefrom for limiting movement of said end of said lever, said safety valve means includes first spring means biasing said operator in a direction to move said safety valve member away from said safety valve seat, and said safety means includes second spring means biasing said operator in a direction to move said safety valve member toward said safety valve seat, said second spring means being stronger than said first spring means.
Claim 12
Dependent Claim
35 words
A thermostatic flow control device as recited in claim 1 wherein said second axially movable means includes a plunger axially movable to control said thermostatic valve means and having an end pivotally supporting said lever.
Claim 13
Dependent Claim
44 words
A thermostatic flow control device as recited in claim 11 wherein said lever is slidably mounted in said casing and said selector means includes a cam member engaging said lever and movable to slide said lever in said casing to axially move said plunger.
Claim 14
Dependent Claim
86 words
A thermostatic flow control device as recited in claim 12 wherein said thermostatic valve means includes a valve stem carrying said thermostatic valve member and having an end disposed to abut said plunger and means for biasing said plunger away from said valve stem and toward said lever and further comprising override means for preventing movement of said valve member in response to said thermostat means when said lever slides in said casing to axially move said plunger to abut said end of said valve stem.
Claim 15
Dependent Claim
123 words
A thermostatic flow control device as recited in claim 13 wherein said first axially movable means is disposed in parallel with said second axially movable means and includes an operator carrying said safety valve member and having stop means extending therefrom, said lever has an end slidably receiving said operator and limited in movement along said operator by said stop means, said safety valve means includes first spring means biasing said operator in a direction to move said safety valve member away from said safety valve seat, and said safety means includes second spring means biasing said operator in a direction to move said safety valve member toward said safety valve seat said second spring means being stronger than said first spring means.
Claim 16
Dependent Claim
173 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner and flow passage means disposed between said inlet means and said outlet means; safety valve means disposed in said casing for controlling fuel flow through said flow passage means; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means disposed in said casing for controlling fuel flow through said flow passage means; thermostat means controlling operation of said thermostatic valve means in response to temperture variations; and selector means including lever means pivotally and slidably mounted in said casing and means for selectively pivoting and sliding said lever means to simultaneously control said safety valve means and said thermostatic valve means, said selector means also including a cam member having a first cam surface for pivoting said lever means and a second cam surface for sliding said lever means in said casing.
Claim 17
Dependent Claim
173 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner and flow passage means disposed between said inlet means and said outlet means; safety valve means disposed in said casing for controlling fuel flow through said flow passage means; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means disposed in said casing for controlling fuel flow through said flow passage means; thermostat means controlling operation of said thermostatic valve means in response to temperture variations; and selector means including lever means pivotally and slidably mounted in said casing and means for selectively pivoting and sliding said lever means to simultaneously control said safety valve means and said thermostatic valve means, said selector means also including a cam member having a first cam surface for pivoting said lever means and a second cam surface for sliding said lever means in said casing.
Claim 18
Dependent Claim
107 words
A thermostatic flow control device as recited in claim 15 wherein said cam member has an off position for pivoting said lever means to close said safety valve means and sliding said lever means in said casing to a position to close said thermostatic valve means, a pilot position for pivoting said lever means to permit said safety valve means to be opened and maintaining said lever means at said position to close said thermostatic valve means, and a on position for permitting said safety valve means to bE opened and for permitting said thermostatic valve means to be opened under the control of said thermostat means.
Claim 19
Dependent Claim
116 words
A thermostatic flow control device as recited in claim 15 wherein said cam member is rotatably mounted in said casing and has a drum-like configuration with inner and outer radially spaced, arcuate walls defining said first and second cam surfaces, and said lever means includes a lever having a first end controlling said safety valve means, a second end forming a cam follower positioned to be engaged by said inner wall, a fulcrum portion disposed between said first and second ends for controlling said thermostatic valve means and pivotally mounting said lever on said thermostatic valve means, and a pair of cam follower extensions extending from opposite sides of said lever for engaging said outer wall.
Claim 20
Dependent Claim
151 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner and flow passage means disposed between said inlet means and said outlet means; safety valve means disposed in said casing for controlling fuel flow through said flow passage means; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means disposed in said casing for controlling fuel flow through said flow passage means; thermostat means controlling operation of said thermostatic valve means in response to temperature variations; and selector means including lever means ivotally and slidably mounted in said casing and means for selectively pivoting and sliding said lever means to simultaneously control said safety valve means and said thermostatic valve means, said lever means being formed of a single lever.
Claim 21
Dependent Claim
151 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner and flow passage means disposed between said inlet means and said outlet means; safety valve means disposed in said casing for controlling fuel flow through said flow passage means; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means disposed in said casing for controlling fuel flow through said flow passage means; thermostat means controlling operation of said thermostatic valve means in response to temperature variations; and selector means including lever means ivotally and slidably mounted in said casing and means for selectively pivoting and sliding said lever means to simultaneously control said safety valve means and said thermostatic valve means, said lever means being formed of a single lever.
Claim 22
Dependent Claim
163 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner and flow passage means disposed between said inlet means and said outlet means; safety valve means disposed in said casing for controlling fuel flow through said flow passage means; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means disposed in said casing for controlling fuel flow through said flow passage means; thermostat means controlling operation of said thermostatic valve means in response to temperature variations; and selector means including lever means pivotally and slidably mounted in said casing and means for selectively pivoting and sliding said lever means to simultaneously control said safety valve means and said thermostatic valve means, said thermostatic valve means including an axially movable member, and said lever means being pivotally mounted on said axially movable member.
Claim 23
Dependent Claim
163 words
A thermostatic flow control device comprising a casing having inlet means adapted to receive fuel from a source, outlet means adapted to supply the fuel to a burner and flow passage means disposed between said inlet means and said outlet means; safety valve means disposed in said casing for controlling fuel flow through said flow passage means; safety means controlling operation of said safety valve means in response to the existence of a flame at the burner; thermostatic valve means disposed in said casing for controlling fuel flow through said flow passage means; thermostat means controlling operation of said thermostatic valve means in response to temperature variations; and selector means including lever means pivotally and slidably mounted in said casing and means for selectively pivoting and sliding said lever means to simultaneously control said safety valve means and said thermostatic valve means, said thermostatic valve means including an axially movable member, and said lever means being pivotally mounted on said axially movable member.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |