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US4819442A Expired / Lapsed US ⏱️ 0.0 years remaining

Refrigerator system, control device therefor and methods of making and operating the same

Assignee: Robertshaw Controls Co
•
Filing: 1988-02-24
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Granted: 1989-04-11
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Expires: 2008-02-24
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Abstract

Abstract A refrigerator system, a control device therefor and methods of making and operating the same are provided, the system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating unit that has a control valve unit therein for controlling the amount of opening of the air circulating unit between the compartments, the control valve unit comprising a housing having a movable valve member and a temperature sensing unit operatively interconnected to the valve member to control the position of the valve member in relation to the temperature sensed by the temperature sensing unit, the system having a fan for forcing an air flow through the air circulating unit from the frozen food compartment to the non-frozen food compartment when the fan is operating and the valve member is in an open condition thereof, the system having structure for causing the fan to be operating only when the valve member is in a certain open condition thereof.

Inventors

  • 👤 Roger P. Sepso
  • 👤 Charles J. Everett

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 14:29
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/042; F25D17/045

Claims Analysis

Total Claims: 32
Claim 1
Independent Claim 168 words
In a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said control valve means comprising a housing means having a movable valve member and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, said system having a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement wherein said movable means of said temperature sensing means is operatively internconnected to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 2
Dependent Claim 168 words
In a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said control valve means comprising a housing means having a movable valve member and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, said system having a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement wherein said movable means of said temperature sensing means is operatively internconnected to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 3
Dependent Claim 252 words
In a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said control valve means comprising a housing means having a movable valve member and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, said system having a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement wherein said system has means for causing said fan means to be operating only when said valve member is in a certain open condition thereof, said means of said system for causing said fan means to be operating only when said valve member is in a certain open condition thereof comprising an electrical switch means carried by said housing means, said switch means causing said fan means to be operating only when said switch means is actuated to a certain condition thereof, said temperature sensing means having means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 4
Dependent Claim 252 words
In a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said control valve means comprising a housing means having a movable valve member and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, said system having a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement wherein said system has means for causing said fan means to be operating only when said valve member is in a certain open condition thereof, said means of said system for causing said fan means to be operating only when said valve member is in a certain open condition thereof comprising an electrical switch means carried by said housing means, said switch means causing said fan means to be operating only when said switch means is actuated to a certain condition thereof, said temperature sensing means having means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 5
Dependent Claim 35 words
A system as set forth in claim 2 wherein said means of said temperature sensing means that is operatively interconnected to said switch means comprises a lever that is pivotally mounted to said housing means.
Claim 6
Dependent Claim 58 words
A system as set forth in claim 3 wherein said switch means has an axially movable plunger means which when moved a certain amount actuate said switch means, said lever having an abutment means that is adapted to be in engagement with said plunger means whereby said plunger means is adapted to move in unison with said lever.
Claim 7
Dependent Claim 19 words
A system as set forth in claim 4 wherein said switch means is adjustably mounted to said housing means.
Claim 8
Dependent Claim 32 words
A system as set forth in claim 5 wherein said housing means has an exterior surface means, said switch means being slideably mounted on said exterior surface means of said housing means.
Claim 9
Dependent Claim 171 words
In a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said control device comprising a housing means having a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement wherein said movable means of said temperature sensing means is adapted to be operatively interconnected to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 10
Dependent Claim 171 words
In a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said control device comprising a housing means having a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement wherein said movable means of said temperature sensing means is adapted to be operatively interconnected to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 11
Dependent Claim 257 words
In a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said control device comprising a housing means having a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement wherein said control device has means for causing said fan means to be operating only when said valve member is in a certain open condition thereof, said means of said control device for causing said fan means to be operating only when said valve member is in a certain open condition thereof comprising an electrical switch means carried by said housing means, said switch means being adapted to cause said fan means to be operating only when said switch means is actuated to a certain condition thereof, said temperature sensing means having means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 12
Dependent Claim 257 words
In a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said control device comprising a housing means having a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement wherein said control device has means for causing said fan means to be operating only when said valve member is in a certain open condition thereof, said means of said control device for causing said fan means to be operating only when said valve member is in a certain open condition thereof comprising an electrical switch means carried by said housing means, said switch means being adapted to cause said fan means to be operating only when said switch means is actuated to a certain condition thereof, said temperature sensing means having means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 13
Dependent Claim 36 words
A control device as set forth in claim 8 wherein said means of said temperature sensing means that is operatively interconnected to said switch means comprises a lever that is pivotally mounted to said housing means.
Claim 14
Dependent Claim 59 words
A control device as set forth in claim 9 wherein said switch means has an axially movable plunger means which when moved a certain amount actuates said switch means, said enggement with said plunger means whereby said plunger means lever having an abutment means that is adapted to be in is adapted to move in unison with said lever.
Claim 15
Dependent Claim 20 words
A control device as set forth in claim 10 wherein said switch means is adjustably mounted to said housing means.
Claim 16
Dependent Claim 33 words
A control device as set forth in claim 11 wherein said housing means has an exterior surface means, said switch means being slideably mounted on said exterior surface means of said housing means.
Claim 17
Dependent Claim 189 words
In a method of making a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said method comprising the step of forming said control device to have a housing means provided with a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement comprising the step of forming said movable means of said temperature sensing means to be adapted to be operatively interconnected to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 18
Dependent Claim 189 words
In a method of making a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said method comprising the step of forming said control device to have a housing means provided with a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement comprising the step of forming said movable means of said temperature sensing means to be adapted to be operatively interconnected to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 19
Dependent Claim 282 words
In a method of making a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said method comprising the step of forming said control device to have a housing means provided with a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement comprising the steps of forming said control device to have means for causing said fan means to be operating only when said valve member is in a certain open conditions thereof, forming said means of said control device for causing said fan means to be operating only when said valve member is in a certain open condition thereof to comprise an electrical switch means carried by said housing means, forming said switch means to be adapted to cause said fan means to be operating only when said switch means is actuated to a certain condition thereof, and forming said temperature sensing means to have means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 20
Dependent Claim 282 words
In a method of making a control device for a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a fan means therein for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and a valve member of the control device is in an open condition thereof, said method comprising the step of forming said control device to have a housing means provided with a movable valve member for controlling the amount of opening of said air circulating means between said compartments and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, the improvement comprising the steps of forming said control device to have means for causing said fan means to be operating only when said valve member is in a certain open conditions thereof, forming said means of said control device for causing said fan means to be operating only when said valve member is in a certain open condition thereof to comprise an electrical switch means carried by said housing means, forming said switch means to be adapted to cause said fan means to be operating only when said switch means is actuated to a certain condition thereof, and forming said temperature sensing means to have means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 21
Dependent Claim 46 words
A method of making a control device as set forth in claim 14 and including the step of forming said means of said temperature sensing means that is operatively interconnected to said switch means to comprise a lever that is pivotally mounted to said housing means.
Claim 22
Dependent Claim 72 words
A method of making a control device as set forth in claim 15 and including the steps of forming said switch means to have an axially movable plunger means which when moved a certain amount actuates said switch means, and forming said lever to have an abutment means that is adapted to be in engagement with said plunger means whereby said plunger means is adapted to move in unison with said lever.
Claim 23
Dependent Claim 30 words
A method of making a control device as set forth in claim 16 and including the step of forming said switch mean to be adjustably mounted to said housing means.
Claim 24
Dependent Claim 46 words
A method of making a control device as set forth in claim 17 and including the steps of forming said housing means to have an exterior surface means, and forming said switch means to be slideably mounted on said exterior surface means of said housing means.
Claim 25
Dependent Claim 186 words
In a method of making a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said method comprising the steps of forming said control valve means to have a housing means provided with a movable valve member and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, and forming said system to have a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement comprising the step of operatively interconnecting said movable means of said temperature sensing mean to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 26
Dependent Claim 186 words
In a method of making a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said method comprising the steps of forming said control valve means to have a housing means provided with a movable valve member and a temperature sensing means having movable means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, and forming said system to have a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement comprising the step of operatively interconnecting said movable means of said temperature sensing mean to said fan means for causing said fan means to be operating only when said valve member is in a certain open condition thereof.
Claim 27
Dependent Claim 284 words
In a method of making a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said method comprising the steps of forming said control valve means to have a housing means provided with a movable valve member and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, and forming said system to have a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement comprising the steps of forming said system to have means for causing said fan means to be operating only when said valve member is in a certain open condition thereof, forming said means of said control device for causing said fan means to be operating only when said valve member is in a certain open condition thereof to comprise an electrical switch means carried by said housing means, forming said switch means to be adapted to cause said fan means to be operating only when said switch means is actuated to a certain condition thereof, and forming said temperature sensing means to have means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 28
Dependent Claim 284 words
In a method of making a refrigerator system having a frozen food compartment and a non-frozen food compartment interconnected together by an air circulating means that has a control valve means therein for controlling the amount of opening of said air circulating means between said compartments, said method comprising the steps of forming said control valve means to have a housing means provided with a movable valve member and a temperature sensing means operatively interconnected to said valve member to control the position of said valve member in relation to the temperature sensed by said temperature sensing means, and forming said system to have a fan means for forcing an air flow through said air circulating means from said frozen food compartment to said non-frozen food compartment when said fan means is operating and said valve member is in an open condition thereof, the improvement comprising the steps of forming said system to have means for causing said fan means to be operating only when said valve member is in a certain open condition thereof, forming said means of said control device for causing said fan means to be operating only when said valve member is in a certain open condition thereof to comprise an electrical switch means carried by said housing means, forming said switch means to be adapted to cause said fan means to be operating only when said switch means is actuated to a certain condition thereof, and forming said temperature sensing means to have means operatively interconnected with said switch means to actuate said switch means to said certain condition thereof only when said temperature sensing means is causing said valve member to be in said certain open condition thereof.
Claim 29
Dependent Claim 45 words
A method of making a system as set forth in claim 20 and including the step of forming said means of said temperature sensing means that is operatively interconnected to said switch means to comprise a lever that is pivotally mounted to said housing means.
Claim 30
Dependent Claim 71 words
A method of making a system as set forth in claim 21 and including the steps of forming said switch means to have an axially movable plunger means which when moved a certain amount actuates said switch means, and forming said lever to have an abutment means that is adapted to be in engagement with said plunger means whereby said plunger means is adapted to move in unison with said lever.
Claim 31
Dependent Claim 30 words
A method of making a system as set forth in claim 22 and including a the step of forming said switch means to be adjustably mounted to said housing means.
Claim 32
Dependent Claim 45 words
A method of making a system as set forth in claim 23 and including the steps of forming said housing means to have an exterior surface means, and forming said switch means to be slideably mounted on said exterior surface means of said housing means.

References Cited (Backward Citations)

US1828016A Cited
US3004484A Cited
US3288370A Cited
US3917433A Cited
US4276754A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-04-10 1992-10-10 1993-04-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-04-10 1996-10-10 1997-04-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-04-10 2000-10-10 2001-04-11 $7700.00 Window Closed / Lapsed

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