US3796367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve for use in an air distribution unit
Assignee: Carrier Corp
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Filing: 1972-10-02
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Granted: 1974-03-12
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Expires: 1992-10-02
Abstract
Abstract A control valve for use in an air distribution unit for discharging conditioned air into an area to be treated, including a variable volume control chamber for regulating the volume of conditioned air supplied to the area. The control valve regulates the operation of the variable volume control chamber to maintain a substantially constant discharge of conditioned air into the area irrespective of changes in supply air pressure. The control valve includes first and second variable orifices in series with each other. The size of the second orifice is varied so a predetermined ratio between the area of the first orifice and the area of the second orifice is obtained so a desired control pressure may be communicated from the control valve to the variable volume control chamber of the distribution unit.
Inventors
- 👤 E Rifkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:07
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/02; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/75
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
In combination with a control valve for use in an air distributing unit having a control chamber, the control valve including a first chamber and a second chamber therein, pressure relief means associated with the first chamber to prevent flow of control air therein below a desired pressure, and a duct communicating the control valve with the air distributing unit control chamber, the improvement which comprises: first variable orifice means disposed between the first and second chambers; second orifice means in series with said first variable orifice means; and adjustable means associated with said second orifice means to vary the size thereof to provide a predetermined ratio between the area of said first orifice means and the area of said second orifice means to thereby obtain a desired control pressure in said duct communicating said control valve and said air distributing unit control chamber.
Claim 2
Dependent Claim
144 words
In combination with a control valve for use in an air distributing unit having a control chamber, the control valve including a first chamber and a second chamber therein, pressure relief means associated with the first chamber to prevent flow of control air therein below a desired pressure, and a duct communicating the control valve with the air distributing unit control chamber, the improvement which comprises: first variable orifice means disposed between the first and second chambers; second orifice means in series with said first variable orifice means; and adjustable means associated with said second orifice means to vary the size thereof to provide a predetermined ratio between the area of said first orifice means and the area of said second orifice means to thereby obtain a desired control pressure in said duct communicating said control valve and said air distributing unit control chamber.
Claim 3
Dependent Claim
257 words
In combination with an air distributing unit for discharging conditioned air into an area to be conditioned, a plenum chamber, said plenum chamber being adapted to be placed in communication with the source of conditioned air at a desired pressure, means defining an outlet from said plenum chamber into the area to be treated, and a variable volume control chamber for regulating the quantity of conditioned air supplied to the area to be treated through the outlet, the improvement which comprises: a control valve having a first chamber and a second chamber therein, the first chamber communicating with the plenum chamber and the second chamber communicating with the variable volume control chamber; pressure relief means associated with the first chamber to prevent flow of air therein below a desired minimum pressure; first variable orifice means disposed between the first and second chambers; second orifice means in series with said first variable orifice means for exhausting control air from said second chamber; a control air pressure duct disposed between said first and second orifice means means to communicate the pressure in the second chamber to the variable volume control chamber to regulate the discharge of air from the air distribution unit; and adjustable means associated with said second orifice means to vary the size thereof to provide a predetermined ratio between the area of said first orifice means and the area of said second orifice means to thereby obtain a desired control pressure in said control air pressure duct for a given value of conditioned air supply pressure.
Claim 4
Dependent Claim
257 words
In combination with an air distributing unit for discharging conditioned air into an area to be conditioned, a plenum chamber, said plenum chamber being adapted to be placed in communication with the source of conditioned air at a desired pressure, means defining an outlet from said plenum chamber into the area to be treated, and a variable volume control chamber for regulating the quantity of conditioned air supplied to the area to be treated through the outlet, the improvement which comprises: a control valve having a first chamber and a second chamber therein, the first chamber communicating with the plenum chamber and the second chamber communicating with the variable volume control chamber; pressure relief means associated with the first chamber to prevent flow of air therein below a desired minimum pressure; first variable orifice means disposed between the first and second chambers; second orifice means in series with said first variable orifice means for exhausting control air from said second chamber; a control air pressure duct disposed between said first and second orifice means means to communicate the pressure in the second chamber to the variable volume control chamber to regulate the discharge of air from the air distribution unit; and adjustable means associated with said second orifice means to vary the size thereof to provide a predetermined ratio between the area of said first orifice means and the area of said second orifice means to thereby obtain a desired control pressure in said control air pressure duct for a given value of conditioned air supply pressure.
Claim 5
Independent Claim
214 words
The method of calibrating a control valve of a type employed with an air distributing unit having a control chamber, the control valve beng operable to maintain a substantially constant discharge of conditioned air from the unit, regardless of variations in the conditioned air supply pressure, a portion of the control valve having a flow label affixed thereon, comprising the steps of: a. connecting the control valve inlet to a soUrce of supply air, the pressure thereof being of a known magnitude; b. adjusting the position of a portion of the control valve so it is aligned with a desired indicium on the flow label to thereby adjust the opening of a first variable orifice; c. supplying the known magnitude pressure signal through the first variable orifice into an intermediate chamber of the control valve; c. regulating the bleeding of air from the intermediate chamber so a desired pressure is obtained therein, said pressure being related to the known supply air pressure; and e. communicating the intermediate chamber with the distributing unit control chamber so a pressure signal indicative of the pressure in the intermediate chamber is supplied to the control chamber, said pressure signal being operable to regulate the control chamber so a desired quantity of conditioned air is discharged from the unit.
Claim 6
Independent Claim
214 words
The method of calibrating a control valve of a type employed with an air distributing unit having a control chamber, the control valve beng operable to maintain a substantially constant discharge of conditioned air from the unit, regardless of variations in the conditioned air supply pressure, a portion of the control valve having a flow label affixed thereon, comprising the steps of: a. connecting the control valve inlet to a soUrce of supply air, the pressure thereof being of a known magnitude; b. adjusting the position of a portion of the control valve so it is aligned with a desired indicium on the flow label to thereby adjust the opening of a first variable orifice; c. supplying the known magnitude pressure signal through the first variable orifice into an intermediate chamber of the control valve; c. regulating the bleeding of air from the intermediate chamber so a desired pressure is obtained therein, said pressure being related to the known supply air pressure; and e. communicating the intermediate chamber with the distributing unit control chamber so a pressure signal indicative of the pressure in the intermediate chamber is supplied to the control chamber, said pressure signal being operable to regulate the control chamber so a desired quantity of conditioned air is discharged from the unit.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |