US3611906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating system and control therefor
Assignee: Robertshaw US Holding Corp
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Filing: 1969-07-24
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Granted: 1971-10-12
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Expires: 1989-07-24
Abstract
Abstract Dampers in the air inlet of a ventilation system for a relatively closed room or building are adjustably positioned by a reversible electric motor controlled so that although the velocity at which air is exhausted from the building may vary, the dampers regulate the inflow of air to provide a substantially constant pressure differential between the interior and exterior of the building.
Inventors
- 👤 Jerome L Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:32
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/208; A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0064; F; F24; F24F; F24F7/00; F24F7/007
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A building having a ventilation system comprising means forming a ventilating air inlet and distributing duct and an air exhaust outlet for said building, means forcing air into said distributing duct and out of said exhaust outlet, first control means for varying the rate of airflow through said ventilating system, and Second control means for varying the rate of flow through said ventilating system, said first means being responsive to a change in the air pressure differential between the interior and exterior of said building from a given differential to vary said rate of flow.
Claim 2
Dependent Claim
95 words
A building having a ventilation system comprising means forming a ventilating air inlet and distributing duct and an air exhaust outlet for said building, means forcing air into said distributing duct and out of said exhaust outlet, first control means for varying the rate of airflow through said ventilating system, and Second control means for varying the rate of flow through said ventilating system, said first means being responsive to a change in the air pressure differential between the interior and exterior of said building from a given differential to vary said rate of flow.
Claim 3
Dependent Claim
44 words
A building as defined in claim 1 further characterized by said first means being responsive to an increase in said air pressure differential to increase said rate of airflow and responsive to a decrease in said air differential to decrease said rate of airflow.
Claim 4
Dependent Claim
36 words
A building as defined in claim 1 further characterized by said second means being responsive to increases and decreases in temperature from a given value to increase and decrease, respectively, the rate of flow of air.
Claim 5
Dependent Claim
31 words
A building as defined in claim 1 in which said first means comprises variable dampers in said ventilating system and said second means comprises an air blower in said ventilating system.
Claim 6
Dependent Claim
57 words
In a ventilating system as defined in claim 1 further characterized by said first control means comprising an air passage between the interior and exterior of said building and having a relatively fixed airflow opening therethrough, and means in the last mentioned passage responsive to changes in the rate of flow of air through the last-mentioned passage.
Claim 7
Dependent Claim
103 words
In a ventilating system for a building and comprising means to vary the rate of air exiting said building including duct means forming an air passage from the outside to the inside of said building, damper means operative to control the flow of air through said duct means, and means to control operation of said damper means comprising means forming a second air passage between the interior and exterior of the building having a relatively fixed airflow opening, and means including an element in said second passage responding to changes in the rate of flow of air therethrough for controlling said damper means.
Claim 8
Dependent Claim
103 words
In a ventilating system for a building and comprising means to vary the rate of air exiting said building including duct means forming an air passage from the outside to the inside of said building, damper means operative to control the flow of air through said duct means, and means to control operation of said damper means comprising means forming a second air passage between the interior and exterior of the building having a relatively fixed airflow opening, and means including an element in said second passage responding to changes in the rate of flow of air therethrough for controlling said damper means.
Claim 9
Dependent Claim
30 words
In a ventilating system as defined in claim 6 further characterized by said means to control the rate of flow of air comprising adjustable damper means in said duct means.
Claim 10
Dependent Claim
59 words
In a ventilating system as defined in claim 6 further characterized by said element of the last-mentioned means including an electric resistor in said second passage, a second resistor like the first resistor and shielded from the passage of air, and means responsive to differences in resistance of said two resistors for controlling the position of said damper means.
References Cited (Backward Citations)
US3211075A
Cited
US3352225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |