US3926102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air injecting apparatus for air conditioners or the like
Assignee: Danfoss AS
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Filing: 1974-10-07
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Granted: 1975-12-16
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Expires: 1994-10-07
Abstract
Abstract The invention relates to an air conditioning system inlet assembly which has walls which form a chamber having an outlet opening. A pivotally mounted valve plate varies the size of the opening. The valve plate forms one lever arm of a fulcrumed lever and the second lever arm thereof is counterweighted. Weights on the second lever arm balance the biasing forces of pressurized air in the chamber which tend to move the valve plate in closing direction. An increase in the total volume of air supplied per unit time results in a larger valve opening to counter the effects of unpleasant drafts which would otherwise occur.
Inventors
- 👤 Lepeleire Guido Amandus De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:33
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/745; F24F13/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
An air conditioning system air inlet assembly comprising an air flow duct, a damper forming a variable outlet orifice for said duct, said damper being mounted for pivotal movement relative to a horizontally extending axis, said damper being movable in an opening direction by pressurized upstream air in said duct, mechanical means biasing said damper in a closing direction, said mechanical means having an angular relationship with said damper to vary the size of said orifice in accordance with the pressure of said pressurized air to maintain a constant air velocity at said orifice, said duct extending vertically, said damper constituting a first lever arm relative to said axis, said mechanical means including a second lever arm extending in a generally horizontal direction.
Claim 2
Dependent Claim
123 words
An air conditioning system air inlet assembly comprising an air flow duct, a damper forming a variable outlet orifice for said duct, said damper being mounted for pivotal movement relative to a horizontally extending axis, said damper being movable in an opening direction by pressurized upstream air in said duct, mechanical means biasing said damper in a closing direction, said mechanical means having an angular relationship with said damper to vary the size of said orifice in accordance with the pressure of said pressurized air to maintain a constant air velocity at said orifice, said duct extending vertically, said damper constituting a first lever arm relative to said axis, said mechanical means including a second lever arm extending in a generally horizontal direction.
Claim 3
Dependent Claim
47 words
An air inlet assembly according to claim 1 wherein said second lever arm has weight means associated therewith, said second lever arm having an attitude angle relative to said first lever arm so that said damper forms an opening proportional to the air pressure of said chamber.
Claim 4
Dependent Claim
21 words
An air inlet assembly according to claim 1 wherein said second lever arm is inclined obliquely downwardly in its at-rest position.
Claim 5
Dependent Claim
32 words
An air inlet aseembly according to claim 1 wherein said damper has a flat part which extends generally vertically, and weight means being mounted on said first lever arm below said axis.
References Cited (Backward Citations)
US3095799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |