Patent US3610522A successfully refreshed from Google Patents.
US3610522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-conditioning system
Assignee: Krueger Manufacturing Co Inc
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Filing: 1969-01-24
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Granted: 1971-10-05
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Expires: 1989-01-24
Abstract
Abstract An air-conditioning system including a means for mixing primary air with recirculated secondary air. Primary air is passed through a plurality of nozzles to form a primary airstream for inducing the flow of secondary air into the stream. The secondary air enters the stream through dampers which may be positioned in accordance with the temperature requirements of the room receiving the mixed air. A primary air passageway by passing the nozzles is provided and also includes a bypass damper. A directacting thermostat senses the temperature of the room and provides pneumatic input to a pneumatic motor coupled to the dampers at the input of the secondary air. A static pressure-sensitive regulating element senses the static pressure at the exit. A second motor operates the bypass damper to admit more or less primary air to regulate the volume rate of air being supplied to the room.
Inventors
- 👤 Richard D Tutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:49
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/04; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/75; F24F13/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
195 words
In an air-conditioning system having a source of primary air under constant pressure and having means for collecting and storing secondary air for recirculation, the improvement comprising: a mixing box having an outlet; a nozzle mounted in said box and connected to said source of primary air for increasing the velocity of said primary air; an induction port in said box positioned adjacent said nozzle and communicating with a source of secondary air for inducing the flow of secondary air into the box and into a stream of primary air emanating from said nozzle; an induction port damper for restricting the flow of secondary air into said box; means defining a bypass passageway in said box connected to said source of primary air and bypassing said nozzle; a bypass damper for restricting the flow of primary air in said bypass; means responsive to the temperature of a selected location for positioning said induction port damper to control the flow of secondary air into said box; means responsive to the static pressure at the outlet of said box for positioning said bypass damper to provide a constant total volume rate of flow in said box outlet.
Claim 2
Dependent Claim
195 words
In an air-conditioning system having a source of primary air under constant pressure and having means for collecting and storing secondary air for recirculation, the improvement comprising: a mixing box having an outlet; a nozzle mounted in said box and connected to said source of primary air for increasing the velocity of said primary air; an induction port in said box positioned adjacent said nozzle and communicating with a source of secondary air for inducing the flow of secondary air into the box and into a stream of primary air emanating from said nozzle; an induction port damper for restricting the flow of secondary air into said box; means defining a bypass passageway in said box connected to said source of primary air and bypassing said nozzle; a bypass damper for restricting the flow of primary air in said bypass; means responsive to the temperature of a selected location for positioning said induction port damper to control the flow of secondary air into said box; means responsive to the static pressure at the outlet of said box for positioning said bypass damper to provide a constant total volume rate of flow in said box outlet.
Claim 3
Dependent Claim
40 words
The combination set forth in claim 1, wherein said means responsive to the temperature includes: a thermostat; a motor connected to said induction port damper for receiving energy from said thermostat and altering the position of said induction port dampers.
Claim 4
Dependent Claim
23 words
The combination set forth in claim 2, wherein said thermostat is a direct-acting pneumatic thermostat and wherein said motor is a pneumatic motor.
Claim 5
Dependent Claim
46 words
The combination set forth in claim 2, wherein said means responsive to the static pressure includes a static pressure sensor positioned at the outlet of said mixing box connected to a static pressure controller for regulating energy supplied to a motor connected to the bypass damper.
Claim 6
Dependent Claim
14 words
The combination set forth in claim 4, wherein said motor is a pneumatic motor.
Claim 7
Dependent Claim
186 words
Apparatus for use in an air-conditioning system, comprising: a mixing box having an inlet and an outlet for mounting in a plenum containing secondary air; a plurality of nozzles mounted in said box and connected to said mixing box inlet; a plurality of induction ports in said box positioned adjacent said nozzles, said induction ports opening to the exterior of said mixing box for admitting secondary air into a stream of primary air emanating from said nozzles; a plurality of induction port dampers for restricting the flow of secondary air into said box; a bypass passageway extending from said box inlet around said nozzles for admitting primary air to said box bypassing said nozzles; a bypass damper mounted in said passageway for restricting the flow of primary air in said bypass; means responsive to the temperature of a selected location for positioning said induction port dampers to control the flow of secondary air into said box; means responsive to the static pressure at the outlet of said box for positioning said bypass damper to provide a constant total volume rate of flow at said box outlet.
Claim 8
Dependent Claim
186 words
Apparatus for use in an air-conditioning system, comprising: a mixing box having an inlet and an outlet for mounting in a plenum containing secondary air; a plurality of nozzles mounted in said box and connected to said mixing box inlet; a plurality of induction ports in said box positioned adjacent said nozzles, said induction ports opening to the exterior of said mixing box for admitting secondary air into a stream of primary air emanating from said nozzles; a plurality of induction port dampers for restricting the flow of secondary air into said box; a bypass passageway extending from said box inlet around said nozzles for admitting primary air to said box bypassing said nozzles; a bypass damper mounted in said passageway for restricting the flow of primary air in said bypass; means responsive to the temperature of a selected location for positioning said induction port dampers to control the flow of secondary air into said box; means responsive to the static pressure at the outlet of said box for positioning said bypass damper to provide a constant total volume rate of flow at said box outlet.
Claim 9
Dependent Claim
40 words
The combination set forth in claim 6, wherein said means responsive to the temperature includes: a thermostat; a motor connected to said induction port damper for receiving energy from said thermostat and altering the position of said induction port dampers.
Claim 10
Dependent Claim
23 words
The combination set forth in claim 7, wherein said thermostat is a direct-acting pneumatic thermostat and wherein said motor is a pneumatic motor.
Claim 11
Dependent Claim
46 words
The combination set forth in claim 7, wherein said means responsive to the static pressure includes a static pressure sensor positioned at the outlet of said mixing box connected to a static pressure controller for regulating energy supplied to a motor connected to the bypass damper.
Claim 12
Dependent Claim
14 words
The combination set forth in claim 9, wherein said motor is a pneumatic motor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |