Patent US3881402A successfully refreshed from Google Patents.
US3881402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distributing ventilating medium within spaces
Assignee: Svenska Flaktfabriken AB
•
Filing: 1973-05-04
•
Granted: 1975-05-06
•
Expires: 1993-05-04
Abstract
Abstract A method for ventilating spacious public rooms, workshops, industrial halls and the like spaces wherein ventilating medium is supplied in large quantity at low velocity and is circulated within the space by high-velocity jets positioned in series and preferably adjustable to circulate the ventilating medium into the areas of the space which require ventilation. The jets inject only a small quantity of medium which may be separately conditioned or fed from a separate supply. The method is particularly effective for obtaining a desirable circulation of the ventilating medium in areas which are partially screened from main supply by a column or other barrier.
Inventors
- 👤 Birger Larkfeldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:37
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
A method for ventilating spacious public rooms, workshop spaces, industrial halls, and like spaces, in which the ventilating medium within the space is conveyed and distributed to selected areas within the space; comprising the steps of supplying ventilating medium in the required amount at low velocity, directing the ventilating medium into a controlled circulating path by means of a plurality of ejectors positioned in said path; supplying each ejector with medium to emit a jet of high velocity, the amount of which high velocity medium is small with respect to the ventilating medium; and locating said ejectors within said space in said circulating path in a series so that the second ejector of the series is disposed within the action range of the first ejector in the series.
Claim 2
Independent Claim
128 words
A method for ventilating spacious public rooms, workshop spaces, industrial halls, and like spaces, in which the ventilating medium within the space is conveyed and distributed to selected areas within the space; comprising the steps of supplying ventilating medium in the required amount at low velocity, directing the ventilating medium into a controlled circulating path by means of a plurality of ejectors positioned in said path; supplying each ejector with medium to emit a jet of high velocity, the amount of which high velocity medium is small with respect to the ventilating medium; and locating said ejectors within said space in said circulating path in a series so that the second ejector of the series is disposed within the action range of the first ejector in the series.
Claim 3
Dependent Claim
64 words
A method according to claim 1 in which the space has a restricted dwelling zone in one part of the space and another zone in another part of the space, and wherein said circulating path for the ventilating medium is located by said ejectors within said dwelling zone in said one part of the space and outside of the other zone of the space.
Claim 4
Independent Claim
139 words
A method for ventilating spacious public rooms, workshop spaces, industrial halls, and like spaces, in which the ventilating medium within the space is conveyed and distributed to selected areas within the space; comprising the steps of supplying fresh ventilating medium to said space in an amount corresponding to the requirement of the space at low veloCity, directing the ventilating air into a controlled circulating path by means of a plurality of ejectors positioned in said path such that the fresh ventilating medium flows into said circulating path; and supplying each ejector with medium to emit a jet of medium at high velocity, the amount of which medium is small with respect to the amount ventilating medium, but the velocity of which is high enough to provide an impulse entraining said low-velocity medium and directing it in a controlled flow.
Claim 5
Independent Claim
139 words
A method for ventilating spacious public rooms, workshop spaces, industrial halls, and like spaces, in which the ventilating medium within the space is conveyed and distributed to selected areas within the space; comprising the steps of supplying fresh ventilating medium to said space in an amount corresponding to the requirement of the space at low veloCity, directing the ventilating air into a controlled circulating path by means of a plurality of ejectors positioned in said path such that the fresh ventilating medium flows into said circulating path; and supplying each ejector with medium to emit a jet of medium at high velocity, the amount of which medium is small with respect to the amount ventilating medium, but the velocity of which is high enough to provide an impulse entraining said low-velocity medium and directing it in a controlled flow.
Claim 6
Dependent Claim
25 words
A method according to claim 3 including the step of separately supplying air to said ejectors for said jets, and separately conditioning said supplied air.
Claim 7
Dependent Claim
23 words
A method according to claim 4 including the step of separately conditioning the fresh ventilating medium prior to supplying it to said space.
Claim 8
Independent Claim
171 words
A method for ventilating a space wherein said space has partial barriers therein partially screening off a portion of said space, in which the ventilating air within the space is conveyed and distributed to selected areas within the space; comprising the steps of directing the ventilating air into a controlled circulating path by means of a plurality of ejectors positioned in said path; supplying each ejector with air to emit a jet of air at high velocity, the amount of which air is small with respect to the ventilating air; and locating said ejectors within said space in said circulating path in a series so that the second ejector of the series is disposed within the action range of the first ejector in the series, including the step of supplying fresh ventilating medium to said space at one side of said partial barriers and positioning said ejectors at the other side of said partial barriers to provide a circulating path which deflects and distributes the ventilating medium in the screened-off portion.
Claim 9
Independent Claim
171 words
A method for ventilating a space wherein said space has partial barriers therein partially screening off a portion of said space, in which the ventilating air within the space is conveyed and distributed to selected areas within the space; comprising the steps of directing the ventilating air into a controlled circulating path by means of a plurality of ejectors positioned in said path; supplying each ejector with air to emit a jet of air at high velocity, the amount of which air is small with respect to the ventilating air; and locating said ejectors within said space in said circulating path in a series so that the second ejector of the series is disposed within the action range of the first ejector in the series, including the step of supplying fresh ventilating medium to said space at one side of said partial barriers and positioning said ejectors at the other side of said partial barriers to provide a circulating path which deflects and distributes the ventilating medium in the screened-off portion.
Claim 10
Independent Claim
139 words
A method for ventilating a space in which the ventilating air within the space is conveyed and distributed to selected areas within the space; comprising the steps of directing the ventilating air into a controlled circulating path by means of a plurality of ejectors positioned in said path; supplying each ejector with air to emit a jet of air at high velocity, the amount of which air is small with respect to the ventilating air; and locating said ejectors within said space in said circulating path in a series so that the second ejector of the series is disposed within the action range of the first ejector in the series, including the step of adjusting the positions of the ejectors during the ventilating operation to change the velocity of the jet and thereby alter the circulating path created thereby.
Claim 11
Independent Claim
139 words
A method for ventilating a space in which the ventilating air within the space is conveyed and distributed to selected areas within the space; comprising the steps of directing the ventilating air into a controlled circulating path by means of a plurality of ejectors positioned in said path; supplying each ejector with air to emit a jet of air at high velocity, the amount of which air is small with respect to the ventilating air; and locating said ejectors within said space in said circulating path in a series so that the second ejector of the series is disposed within the action range of the first ejector in the series, including the step of adjusting the positions of the ejectors during the ventilating operation to change the velocity of the jet and thereby alter the circulating path created thereby.
Claim 12
Dependent Claim
105 words
A space adapted to being ventilated including means defining the boundaries of the space to be ventilated, means to admit ventilating medium into said space, and a series of ejectors mounted in said space at spaced intervals and each positioned to direct a jet of air having a high velocity of a given direction and a small quantity relative to the ventilating medium, said jets operable to create a circulating flow path of the ventilating medium in said space, said ejectors being adjustable to vary the velocity of the jet both by changing the direction of the jet and by varying the quantity flow therefrom.
Claim 13
Dependent Claim
105 words
A space adapted to being ventilated including means defining the boundaries of the space to be ventilated, means to admit ventilating medium into said space, and a series of ejectors mounted in said space at spaced intervals and each positioned to direct a jet of air having a high velocity of a given direction and a small quantity relative to the ventilating medium, said jets operable to create a circulating flow path of the ventilating medium in said space, said ejectors being adjustable to vary the velocity of the jet both by changing the direction of the jet and by varying the quantity flow therefrom.
Claim 14
Dependent Claim
41 words
A space according to claim 8 wherein said means to introduce ventilating medium into said space comprises a supply grill adjacent said boundary means and operable to inject ventilating medium into the space so as to flow into said circulating path.
References Cited (Backward Citations)
US1820779A
Cited
US3699871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |