Patent US4170930A successfully refreshed from Google Patents.
US4170930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screen for improving the environment of a workplace having a plurality of working areas
Assignee: Individual
•
Filing: 1977-12-08
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Granted: 1979-10-16
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Expires: 1997-12-08
Abstract
Abstract A screen for improving the environment of separate working areas in a working place having a plurality of such working areas, e.g. a factory floor, a workshop, an office or the like, is provided with a mechanism for connecting the screen to an air-supply line and exhibits at least one perforated side surface. The screen is hollow and accommodates a perforated supply and distributing pipe for fresh air. So as to evenly distribute the air, the pipe in a preferred embodiment has a number of nozzles which project into the path of the main-flow in the pipe and deflect uniform part flows therefrom in a direction substantially transversally of the direction of the main-flow and at substantially the same speed as the speed of the main-flow before the first nozzle. The screen may serve as a combined acoustic and air-supply screen which enables personnel to work close to the screen without being subjected to draughts.
Inventors
- 👤 Leif I. Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:26
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/068; F24F2013/0608
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
177 words
A screen having side surfaces for improving the environment of a workplace comprising: frame means for defining a generally rectangular-shaped frame; support means for detachably supporting said frame on a support surface; a perforated sheet connected to said frame to define one side surface of said screen; a second sheet spaced from said perforated sheet and connected to said frame to define the other side surface of said screen, said sheets cooperating to define an enclosed space within said screen; connection means associated with a portion of said frame adapted for connecting said enclosed spaced with an air-supplying line; and said screen further comprising a perforated supply and distributing conduit for fresh air connected to said connection means and disposed within the enclosed space; deflection means comprising the supply and distributing conduit for fresh air having a number of radially disposed nozzles which project into the path of the flow of air and deflecting a number of equal and uniformly distributed part-flows departing in a direction substantially transverally of the direction of the main-flow in said conduit.
Claim 2
Dependent Claim
177 words
A screen having side surfaces for improving the environment of a workplace comprising: frame means for defining a generally rectangular-shaped frame; support means for detachably supporting said frame on a support surface; a perforated sheet connected to said frame to define one side surface of said screen; a second sheet spaced from said perforated sheet and connected to said frame to define the other side surface of said screen, said sheets cooperating to define an enclosed space within said screen; connection means associated with a portion of said frame adapted for connecting said enclosed spaced with an air-supplying line; and said screen further comprising a perforated supply and distributing conduit for fresh air connected to said connection means and disposed within the enclosed space; deflection means comprising the supply and distributing conduit for fresh air having a number of radially disposed nozzles which project into the path of the flow of air and deflecting a number of equal and uniformly distributed part-flows departing in a direction substantially transverally of the direction of the main-flow in said conduit.
Claim 3
Dependent Claim
33 words
A screen as claimed in claim 1, wherein the nozzles are designed in such manner that the speed of the part-flows substantially corresponds to the speed of the main-flow before the first nozzle.
Claim 4
Dependent Claim
27 words
A nozzle as claimed in claim 2 wherein, each nozzle has an inclined inlet and a means for mounting the nozzle in the supply and distributing pipe.
Claim 5
Dependent Claim
42 words
A screen according to claim 3, wherein said nozzles comprise internal partition walls having a shorter axial length than the greatest length of the nozzle, said partition walls dividing the nozzle into parts or chambers arranged to accommodate substantially equally large part-flows.
Claim 6
Dependent Claim
23 words
A screen according to claim 4, wherein each nozzle comprises three partition walls which form an angle of approximately 120° with each other.
Claim 7
Dependent Claim
30 words
A screen according to claim 5, wherein the nozzle height of the partition walls is approximately one third the length or height of the nozzle inlet projecting into the flow.
Claim 8
Dependent Claim
20 words
A screen according to claim 1, further comprising valve means for regulating the amount of air supplied to the screen.
Claim 9
Dependent Claim
14 words
A screen according to claim 1, wherein the second sheet is a perforated sheet.
Claim 10
Dependent Claim
16 words
A screen according to claim 1, further comprising sound absorbing material disposed in said enclosed space.
Claim 11
Dependent Claim
23 words
A screen according to claim 9, wherein the sound absorbing material is disposed adjacent the second sheet and substantially covers the second sheet.
Claim 12
Dependent Claim
21 words
A screen according to claim 9, wherein said support means are adapted to support said frame in a substantially horizontal position.
Claim 13
Dependent Claim
31 words
A screen according to claim 9, wherein said support means are adapted to support said frame in a substantially vertical position and are freely movable with respect to the support surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |