Patent US4898087A successfully refreshed from Google Patents.
US4898087A
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Laminarizer
Assignee: HEINRICH NICKEL SIEGSTRASSE 28-34 5240 BETZDORF FED REP OF GERMANY GmbH
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Filing: 1989-03-17
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Granted: 1990-02-06
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Expires: 2009-03-17
Abstract
Abstract A laminarizer or arrangement for producing laminar flow, particularly for ceilings and walls of clean rooms or the link formed of filter modules. The laminarizer is suspended or held spaced from a cover supporting mechanical filters. The laminarizer is composed of rectangular frames with fabric sheets stretched onto the rectangular frames. The side members of the rectangular frames are hollow sections or angle sections of triangular cross-section. The fabric sheets rest against and are aligned by the surfaces of the side members facing the rooms are only as narrow and/or rounded-off alignment contacts for the fabric sheets, while the fastening of the fabric sheets is provided at the outer surfaces of the side members extending perpendicularly to the plane of the frame and/or on the rear surfaces of the side members extending in the plane of the frame.
Inventors
- 👤 Klaus Fitzner
- 👤 Walter Betz
- 👤 Uwe Plitt
- 👤 Wolfgang Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:04
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/16; F24F3/167; E; E04; E04B; E04B9/00; E04B9/02; E04B9/04; E04B2009/0492
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
153 words
In a laminarizer for producing laminar flow for ceilings and walls of clean rooms formed of filter modules, the laminarizer being suspended or held spaced from a cover supporting mechanical filters, the laminarizer including rectangular frames with fabric sheets being stretched onto each rectangular frame, each rectangular frame defining a plane and having side members, each side member being a section of triangular cross-section, the side members each having a surface facing the room, an outer surface extending perpendicularly to the plane of the frame, and a rear surface extending in the plane of the rectangular frame, the fabric sheets resting against and being aligned by the surfaces of the side members facing the room, the improvement comprising the surfaces of the side members facing the room defining narrow alignment contact means for the fabric sheets, the fabric sheets being fastened to the side members at the outer surfaces of the side members.
Claim 2
Dependent Claim
153 words
In a laminarizer for producing laminar flow for ceilings and walls of clean rooms formed of filter modules, the laminarizer being suspended or held spaced from a cover supporting mechanical filters, the laminarizer including rectangular frames with fabric sheets being stretched onto each rectangular frame, each rectangular frame defining a plane and having side members, each side member being a section of triangular cross-section, the side members each having a surface facing the room, an outer surface extending perpendicularly to the plane of the frame, and a rear surface extending in the plane of the rectangular frame, the fabric sheets resting against and being aligned by the surfaces of the side members facing the room, the improvement comprising the surfaces of the side members facing the room defining narrow alignment contact means for the fabric sheets, the fabric sheets being fastened to the side members at the outer surfaces of the side members.
Claim 3
Dependent Claim
153 words
In a laminarizer for producing laminar flow for ceilings and walls of clean rooms formed of filter modules, the laminarizer being suspended or held spaced from a cover supporting mechanical filters, the laminarizer including rectangular frames with fabric sheets being stretched onto each rectangular frame, each rectangular frame defining a plane and having side members, each side member being a section of triangular cross-section, the side members each having a surface facing the room, an outer surface extending perpendicularly to the plane of the frame, and a rear surface extending in the plane of the rectangular frame, the fabric sheets resting against and being aligned by the surfaces of the side members facing the room, the improvement comprising the surfaces of the side members facing the room defining narrow alignment contact means for the fabric sheets, the fabric sheets being fastened to the side members at the rear surfaces of the side members.
Claim 4
Dependent Claim
153 words
In a laminarizer for producing laminar flow for ceilings and walls of clean rooms formed of filter modules, the laminarizer being suspended or held spaced from a cover supporting mechanical filters, the laminarizer including rectangular frames with fabric sheets being stretched onto each rectangular frame, each rectangular frame defining a plane and having side members, each side member being a section of triangular cross-section, the side members each having a surface facing the room, an outer surface extending perpendicularly to the plane of the frame, and a rear surface extending in the plane of the rectangular frame, the fabric sheets resting against and being aligned by the surfaces of the side members facing the room, the improvement comprising the surfaces of the side members facing the room defining narrow alignment contact means for the fabric sheets, the fabric sheets being fastened to the side members at the rear surfaces of the side members.
Claim 5
Dependent Claim
26 words
The laminarizer according to claims 1 or 2, wherein the fabric sheets are fastened to the outer surfaces and the rear surfaces of the side members.
Claim 6
Dependent Claim
14 words
The laminarizer according to claims 1 or 2, wherein the sections are hollow sections.
Claim 7
Dependent Claim
14 words
The laminarizer according to claims 1 or 2, wherein the sections are angle sections.
Claim 8
Dependent Claim
16 words
The laminarizer according to claims 1 or 2, wherein the alignment contact means are rounded off.
Claim 9
Dependent Claim
20 words
The laminarizer according to claims 1 or 2, wherein the fabric sheets are connected by means of a glued connection.
Claim 10
Dependent Claim
14 words
The laminarizer according to claim 7, wherein the glued connection is a surface-to-surface connection.
Claim 11
Dependent Claim
44 words
The laminarizer according to claims 1 or 2, wherein each side member defines a longitudinal indentation with an opening, an adhesive strand being placed in each longitudinal indentation, the adhesive strand being connected to the fabric sheet at the opening of the longitudinal indentation.
Claim 12
Dependent Claim
15 words
The laminarizer according to claim 9, wherein the adhesive strand is of a fusion adhesive.
Claim 13
Dependent Claim
14 words
The laminarizer according to claim 9, wherein the longitudinal indentation is an undercut groove.
Claim 14
Dependent Claim
36 words
The laminarizer according to claims 1 or 2, wherein each side member has a longitudinal indentation, the fabric sheet being releasably fastened by means of a rim profile or sealing profile placed in the longitudinal indentation.
Claim 15
Dependent Claim
14 words
The laminarizer according to claim 12, wherein the longitudinal indentation is an undercut groove.
Claim 16
Dependent Claim
32 words
The laminarizer according to claim 12, wherein each rim profile includes a sealing lip formed integrally with the rim profile, the sealing lip projecting from the outer surface of the side member.
Claim 17
Dependent Claim
60 words
The laminarizer according to claims 1 or 2, wherein the fabric sheets have border edges, each fabric sheet being fastened to the side member at a distance from the border edge of the sheet, so that an unfastened border strip of the fabric sheet is formed, the unfastened border strip extending web-like from the outer surface of the side member.
Claim 18
Dependent Claim
43 words
The laminarizer according to claim 15, wherein the web-like border strip of the fabric sheet projects into a gap between adjacent rectangular frames, the web-like border strips contacting each other within the gap, so that a defined permeability is produced in the gap.
Claim 19
Dependent Claim
60 words
The laminarizer according to claims 1 or 2, wherein the fabric sheets have border edges, each fabric sheet being fastened to the side member at a distance from the border edge of the sheet, so that an unfastened border strip of the fabric sheet is formed, the unfastened border strip extending arc-shaped from the outer surface of the side member.
Claim 20
Dependent Claim
43 words
The laminarizer according to claim 17, wherein the web-like border strip of the fabric sheet projects into a gap between adjacent rectangular frames, the arc-shaped border strips contacting each other within the gap, so that a defined permeability is produced in the gap.
Claim 21
Dependent Claim
51 words
The laminarizer according to claims 1 or 2, wherein the fabric sheet is attached to the rectangular frame such that the fabric sheet sags in an arch-like shape from the plane of the rectangular frame, the height of the arch of the fabric sheet being approximately between 20 and 30 mm.
Claim 22
Dependent Claim
59 words
The laminarizer according to claims 1 or 2, wherein the rectangular frame side members are connected to each other by means of corner angles, the corner angles having legs which are angularly spaced from each other by between 90° and 91°, the side members being connected to each other so as to be under convex, outwardly arched elastic pretensioning.
Claim 23
Dependent Claim
17 words
The laminarizer according to claim 20, wherein the legs are angularly spaced from between 90°10' and 90°20'.
Claim 24
Dependent Claim
25 words
The laminarizer according to claim 20, wherein the legs of the corner angles are held together with the side members in a press fit connection.
Claim 25
Dependent Claim
48 words
The laminarizer according to claim 20, wherein the corner angles each have in an outer corner region thereof a wall portion which extends parallel to the plane of the rectangular frame, each wall portion being provided with a quarter-circle shaped intended breaking point defining a limited break-out area.
Claim 26
Dependent Claim
81 words
The laminarizer according to claims 1 or 2, the laminarizer being fastened to a ceiling by means of rods, a support plate being attached to the rods, the support plate effecting releasable engagement of adjacent corners of the rectangular frames, the support plate having an engagement means for a corner each of the four adjacent rectangular frames, the engagement means being provided on the support plate so as to be slidable in longitudinal direction and transverse direction by a limited extent.
Claim 27
Dependent Claim
42 words
The laminarizer according to claim 24, wherein each engagement means includes a nut movable in a cage, the side members of the rectangular frame being connected by means of corner angles, screws extending through the corner angles being screwed into the nuts.
Claim 28
Dependent Claim
62 words
The laminarizer according to claim 24, wherein carrying plates for band-type screens formed of sheet metal sections are attached to the rods, the screens receiving cover plates by means of which the frames of the mechanical filters for the filter modules can be covered, the screens including joint being sealed by a sheet metal sheet glued to the bottom of the screen.
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |