Patent US5218998A successfully refreshed from Google Patents.
US5218998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linearly adjustable
Assignee: ADVANCED TECHNOLOGY ENVIRONMENTAL CONTROL SYSTEMS LLC
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Filing: 1992-04-01
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Granted: 1993-06-15
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Expires: 2012-04-01
Abstract
Abstract A linearly adjustable fluid damper of the sliding plate adjustable orifice type damper system having a fixed flat plate with a plurality of specifically arranged trapezoidal shaped apertures therethrough, and a slideably adjustable flat plate also having a plurality of specifically arranged trapezoidal shaped apertures therethrough. The sliding plate is juxtaposed the fixed plate such that apertures of the sliding plate overlap apertures of the fixed plate, and aperture orientation of the sliding plate is reversed that of the orientation of the apertures on the fixed plate. The area of the resultant hexagonal composite orifice through both plates varies non-linearly from full open position to full closed position throughout movement of the sliding plate. The result is that fluid flow from zero fluid flow to maximum fluid flow through the resultant orifice is a straight line relationship with linear displacement of the sliding plate. Dampers comprising this configuration may thus be preset to predetermine openings in fluid flow operations to achieve desired results. Alternate embodiments of the invention include use of semi-cylindrical plates and cone shaped plates.
Inventors
- 👤 Gary M. Bakken
- 👤 Phillip E. Branham
- 👤 William R. Acorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:15
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86743; Y10T137/86751; Y10T137/86759
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
152 words
An improvement in sliding plate orifice dampers utilized in fluid handling systems, the sliding plate orifice dampers of the type having a fixed plate with an aperture therethrough and a sliding plate also having an aperture therethrough, the improvement comprising: a fixed plate having a trapezoidal shaped aperture therethrough; and a sliding plate also having a trapezoidal shaped aperture therethrough, said sliding plate moveable linearly relative to said fixed plate, said sliding plate juxtaposed said fixed plate such that said aperture of said sliding plate is in close proximity to and overlaps said aperture of said fixed plate to form a resultant composite orifice having six sides to pass fluid through both said fixed plate and said sliding plate, said sliding plate linear displacement having a straight line relationship characteristic to the volume of fluid flow through said orifice, said sliding plate slideably adjusted to selective a known volume of fluid flow.
Claim 2
Dependent Claim
152 words
An improvement in sliding plate orifice dampers utilized in fluid handling systems, the sliding plate orifice dampers of the type having a fixed plate with an aperture therethrough and a sliding plate also having an aperture therethrough, the improvement comprising: a fixed plate having a trapezoidal shaped aperture therethrough; and a sliding plate also having a trapezoidal shaped aperture therethrough, said sliding plate moveable linearly relative to said fixed plate, said sliding plate juxtaposed said fixed plate such that said aperture of said sliding plate is in close proximity to and overlaps said aperture of said fixed plate to form a resultant composite orifice having six sides to pass fluid through both said fixed plate and said sliding plate, said sliding plate linear displacement having a straight line relationship characteristic to the volume of fluid flow through said orifice, said sliding plate slideably adjusted to selective a known volume of fluid flow.
Claim 3
Dependent Claim
82 words
The improvement in sliding plate orifice dampers as defined in claim 1 wherein said trapezoidal shaped aperture in said fixed plate has an orientation relative to said fixed plate and said trapezoidal shaped aperture in said sliding plate also has an orientation relative to said sliding plate, said sliding plate slideably juxtaposed said fixed plate such that said orientation of said trapezoidal shaped aperture of said fixed plate is opposite to said orientation of said trapezoidal shaped aperture of said sliding plate.
Claim 4
Dependent Claim
72 words
The improvement in sliding plate orifice dampers as defined in claim 2 wherein each said trapezoidal shaped aperture of said fixed plate and of said sliding plate has a major base and a minor base, and a height between said major base and minor base, and each said trapezoidal shaped aperture of said fixed plate and of said sliding plate defines a center line bisecting said major base and said minor base.
Claim 5
Dependent Claim
61 words
The improvement in sliding plate orifice dampers as defined in claim 3 wherein said trapezoidal shaped aperture of said fixed plate defines an isosceles trapezoid and said trapezoidal shaped aperture of said sliding plate also defines an isosceles trapezoid, and said trapezoidal shaped aperture of said fixed plate is the same size as said trapezoidal shaped aperture of said sliding plate.
Claim 6
Dependent Claim
41 words
The improvement in sliding plate orifice dampers as defined in claim 4 wherein said center line of said fixed plate trapezoidal shaped aperture coincides with said center line of said sliding plate trapezoidal shaped aperture to form said resultant composite orifice.
Claim 7
Dependent Claim
76 words
The improvement in sliding plate orifice dampers as defined in claim 5 further including means to align said sliding plate to said fixed plate, said means to align maintaining said center line of said sliding plate trapezoidal aperture coincident with said center line of said fixed plate trapezoidal aperture as said sliding plate is moved relative to said fixed plate, and means to controllably adjust said position of said sliding plate relative to said fixed plate.
Claim 8
Dependent Claim
25 words
The improvement in sliding plate orifice dampers as defined in claim 6 wherein said fixed plate is planar, and said sliding plate is also planar.
Claim 9
Dependent Claim
25 words
The improvement in sliding plate orifice dampers as defined in claim 6 wherein said fixed plate is curved and said sliding plate is also curved.
Claim 10
Dependent Claim
25 words
The improvement in sliding plate orifice dampers as defined in claim 6 wherein said fixed plate is conical and said sliding plate is also conical.
Claim 11
Dependent Claim
45 words
The improvement in sliding plate orifice dampers as defined in claim 6 wherein each said trapezoidal shaped aperture in said fixed plate and in said sliding plate has two oppositely situated non-parallel, non-intersecting straight sides connecting each said respective major base to said minor base.
Claim 12
Dependent Claim
44 words
The improvement in sliding plate orifice dampers as defined in claim 6 wherein each said trapezoidal shaped aperture in said fixed plate and in said sliding plate has two oppositely situated non-intersecting curved lines connecting each said respective major base to said minor base.
Claim 13
Dependent Claim
174 words
An improvement in sliding plate orifice dampers utilized in fluid handling systems, the sliding plate orifice dampers of the type having a fixed plate with a plurality of apertures therethrough and a sliding plate also having a plurality of apertures therethrough, the improvement comprising: a fixed plate having a plurality of spaced apart trapezoidal shaped apertures therethrough; a sliding plate also having a plurality of spaced apart trapezoidal shaped apertures therethrough, said sliding plate moveable linearly relative to said fixed plate, said sliding plate juxtaposed said fixed plate such that one each of said plurality of apertures of said sliding plate overlaps one each of said plurality of apertures of said fixed plate to form a plurality of spaced apart resultant composite orifices each having six sides to pass fluid through both said fixed plate and said sliding plate, said sliding plate linear displacement having a straight line relationship characteristic to the volume of fluid flow through said plurality of orifices, said sliding plate slideably adjusted to select a known volume of fluid flow.
Claim 14
Dependent Claim
174 words
An improvement in sliding plate orifice dampers utilized in fluid handling systems, the sliding plate orifice dampers of the type having a fixed plate with a plurality of apertures therethrough and a sliding plate also having a plurality of apertures therethrough, the improvement comprising: a fixed plate having a plurality of spaced apart trapezoidal shaped apertures therethrough; a sliding plate also having a plurality of spaced apart trapezoidal shaped apertures therethrough, said sliding plate moveable linearly relative to said fixed plate, said sliding plate juxtaposed said fixed plate such that one each of said plurality of apertures of said sliding plate overlaps one each of said plurality of apertures of said fixed plate to form a plurality of spaced apart resultant composite orifices each having six sides to pass fluid through both said fixed plate and said sliding plate, said sliding plate linear displacement having a straight line relationship characteristic to the volume of fluid flow through said plurality of orifices, said sliding plate slideably adjusted to select a known volume of fluid flow.
Claim 15
Dependent Claim
98 words
The improvement in sliding plate orifice dampers as defined in claim 12 wherein each of said plurality of trapezoidal shaped apertures in said fixed plate have an orientation relative to said fixed plate and each of said plurality of trapezoidal shaped apertures in said sliding plate also have an orientation relative to said sliding plate, said sliding plate slideably juxtaposed said fixed plate such that said orientation of each of said plurality of trapezoidal shaped apertures of said fixed plate is opposite to said orientation of each of said plurality of trapezoidal shaped apertures of said sliding plate.
Claim 16
Dependent Claim
82 words
The improvement in sliding plate orifice dampers as defined in claim 13 wherein each of the said plurality of trapezoidal shaped apertures of said fixed plate and of said sliding plate has a major base and a minor base, and a height between each said major base and said minor base, and each of said plurality of said trapezoidal shaped apertures of said fixed plate and of said sliding plate defines a center line bisecting said major base and said minor base.
Claim 17
Dependent Claim
79 words
The improvement in sliding plate orifice dampers as defined in claim 14 wherein each of said plurality of trapezoidal shaped apertures of said fixed plate defines an isosceles trapezoid and each of said plurality of trapezoidal shaped apertures of said sliding plate also defined an isosceles trapezoid, and each of said plurality of said trapezoidal shaped apertures of said fixed plate is the same size as each of said plurality of said trapezoidal shaped apertures of said sliding plate.
Claim 18
Dependent Claim
50 words
The improvement in sliding plate orifice dampers as defined in claim 15 wherein said center line of each of said plurality of trapezoidal shaped apertures of said fixed plate coincides with said center line of a respective trapezoidal shaped aperture of said sliding plate to form said resultant composite orifices.
Claim 19
Dependent Claim
87 words
The improvement in sliding plate orifice dampers as defined in claim 16 further including means to align said sliding plate to said fixed plate, said means to align maintaining said center line of each of said plurality of trapezoidal shaped apertures of said sliding plate trapezoidal aperture coincident with said center line of respective trapezoidal apertures of said fixed plate as said sliding plate is moved relative to said fixed plate, and means to controllably adjust said position of said sliding plate relative to said fixed plate.
Claim 20
Dependent Claim
97 words
The improvement in sliding plate orifice dampers as defined in claim 16 wherein said plurality of trapezoidal shaped apertures of said fixed plate are arranged in rows and in columns, and said plurality of trapezoidal shaped apertures of said sliding plate are also arranged in rows and columns, said arrangement of trapezoidal shaped apertures of said sliding plate complimentary to said arrangement of plurality of trapezoidal shaped apertures of said fixed plate such that each of the plurality of trapezoidal shaped apertures of said fixed plate has a corresponding overlapping trapezoidal shaped aperture of said sliding plate.
Claim 21
Dependent Claim
62 words
The improvement in sliding plate orifice dampers as defined in claim 18 wherein each said arrangement of trapezoidal shaped apertures of said sliding plate and of said fixed plate define a first set of rows and columns and a second set of rows and columns, said second set of rows and columns selectively interlaced with said first set of rows and columns.
Claim 22
Dependent Claim
25 words
The improvement in sliding plate orifice dampers as defined in claim 19 wherein said fixed plate is planar and said sliding plate is also planar.
Claim 23
Dependent Claim
25 words
The improvement in sliding plate orifice dampers as defined in claim 19 wherein said fixed plate is curved and said sliding plate is also curved.
Claim 24
Dependent Claim
25 words
The improvement in sliding plate orifice dampers as defined in claim 19 wherein said fixed plate is conical and said sliding plate is also conical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |