Patent US3752439A successfully refreshed from Google Patents.
US3752439A
Expired / Lapsed
US
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Damper arrangement
Assignee: Allis Chalmers Corp
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Filing: 1971-11-15
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Granted: 1973-08-14
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Expires: 1991-11-15
Abstract
Abstract A damper arrangement wherein a damper blade opens and closes a flow through orifice and wherein a baffle means is provided which maintains an opening of constant cross section during a portion of the stroke of the damper blade to provide a buffered transition when removing a fluid system from or returning a system to full fluid flow.
Inventors
- 👤 J Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:24
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/54; F16K47/00; F16K47/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A damper arrangement comprising: a plate having an orifice located therein; an orifice closing blade movably positioned between an open position and a closed position in relation to said orifice; actuating means for moving said blade relative to said plate; and baffle means positioned in cooperative arrangement with said blade and said orifice to provide a flow through opening defined by the edge of said orifice and said baffle means of constant cross section during a predetermined time period during the blade movement.
Claim 2
Dependent Claim
83 words
A damper arrangement comprising: a plate having an orifice located therein; an orifice closing blade movably positioned between an open position and a closed position in relation to said orifice; actuating means for moving said blade relative to said plate; and baffle means positioned in cooperative arrangement with said blade and said orifice to provide a flow through opening defined by the edge of said orifice and said baffle means of constant cross section during a predetermined time period during the blade movement.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said baffle means is attached to said blade and is circumscribed by said orifice.
Claim 4
Dependent Claim
33 words
The apparatus of claim 2 wherein said orifice is generally circular and said baffle means is a generally cylindrical projection of smaller diameter than said orifice and spaced generally concentrically to said orifice.
Claim 5
Dependent Claim
23 words
The apparatus of claim 3 wherein said generally cylindrical projection is of an axial length of about one fourth of said orifice diameter.
Claim 6
Dependent Claim
27 words
The apparatus of claim 4 wherein said generally cylindrical projection is of a diameter in the range of about two thirds of the diameter of said orifice.
Claim 7
Dependent Claim
42 words
The apparatus of claim 5 wherein said generally cylindrical projection is of such length that it is at least a distance equal to one fourth of the diameter of said orifice from said orifice when said blade is in its open position.
Claim 8
Dependent Claim
22 words
The apparatus of claim 1 wherein said baffle means is attached to said plate and circumscribes said blade in its closed position.
Claim 9
Dependent Claim
38 words
The apparatus of claim 7 wherein said orifice and said blade are circular and said baffle means is a generally cylindrical projection attached to said plate and spaced generally concentrically with respect to said orifice and said blade.
Claim 10
Dependent Claim
24 words
The apparatus of claim 8 wherein said generally cylindrical projection is of an axial eight equal to about one fourth of sAid orifice diameter.048191324
Claim 11
Dependent Claim
27 words
The apparatus of claim 9 wherein said generally cylindrically shaped portion is of a diameter in the range of about 1.33 times the diameter of said blade.
References Cited (Backward Citations)
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US3019809A
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |