US3687360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise suppressing baffle discharge exit
Assignee: Beloit Corp
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Filing: 1969-11-19
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Granted: 1972-08-29
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Expires: 1989-11-19
Abstract
Abstract A baffle, which is used in a discharge duct which removes material tangentially from a device with rotating blades such as a vertical shaft refiner or centrifuge, suppresses noise of the device and limits the product buildup on the walls of the duct. The baffle has a portion blocking part of the opening between the device and the duct with a second portion extending along the duct providing a change in the cross-section of the duct adjacent the opening. Due to the change in the cross-section caused by the baffle, material being discharged into the duct expands with a corresponding decrease in its velocity of travel to eliminate or reduce the tendency of the material to stick to the side wall of the duct to cause a product buildup.
Inventors
- 👤 Stanley R Prew
- 👤 Llewelyn E Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:17
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/02; B04B7/00; B04B7/02; B04B7/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
173 words
In a device having a housing with a substantially cylindrical inner periphery for receiving a rotating member and a tangential discharge duct forming a discharge opening for said housing, the improvement comprising means reducing the buildup of products removed through said duct on the wall surfaces thereof and reducing the noise of the operation of said device, said means including a baffle member disposed in said opening to block a portion thereof, said baffle member including a first surface closing a portion of the opening forming an effective opening and a second surface extending from said first surface along said duct, said second surface extending from a leading edge of the first surface at an angle to the axis of the duct and merging with the wall of said duct forming a cross-sectional area of the duct which increases along the duct from said effective opening, the leading edge of said second surface forming an acute angle with a plane extending perpendicular to the axis of the cylindrical inner periphery of the housing.
Claim 2
Dependent Claim
173 words
In a device having a housing with a substantially cylindrical inner periphery for receiving a rotating member and a tangential discharge duct forming a discharge opening for said housing, the improvement comprising means reducing the buildup of products removed through said duct on the wall surfaces thereof and reducing the noise of the operation of said device, said means including a baffle member disposed in said opening to block a portion thereof, said baffle member including a first surface closing a portion of the opening forming an effective opening and a second surface extending from said first surface along said duct, said second surface extending from a leading edge of the first surface at an angle to the axis of the duct and merging with the wall of said duct forming a cross-sectional area of the duct which increases along the duct from said effective opening, the leading edge of said second surface forming an acute angle with a plane extending perpendicular to the axis of the cylindrical inner periphery of the housing.
Claim 3
Dependent Claim
52 words
In a device constructed in accordance with claim 1 wherein said discharge duct is rectangular in shape and wherein said second surface is triangular in shape and is disposed in a corner of said duct at said discharge opening with its leading edge causing the effective opening to be trapezoidal in shape.
Claim 4
Dependent Claim
24 words
In a device constructed in accordance with claim 1 wherein said first and second surfaces are formed by plates mounted in the discharge opening.
Claim 5
Dependent Claim
38 words
In a device constructed in accordance with claim 1 wherein the cross-sectional area of the discharge duct increases outwardly of the opening with the direction of the increase in the area extending toward one side of the housing.
Claim 6
Dependent Claim
40 words
In a device constructed in accordance with claim 1 wherein said surfaces are formed by plates with the plate forming the first surface having a curvature substantially the same as the curvature of the cylindrical inner periphery of the housing.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |