US3782497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound muffler for drainage device
Assignee: MTG Divestitures LLC
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Filing: 1972-10-18
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Granted: 1974-01-01
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Expires: 1992-10-18
Abstract
Abstract Drainage device of the type shown in U.S. Pat. Nos. 3,363,626; 3,363,627 and 3,683,913. For use with vacuum, the device has three chambers: collection, seal, and manometer. In operation, a gas bubbles through a body of liquid in the manometer chamber and this is sometimes quite noisy. In accordance with the invention, the opening of the manometer chamber which is open to atmosphere is closed with a sound muffling member which does not substantially impede gas flow through the opening. The sound muffling member is preferably a member having a tortuous aperture extending therethrough, the size of the aperture being sufficient to permit the free flow of gas.
Inventors
- 👤 R Bidwell
- 👤 L Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:45
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/60; A61M1/61; A61M2205/00; A61M2205/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
A sound muffler for reducing the sound emanating from an atmospheric opening of a drainage device for draining fluids from a cavity comprising a member having an external configuration corresponding to said opening such that said opening is closed by insertion of said member therein, said member having opposite surfaces and a tortuous aperture located in said member extending therethrough from one to the other of said opposite surfaces to provide communication with said drainage device, the cross section of said aperture being at least about 0.01 square inches and not more than 0.20 square inches.
Claim 2
Dependent Claim
96 words
A sound muffler for reducing the sound emanating from an atmospheric opening of a drainage device for draining fluids from a cavity comprising a member having an external configuration corresponding to said opening such that said opening is closed by insertion of said member therein, said member having opposite surfaces and a tortuous aperture located in said member extending therethrough from one to the other of said opposite surfaces to provide communication with said drainage device, the cross section of said aperture being at least about 0.01 square inches and not more than 0.20 square inches.
Claim 3
Dependent Claim
13 words
A sound muffler according to claim 1 wherein said member comprises foamed material.
Claim 4
Dependent Claim
13 words
A sound muffler according to claim 1 wherein said member comprises plastic foam.
Claim 5
Dependent Claim
15 words
A sound muffler according to claim 1 wherein said member includes a single tortuous aperture.
Claim 6
Dependent Claim
201 words
In a drainage device for draining fluids from a cavity having a collection chamber having an inlet opening to be placed in fluid communication with a cavity to be drained, a seal chamber having first and second columns in communication with each other at the lower ends thereof and adapted to receive a body of liquid in the lower portion of said first and second seal chamber columns, the upper end of the first seal chamber column being in fluid communication with said collection chamber, the upper end of said second seal chamber column being in fluid communication with a vaccum source, and a manometer chamber comprising first and second columns in fluid communication with each other at the lower ends thereof and adapted to receive a body of liquid in the lower portion of said first and second manometer chamber columns, the upper portion of said first manometer chamber column being in fluid communication with said vacuum source and the upper portion of said second manometer chamber being open to atmosphere, the improvement wherein the opening of said second manometer chamber is closed with a sound muffler member which does not substantially impede the flow of gas through said opening.
Claim 7
Dependent Claim
201 words
In a drainage device for draining fluids from a cavity having a collection chamber having an inlet opening to be placed in fluid communication with a cavity to be drained, a seal chamber having first and second columns in communication with each other at the lower ends thereof and adapted to receive a body of liquid in the lower portion of said first and second seal chamber columns, the upper end of the first seal chamber column being in fluid communication with said collection chamber, the upper end of said second seal chamber column being in fluid communication with a vaccum source, and a manometer chamber comprising first and second columns in fluid communication with each other at the lower ends thereof and adapted to receive a body of liquid in the lower portion of said first and second manometer chamber columns, the upper portion of said first manometer chamber column being in fluid communication with said vacuum source and the upper portion of said second manometer chamber being open to atmosphere, the improvement wherein the opening of said second manometer chamber is closed with a sound muffler member which does not substantially impede the flow of gas through said opening.
Claim 8
Dependent Claim
19 words
An improved drainage device according to claim 5 wherein said sound muffler membeR comprises the member of claim 1.
Claim 9
Dependent Claim
19 words
An improved drainage device according to claim 5 wherein said sound muffler member comprises the member of claim 2.
Claim 10
Dependent Claim
19 words
An improved drainage device according to claim 5 wherein said sound muffler member comprises the member of claim 3.
Claim 11
Dependent Claim
19 words
An improved drainage device according to claim 5 wherein said sound muffler member comprises the member of claim 4.
References Cited (Backward Citations)
US2936788A
Cited
US3683913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |