US3723027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping units
Assignee: Imo Industri AB
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Filing: 1971-08-26
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Granted: 1973-03-27
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Expires: 1991-08-26
Abstract
Abstract Sound generated by a submerged motor-pump unit and transmitted through the liquid in which the unit is submerged is attenuated by shielding means comprising a first box-like member having a downwardly facing opening and a second box-like member having an upwardly facing opening and overlapping the first box-like member. The box-like members are made from sheet metal coated with foam rubber or other sound-absorbing material.
Inventors
- 👤 T Montelius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:32
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/008; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/66; F04D29/669; Y; Y10; Y10S; Y10S60/00; Y10S60/916
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A pumping unit comprising a tank for containing a liquid to be pumped, a pump and motor assembly disposed in the tank below the normal liquid level therein, and shielding means essentially enclosing the pump and motor assembly comprising first and second box-like members, each made at least in part from sound-absorbing material, and each having one open end, said members having their open ends facing in opposite directions and being so arranged that one at least partially encloses the other with a space between their walls to allow circulation of liquid between the spaces within and outside of the shielding means.
Claim 2
Dependent Claim
102 words
A pumping unit comprising a tank for containing a liquid to be pumped, a pump and motor assembly disposed in the tank below the normal liquid level therein, and shielding means essentially enclosing the pump and motor assembly comprising first and second box-like members, each made at least in part from sound-absorbing material, and each having one open end, said members having their open ends facing in opposite directions and being so arranged that one at least partially encloses the other with a space between their walls to allow circulation of liquid between the spaces within and outside of the shielding means.
References Cited (Backward Citations)
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Cited
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US3021914A
Cited
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |