US3607779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam generator
Assignee: MSA Safety Inc
•
Filing: 1969-08-07
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Granted: 1971-09-21
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Expires: 1989-08-07
Abstract
Abstract A tubular housing with a rear inlet and a front-end outlet has a foraminous cover over its front end. A shaft extends lengthwise of the inside of the housing and is rotatably supported. It is driven by a water turbine on its front end, the turbine having an inlet for water under pressure and a central front outlet that delivers the water to a forwardly directed nozzle connected to the turbine. Rigidly mounted on the shaft behind the turbine is a fan for blowing air through the housing from back to front. Also mounted on the shaft is a pump for delivering foaming solution to the rear end of the nozzle to mix with the water from the turbine outlet.
Inventors
- 👤 Earle C King
- 👤 Walter Milich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/04; A; A62; A62C; A62C3/00; A62C3/02; A62C3/0207; E; E21; E21B; E21B21/00; E21B21/14; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A foam generator according to claim 1, in which said shaft is provided with a flexible coupling between the fan and pump.
Claim 2
Dependent Claim
62 words
A foam generator according to claim 1, in which said shaft supporting means include a bracket mounted inside said housing and provided in front of the fan with a bearing for the shaft, the turbine having a housing separated from said bearing and rigidly mounted on said bracket in front of the bearing, and an impeller in the turbine on said shaft.
Claim 3
Dependent Claim
30 words
A foam generator according to claim 1, in which said pump is mounted on said shaft behind the fan, the generator including means mounted inside said housing supporting the pump.
Claim 4
Dependent Claim
179 words
A foam generator comprising a tubular housing having a rear inlet end and a front outlet end, a foraminous member covering said front end, a shaft extending lengthwise of the housing centrally thereof, a bearing between the turbine and fan supporting the shaft for rotation on its axis, a bracket supporting the bearing a water turbine on the front end of the shaft for driving it, the turbine having an inlet for water under pressure and a central front outlet, a forwardly directed nozzle connected to the turbine outlet for receiving water therefrom, a fan rigidly mounted on the shaft behind the turbine for blowing air through the housing from back to front, a pump mounted on the shaft and having an inlet and an outlet, the shaft being provided with a flexible coupling between the fan and pump, means for conNecting the pump inlet to a source of foaming solution, and a conduit connecting the pump outlet with the rear end of the nozzle to deliver foaming solution thereto to mix with water discharging from the turbine outlet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |