US3234962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam pump system
Assignee: Chemetron Fire Systems Inc
•
Filing: 1962-08-27
•
Granted: 1966-02-15
•
Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Hilding V Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:47
CPC Classifications
A; A62; A62C; A62C5/00; A62C5/002; A62C25/00; A62C25/005; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/85986
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
136 words
IN A FOAM PUMP SYSTEM: A PUMP INCLUDING A HOUSING DEFINING A CHAMBER, SAID HOUSING HAVING AN INLET PASSAGE AND AN OUTLET PASSAGE IN COMMUNICATION WITH SAID CHAMBER, CONDUIT MEANS FOR CONDUCTING A LIQUID MIXTURE OF WATER AND FOAM STABILIZER TO SAID INLET PASSAGE OF SAID PUMP, SAID PUMP HAVING MEANS DISPOSED IN SAID CHAMBER FOR CREATING A VACUUM TO DRAW THE FLUID MIXTURE FROM SAID CONDUIT MEANS, THROUGH SAID INLET PASSAGE AND INTO SAID CHAMBER AND FOR DISCHARGING THE LIQUID MIXTURE FROM SAID CHAMBER THROUGH SAID OUTLET PASSAGE UNDER PRESSURE MEANS FOR ENABLING A GASEOUS FLUID TO BE FREELY ADMITTED INTO SAID CHAMBER BETWEEN SAID INLET AND OUTLET PASSAGES, AND RESTRICTING MEANS TO ADMIT A CONTROLLED AMOUNT OF A GASEOUS FLUID INTO SAID CONDUIT MEANS FOR CONTROLLING THE AMOUNT OF LIQUID DRAWN INTO SAID PUMP.
References Cited (Backward Citations)
US1614437A
Cited
US1804604A
Cited
US2480925A
Cited
US2752934A
Cited
US2887275A
Cited
US2924178A
Cited
US2827858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |