US3764238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid and air mixing gear pump
Assignee: Individual
•
Filing: 1972-01-24
•
Granted: 1973-10-09
•
Expires: 1992-01-24
Abstract
Abstract The air intake ports of a liquid and air sucking and mixing gear pump are put into communication with the atmosphere through a collecting tank or chamber, in which the small amounts of foamy liquid-and-air emulsion flowing out from said ports during the stopping time of the pump are collected, and from which the amounts of emulsion are again sucked back into the pump as soon as the pump operation is again started.
Inventors
- 👤 P Carpigiani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:10
CPC Classifications
A; A01; A01J; A01J13/00; A23; A23G; A23G3/00; A23G3/02; A23G3/0236; A23G3/0294; A23G9/00; A23G9/04; A23G9/045; A23G9/20; B; B01; B01F; B01F25/00; B01F25/60; B01F25/62; F; F04; F04C; F04C13/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
In a gear pump for the feeding of liquid-and-air mixes, which comprises a liquid intake port upstream of the region in which the pump gears are in mesh, a liquid-and-air emulsion delivery port downstream of the region in which the pump gears are in mesh, and two air intake ports, one for each one of the pump gears, to be disposed on the gear path between the liquid intake port and the emulsion delivery port, the improvement comprising a collecting chamber, and wherein said air intake ports are put into communication with the atmosphere through said collecting chamber.
Claim 2
Dependent Claim
98 words
In a gear pump for the feeding of liquid-and-air mixes, which comprises a liquid intake port upstream of the region in which the pump gears are in mesh, a liquid-and-air emulsion delivery port downstream of the region in which the pump gears are in mesh, and two air intake ports, one for each one of the pump gears, to be disposed on the gear path between the liquid intake port and the emulsion delivery port, the improvement comprising a collecting chamber, and wherein said air intake ports are put into communication with the atmosphere through said collecting chamber.
Claim 3
Dependent Claim
47 words
A gear pump according to claim 1, wherein said collecting chamber is formed in the pump body itself and is constituted by a substantially vertically running tubular duct communicating at its lower end with each one of the intake ports and, at its top, with the atmosphere.
References Cited (Backward Citations)
US3479957A
Cited
US3628893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |