Patent US4091643A successfully refreshed from Google Patents.
US4091643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for the recovery of solvent vapor evolved in the course of a cleaning cycle in dry-cleaning machines or plants, and for the de-pressurizing of such machines
Assignee: Ama Universal SpA
•
Filing: 1977-02-17
•
Granted: 1978-05-30
•
Expires: 1997-02-17
Abstract
Abstract Recovery of solvent vapor in the course of the cleaning cycle in dry-cleaning machines and/or plants, which include a cleaning circuit, a drying circuit and a distillation circuit, in which low boiling-point solvents are utilized in particular, and simultaneous de-pressurization of such machines, inside of which, in the course of said dry-cleaning operation, a partial evaporation of the solvent occurs which results in the building-up of a given pressure, are accomplished by means of a filter, which whose inlet is directly connected with any point of the drying circuit, while its outlet is directly connected with the outside.
Inventors
- 👤 Guido Zucchini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:26
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/02; D06F43/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
In dry-cleaning machines and/or plants including a cleaning circuit comprising a cleaning drum, a solvent tank, a solvent circulating pump and a filter for the solvent, all connected in series, and a drying and solvent recovery circuit comprising said drum, a circulating fan and a condenser connected in series, the vapor outlet of said condenser being connected through a heater to said drum and the liquid outlet of said condenser being connected through a separator to said tank, the improvement whereby solvent vapors evolved in the course of a cleaning cycle in such machines and/or plants are recovered and such machines and/or plants are depressurized, consisting essentially of: a solvent recovery filter, located at a level higher than the remainder of the machine and/or plant, said filter having an inlet directly connected with the highest point of said drying circuit, and an outlet leading directly to the atmosphere.
Claim 2
Dependent Claim
148 words
In dry-cleaning machines and/or plants including a cleaning circuit comprising a cleaning drum, a solvent tank, a solvent circulating pump and a filter for the solvent, all connected in series, and a drying and solvent recovery circuit comprising said drum, a circulating fan and a condenser connected in series, the vapor outlet of said condenser being connected through a heater to said drum and the liquid outlet of said condenser being connected through a separator to said tank, the improvement whereby solvent vapors evolved in the course of a cleaning cycle in such machines and/or plants are recovered and such machines and/or plants are depressurized, consisting essentially of: a solvent recovery filter, located at a level higher than the remainder of the machine and/or plant, said filter having an inlet directly connected with the highest point of said drying circuit, and an outlet leading directly to the atmosphere.
Claim 3
Dependent Claim
20 words
An apparatus according to claim 1, wherein the inlet of said solvent recovery filter is connected with said dry-cleaning drum.
Claim 4
Dependent Claim
31 words
An apparatus according to claim 1, wherein said condenser is always connected with the dry-cleaning drum, and wherein the inlet of said solvent recovery filter is directly connected with said condenser.
Claim 5
Dependent Claim
32 words
An apparatus according to claim 3, wherein said solvent recovery filter is subdivided into two chambers, including a free bottom chamber and an upper chamber in which a filter cartridge is fitted.
Claim 6
Dependent Claim
15 words
A circuit according to claim 4, wherein said filter cartridge is filled with activated charcoal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |