US3798787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for recovery of volatile solvents
Assignee: Valeo Engine Cooling Inc
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Filing: 1971-06-07
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Granted: 1974-03-26
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Expires: 1991-06-07
Abstract
Abstract An apparatus is provided for recovering organic solvent vapor which includes an article treating chamber in which the organic solvent is applied, a vapor chamber into which the article passes for drying, a refrigerated fall out chamber receiving gases from the vapor chamber to remove vapor by condensation and returning the gases to the vapor chamber and means circulating the gases used as a carrier.
Inventors
- 👤 H Heen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:23
CPC Classifications
F; F26; F26B; F26B25/00; F26B25/005; F26B25/006; F26B21/00; F26B21/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
142 words
An apparatus for recovering a normally explosive organic solvent vapor comprising an article treating chamber in which organic solvent is applied, an inlet air lock entry means into said treatment through which articles to be treated are introduced, a vapor chamber connected to said article treatment chamber receiving the treated article from the article treatment chamber for dwell therein until substantially all of the vaporizable solvent is removed, an air lock exit means on said vapor chamber through which treated articles are delivered, a refrigerated fall out chamber adjacent the vapor chamber continuously receiving gases from the vapor chamber and removing liquified solvent therefrom by condensation, means circulating the gases from the fall out chamber to the article treating chamber and vapor chamber through the entry and exit air locks and means for maintaining a substantially dry non-reactive atmosphere in said chambers.
Claim 2
Independent Claim
142 words
An apparatus for recovering a normally explosive organic solvent vapor comprising an article treating chamber in which organic solvent is applied, an inlet air lock entry means into said treatment through which articles to be treated are introduced, a vapor chamber connected to said article treatment chamber receiving the treated article from the article treatment chamber for dwell therein until substantially all of the vaporizable solvent is removed, an air lock exit means on said vapor chamber through which treated articles are delivered, a refrigerated fall out chamber adjacent the vapor chamber continuously receiving gases from the vapor chamber and removing liquified solvent therefrom by condensation, means circulating the gases from the fall out chamber to the article treating chamber and vapor chamber through the entry and exit air locks and means for maintaining a substantially dry non-reactive atmosphere in said chambers.
Claim 3
Dependent Claim
43 words
An apparatus as claimed in claim 1 wherein each of the exit and entry air locks is a plurality of moving baffles defining a plurality of small moving chambers in which the articles for treatment are carried into and out of the system.
Claim 4
Dependent Claim
33 words
An apparatus as claimed in claim 1 wherein the means maintaining a substantially dry non-reactive atmosphere includes a dehumidifier and filter over which the gases pass prior to reaching the fall out chamber.
Claim 5
Dependent Claim
51 words
An apparatus as claimed in claim 1 including a heat exchanger adjacent the fall out chamber receiving in heat exchange relationship gases going to and coming from the fall out chamber whereby the gases going to the fall out chamber are cooled by the gases coming from said fall out chamber.
Claim 6
Dependent Claim
31 words
An apparatus as claimed in claim 1 wherein the means maintaining a substantially dry non-reactive atmosphere includes a source of non-reactive gas from the group consisting of inert gases and nitrogen.
Claim 7
Dependent Claim
21 words
An apparatus as claimed in claim 1 wherein emergency stack means are provided with connections to the treatment and vapor chambers.
Claim 8
Independent Claim
92 words
A method of recovering a normally explosive organic solvent vapor from the treatment of articles with a solvent containing system comprising the steps of: a. introducing the articles to be treated through air lock means into a treatment chamber and an adjacent connected vapor chamber within a housing, b. maintaining a constant recirculating flow of carrier gas through said housing, c. passing the recirculating carrier gas successively through a filter, heat exchanger and refrigerated chamber whereby solvent vapor is condensed from the carrier gas, and d. collecting the condensed solvent for reuse.
Claim 9
Independent Claim
92 words
A method of recovering a normally explosive organic solvent vapor from the treatment of articles with a solvent containing system comprising the steps of: a. introducing the articles to be treated through air lock means into a treatment chamber and an adjacent connected vapor chamber within a housing, b. maintaining a constant recirculating flow of carrier gas through said housing, c. passing the recirculating carrier gas successively through a filter, heat exchanger and refrigerated chamber whereby solvent vapor is condensed from the carrier gas, and d. collecting the condensed solvent for reuse.
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |