US3785387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical processing facility
Assignee: Northrop Grumman Corp
•
Filing: 1972-07-20
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Granted: 1974-01-15
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Expires: 1992-07-20
Abstract
Abstract A hermetically sealed booth enclosing a quantity of parts to be chemically processed, and tanks containing the various chemical solutions being positioned below the parts booth and sequentially movable to positions below the booth whereby the solution in a single tank is pumped into the booth, sprayed over the parts and returned to the tank through a drain opening in the floor of the booth. All fumes and contaminants emanating from the solutions are passed through filters or air washers before being exhausted to atmosphere.
Inventors
- 👤 F Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:18
CPC Classifications
C; C23; C23G; C23G3/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A chemical processing facility comprising a substantially hermetically sealed booth adapted to contain parts to be treated, a drain spout in the floor of said booth, a plurality of covered tanks for containing chemical solutions and the like, pump and delivery means associated respectively with said tanks to selectively pump the contents from each said tank into said booth and over parts contained therein, said solution draining through said drain spout, return means for returning said drained solution to its corresponding tank, means for removing residual solutions and contaminants from said booth, at least one sleeved opening being provided in the cover of each tank, and including a rotatable base supporting said tanks below said booth, said base being located with respect to said booth so that the sleeved opening of said tanks are aligned with said drain spout in said booth as said base is rotated.
Claim 2
Dependent Claim
147 words
A chemical processing facility comprising a substantially hermetically sealed booth adapted to contain parts to be treated, a drain spout in the floor of said booth, a plurality of covered tanks for containing chemical solutions and the like, pump and delivery means associated respectively with said tanks to selectively pump the contents from each said tank into said booth and over parts contained therein, said solution draining through said drain spout, return means for returning said drained solution to its corresponding tank, means for removing residual solutions and contaminants from said booth, at least one sleeved opening being provided in the cover of each tank, and including a rotatable base supporting said tanks below said booth, said base being located with respect to said booth so that the sleeved opening of said tanks are aligned with said drain spout in said booth as said base is rotated.
Claim 3
Dependent Claim
28 words
The invention defines in claim 1, wherein said delivery means comprises a plurality of pipes and nozzles supported in said booth to introduce treating liquid into said parts.
Claim 4
Dependent Claim
41 words
The invention defined in claim 1, in which closure valve means is housed in said sleeved openings and means for operating said valve to substantially seal said tanks when said tanks are not aligned with said drain spout in said booth.
Claim 5
Dependent Claim
36 words
The invention defined in claim 1, including means for rotating said base to position one said tank, in sequence, after another in aligned position with said drain spout in the sequence dictated by the chemical process.
Claim 6
Dependent Claim
26 words
The invention defined in claim 1, in which means are provided for heating said chemical solutions in said delivery means, as dictated by the chemical process.
Claim 7
Dependent Claim
50 words
The invention defined in claim 1, in which means are provided for introducing drying air into said booth, said drying air being exhausted from said booth throuh said spout, and including vent means surrounding said spout, said vent means having an air washer in an outlet thereof to the atmosphere.
Claim 8
Dependent Claim
28 words
The invention defined in claim 6, in which means are provided for heating and filtering said drying air prior to said drying air being introduced into said booth.
Claim 9
Dependent Claim
40 words
The invention defined in claim 6, in which the said tanks are located in a substantially hermetically sealed chamber in which means are provided for exhausting fumes from said chamber through said air washer before being exhausted to the atmosphere.
References Cited (Backward Citations)
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Cited
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Cited
US2702042A
Cited
US2963029A
Cited
US3400726A
Cited
US3593728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |