US3834136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas drying apparatus and method
Assignee: Ingersoll Rand Co
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Filing: 1973-04-10
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Granted: 1974-09-10
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Expires: 1993-04-10
Abstract
Abstract The subject apparatus was devised for compressed gas drying systems which typically use vacuum-producing devices for evacutating a gas drying desiccant chamber. The invention comprises the use of an ejector for evacuating the gas drying desiccant chamber, in a first mode of operation, and the use of the ejector as a simple fluid conductor or connector, for directing compressed gas to the desiccant chamber, in a second mode of operation. A fluid-signal control valve opens and closes the ejector outlet, to effect the first and second modes of operation. The method comprises closing off an ejector diffusor to cause cycling or shunting of the gas directed thereinto to the vacuum port of the ejector.
Inventors
- 👤 J Dussourd
- 👤 R Haugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:45
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
13 words
Apparatus, according to claim 1, wherein: said vacuum-producing means comprises a fluid-powered ejector.
Claim 2
Dependent Claim
89 words
Apparatus, according to claim 1, wherein: said vacuum-producing means comprises an elongated fluid-powered ejector having a fluid inlet means at one end thereof for admitting gas into said ejector, and fluid outlet means at the end opposite for venting gas from said ejector; said operation-changing means comprises valving means coupled to said fluid outlet means, operative in first and second valving dispositions, respectively, for opening and closing said outlet means to the conduct of gas therethrough to effect operation of said ejector in said first and second modes, respectively.
Claim 3
Dependent Claim
56 words
Apparatus, according to claim 3, wherein: said operation-changing means further comprises means coupled to said valving means and to said second means for sensing fluid back pressure in said second means, and operative of said valving means, upon sensing a predetermined back pressure, to dispose said valving means in one of said first and second dispositions.
Claim 4
Dependent Claim
44 words
Apparatus, according to claim 4, wherein: said fluid outlet means comprises a venting duct; said valving means comprises an on-off valve disposed within said duct; said second means comprises a conduit; and said sensing means comprises a sensor in fluid communication with said conduit.
Claim 5
Dependent Claim
117 words
Apparatus, according to claim 1, wherein: said chamber means comprises a walled chamber; said first means comprises a first conduit coupled at one end thereof to said chamber said one end opening onto said chamber through a given wall thereof; said second means comprises a second conduit coupled at one end thereof to said chamber, said one end of said second conduit also opening onto said chamber through a wall thereof other than said given wall; and further including a third conduit coupled at one end thereof to said chamber, for channeling purge fluid to said chamber; said one end of said third conduit opening onto said chamber through a wall thereof other than said given wall.
Claim 6
Dependent Claim
39 words
Apparatus, according to claim 6, wherein: said third conduit is coupled at the opposite end thereof to said first conduit, said opposite end of said third conduit opens onto said first conduit intermediate the ends of said first conduit.
Claim 7
Dependent Claim
25 words
Apparatus, according to claim 6, wherein: one of said first and third conduits has orifice means for restricting fluid flow therethrough to a predetermined value.
Claim 8
Dependent Claim
26 words
Apparatus, according to claim 6, wherein: said third conduit has an orifice interpositioned therein for restricting the channeling of purge fluid therethrough to a predetermined value.
Claim 9
Dependent Claim
78 words
For use with a desiccant chamber, compressed gas drying system which uses a diffusor-type ejector powered by a primary, compressed gas line to evacuate the chamber via secondary, ejector-to-chamber gas line, a method of changing ejector operation from a chamber-evacuating mode of operation to a gas through-cycling mode of operation, comprising the step of: closing off the ejector diffusor to cause gas from the primary gas line to be passed through the ejector into the secondary gas line.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |