US3892499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage turbocompressor having an intermediate cooler
Assignee: Sulzer Escher Wyss AG
•
Filing: 1973-07-12
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Granted: 1975-07-01
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Expires: 1993-07-12
Abstract
Abstract The compressor housing is connected to the cooler by a casing duct to direct the intially compressed gas to the cooler while a central duct within the casing duct returns the cooled air to the housing and to the second compressor. The heated wall of the central duct serves to vaporize any droplets of fluid in the return gas flow which might otherwise damage the second compressor.
Inventors
- 👤 Rene Strub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:11
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/58; F04D29/582; F04D29/5826; F04D17/00; F04D17/02; F04D17/025
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
In a multistage turbocompressor having a compressor housing including an inlet and an outlet and an intermediate cooler outside said housing; a casing duct connected between said housing and said cooler downstream of said inlet for passing a flow of heated compressed gas from said housing to said cooler for cooling therein, and a central duct enclosed within said casing duct and connected between said cooler and said housing upstream of said outlet for passing the flow of cooled compressed gas from said cooler to said housing for passage out of said outlet.
Claim 2
Dependent Claim
93 words
In a multistage turbocompressor having a compressor housing including an inlet and an outlet and an intermediate cooler outside said housing; a casing duct connected between said housing and said cooler downstream of said inlet for passing a flow of heated compressed gas from said housing to said cooler for cooling therein, and a central duct enclosed within said casing duct and connected between said cooler and said housing upstream of said outlet for passing the flow of cooled compressed gas from said cooler to said housing for passage out of said outlet.
Claim 3
Dependent Claim
22 words
In a multistage turbocompressor as set forth in claim 1, said casing duct and said central duct each having a bend therein.
Claim 4
Dependent Claim
33 words
In a multistage turbocompressor as set forth in claim 1, said housing being split in two halves in an axial plane and said ducts being connected to the lower half of said housing.
Claim 5
Dependent Claim
31 words
In a multistage turbocompressor as set forth in claim 3, wherein two said casing ducts are connected to said lower housing half symmetrically of a vertical axial plane of said housing.
Claim 6
Dependent Claim
43 words
In a multistage turbocompressor as set forth in claim 1, means connected between said casing duct and said central duct for selectively introducing a variable amount of heated gas from said casing duct into the flow of cooled gas in said central duct.
Claim 7
Dependent Claim
131 words
A multistage turbocompressor comprising a housing including an inlet and an outlet; a first compressor in said housing downstream of said inlet for heating and compressing a flow of gas to a first pressure; a second compressor in said housing downstream of said first compressor and upstream of said outlet for compressing the flow of gas to a higher pressure than said first pressure; a cooler outside said housing for cooling the flow of heated gas; a casing duct connected between said housing and said cooler for passing the flow of heated gas to said cooler from said first compressor; and a central duct enclosed within said casing duct and connected between said cooler and said housing for passing the flow of cooled gas from said cooler to said second compressor.
Claim 8
Dependent Claim
131 words
A multistage turbocompressor comprising a housing including an inlet and an outlet; a first compressor in said housing downstream of said inlet for heating and compressing a flow of gas to a first pressure; a second compressor in said housing downstream of said first compressor and upstream of said outlet for compressing the flow of gas to a higher pressure than said first pressure; a cooler outside said housing for cooling the flow of heated gas; a casing duct connected between said housing and said cooler for passing the flow of heated gas to said cooler from said first compressor; and a central duct enclosed within said casing duct and connected between said cooler and said housing for passing the flow of cooled gas from said cooler to said second compressor.
Claim 9
Dependent Claim
24 words
A multistage turbocompressor as set forth in claim 6 wherein each duct has a bend therein for deflecting a respective flow of gas therein.
Claim 10
Dependent Claim
18 words
A multistage turbocompressor as set forth in claim 6 wherein said each compressor is an axial flow compressor.
Claim 11
Dependent Claim
27 words
A multistage turbocompressor as set forth in claim 6 wherein said first compressor is an axial flow compressor and said second compressor is a radial flow compressor.
Claim 12
Dependent Claim
45 words
A multistage turbocompressor as set forth in claim 6 further comprising a means connected between said casing duct and said central duct for selectively introducing a variable amount of heated gas from said casing duct into the flow of cooled gas in said central duct.
Claim 13
Dependent Claim
139 words
A multistage turbocompressor comprising a compressor housing having an inlet and an outlet, a first plurality of compressor stages in said housing adjacent and downstream of said inlet to receive and compress a flow of gas to a first pressure, a cooler outside said housing for cooling the flow of compressed gas, a casing duct connected between said housing and said cooler for passing the flow of compressed gas to said cooler, a central duct concentric to said casing duct and connected between said cooler and said housing for passing the flow of cooled gas from said cooler to said housing downstream of said compressor stages, and a second plurality of compressor stages in said housing downstream of said first compressor stages and upstream of said outlet for compressing the flow of gas from said cooler and central duct.
Claim 14
Dependent Claim
139 words
A multistage turbocompressor comprising a compressor housing having an inlet and an outlet, a first plurality of compressor stages in said housing adjacent and downstream of said inlet to receive and compress a flow of gas to a first pressure, a cooler outside said housing for cooling the flow of compressed gas, a casing duct connected between said housing and said cooler for passing the flow of compressed gas to said cooler, a central duct concentric to said casing duct and connected between said cooler and said housing for passing the flow of cooled gas from said cooler to said housing downstream of said compressor stages, and a second plurality of compressor stages in said housing downstream of said first compressor stages and upstream of said outlet for compressing the flow of gas from said cooler and central duct.
References Cited (Backward Citations)
US2540991A
Cited
US2563745A
Cited
US2396484A
Cited
US2619279A
Cited
US2925954A
Cited
US3795458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |