Patent US3856430A successfully refreshed from Google Patents.
US3856430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser with boundary layer removal
Assignee: Motors Liquidation Co
•
Filing: 1973-07-27
•
Granted: 1974-12-24
•
Expires: 1993-07-27
Abstract
Abstract A diffuser for a radial flow compressor has a body defining radially and tangentially extending diffusing passages from near the compressor rotor into a plenum surrounding the diffuser body. A curved diverging outlet tube is mounted in a socket at the outer end of each diffusing passage. A slot extending around the diffusing passage at the inner end of each outlet tube receives boundary layer air from the passage and directs it into a recess on the exterior of the outlet tube. All these recesses are connected to a common manifold from which the boundary layer air is directed to any suitable receiver.
Inventors
- 👤 S Langham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:46
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D29/66; F04D29/68; F04D29/681; F04D29/682; Y; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket; the diffuser body defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; means defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.
Claim 2
Dependent Claim
108 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket; the diffuser body defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; means defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.
Claim 3
Dependent Claim
126 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser definIng a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; meens defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.
Claim 4
Dependent Claim
126 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser definIng a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; meens defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.
Claim 5
Dependent Claim
131 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.
Claim 6
Dependent Claim
131 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.
Claim 7
Dependent Claim
150 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.
Claim 8
Dependent Claim
150 words
A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.
References Cited (Backward Citations)
US2084463A
Cited
US2656096A
Cited
US2709917A
Cited
GB1043168A
Cited
US3333762A
Cited
US3420435A
Cited
US3768919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |