US3680976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump having leakage collection and draining means
Assignee: Ingersoll Rand Co
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Filing: 1970-12-14
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Granted: 1972-08-01
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Expires: 1990-12-14
Abstract
Abstract A centrifugal pump in which the hub portion of the casing cover is provided with a liquid leakage collecting channel having a recessed portion communicating through a drainage outlet with a conduit discharging liquid collected in the channnel. Also, the side face of the casing cover external to the pumping chamber slopes downwardly towards its periphery for facilitating collection of liquid at the periphery; and a drainage conduit communicates with such periphery for removing the collected liquid.
Inventors
- 👤 Frederic W Buse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:32
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D15/00; F04D15/0077; F04D29/08; F04D29/10; F04D29/106; F05; F05D; F05D2260/00; F05D2260/60; F05D2260/602; F05D2260/6022
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
199 words
In a centrifugal pump adapted to be generally vertically mounted, a casing containing a pumping chamber and having inlet and discharge ports connected to said pumping chamber, a casing cover mounted on said casing and having a side face bounding one side of the pumping chamber and an opposite side face external to said pumping chamber, said casing cover including a central hub portion projecting from its said opposite side face, a rotatable shaft extending through said hub portion of said casing cover, an said pumping chamber mounted on said shaft, sealing means in said hub portion around said shaft for restricting leakage from said pumping chamber through said hub portion, said hub portion having a collar therearound and said collar including a collecting channel extending around said shaft, said collecting channel including a portion recessed from another poRtion thereof, outlet means communicating with said recessed portion of said collecting channel for draining liquid therefrom, said opposite side face of said casing cover sloping downwardly from said hub portion towards its outer periphery to facilitate liquid drainage theretowards, and outlet means communicating with the outer periphery of said opposite side face of said casing cover for draining liquid therefrom.
Claim 2
Dependent Claim
199 words
In a centrifugal pump adapted to be generally vertically mounted, a casing containing a pumping chamber and having inlet and discharge ports connected to said pumping chamber, a casing cover mounted on said casing and having a side face bounding one side of the pumping chamber and an opposite side face external to said pumping chamber, said casing cover including a central hub portion projecting from its said opposite side face, a rotatable shaft extending through said hub portion of said casing cover, an said pumping chamber mounted on said shaft, sealing means in said hub portion around said shaft for restricting leakage from said pumping chamber through said hub portion, said hub portion having a collar therearound and said collar including a collecting channel extending around said shaft, said collecting channel including a portion recessed from another poRtion thereof, outlet means communicating with said recessed portion of said collecting channel for draining liquid therefrom, said opposite side face of said casing cover sloping downwardly from said hub portion towards its outer periphery to facilitate liquid drainage theretowards, and outlet means communicating with the outer periphery of said opposite side face of said casing cover for draining liquid therefrom.
Claim 3
Dependent Claim
26 words
A centrifugal pump according to claim 1, wherein said periphery of said opposite side face of said casing cover is provided with a generally upstanding rim.
Claim 4
Dependent Claim
29 words
A centrifugal pump according to claim 1, further comprising a plate detachably mounted to said casing bounding the side of said pumping chamber opposite to said one side thereof.
Claim 5
Dependent Claim
28 words
A centrifugal pump according to claim 3, wherein said plate is generally annular and said inlet port communicates with said pumping chamber through the opening in said plate.
Claim 6
Dependent Claim
35 words
A centrifugal pump according to claim 1, wherein said side face of said casing cover bounding one side of the pumping chamber slopes downwardly from said hub portion of said casing cover towards its periphery.
Claim 7
Dependent Claim
145 words
In a centrifugal pump adapted to be generally vertically mounted, a casing containing a pumping chamber and having inlet and discharge ports connected to said pumping chamber, a casing cover mounted on said casing and having a side face bounding one side of the pumping chamber and an opposite side face external to said pumping chamber, said casing cover being provided with a central hub external to said pumping chamber, a rotatable shaft extending through said central hub, an impeller in said pumping chamber mounted on said shaft, sealing means contained in said central hub around said shaft to restrict fluid flow from said pumping chamber through said central hub, said central hub being provided with a recessed collecting channel for receiving and collecting liquid passing from said pumping chamber through said central hub, and means communicating with said collecting channel for draining liquid therefrom.
Claim 8
Dependent Claim
145 words
In a centrifugal pump adapted to be generally vertically mounted, a casing containing a pumping chamber and having inlet and discharge ports connected to said pumping chamber, a casing cover mounted on said casing and having a side face bounding one side of the pumping chamber and an opposite side face external to said pumping chamber, said casing cover being provided with a central hub external to said pumping chamber, a rotatable shaft extending through said central hub, an impeller in said pumping chamber mounted on said shaft, sealing means contained in said central hub around said shaft to restrict fluid flow from said pumping chamber through said central hub, said central hub being provided with a recessed collecting channel for receiving and collecting liquid passing from said pumping chamber through said central hub, and means communicating with said collecting channel for draining liquid therefrom.
Claim 9
Dependent Claim
15 words
A centrifugal pump according to claim 6, wherein said collecting channel surrounds said central hub.
Claim 10
Dependent Claim
30 words
A centrifugal pump according to claim 6, wherein said collecting channel includes a portion deeper recessed than another portion thereof, said draining means being connected to said deeper recessed portion.
Claim 11
Dependent Claim
141 words
In a centrifugal pump adapted to be generally vertically mounted, a casing containing a pumping chamber and having inlet and discharge ports connected to said pumping chamber, a casing cover mounted on said casing and having a side face bounding one side of the pumping chamber and an opposite side face external to said pumping chamber, said casing cover having a central hub portion external to said pumping chamber, a rotatable shaft projecting through said hub portion of said casing cover, an impeller in said pumping chamber mounted on said shaft, sealing means in said hub portion around said shaft for restricting liquid flow from said pumping chamber through said hub portion, said opposite side face of said casing cover sloping downwardly towards its periphery, and drainage means communicating with the periphery of said opposite side face for draining liquid therefrom.
Claim 12
Dependent Claim
141 words
In a centrifugal pump adapted to be generally vertically mounted, a casing containing a pumping chamber and having inlet and discharge ports connected to said pumping chamber, a casing cover mounted on said casing and having a side face bounding one side of the pumping chamber and an opposite side face external to said pumping chamber, said casing cover having a central hub portion external to said pumping chamber, a rotatable shaft projecting through said hub portion of said casing cover, an impeller in said pumping chamber mounted on said shaft, sealing means in said hub portion around said shaft for restricting liquid flow from said pumping chamber through said hub portion, said opposite side face of said casing cover sloping downwardly towards its periphery, and drainage means communicating with the periphery of said opposite side face for draining liquid therefrom.
Claim 13
Dependent Claim
29 words
A centrifugal pump according to claim 9, further comprising a plate detachably mounted to said casing bounding the side of said pumping chamber opposite to said one side thereof.
Claim 14
Dependent Claim
28 words
A centrifugal pump according to claim 9, wherein said plate is generally annular and said inlet port communicates with said pumping chamber through the opening in said plate.
Claim 15
Dependent Claim
39 words
A centrifugal pump according to claim 1, wherein said outlet means in communication with said recessed portion of said collecting channel comprises an outlet through a wall of said collecting channel and a drainage conduit connected at said outlet.
Claim 16
Dependent Claim
29 words
A centrifugal pump according to claim 6, wherein said liquid draining means comprises an outlet through a wall of said channel and a drainage conduit connected at said outlet.
Claim 17
Dependent Claim
58 words
A centrifugal pump according to claim 6, wherein said collecting channel includes a portion deeper recessed than another portion thereof, said liquid drainage means is connected to said collecting channel at said deeper recessed portion thereof, and said liquid draining means comprises an outlet through a wall of said channel and a drainage conduit connected at said outlet.
Claim 18
Dependent Claim
24 words
A centrifugal pump according to claim 14, wherein said outlet communicates with said deeper recessed portion adjacent the bottom of said deeper recessed portion.
Claim 19
Dependent Claim
26 words
A centrifugal pump according to claim 9, wherein said periphery of said opposite side face of said casing cover is provided with a generally upstanding rim.
Claim 20
Dependent Claim
18 words
A centrifugal pump according to claim 16, wherein said drainage means comprises a drainage outlet through said rim.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |