US4575306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry pump mechanical seal mounting assembly
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1984-08-28
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Granted: 1986-03-11
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Expires: 2004-08-28
Abstract
Abstract A mechanical seal mounting assembly for a centrifugal high solids concentration slurry pump is disclosed. A rotating seal ring adapter is secured to the pump's impeller drive shaft for rotation with the shaft. A stationary seal ring adapter is secured to a first end of a seal carrier which extends through the pump's back plate. A split gland ring is attached to a second end of the seal carrier and is supported by gland nuts threadedly carried on gland bolts. The gland bolts are attached to a bearing assembly for the pump shaft. Axial movement of the pump shaft to effect impeller clearance seal adjustment is possible without disturbing the mechanical seal adjustment. An O-ring is interposed between the pump back plate and the seal carrier and is held in place by an O-ring retainer secured to the back plate of the pump.
Inventors
- 👤 James A. Monnot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:38
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/126; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/344; F16J15/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
In a pump having an impeller rotatably driven by an axially moveable rotatable pump shaft supported by an axially adjustable bearing assembly and having a mechanical seal assembly including a rotatable seal ring adapter secured to and rotatable with the pump shaft and a stationary seal ring adapter attached to a first end of a cylindrical seal carrier which is sized to completely pass through a pump back plate, a mounting assembly for the seal carrier, said mounting assembly comprising: a split gland ring having spaced gland nut receiving apertures, said split gland ring having an inner peripheral portion engageable with a second end of the seal carrier; a gland nut having a central longitudinal threaded bore and being rotatably positioned in each of said gland nut receiving apertures; a gland bolt receivable in said central longitudinal threaded bore in each of said gland nuts and secured to the axially adjustable bearing assembly; and means for forming a stationary seal between the seal carrier and the pump back plate.
Claim 2
Dependent Claim
169 words
In a pump having an impeller rotatably driven by an axially moveable rotatable pump shaft supported by an axially adjustable bearing assembly and having a mechanical seal assembly including a rotatable seal ring adapter secured to and rotatable with the pump shaft and a stationary seal ring adapter attached to a first end of a cylindrical seal carrier which is sized to completely pass through a pump back plate, a mounting assembly for the seal carrier, said mounting assembly comprising: a split gland ring having spaced gland nut receiving apertures, said split gland ring having an inner peripheral portion engageable with a second end of the seal carrier; a gland nut having a central longitudinal threaded bore and being rotatably positioned in each of said gland nut receiving apertures; a gland bolt receivable in said central longitudinal threaded bore in each of said gland nuts and secured to the axially adjustable bearing assembly; and means for forming a stationary seal between the seal carrier and the pump back plate.
Claim 3
Dependent Claim
15 words
The mounting assembly of claim 1 wherein said split gland ring has two semicircular halves.
Claim 4
Dependent Claim
32 words
The mounting assembly of claim 1 wherein each of said gland nuts has an outer annular bearing surface which is adapted to be received in one of said gland nut receiving apertures.
Claim 5
Dependent Claim
38 words
The mounting assembly of claim 3 wherein each of said gland nuts further includes a nut at a first end of said bearing surface and an outwardly extending retaining flange at a second end of said bearing surface.
Claim 6
Dependent Claim
32 words
The mounting assembly of claim 4 wherein each of said gland bolts carries a jam nut which is engageable with said nut at said first end of each of said bearing surfaces.
Claim 7
Dependent Claim
45 words
The mounting assembly of claim 1 wherein said means for forming a stationary seal between the seal carrier and the pump back plate is an O-ring carried in an O-ring groove in an edge portion of the pump back plate which overlies the seal carrier.
Claim 8
Dependent Claim
29 words
The mounting assembly of claim 6 further including an O-ring retainer secured to the pump back plate and contacting said O-ring to compress said O-ring in said O-ring groove.
Claim 9
Dependent Claim
37 words
The mounting assembly of claim 1 wherein said inner peripheral portion of said split gland ring includes an inner peripheral boss, said boss being positionable in a circumferential groove at said second end of the seal carrier.
Claim 10
Dependent Claim
57 words
The mounting assembly of claim 8 wherein a lock pin aperture is provided in said inner peripheral boss, said lock pin aperture being adapted to receive a lock pin that passes through said second end of the seal carrier and into said lock pin aperture to prevent relative rotation between said gland ring and the seal carrier.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |