Patent US5484267A successfully refreshed from Google Patents.
US5484267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for a pump and corresponding barrier tank
Assignee: STEJADA Corp
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Filing: 1994-03-17
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Granted: 1996-01-16
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Expires: 2014-03-17
Abstract
Abstract A centrifugal pump system including a pump having a rotating seal disposed therein, the temperature of the seal being substantially maintained at an acceptable level by circulating a temperature stabilizing liquid to and from a chamber arranged immediately adjacent the rotating seal. A cooling or barrier tank is positioned adjacent the pump, the cooling tank for receiving the temperature stabilizing liquid from the chamber, allowing it to cool, and directing it back into the chamber thereby maintaining the temperature of the liquid adjacent the rotating seal at a substantially constant and acceptable level. A blower or fan is positioned adjacent both the pump and the cooling tank so as to simultaneously blow air across both of them in order to maintain the temperatures of the pump motor, the liquid within the cooling tank, and the rotating seal at acceptable levels.
Inventors
- 👤 Robert E. Rockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:52
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3448; F16J15/3404; Y; Y10; Y10S; Y10S277/00; Y10S277/93; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
195 words
A pump system comprising: a motor for rotating a pump shaft within a pump; a fluid pumping impeller coupled to said pump shaft, said impeller for pumping a fluid from a fluid inlet to a fluid outlet defined in said pump; a rotating fluid seal disposed within said pump; a temperature stabilizing chamber adjacent said rotating seal, said chamber housing a temperature stabilizing fluid for maintaining said seal at a substantially constant and acceptable temperature; a conduit system for circulating said temperature stabilizing fluid from said chamber to a fluid cooling tank remote from said seal, and thereafter back to said chamber from said tank; a blower affixed adjacent said pump by way of a cowl, said cowl being disposed between said blower and said motor; said blower for simultaneously blowing air across both said motor and said tank so as to cool each of said motor and the temperature stabilizing fluid in said tank, the result being that said seal is maintained at a substantially constant and acceptable temperature as said temperature stabilizing fluid is circulated back into said chamber adjacent said seal after being cooled by said blower while in said cooling tank.
Claim 2
Dependent Claim
195 words
A pump system comprising: a motor for rotating a pump shaft within a pump; a fluid pumping impeller coupled to said pump shaft, said impeller for pumping a fluid from a fluid inlet to a fluid outlet defined in said pump; a rotating fluid seal disposed within said pump; a temperature stabilizing chamber adjacent said rotating seal, said chamber housing a temperature stabilizing fluid for maintaining said seal at a substantially constant and acceptable temperature; a conduit system for circulating said temperature stabilizing fluid from said chamber to a fluid cooling tank remote from said seal, and thereafter back to said chamber from said tank; a blower affixed adjacent said pump by way of a cowl, said cowl being disposed between said blower and said motor; said blower for simultaneously blowing air across both said motor and said tank so as to cool each of said motor and the temperature stabilizing fluid in said tank, the result being that said seal is maintained at a substantially constant and acceptable temperature as said temperature stabilizing fluid is circulated back into said chamber adjacent said seal after being cooled by said blower while in said cooling tank.
Claim 3
Dependent Claim
46 words
The pump system of claim 1, wherein said motor is housed within a motor housing and said blower blows air across the exterior periphery or surface of said housing so as to stabilize the temperature of said motor, and said temperature stabilizing fluid is a liquid.
Claim 4
Dependent Claim
30 words
The pump system of claim 2, wherein said pump is environmentally safe with said motor housing being sealingly affixed to a pump housing so as to hermetically seal said pump.
Claim 5
Dependent Claim
53 words
The pump system of claim 3, wherein said motor housing has a plurality of elongated axially extending guide fins disposed in its radially outer periphery, said fins for guiding said air blown by said blower across said motor housing so as to substantially maintain the temperature of said motor at an acceptable level.
Claim 6
Dependent Claim
21 words
The pump system of claim 3, wherein said blower blows said air across both said motor housing and said pump housing.
Claim 7
Dependent Claim
41 words
The pump system of claim 1, wherein said cowl includes a baffle for splitting the air blown by said blower into first and second portions, said first portion flowing across said motor and said second portion flowing across said cooling tank.
Claim 8
Dependent Claim
50 words
The pump system of claim 6, wherein said first portion of air flows through a portion of said cowl encircling an end of said motor, and said second portion of air blown by said blower flows through a portion of said cowl surrounding a part of said fluid cooling tank.
Claim 9
Dependent Claim
64 words
The pump system of claim 1, wherein said tank has a liquid level sensor disposed therein for determining the level of temperature stabilizing fluid in said tank, said system further comprising an alarm coupled to said liquid level sensor for halting operation of said pump if the fluid level in said tank drops below a predetermined point, said temperature stabilizing fluid being a liquid.
Claim 10
Dependent Claim
38 words
The pump system of claim 8, further comprising means for introducing an inert gas under pressure into said tank so as to maintain the pressure within said tank and said chamber adjacent said seal at a certain level.
Claim 11
Dependent Claim
93 words
The pump system of claim 1, wherein said tank includes an in-flow port and an out-flow port connected to said conduit system, said in-flow port for receiving said temperature stabilizing fluid from said chamber and said out-flow port for delivering cooled temperature stabilizing fluid back into said chamber in order to maintain the temperature of said seal at a substantially constant acceptable temperature, said temperature stabilizing fluid being a liquid; and wherein said temperature stabilizing fluid is forced from said chamber by a plurality of pumping vanes disposed on a rotating sealing flange.
Claim 12
Dependent Claim
25 words
The pump system of claim 10, wherein said temperature stabilizing fluid is one of: (i) water; (ii) mineral oil; (iii) glycol; and (iv) combinations thereof.
Claim 13
Dependent Claim
18 words
The pump system of claim 10, wherein said tank is positioned vertically above said blower and said pump.
Claim 14
Dependent Claim
40 words
The pump system according to claim 1, further comprising a second temperature stabilizing chamber adjacent a second rotating seal, said second chamber in communication with a second fluid cooling tank, said blower also cooling said fluid in said second tank.
Claim 15
Independent Claim
206 words
A method of stabilizing the temperature of a rotating seal disposed within a centrifugal pump at an acceptable level, said method comprising the steps of: a) providing in said pump a shaft for rotating a fluid pumping impeller; b) driving said shaft by way of a motor affixed to said pump; c) providing a rotating seal within said pump for preventing the fluid being pumped by said impeller from leaking axially along said shaft toward said motor; d) providing a temperature stabilizing chamber adjacent said rotating seal for maintaining the temperature of said rotating seal at an acceptable level; e) circulating a temperature stabilizing liquid from said chamber to a barrier tank; f) heating or cooling said temperature stabilizing liquid while said liquid is in said barrier tank; g) circulating said stabilized (i.e. heated or cooled) liquid back into said temperature stabilizing chamber adjacent said seal from said barrier tank so as to maintain the temperature of the liquid in said chamber and thus said adjacent seal at a substantially constant and acceptable level; and h) cooling said motor and cooling or heating said temperature stabilizing liquid within said tank by using a blower to simultaneously blow air across both said barrier tank and said motor.
Claim 16
Independent Claim
206 words
A method of stabilizing the temperature of a rotating seal disposed within a centrifugal pump at an acceptable level, said method comprising the steps of: a) providing in said pump a shaft for rotating a fluid pumping impeller; b) driving said shaft by way of a motor affixed to said pump; c) providing a rotating seal within said pump for preventing the fluid being pumped by said impeller from leaking axially along said shaft toward said motor; d) providing a temperature stabilizing chamber adjacent said rotating seal for maintaining the temperature of said rotating seal at an acceptable level; e) circulating a temperature stabilizing liquid from said chamber to a barrier tank; f) heating or cooling said temperature stabilizing liquid while said liquid is in said barrier tank; g) circulating said stabilized (i.e. heated or cooled) liquid back into said temperature stabilizing chamber adjacent said seal from said barrier tank so as to maintain the temperature of the liquid in said chamber and thus said adjacent seal at a substantially constant and acceptable level; and h) cooling said motor and cooling or heating said temperature stabilizing liquid within said tank by using a blower to simultaneously blow air across both said barrier tank and said motor.
Claim 17
Dependent Claim
48 words
The method of claim 14, further comprising the step of: i) disposing a cowl between said blower and said motor, said cowl dividing the air blown by said blower into two portions, one portion being blown across said motor and the other portion being blown across said tank.
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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) | 1999-01-15 | 1999-07-17 | 2000-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-15 | 2003-07-17 | 2004-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-15 | 2007-07-17 | 2008-01-16 | $7700.00 | Window Closed / Lapsed |