Patent US5763973A successfully refreshed from Google Patents.
US5763973A
Expired / Lapsed
US
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Composite barrier can for a magnetic coupling
Assignee: IMO Industries Inc
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Filing: 1996-10-30
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Granted: 1998-06-09
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Expires: 2016-10-30
Abstract
Abstract A composite barrier can and method of making same for use with industrial magnetic drive pumps. The barrier can is used to prevent leakage between the inner magnet assembly attached to the pump and the outer magnet assembly attached to the pump drive or motor. The barrier can is a non-metallic, composite barrier can composed of fiber and resin and includes a pole piece. The nonmetallic material and high strength configuration of the composite barrier can permits pump operation at high speeds and pressures with negligible eddy current generation. Using the composite barrier can results in minimizing heat developed in the coupling area and minimizing horsepower required from the motor. A resistance temperature detector is operatively positioned on the exterior of or within the fiber layer of the can such that the sensing portion of the detector is located proximate the closed end of the can. A method of manufacturing the barrier can is also disclosed.
Inventors
- 👤 Margaret D. Cramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; H02K49/106; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/025; F04C; F04C15/00; F04C15/0057; F04C15/0061; F04C15/0069; H02K11/00; H02K5/00; H02K5/04; H02K5/12; H02K5/128
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
57 words
A magnetic barrier can having an open end and a closed end, the can comprising: a spool piece; and an open ended cylinder having an inner surface and an outer surface, operatively connected to the spool piece, the cylinder including a resin coated fiber, the resin coated fiber covering the spool piece to form the closed end.
Claim 2
Dependent Claim
57 words
A magnetic barrier can having an open end and a closed end, the can comprising: a spool piece; and an open ended cylinder having an inner surface and an outer surface, operatively connected to the spool piece, the cylinder including a resin coated fiber, the resin coated fiber covering the spool piece to form the closed end.
Claim 3
Dependent Claim
20 words
The can of claim 1 wherein the fiber is selected from the group comprising: graphite fiber, Kevlar fiber and fiberglass.
Claim 4
Dependent Claim
13 words
The can of claim 1 wherein the resin is a multifunctional thermoset resin.
Claim 5
Dependent Claim
28 words
The can of claim 1 further comprising: a thick region, operatively positioned proximate the open end of the cylinder distal from the spool piece, for forming a stop.
Claim 6
Dependent Claim
28 words
The can of claim 4 further comprising: a flange, operation positioned between the opened end and the spool piece, for mounting the can to a magnetic drive pump.
Claim 7
Dependent Claim
19 words
The can of claim 5 wherein the flange is positioned proximate the stop and is held in position thereby.
Claim 8
Dependent Claim
20 words
The can of claim 1 further comprising: a fiberless inner layer for preventing contact between the pumpage and the fiber.
Claim 9
Dependent Claim
30 words
The can of claim 1 further comprising: a resistant temperature detector operatively positioned such that the sensing area of the detector is located proximate the closed end of the can.
Claim 10
Dependent Claim
31 words
The can of claim 8 wherein the sensing area of the detector is located in the third of the cylindrical portion of the can nearest the closed end of the can.
Claim 11
Dependent Claim
21 words
The can of claim 8 wherein the sensing area of the detector is located on the outer surface of the can.
Claim 12
Dependent Claim
23 words
The can of claim 8 wherein the sensing area of the detector is embedded within the plurality of layers of resin coated fiber.
Claim 13
Dependent Claim
108 words
A magnetic coupling driven pump comprising: a housing having an inlet and an outlet; a pumping mechanism operatively positioned inside the housing; a magnetic drive coupling, operatively positioned proximal the pumping mechanism, for operatively connecting the pumping mechanism to a drive mechanism; and a barrier can having an open end and a closed end operatively positioned within the magnetic drive coupling, the magnetic barrier can comprising: a spool piece; and an open ended cylinder having an inner surface and an outer surface, operatively connected to the spool piece, the cylinder including a resin coated fiber, the resin coated fiber covering the spool piece to form the closed end.
Claim 14
Dependent Claim
108 words
A magnetic coupling driven pump comprising: a housing having an inlet and an outlet; a pumping mechanism operatively positioned inside the housing; a magnetic drive coupling, operatively positioned proximal the pumping mechanism, for operatively connecting the pumping mechanism to a drive mechanism; and a barrier can having an open end and a closed end operatively positioned within the magnetic drive coupling, the magnetic barrier can comprising: a spool piece; and an open ended cylinder having an inner surface and an outer surface, operatively connected to the spool piece, the cylinder including a resin coated fiber, the resin coated fiber covering the spool piece to form the closed end.
Claim 15
Dependent Claim
25 words
The pump of claim 12 wherein the fiber for the magnetic barrier can is selected from the group comprising: graphite fiber, Kevlar fiber and fiberglass.
Claim 16
Dependent Claim
13 words
The pump of claim 12 wherein the resin is a multifunctional thermoset resin.
Claim 17
Dependent Claim
33 words
The pump of claim 12 wherein the magnetic barrier can further comprises: a thick region, operatively positioned proximate the open end of the cylinder distal from the spool piece, for forming a stop.
Claim 18
Dependent Claim
19 words
The pump of claim 15 wherein the flange is positioned proximate the stop and is held in position thereby.
Claim 19
Dependent Claim
24 words
The pump of claim 12 wherein the magnetic barrier can further comprises: a fiberless inner layer for preventing contact between pumpage and the fiber.
Claim 20
Dependent Claim
37 words
The pump of claim 12 wherein the magnetic barrier can further comprises: a resistant temperature detector operatively positioned such that the sensing area of the detector is located proximate the closed end of the magnetic barrier can.
Claim 21
Dependent Claim
33 words
The pump of claim 18 wherein the sensing area of the detector is located in the third of the cylindrical portion of the can nearest the closed end of the magnetic barrier can.
Claim 22
Dependent Claim
23 words
The pump of claim 18 wherein the sensing area of the detector is located on the outer surface of the magnetic barrier can.
Claim 23
Dependent Claim
23 words
The pump of claim 18 wherein the sensing area of the detector is embedded within the plurality of layers of resin coated fiber.
Claim 24
Dependent Claim
14 words
The pump of claim 12 wherein the pumping mechanism comprises: a rotary screw mechanism.
Claim 25
Dependent Claim
12 words
The pump of claim 12 wherein the pumping mechanism comprises: an impeller.
Claim 26
Dependent Claim
11 words
The pump of claim 12 wherein the pumping mechanism comprises: gears.
Claim 27
Dependent Claim
30 words
(Amended) The pump of claim 22 wherein the rotary screw mechanism further comprises: a power screw operatively connected to the drive mechanism external to the pump; and two idler rotors.
Claim 28
Dependent Claim
26 words
The pump of claim 12 further comprising: a flange, operatively connected to the magnetic coupling, for operatively connecting the magnetic drive coupling to the pumping mechanism.
Claim 29
Dependent Claim
48 words
The pump of claim 12 wherein the magnetic coupling further comprises: an inner magnet assembly, operatively positioned inside the magnetic barrier can and operatively connected to the pumping mechanism; and an outer magnet assembly operatively positioned outside the magnetic barrier can and operatively connected to the drive mechanism.
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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) | 2001-06-08 | 2001-12-08 | 2002-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-08 | 2005-12-08 | 2006-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-08 | 2009-12-08 | 2010-06-09 | $7700.00 | Window Closed / Lapsed |