US4720248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal barrier for submersible pump and motor assemblies
Assignee: Klein Schanzlin and Becker AG
•
Filing: 1984-04-27
•
Granted: 1988-01-19
•
Expires: 2004-04-27
Abstract
Abstract A thermal barrier which is interposed between the casing of a pump and the housing of a motor has a first section which resembles a spool and includes a first flange sealingly connected to the casing, a second flange sealingly connected to the housing and a hollow cylindrical core spacedly surrounding the pump shaft between the two flanges. The first section serves primarily or exclusively to establish a seal between the pump casing and the motor housing, and the thermal barrier has a second section which takes up stresses and further serves as a heat insulating and/or heat dissipating device. The second section is removably installed in the space between the two flanges of the first section and spacedly surrounds the core. The second section may be constituted by hollow cylindrical walls, one or more stacks of washers or rings, one or more annuli of parallel tubes, bars, rods, ribs or a combination of such elements. The original second section can be replaced with another second section exhibiting different heat-insulating properties and/or a different resistance to mechanical stresses when the conditions under which the pump and motor assembly is used change sufficiently to warrant replacement of the second section.
Inventors
- 👤 Robert Dernedde
- 👤 Hans-Joachim Franke
- 👤 Peter Havekost
- 👤 Christian Klepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:35
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/58; F04D29/586; F04D29/5893
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
158 words
A glandless circulating pump and motor assembly comprising: (a) a pump having a casing; (b) a motor having a housing which is spaced from said casing; (c) a pump shaft connected with said pump and said motor; and (d) a thermal barrier interposed between said casing and said housing, said barrier including a first section through which said shaft passes with clearance, and said first section having first and second portions which form respective seals with said casing and said housing, and a third portion which connects and is sealed to said first and second portions, said barrier further including a removably installed second section comprising a plurality of separable components, said second section being interposed between said first and second portions and at least partly surrounding said third portion, said second section being removable from between said first and second portions and being designed to impede heat transfer and transmit stresses between said casing and said housing.
Claim 2
Dependent Claim
158 words
A glandless circulating pump and motor assembly comprising: (a) a pump having a casing; (b) a motor having a housing which is spaced from said casing; (c) a pump shaft connected with said pump and said motor; and (d) a thermal barrier interposed between said casing and said housing, said barrier including a first section through which said shaft passes with clearance, and said first section having first and second portions which form respective seals with said casing and said housing, and a third portion which connects and is sealed to said first and second portions, said barrier further including a removably installed second section comprising a plurality of separable components, said second section being interposed between said first and second portions and at least partly surrounding said third portion, said second section being removable from between said first and second portions and being designed to impede heat transfer and transmit stresses between said casing and said housing.
Claim 3
Dependent Claim
15 words
The assembly of claim 1, wherein said second section comprises a plurality of separable components.
Claim 4
Dependent Claim
26 words
The assembly of claim 1, wherein said third portion is separably connected with at least one of said first and second portions of said first section.
Claim 5
Dependent Claim
25 words
The assembly of claim 1, wherein said third portion is integral with at least one of said first and second portions of said first section.
Claim 6
Dependent Claim
30 words
The assembly of claim 1, wherein said first section is a reel having two flanges constituted by said first and second portions and a core constituted by said third portion.
Claim 7
Dependent Claim
33 words
The assembly of claim 1, wherein said second section includes an annulus of discrete elongated elements, said annulus spacedly surrounding said third portion intermediate said first and second portions of said first section.
Claim 8
Dependent Claim
11 words
The assembly of claim 6, wherein said elongated elements are bars.
Claim 9
Dependent Claim
32 words
The assembly of claim 1, wherein said second section includes an annulus of discrete tubes, said annulus spacedly surrounding said third portion intermediate said first and second portions of said first section.
Claim 10
Dependent Claim
32 words
The assembly of claim 1, wherein said second section includes an annulus of discrete ribs, said annulus spacedly surrounding said third portion intermediate said first and second portions of said first section.
Claim 11
Dependent Claim
40 words
The assembly of claim 1, wherein said second section includes a plurality of tubular components including an inner tubular component spacedly surrounding said third portion of said first section and an outer tubular component spacedly surrounding said inner tubular component.
Claim 12
Dependent Claim
25 words
The assembly of claim 10, wherein said tubular components are cylindrical walls and said third portion is a hollow cylindrical core coaxial with said walls.
Claim 13
Dependent Claim
38 words
The assembly of claim 1, wherein said second section comprises a series of neighboring coaxial ring-shaped elements together constituting a substantially bellows-shaped envelope spacedly surrounding said third portion intermediate said first and second portions of said first section.
Claim 14
Dependent Claim
42 words
The assembly of claim 12, wherein said annular elements constitute several successive pairs of neighboring elements having abutting surfaces and the abutting surfaces of successive neighboring elements are alternately nearer to and more distant from said third portion of said first section.
Claim 15
Dependent Claim
22 words
The assembly of claim 1, wherein said second section comprises a plurality of coaxial cylindrical walls which are telescoped into each other.
Claim 16
Dependent Claim
55 words
The assembly of claim 14, wherein said walls include an inner wall, an intermediate wall and an outer wall, said intermediate wall abutting against said outer wall nearer to one of said first and second portions and against said inner wall nearer to the other of said first and second portions of said first section.
Claim 17
Dependent Claim
27 words
The assembly of claim 1, wherein said second section comprises at least one tubular element spacedly surrounding said third portion and having a plurality of apertures therein.
Claim 18
Dependent Claim
42 words
The assembly of claim 16, wherein said apertures are distributed in several rows, as considered circumferentially of said tubular element, and the apertures of neighboring rows are staggered with reference to each other, as considered in the circumferential direction of said element.
Claim 19
Dependent Claim
31 words
The assembly of claim 1, wherein said second section includes a plurality of elements which define at least one chamber with each other and with said portions of said first section.
Claim 20
Dependent Claim
15 words
The assembly of claim 18, further comprising a body of heat-insulating material in said chamber.
Claim 21
Dependent Claim
18 words
The assembly of claim 1, wherein at least a portion of said second section consists of heat-insulating material.
Claim 22
Dependent Claim
29 words
The assembly of claim 1, wherein said second section includes at least one element surrounding said third portion and at least one layer of heat-insulating material on said element.
Claim 23
Dependent Claim
31 words
The assembly of claim 1, further comprising a body of heat-insulating material interposed between said second section and at least one of said first and second portions of said first section.
Claim 24
Dependent Claim
26 words
The assembly of claim 1, wherein said second section defines at least one chamber; and further comprising means for circulating a fluid coolant through said chamber.
Claim 25
Dependent Claim
25 words
The assembly of claim 1, wherein said second section has at least one surface provided with unevennesses as to increase the area of such surface.
Claim 26
Dependent Claim
10 words
The assembly of claim 24, wherein said unevennesses include projections.
Claim 27
Dependent Claim
10 words
The assembly of claim 25, wherein said projections include ribs.
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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |