Patent US3894742A successfully refreshed from Google Patents.
US3894742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rope sealing means
Assignee: BP Chemicals Hitco Inc
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Filing: 1973-07-20
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Granted: 1975-07-15
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Expires: 1993-07-20
Abstract
Abstract A flexible, resilient, and deterioration-resistant seal is provided for use at high temperatures and pressures. A core of resilient mesh material is enveloped by covering means comprising inner and outer spirally wound strips of thin metallic foil. The inner strip comprises a spiral winding disposed upon the core, and the outer strip comprises a spiral winding disposed upon the inner strip core combination so that gaps left by the winding of the inner strip element are covered. The outer cover strip is affixed to the inner strip by a series of spot welds positioned so as to preserve flexibility of the seal in desired directions and to produce a desired shape of seal. The cover element may also comprise a single spiral winding disposed upon the core so as to leave related portions of the core exposed to fluid flow, thus maximizing resiliency of the seal. A method is provided for fabricating flexible, resilient seals comprising feeding a thin roll of mesh through an orifice in a conical mandrel, upon which is disposed a continuous winding of flexible cover material. As the mandrel rotates about its axis the mesh material is fed through, and the flexible material is wound thereon to form a cover.
Inventors
- 👤 Robert B Trelease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:37
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/021; F16J15/022; F16J15/06; F16J15/08; F16J15/0806; F16J15/0812; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12326; Y10T428/12333; Y10T428/12347; Y10T428/12444; Y10T428/12479
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
55 words
A flexible sealing device usable in conjunction with fluid flows at elevated temperatures and pressures without deterioration comprising: resilient core means; and, a covering element comprising a cover strip impermeable to fluid flow and disposed over at least portions of the core element and fastened thereto at a plurality of spaced-apart, substantially coplanar joinder points.
Claim 2
Dependent Claim
55 words
A flexible sealing device usable in conjunction with fluid flows at elevated temperatures and pressures without deterioration comprising: resilient core means; and, a covering element comprising a cover strip impermeable to fluid flow and disposed over at least portions of the core element and fastened thereto at a plurality of spaced-apart, substantially coplanar joinder points.
Claim 3
Dependent Claim
42 words
The invention as set forth in claim 1 wherein the cover strip comprises metallic foil disposed in a continuous spiral about the core element at a selected pitch to leave a selected proportion of the core element means exposed to fluid flow.
Claim 4
Dependent Claim
32 words
The invention as set forth in claim 2 wherein said core means is comprised of metallic mesh and the metallic foil is welded to the mesh at each of the joinder points.
Claim 5
Dependent Claim
66 words
The invention as set forth in claim 1 wherein the cover element includes a second cover strip, disposed over the first-mentioned cover strip and the core means so that substantially all of the core means is covered and fastened to the first-mentioned cover strip at a plurality of spaced-apart joinder points substantially coplanar with the joinder points between the first-mentioned cover means and the core element.
Claim 6
Dependent Claim
38 words
The invention as set forth in claim 1 wherein the cover strip has an arcuate contour and wherein the join points are substantially all included in a plane parallel to a plane perpendicularly intersecting the core element means.
Claim 7
Dependent Claim
60 words
A high temperature, high pressure, flexible rope seal comprising: a resilient, high-temperature resistant core; and a cover element comprising a first cover strip covering at least portions of said core and a second cover strip disposed upon the first cover strip and the core and joined to the first cover strip at a plurality of spaced-apart, substantially coplanar joinder points.
Claim 8
Dependent Claim
60 words
A high temperature, high pressure, flexible rope seal comprising: a resilient, high-temperature resistant core; and a cover element comprising a first cover strip covering at least portions of said core and a second cover strip disposed upon the first cover strip and the core and joined to the first cover strip at a plurality of spaced-apart, substantially coplanar joinder points.
Claim 9
Dependent Claim
34 words
The invention as set forth in claim 6 wherein the core has an arcuate shape and wherein the locus of the joinder points is substantially a line along the concave side of the core.
Claim 10
Dependent Claim
34 words
The invention as set forth in claim 6 whereiN the core has an arcuate contour and wherein the locus of the joinder points is substantially a line along the convex side of the core.
Claim 11
Dependent Claim
27 words
The invention as set forth in claim 8 wherein the core comprises a plurality of layers of wire mesh spirally wound into a generally cylindrical elongated shape.
Claim 12
Dependent Claim
60 words
A flexible seal comprising: a flexible core; a cover element including an inner cover means and an outer cover means disposed upon the core, the inner and outer cover means being slideable with respect to each other to permit deformation of the seal and being joined to each other at joinder points selectively positioned to provide flexibility in selected directions.
Claim 13
Dependent Claim
60 words
A flexible seal comprising: a flexible core; a cover element including an inner cover means and an outer cover means disposed upon the core, the inner and outer cover means being slideable with respect to each other to permit deformation of the seal and being joined to each other at joinder points selectively positioned to provide flexibility in selected directions.
Claim 14
Dependent Claim
67 words
The invention as set forth in claim 10 wherein the inner and outer cover means are spirally wound in a plurality of turns upon the core, and the joinder points have a locus of substantially two lines displaced at 180* from each other and are interrupted at alternate turns of the second cover means substantially symmetrically about the midpoint of each turn of the outer cover means.
Claim 15
Dependent Claim
40 words
The invention as set forth in claim 11 wherein the cover means are disposed so that the boundary edges of each turn of the outer cover means fall at approximately the midpoints of each turn of the outer cover means.
Claim 16
Dependent Claim
32 words
The invention as set forth in claim 10 wherein the first and second cover means are spirally wound upon the core, and the joinder points have a locus of substantially spiral shape.
Claim 17
Dependent Claim
29 words
The invention as set forth in claim 13 wherein the spiral locus of the joinder points traverses substantially equal angular displacements for every turn of the second cover means.
Claim 18
Dependent Claim
60 words
A seal comprising the combination of a resilient core comprised of mesh having a high resistance to deterioration due to high temperatures and pressures and wound into a generally cylindrical, elongated shape, and at least one cover element of material having a high resistance to deterioration due to high temperatures and pressures, the cover element being disposed upon the core.
Claim 19
Dependent Claim
60 words
A seal comprising the combination of a resilient core comprised of mesh having a high resistance to deterioration due to high temperatures and pressures and wound into a generally cylindrical, elongated shape, and at least one cover element of material having a high resistance to deterioration due to high temperatures and pressures, the cover element being disposed upon the core.
Claim 20
Dependent Claim
15 words
The invention as set forth in claim 15, wherein the mesh is made of metal.
Claim 21
Dependent Claim
17 words
The invention as set forth in claim 15, wherein the cover element is made of metal foil.
Claim 22
Dependent Claim
39 words
The invention as set forth in claim 15, wherein the mesh is made of metal, the cover element is made of metal foil, and the cover element is spot welded to the mesh at a plurality of spaced-apart points.
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |