Patent US3837657A successfully refreshed from Google Patents.
US3837657A
Expired / Lapsed
US
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Beaded gasket and method of using same
Assignee: FD FARNAM Inc
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Filing: 1972-08-07
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Granted: 1974-09-24
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Expires: 1992-08-07
Abstract
Abstract A gasket structure and the method of making the gasket structure, as well as the method of utilizing the gasket for effectively sealing incongruous mating surfaces, which is characterized by providing the gasket with an upstanding bead on one or both sides, the density of which is always less than that of the unbeaded portion to provide maximum compressibility with maximum sealing conformability. The gasket is further characterized by having the unbeaded portion having a density that is, or can be, tailored to provide a prepressed body portion that is more stable to uneven clamping pressures, thus minimizing distortion while having increased torque retention. Where greater heat insulating qualities may be required the gasket structure may be made from asbestos fiber millboard having a minimum amount of binder and with either type of gasket where additional sealing properties are desired the gasket structure may be provided with a coating layer that is cured to effect maximum sealing and protect the gasket from deleterious effects of the environment in which it is used.
Inventors
- 👤 R Farnam
- 👤 M Passarella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; F16J15/104; F16J15/108
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
150 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, fiber-reenforced compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having a body portion and an integral bead formed on at least one side of the gasket, the body portion throughout substantially the entire extent of the gasket structure, but exclusive of the bead, being of substantially uniform relatively high density, and the bead being of relatively low density and extending substantially around said passageway, said bead being spaced from said opening whereby the densified area includes substantially the entire area around said opening and around said bolt holes.
Claim 2
Dependent Claim
150 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, fiber-reenforced compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having a body portion and an integral bead formed on at least one side of the gasket, the body portion throughout substantially the entire extent of the gasket structure, but exclusive of the bead, being of substantially uniform relatively high density, and the bead being of relatively low density and extending substantially around said passageway, said bead being spaced from said opening whereby the densified area includes substantially the entire area around said opening and around said bolt holes.
Claim 3
Dependent Claim
21 words
A gasket structure as set forth in claim 1 in which the gasket structure has a metal facing on both sides.
Claim 4
Dependent Claim
21 words
A gasket structure as set forth in claim 1 in which the Gasket structure includes asbestos millboard having an inorganic binder.
Claim 5
Dependent Claim
34 words
A gasket structure as set forth in claim 3 in which thin metal facings are adhered to the millboard and the low density beads are formed in both the millboard and the metal facings.
Claim 6
Dependent Claim
42 words
A gasket structure as set forth in claim 1 in which the beads are in double rows and non-continuous and in which metal sheets are applied to both sides of the compactible material, with slots in the metal sheets outlining said beads.
Claim 7
Dependent Claim
34 words
A gasket structure as set forth in claim 1 in which the gasket structure is a laminate with the bead comprising a relatively soft compressible material interposed between the opposing sheets of the laminate.
Claim 8
Dependent Claim
96 words
A gasket structure as set forth in claim 1 wherein a coating is applied on the top and bottom surfaces of the gasket structure comprising a unitary and continuous layer of a thermosetting mixture of synthetic elastomer with synthetic resin, said coating providing the requisite sealing characteristics for closing voids remaining in relatively uncompressed areas and for protecting the gasket material from the deleterious effect of the environment in which the gasket is used and for effecting a fluid seal along the top and bottom surfaces when the gasket structure is clamped between said mating parts.
Claim 9
Dependent Claim
23 words
A gasket structure as set forth in claim 7 wherein a release coating covers said elastomer-resin coating on the top and bottom surfaces.
Claim 10
Dependent Claim
167 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, fiber-reenforced compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having at least 70 percent of its planar area compacted prior to application of the gasket structure, to a density at least 10 percent greater than the density of the gasket material prior to compression and having an integral bead surrounding at least a part of said opening, with the density of said bead being substantially equal to or less than the density of the gasket material prior to compression, said bead being spaced from said opening whereby said compacted or densified area includes substantially the entire area around said opening and around said bolt holes.
Claim 11
Dependent Claim
167 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, fiber-reenforced compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having at least 70 percent of its planar area compacted prior to application of the gasket structure, to a density at least 10 percent greater than the density of the gasket material prior to compression and having an integral bead surrounding at least a part of said opening, with the density of said bead being substantially equal to or less than the density of the gasket material prior to compression, said bead being spaced from said opening whereby said compacted or densified area includes substantially the entire area around said opening and around said bolt holes.
Claim 12
Dependent Claim
104 words
A gasket structure as set forth in claim 9 wherein a coating is applied on the top and bottom surfaces of the gasket structure and the interior walls of said openings comprising a unitary and continuous layer of a thermosetting mixture of synthetic elastomer with synthetic resin, said coating providing the requisite sealing characteristics for closing the voids remaining in relatively uncompressed areas and for protecting the gasket material from the deleterious effects of the environment in which the gasket is used and for effecting a fluid seal along the top and bottom surfaces when the gasket structure is clamped between said mating parts.
Claim 13
Dependent Claim
131 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having a body portion and a bead portion substantially surrounding said opening, but spaced therefrom, the bead portion being highly compressible and of relatively low density and the body portion constituting the remainder of the gasket structure and being of substantially uniform relatively high density and uniform thickness, said high density body portion Including substantially the entire area around said opening.
Claim 14
Dependent Claim
131 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having a body portion and a bead portion substantially surrounding said opening, but spaced therefrom, the bead portion being highly compressible and of relatively low density and the body portion constituting the remainder of the gasket structure and being of substantially uniform relatively high density and uniform thickness, said high density body portion Including substantially the entire area around said opening.
Claim 15
Dependent Claim
18 words
A gasket structure as set forth in claim 11 wherein the compactible material is a fiber reenforced elastomer.
Claim 16
Dependent Claim
23 words
A gasket structure as set forth in claim 11 in which the bead is integral with the body portion of the gasket structure.
Claim 17
Dependent Claim
104 words
A gasket structure as set forth in claim 11 wherein a coating is applied on the top and bottom surfaces of the gasket structure and the interior walls of said openings comprising a unitary and continuous layer of a thermosetting mixture of synthetic elastomer with synthetic resin, said coating providing the requisite sealing characteristics for closing the voids remaining in relatively uncompressed areas and for protecting the gasket material from the deleterious effect of the environment in which the gasket is used and for effecting a fluid seal along the top and bottom surfaces when the gasket structure is clamped between said mating parts.
Claim 18
Independent Claim
180 words
The method of effectively sealing mating surfaces of adjacent parts through which there is a passageway therebetween and in which the mating surfaces are subject to deformation under excessive clamping loads applied to bolts connecting the mating members, said method consisting of applying a gasket member between the mating members with an opening in the gasket corresponding to the passageway between the adjacent parts, said gasket being composed of compactible packing material which has been precompressed to a relatively high density such that when clamping loads are applied for clamping the mating members together with the gasket interposed therebetween the clamp load required for obtaining necessary torque retention of the bolt during use of the parts causes substantially no distortion of said mating members, said gasket also including an integral bead on one or both sides of the gasket and substantially surrounding the passageway, with the bead having substantially less density than the density of the precompressed body portion of the gasket, said gasket having substantially its entire area, except for the integral bead, of said precompresseed high density material.
Claim 19
Independent Claim
180 words
The method of effectively sealing mating surfaces of adjacent parts through which there is a passageway therebetween and in which the mating surfaces are subject to deformation under excessive clamping loads applied to bolts connecting the mating members, said method consisting of applying a gasket member between the mating members with an opening in the gasket corresponding to the passageway between the adjacent parts, said gasket being composed of compactible packing material which has been precompressed to a relatively high density such that when clamping loads are applied for clamping the mating members together with the gasket interposed therebetween the clamp load required for obtaining necessary torque retention of the bolt during use of the parts causes substantially no distortion of said mating members, said gasket also including an integral bead on one or both sides of the gasket and substantially surrounding the passageway, with the bead having substantially less density than the density of the precompressed body portion of the gasket, said gasket having substantially its entire area, except for the integral bead, of said precompresseed high density material.
Claim 20
Dependent Claim
202 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having a body portion and a bead portion substantially surrounding said opening, but spaced thereform, the bead portion being highly compressible and of relatively low density and the body portion constituting the remainder of the gasket structure and being of substantially uniform relatively high density and uniform thickness, said high density body portion including substantially the entire area around said opening, and a coating on one or both of the top and bottom surfaces of the gasket structure, said coating comprising a unitary and continuous layer of at least partially cured elastomer-resin formed from a thermosetting mixture of synthetic elastomer and synthetic resin with the mixture curing at a temperature within the range of 325* F and 400* F and having a thickness in the range of .0001 inch and .005 inch.
Claim 21
Dependent Claim
202 words
A gasket structure suitable for sealing mating parts together which include a passageway therebetween and in which the mating parts may present non-planar surfaces for sealing, said gasket structure being made of a homogeneous, compactible material and characterized by minute voids therein, said gasket structure including one or more bolt holes therethrough and an opening matching the passageway through the members which are to be clamped together, said gasket structure having a body portion and a bead portion substantially surrounding said opening, but spaced thereform, the bead portion being highly compressible and of relatively low density and the body portion constituting the remainder of the gasket structure and being of substantially uniform relatively high density and uniform thickness, said high density body portion including substantially the entire area around said opening, and a coating on one or both of the top and bottom surfaces of the gasket structure, said coating comprising a unitary and continuous layer of at least partially cured elastomer-resin formed from a thermosetting mixture of synthetic elastomer and synthetic resin with the mixture curing at a temperature within the range of 325* F and 400* F and having a thickness in the range of .0001 inch and .005 inch.
Claim 22
Dependent Claim
23 words
A gasket structure as set forth in claim 16 wherein a release coating covers said elastomer-resin coating on said top and bottom surfaces.
Claim 23
Dependent Claim
23 words
A gasket structure as set forth in claim 16 wherein said coating is applied on the interior aperture walls of the gasket structure.
Claim 24
Dependent Claim
46 words
A gasket structure as set forth in claim 16 wherein a coating is applied on the top and bottom surfaces of the gasket structure comprising a unitary and continuous layer of at least partially cured elastomer-resin formed from a mixture of synthetic elastomer and synthetic resin.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |