US3655210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High torque retention heat insulative gasket structure
Assignee: FD FARNAM Inc
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Filing: 1970-09-29
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Granted: 1972-04-11
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Expires: 1990-09-29
Abstract
Abstract A gasket structure permitting the selective variance of components thereof whereby high torque retention, heat insulating and fluid-tight sealing is obtained. The specific disclosure and application of use is in a gasket-heat-insulating assemblage for providing insulating and sealing functions between, for instance, the throttle body and bowl or the throttle body and the manifold of an internal combustion engine carburetor assembly. By increasing the density of the heat insulating member at the bolt hole portions by which the member is retained in the assemblage, as by means of densification or the provision of a suitable insert member, torque retention and the spring effect of the member may be controlled. Additionally, by providing gasket layer components on one or both sides of the insulating member, especially where one is furnished with a sealing band, fluidtight sealability in the intended field of use is maximized. Methods for forming specific specific constructions are also disclosed.
Inventors
- 👤 Robert G Farnam
- 👤 Michael T Passarella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/104; F02; F02M; F02M19/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
89 words
In a heat insulative gasket having a fluid passage-way therethrough and a bolt hole, said gasket comprising a body portion and a bolt hole portion, said bolt hole portion defining an area around the bolt hole of relatively high density, substantially non-compressible, material with a k factor in said bolt hole portion of about 3 or less, said body portion having at least portions thereof of relatively low density, compressible gasket material completely surrounding said fluid passageway and lying in a plane above that of said bolt hole portion.
Claim 2
Dependent Claim
89 words
In a heat insulative gasket having a fluid passage-way therethrough and a bolt hole, said gasket comprising a body portion and a bolt hole portion, said bolt hole portion defining an area around the bolt hole of relatively high density, substantially non-compressible, material with a k factor in said bolt hole portion of about 3 or less, said body portion having at least portions thereof of relatively low density, compressible gasket material completely surrounding said fluid passageway and lying in a plane above that of said bolt hole portion.
Claim 3
Dependent Claim
44 words
A heat insulative gasket as set forth in claim 1, in which said body portion comprises a core and a gasket layer adhered thereto with said gasket layer having an integral portion thereof constituting said relatively low density compressible material surrounding the fluid passageway.
Claim 4
Dependent Claim
23 words
A heat insulative gasket as set forth in claim 2 in which said integral elevated portion is in the form of a bead.
Claim 5
Dependent Claim
29 words
A heat insulative gasket as set forth in claim 1, in which the densified bolt hole portion is in the form of a bushing which includes a thermosetting resin.
Claim 6
Dependent Claim
22 words
A heat insulative gasket as set forth in claim 4, in which the bushing includes asbestos fiber reinforcement for the thermosetting resin.
Claim 7
Dependent Claim
25 words
A heat insulative gasket as set forth in claim 4, in which the busing is firmly mounted in a circular opening formed in the gasket.
Claim 8
Dependent Claim
126 words
A heat-insulative and fluid-sealing gasket structure comprising a heat-insulative member of selected thickness and configuration having a fluid opening and a plurality of spaced bolt holes therethrough, said bolt holes being larger than necessary to receive bolts and each having a non-metallic generally congruent annular insert member therein of high compressive strength and low thermal conductivity to form a sized bolt hole, and a layer of gasket material on each side of said heat-insulative member and having the same general configuration thereof and being secured to said member by an adhesive bond, and a continuous sealing bead on at least one of said gasket layers spaced from and surrounding said fluid opening with the top of the bead lying above the plane of the insert member.
Claim 9
Dependent Claim
126 words
A heat-insulative and fluid-sealing gasket structure comprising a heat-insulative member of selected thickness and configuration having a fluid opening and a plurality of spaced bolt holes therethrough, said bolt holes being larger than necessary to receive bolts and each having a non-metallic generally congruent annular insert member therein of high compressive strength and low thermal conductivity to form a sized bolt hole, and a layer of gasket material on each side of said heat-insulative member and having the same general configuration thereof and being secured to said member by an adhesive bond, and a continuous sealing bead on at least one of said gasket layers spaced from and surrounding said fluid opening with the top of the bead lying above the plane of the insert member.
Claim 10
Dependent Claim
28 words
A gasket structure in accordance with claim 7 wherein said heat-insulative member is of sufficient thickness to inhibit heat transmission between metal components in which it is used.
Claim 11
Dependent Claim
17 words
A gasket structure in accordance with claim 8 wherein said heat-insulative member is of thermosetting resin-impregnated fiberboard.
Claim 12
Dependent Claim
31 words
A gasket structure in accordance with claim 8 wherein said annular insert members are of less or substantially equal thickness with respect to the total sealing thickness of said gasket structure.
Claim 13
Dependent Claim
22 words
A gasket structure in accordance with claim 10 wherein said annular insert member comprises a plurality of laminations of resin-impregnated asbestos paper.
Claim 14
Dependent Claim
25 words
A gasket structure in accordance with claim 11 wherein said asbestos paper comprises long fibers of asbestos laid at right angles to said bolt openings.
Claim 15
Dependent Claim
15 words
A gasket structure in accordance with claim 12 wherein said resin is cured phenolic resin.
Claim 16
Dependent Claim
29 words
A gasket structure in accordance with claim 8 wherein said sealing bead is formed by a portion of said gasket layer having a density less than the remainder thereof.
Claim 17
Dependent Claim
39 words
A gasket structure in accordance with claim 14 wherein said sealing bead is substantially semi-circular in cross section and is of sufficient size to effectuate substantially fluid-tight sealing when said structure is clamped and used in its intended environment.
Claim 18
Dependent Claim
142 words
A gasket structure in accordance with claim 15 wherein a second gasket layer is provided on the opposite side of said heat-insulative member opposite said sealing bead. 17 A heat insulator gasket for carburEtors used in automotive engines and the like comprising a core member of fiberboard material, and gasket cover stock comprising elastomeric material bonded to the top and bottom faces of the core, said core and cover stock having a plurality of aligned openings therethrough for the reception of bolts, said bolt holes having the area immediately adjacent thereto characterized by having a density substantially greater than the density of the remainder of the gasket, at least one of said cover stock coverings having an elevated continuous bead lying in a plane above that of the densified bolt hole areas and located on and above said remainder of the gasket.
Claim 19
Dependent Claim
36 words
A gasket as set forth in claim 17 in which the densification in the area of the bolt holes comprises a non-metallic, highly densified, resin-impregnated and cured material having a heat-insulating factor less than about 3.
Claim 20
Dependent Claim
154 words
A heat insulator gasket for carburetors and the like comprising a core member carrying gasket members on the top and bottom surfaces thereof, and with bolt holes and a fluid port extending through the composite gasket, said gasket being characterized in that the gasket in the area of the bolt holes has a k factor less than about 3; the thickness of the gasket in such areas is greater than the thickness of the adjacent area of the gasket; a sealing bead is formed on one or both of the gasket members in the area of and surrounding said fluid port; and wherein the overall thickness of the gasket in the area of said sealing bead is slightly greater than that of the gasket at said bolt hole areas, whereby when the gasket is clamped between flanged members, an air space is provided between one of the flanged members and the adjacent gasket member.
Claim 21
Dependent Claim
154 words
A heat insulator gasket for carburetors and the like comprising a core member carrying gasket members on the top and bottom surfaces thereof, and with bolt holes and a fluid port extending through the composite gasket, said gasket being characterized in that the gasket in the area of the bolt holes has a k factor less than about 3; the thickness of the gasket in such areas is greater than the thickness of the adjacent area of the gasket; a sealing bead is formed on one or both of the gasket members in the area of and surrounding said fluid port; and wherein the overall thickness of the gasket in the area of said sealing bead is slightly greater than that of the gasket at said bolt hole areas, whereby when the gasket is clamped between flanged members, an air space is provided between one of the flanged members and the adjacent gasket member.
Claim 22
Dependent Claim
19 words
A gasket as set forth in claim 19 in which the core member is a cured, resin-impregnated, asbestos fiberboard.
Claim 23
Dependent Claim
22 words
A gasket as set forth in claim 19 in which the air space is approximately 0.005 inch to 0.010 inch in depth.
Claim 24
Dependent Claim
23 words
A gasket as set forth in claim 19 in which a sealing bead be provided on both the top nd bottom gasket members.
Claim 25
Dependent Claim
36 words
A gasket as set forth in claim 19 in which the free height of the sealing bead is selected to provide about 0.005 inch to about 0.007 inch compression when the flanged members are clamped together.
Claim 26
Dependent Claim
29 words
A gasket as set forth in claim 19 in which an additional protuberance is provided on one or both gasket members adjacent to the peripheral margin of the gasket.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |