GB2036199A - Gaskets - Google Patents
Gaskets Download PDFInfo
- Publication number
- GB2036199A GB2036199A GB7937645A GB7937645A GB2036199A GB 2036199 A GB2036199 A GB 2036199A GB 7937645 A GB7937645 A GB 7937645A GB 7937645 A GB7937645 A GB 7937645A GB 2036199 A GB2036199 A GB 2036199A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gasket
- eyelet
- body portion
- sealing material
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
- F16J15/123—Details relating to the edges of the packing
Abstract
A gasket has an eyelet attached to a flat body portion 1 and the eyelet includes primary (6) and secondary (2, 3) cooling zones. An annular seal of a rubber sealing material (9, 10) is deposited on the eyelet at least between the primary and secondary sealing zones. The seal of rubbery material may also extend over part or all of the secondary sealing portion of the eyelet and may extend on to the body portion. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to gaskets
The invention relates to gaskets, and in particular to gaskets of the kind in which apertures are provided with eyelets having primary and secondary sealing portions.
Gaskets are used for sealing joints between rigid bodies to prevent escape of gases or fluid from one or more cavities or passages in at least one of the bodies. The invention is primarily concerned with gaskets for sealing joints that are subject to heat and vibration, such as cylinder head joints in reciprocating internal combustion engines, particularly the engines of motor vehicles.
An object of the invention is to provide a form of gasket that can effectively withstand the cylinder pressures which arise in modern engines, and in particular provide an improved seal during the initial "bedding in" period in the early life of the engine and during gasket testing.
The invention is based on gaskets of the type wherein eyelets having primary and secondary sealing portions are used. A gasket of this kind is described and claimed in UK
Patent Specification No. 1,260,236 which provides a gasket comprising a flat body portion formed with an aperture, a primary sealing ring located within the aperture and attached to the body portion and secondary sealing means of flat annuli located on opposite faces of the body portion and extending into the aperture to provide attachment for the primary sealing ring, said annuli covering said faces of the body portion only in those regions adjacent the aperture.
According to the present invention there is provided a gasket comprising a flat body portion formed with an aperture, said aperture containing an eyelet attached to the edge of said flat body portion, the eyelet including primary and secondary sealing coaxial annular portions, wherein an annular seal of a rubber sealing material is deposited on said eyelet at least between said primary and secondary sealing portions.
The rubbery sealing material is a heat and chemical resistant material such as a silicone rubber. It may conveniently be provided also on the secondary sealing portion of the eyelet as a layer of thickness up to, for example, 0.1 mm.
In the gaskets described in UK Patent Specification No. 1,260,236 their construction results in a groove located between the primary and secondary sealing portions of the eyelet. In the present invention this groove is filled with the rubbery sealing material.
The rubbery sealing material is preferably applied to the gasket in a fluid state and subsequently set. A suitable method of application is the screen printing method. In this method a screen is used in which the design to be printed appears as areas of open mesh in the screen, the remainder of the screen being blanked. A quantity of curable liquid rubber composition is provided at one end of the screen and wiped across the screen by means of a squeegee in the usual manner of screen printing with the screen accurately superimposed on the gasket to be printed.
Liquid rubber passes through the screen only in the desired areas this providing a print on the gasket. The screen is then lifted away and the gasket removed, the rubber composition setting to form a sealing material.
The screen may be of a monofilament mesh such as nylon, polyester or steel, and the liquid rubber composition is preferably a curable composition e.g. an air-curing composition or a heat curable composition such as one containing a curing catalyst.
The body portion of the gasket may consist of any known gasket body material, such as copper or steel clad asbestos compound, compressed asbestos fibre compound or beaterprocessed asbestos or rubber material having a metallic core. The eyelet portion of the gasket will generally be of sheet metal, eg steel.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings of which:
Figure 1 is a sectional elevation of a portion of a gasket in accordance with the invention,
Figure 2 is a plan diagram of a portion of the gasket of Fig. 1, and
Figure 3 is a sectional elevation of an portion of a further gasket in accordance with the invention.
As shown in Fig. 1 the gasket consists of a body portion 1 and an eyelet which is constructed from sheet metal. The eyelet includes a pair of flat metal annuli 2, 3 on opposite faces of the body portion 1. Within an aperture in the body portion these annuli are brought together face to face to provide an annular flange 4 with one of the laminations of metal folded over the other to constitute a bead 5. This beaded flange provides a support for a primary sealing member 6 which is folded about the flange and constitutes the 2 and 3 constitute the secondary sealing portion and are each separated from the portion 6 by annular grooves 7 and 8.
A rubbery sealing material is deposited on both faces of the eyelet to form rubbery layers 9 and 10 filling the grooves 7 and 8 and extending over the secondary sealing portions onto the surface of the body member.
Fig. 2 shows in plan a part of the gasket including the whole of one eyelet and aperture, and part of another, as in a cylinder head gasket. The edges of the area of the gasket covered by a layer of rubbery sealing material 9 are indicated by unbroken lines.
The outer broken line shows the extent of the flat annulus 2 and the inner broken line shows the radially outer extent of the groove 7.
It will be appreciated that whilst the gasket shown in Fig. 2 has siamesed eyelets, this is not an essential feature.
The minimum requirement in the invention is that the rubbery sealing material should fill the grooves 7 and 8 in the eyelet. In the case illustrated by the drawings the rubber also extends over the secondary sealing portion of the eyelet, further enhancing the sealing capability of the resulting gasket.
In the gasket shown in Fig. 3 the gasket again consists of a body portion 11 and an eyelet which is constructed from sheet metal.
However, the eyelet is flat on one side, consisting of two metal annuli 1 2 and 1 3 and of which overlaps one surface of the body portion 11, the other overlapping the other surface of the body portion.
The metal annulus 1 2 is folded over on its inner edge, the fold being inside a corresponding fold of the annulus 13, both folds lying in the same direction forming a ring whose thickness is four layers of the metal sheet which constitutes a primary sealing portion of the gasket. The portions of the metal annuli 1 2 and 1 3 which override the body portion constitute the secondary portions of the eyelet, and there is a groove 1 6 on one side only of the gasket.
A rubbery sealing material is deposited on both faces of the gasket to form rubbery layers 14 and 15, layer 1 5 filling the groove 1 6 and both layers 1 4 and 1 5 extending over the secondary sealing portions of the eyelet onto the surface of the body portion 11 of the gasket.
Claims (9)
1. A gasket comprising a flat body portion formed with an aperture, said aperture containing an eyelet attached to the edge of said flat body portion, the eyelet including primary and secondary sealing coaxial annular portions, wherein an annular seal of a rubbery sealing material is deposited on said eyelet at least between said primary and secondary sealing portions.
2. A gasket as claimed in claim 1 in which on at least one face the primary and secondary sealing portions of the eyelet are separated by a groove and the groove is filled with said sealing material.
3. A gasket according to claim 1 or 2 in which the primary and secondary sealing portions of the eyelet are separated by a groove on both faces of the gasket, both grooves being filled with said sealing material.
4. A gasket according to claim 1 or 2 in which the eyelet is substantially flat on one side of the gasket.
5. A gasket according to any preceding claim in which the sealing material extends over at least part of the secondary sealing portion of the eyelet.
6. A gasket according to claim 5 in which the sealing material extends over the whole of the secondary portion of the eyelet and on to the flat body portion.
7. A gasket according to any preceding claim in which the eyelet comprises folded sheet metal.
8. A gasket according to any preceding claim in which the rubbery sealing material is a cured silicone rubber.
9. A gasket substantially as described herein with reference to, and as illustrated in,
Fig. 1 or 2 of the accompanying drawings.
1 0. A gasket substantially as described with reference to, and as illustrated in, Fig. 3 of the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7937645A GB2036199B (en) | 1978-11-03 | 1979-10-31 | Gaskets |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7843069 | 1978-11-03 | ||
GB7937645A GB2036199B (en) | 1978-11-03 | 1979-10-31 | Gaskets |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2036199A true GB2036199A (en) | 1980-06-25 |
GB2036199B GB2036199B (en) | 1983-02-16 |
Family
ID=26269438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7937645A Expired GB2036199B (en) | 1978-11-03 | 1979-10-31 | Gaskets |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2036199B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0152565A2 (en) * | 1983-12-08 | 1985-08-28 | Payen International Limited | Improvements in and relating to gaskets |
US4579372A (en) * | 1979-10-24 | 1986-04-01 | Smith International, Inc. | Flowline connector seal |
DE3727868A1 (en) * | 1987-08-21 | 1989-03-02 | Goetze Ag | Flat gasket made of soft material, particularly a cylinder head gasket |
-
1979
- 1979-10-31 GB GB7937645A patent/GB2036199B/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4579372A (en) * | 1979-10-24 | 1986-04-01 | Smith International, Inc. | Flowline connector seal |
EP0152565A2 (en) * | 1983-12-08 | 1985-08-28 | Payen International Limited | Improvements in and relating to gaskets |
EP0152565A3 (en) * | 1983-12-08 | 1985-10-30 | Payen International Limited | Improvements in and relating to gaskets |
DE3727868A1 (en) * | 1987-08-21 | 1989-03-02 | Goetze Ag | Flat gasket made of soft material, particularly a cylinder head gasket |
Also Published As
Publication number | Publication date |
---|---|
GB2036199B (en) | 1983-02-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |