JPH02221769A - Manufacture of insert for gasket and gasket assembly - Google Patents

Abstract

PURPOSE: To securely seal an insert with an inexpensive structure by providing a pair of first and second flanges extended outward from the peripheral part of the insert and engaged in a sealed condition with the surface on the one side and with the surface on the opposite surface of a sheet consisting of a gasket material. CONSTITUTION: A gasket assembly 10 constituted as an adjusting device of an exhaust gas circulating system is made up of a gasket member 12 consisting of a graphite compound material reinforced by stainless steel 20, and an insert 14 of stainless structure fitted in the circular hole 22 at the center thereof. The insert 14 is provided with a pair of flanges 26a, 26b extended from a center hole 16 of a prescribed dimensions in the radial direction, and a pair of circular flanges 28a, 28b extended in the axial direction, and a formed part 36 inclined for enhancing the strength around the center hole 16 is formed. Then, the insert 14 is fitted in the central hole 22 of the gasket 12, and the flanges 26a, 26b are engaged with the surface 32 on one side and the flanges 28a 28b are downwardly caulked against the surface 30 on the other side to be brought into contact with each other, and are sealed respectively. In this manner, the insert can be inexpensively constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates generally to gasket assemblies, and more particularly to inserts that fit within holes in standard-sized gaskets.

BACKGROUND OF THE INVENTION The insert can function as a baffle plate that completely blocks the hole in the gasket, or as an adjustment device that creates a hole of a predetermined size that precisely controls the flow of the flowing fluid.

Traditionally, gasket manufacturers have produced gaskets of standardized construction and have modified these through the use of gasket accessories or inserts so that a single gasket construction can be used in multiple different applications. Fixed the gasket.

Gasket accessories are used to completely or partially occlude an opening in a standard size gasket or to provide an additional sealing surface extending from the gasket.

The use of these gasket accessories can substantially reduce associated manufacturing costs.

Examples of inserts for gaskets that can be used to partially reduce the opening through the hole in the gas get are described in U.S. Pat. Nos. 4.126.318 and 4.405.138 It is. Examples of gasket inserts that can be used to completely close gasket hole openings are described in U.S. Pat. No. 4,405,486 and U.S. Pat. No. 4,534,572.

SUMMARY OF THE INVENTION The present invention relates to an integral diverting/regulating insert utilized to prevent or partially restrict fluid flow through a hole formed in a gasket. The present invention also relates to a unique method of securing inserts within cooperating gasket holes. A preferred embodiment of the invention provides an insert for use as an EGR adjustment gasket or as a baffle for an intake manifold gasket.

In particular, the insert is constructed from a single piece of sheet stainless steel material and has a peripheral portion that generally corresponds to the shape of the gasket hole and is adapted to sealingly engage the peripheral surface of the gasket hole. The insert of the present invention further includes a first pair of flanges that engage one surface of the gasket and a crimp on the opposite surface of the gasket to secure the insert to the gasket.
mp) a second pair of flanges. The central portion of the insert of the present invention can act as a baffle and completely close the gasket hole. Alternatively, the insert of the present invention can be provided with predetermined holes to precisely adjust the flow of fluid through the holes in the gasket.

In both of these cases, the central portion of the gasket is provided with an internal molding to increase the overall strength of the insert.

As a result of practical work, the present inventor has found that the gasket insert having a single-component structure of the present invention secures the insert in the gasket hole and reliably seals the entire circumference of the insert to the inner circumference of the gasket hole. It has been found to be an effective means of engaging the state.

[Example] An example will be explained with reference to the drawings. First, FIG.
2, 3 and 4 show a gasket using an insert according to the invention which is adapted to function as an adjustment device.
The assembly (10) is shown. The particular gas get assembly shown in FIGS. 1-4 is specifically adapted for use as a regulator in an automatic exhaust gas recirculation (FOR) system. The gasket assembly (10) includes a gasket body or member (12) and a generally circular insert (14). The insert (14) defines a central hole (16) with predetermined dimensions. The gas get member (12) is a stainless steel member (
It consists of the main part (18) of graphite composite reinforced with (20). in? - The tote (14) is of one-piece stainless steel construction.

The gasket member (12) has a central circular hole (22) that receives the insert (14) and a smaller diameter hole (24a) that, for normal installation, would accept a bolt.
21b> is provided. As shown in Fig. 4, the insert (14) is
) includes a pair of radially extending flanges (26a), (
26b) and a pair of circular flanges (28a) extending in the upright, axial, direction, (28b>E perpendicular to each flange (2Ba), (26b)).

The central hole (22) of the gasket member (12) has a diameter that corresponds to the diameter of the circular flanges (28a), (28b).

When assembling the gasket assembly (10), insert (14) (7) flange (28a), (2
8b) is inserted through the hole (22) and then swaged downwards against one surface (30) of the gasket member (12) to partially seal the gasket member (12) in the area (31) as shown in FIG. by compressing the surface (30)
to sealingly engage. Flange (28a), (2
8b), the other flanges (26a) and (26b) are the third
Gasket member (12) in area (33) as shown
The opposing surfaces (32) are partially compressed and caulked into sealing engagement. Each flange (26a), (
26b), (28a>, (28b) collectively surround the entire circumference of the insert (14) so that the insert (14) sealingly contacts the gasket member (12) around its entire circumference. ie, fluid flow through the gasket hole (22) can only flow through the center hole (16) of the insert.

The insert (14) may be provided with a central preformed portion (36) to increase the strength of the insert.

5, 6, 7 and 8 show further embodiments of inserts according to the invention. FIG. 8 shows a generally rectangular insert (42) adapted to be received and sealingly secured within a rectangular hole (44) formed in a gasket member (46). The particular structure of FIGS. 5-8 is particularly capable of blocking the intake manifold gas get openings. This opening is located in the coolant fluid flow lick between the cylinder head and intake manifold of a typical carburetor engine. When such cylinder heads are utilized in port fuel injected engines, there is no need to circulate cooling fluid through the rear intake impeller. Therefore, when using a standard cylinder head, it is necessary to block these particular passages.

The inserts shown in Figures 5 through 8 are the inserts shown in Figures 1 through 4.
It is secured within the hole of the gas get member (46) in the same manner as the illustrated insert (14) is secured to its cooperating gasket member. In particular, as shown in Figure 8, the insert (
42) a pair of outwardly extending flanges (48a);
(48b) and a pair of downwardly extending flanges (50a).
, (Sob) are provided. Each flange (48a)
, (48b), (50a), and (50b) jointly surround the entire circumference of the inserter (42). The insert (42) is provided with pre-formed recessed areas (52a), (52b) to increase the overall strength of the insert (42).

When assembling the insert (42),
2), flanges (50a) and (50b) are holes (44)
into the hole (44) so that it protrudes through the hole. Each flange (SOa), (50b'') is then attached to one surface (54) of the gasket member (46), as shown in FIG.
crimped against the surface (54) to sealingly engage the surface (54).
54) is partially compressed. Flange (50a), (5
When caulking the flanges (4) facing each other,
8a), (48b) sealingly engages the opposite gasket surface (56) as shown in FIG.
) is partially compressed. As shown in Figure 6, the flange (
50a), a side wall (56a) formed by (50b),
(56b) sealingly engages the edge wall (57) of the hole (44). Similarly, as shown in Figure 7, the flange (48
The side walls (60a), (60b) of a), (48b) engage in a sealing manner in the same extent of the edge wall (57) (7) of the hole (44). That is, when assembled, insert (42) is hermetically secured within gasket hole (44) around its entire periphery so as to prevent any flow of fluid through hole (44).

According to the present invention, for example, the single-part insert
It may be constructed of materials other than stainless steel.

Also, as illustrated in two different embodiments, the insert of the present invention can be configured in a variety of shapes depending on the particular gasket hole in which it is installed.

Although the present invention has been described in detail with reference to its embodiments, it is obvious that the present invention can be modified in various ways without departing from its spirit.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a gasket assembly including an embodiment of the gasket insert of the present invention used as a regulating device for an engine EGR system; FIGS.
An enlarged sectional view taken along lines 2-2 and 3-3 in the figure, respectively;
FIG. 4 is an exploded perspective view showing the manner in which the insert of FIG. 1 cooperates with its cooperating gasket member, and FIG. 6 and 7 are enlarged cross-sectional views taken along lines 6-6 and 7-7, respectively, of FIG. 5; FIG. 8 shows the insert of FIG. 5; FIG. 3 is an exploded perspective view showing a method of assembling to cooperating gasket members. DESCRIPTION OF SYMBOLS 10... Gasket assembly, 12... Gasket sheet, 14... Insert, 22... Hole,
26a, 26b, 28a, 28b...flange, 3
0.32...Surface

Claims (7)

[Claims] (1) An insert for at least partially restricting the flow of fluid through a hole formed in a sheet of gasket material, comprising a single-piece metallic element having an outer periphery generally corresponding to the shape of the hole; a first pair of flanges extending outwardly from the peripheral portion and adapted to sealingly engage one surface of the sheet of gasket material; a second pair of flanges adapted to sealingly engage opposite surfaces of the insert. 2. The insert of claim 1, wherein said first and second pairs of flanges jointly surround the entire periphery of said insert. (3) the hole defines an inner peripheral surface, a wall is provided at the peripheral portion of the insert, the first and second pairs of flanges extend from the wall, and the wall defines an inner peripheral surface of the hole; 2. The insert of claim 1, wherein the insert sealingly engages the insert. 4. The insert of claim 1, further comprising a pre-shaped uneven central portion to increase the strength of the insert. 5. The insert of claim 1, further comprising a central portion defining an adjustment hole with reduced dimensions relative to said hole. (6) Claim 1 comprising a central portion that completely closes the hole.
Insert as described. (7) (a) providing a sheet of gasket material with a hole formed therein; and (b) having an outer periphery generally corresponding to the shape of the hole and generally parallel to the sheet; a first pair of flanges extending outwardly from the portion in opposite directions; and a second pair of flanges extending from the outer peripheral portion orthogonally to the first pair. (c) the first pair of flanges engage one surface of the sheet and the second pair of flanges extend through the hole; (d) crimping the second pair of flanges to opposite surfaces of the sheet so that the insert extends over the first pair of flanges;
and a second respective pair of flanges in sealing engagement with the one surface and the opposite surface, respectively.