Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Lap bolt or fastener
Reexamination Certificate
2000-05-19
2001-12-11
Saether, Flemming (Department: 3626)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Lap bolt or fastener
C411S371100, C016S002100
Reexamination Certificate
active
06328513
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a vibration floating washer assembly and a method of attaching a vibration floating washer to a heat insulating plate. More particularly to a vibration floating washer assembly for vibration isolation and a method of attaching a vibration floating washer for vibration isolation to a heat insulating plate which is attached to a heat generating source in an automobile.
2. Description of the Related Art
Since the temperature of an exhaust manifold, an EGR (exhaust gas recirculator) a catalyst, a muffler, and the like of an automobile becomes high, these memers are provided with heat insulating plates for prevention of burns or heat damage to other component parts. However, if the heat insulating plates are directly attached to these members, the heat insulating plates serve as vibrating plates and constitute causes for the generation of noise.
For example, as shown in
FIG. 7
, an attaching method has been adopted in which a heat insulating plate
5
is arranged with a vibration floating washer structure by using a washer
1
with a sleeve, a pair of metallic cushioning materials
2
, a washer
3
, and an attaching bolt
4
.
However, to attach the heat insulating plate
5
on a heat generating source to be attached to in an assembly line by this attaching method, the heat insulating plate
5
is first placed between the pair of metallic cushioning platez
2
arranged around a peripheral edge portion of an attaching-bolt insertion hole
6
in the heat insulating plate
5
. The washer
3
is then placed on one side of the cushioning material
2
, and a sleeve
7
of the washer
1
with a sleeve is inserted in the insertion hole
6
irom the opposite side of the insertion hole
6
.
Then, in this state, since the washers
1
and
3
and the cushioning materials
2
are not fixed to the insertion hole
6
, it has been necessary to insert the attaching bolt
4
into the insertion hole
6
and fix the attaching bolt
4
to a supporting portion
8
while manually holding and fixing the washers
1
and
3
and the like. This method is inefficient, and the positioning of the attaching bolt
4
and the bolt hole in the supporting portion
8
has involved extreme difficulty.
SUMMARY OF THE INVENTION
The present invention is aimed at overcoming the above-described problems, and is characterized by attaching in advance a washer with a sleeve, including a sale washer and a female washer, to an inner side and a peripheral edge portion of an attaching-bolt insertion hole in a heat insulating plate with a metallic cushioning material placed therebetween. A primary object of the present invention is to simplify the operation of attaching the heat insulating plate to a supporting portion to be attached to.
To attain the above object, in accordance with a first aspect of the present invention, there is provided a method of attaching a vibration floating washer with a sleeve to an inner side and a peripheral edge portion of an attaching-bolt insertion hole in a heat insulating plate with a metallic cushioning material placed therebetween, characterized in that the cushioning material is disposed on the inner side the peripheral edge portion of the attaching-bolt insertion hole, that a male sleeve of a male washer and a female sleeve of a female washer are respectively inserted into the bolt insertion hole from both sides of the heat insulating plate, the male washer and the female washer constituting the vibration floating washer with a sleeve, and that the male washer and the female washer are fitted and fixed to each other by means of fitting means provided on at least one of the male sleeve and the female sleeve while the heat insulating plate is maintained in a state of noncontact with both the male washer and the female washer. In accordance with a second aspect of the present invention, the fitting means provided on at least one of the male sleeve and the;female sleeve is one of an annular projecting portion and a discontinuous projecting portion.
In addition, in accordance with a third aspect of the present invention, the metallic cushioning material comprises a male cushioning material and a female cushioning material, and the male cushioning material has a projecting cross-sectional shape with an axially projecting portion formed thereon, while the female cushioning material has a recessed cross-sectional shape with an axially recessed portion formed therein, both the male cushioning material and the female cushioning material having respective through holes through which the male and female sleeves of the vibration floating washer with a sleeve are passed. In accordance with a fourth aspect of the present invention, the metallic cushioning material is molded by compression molding an SUS mesh.
Furthermore, there is provided a vibration floating washer assembly for being attached to a heat insulating plate including an attaching-bolt insertion hole. The washer assembly comprising: a vibration floating washer with a sleeve is and a metallic damping element placed between the vibration floating washer. The vibration floating washer includes a male washer including a male sleeve and a female washer including a female sleeve. At least one of the male and female sleeves includes a fitting portion provided thereon so that the heat insulating plate is maintained in a state of noncontact with both the male and female washers.
In accordance with the present invention, prior to attaching the heat insulating material to the supporting portion, the vibration floating washer with a sleeve, in which the male washer and the female washer can be fitted and fixed to each other by one or the fitting means, is attached and fixed, in advance, to the inner side and the peripheral edge portion of the attaching-bolt insertion hole in the heat insulating plate with the metallic cushioning material placed there between. Accordingly, it is possible to simplify the operation of attaching the heat insulating plate to the supporting portion to be attached to. Further, it is possible to reduce the vibration and facilitate the positional alignment between the attaching bolt and the bolt hole in the supporting portion.
REFERENCES:
patent: 3622194 (1971-11-01), Bryk
patent: 4295691 (1981-10-01), Rubenthaler
patent: 4445594 (1984-05-01), Hoffman
patent: 4921371 (1990-05-01), Boiraeu
patent: 5069586 (1991-12-01), Casey
patent: 1655607 (1970-06-01), None
patent: 1389731 (1975-04-01), None
patent: 197 16 733A1 (1998-10-01), None
European Search Report.
Niwa Takahiro
Sugai Hiroto
Tanaka Masafumi
Nichias Corporation
Pillsbury & Winthrop
Saether Flemming
LandOfFree
Vibration floating washer assembly and method of attaching... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vibration floating washer assembly and method of attaching..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vibration floating washer assembly and method of attaching... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2598539