Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Reexamination Certificate
1999-05-11
2001-01-16
Knight, Anthony (Department: 3626)
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
C227S130000, C277S394000, C277S572000
Reexamination Certificate
active
06173963
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a sealing assembly for a valve in a power nailer, wherein the movable member of the valve has two seals mounted thereto and each seal has an inclined and flexible portion so as to seal the portion between the movable member and the fixed frame when the movable member is moving.
BACKGROUND OF THE INVENTION
A conventional sealing assembly for an inlet valve of a power nailer is shown in
FIG. 1
, wherein the inlet valve generally includes a fixed frame
200
which fixedly attached to the end opposite to the nail ejecting end of the barrel, and a movable member
300
which is movably engaged with the fixed frame
200
and biased by a spring
330
. The fixed frame
200
is a ring-shaped member and has a first annular flange
210
extending from the outside thereof and a second annular flange
220
extending from one of two sides of the fixed frame
200
. The movable member
300
has a shape similar to that of the fixed frame
200
and includes a third annular
320
flange extending from the outside thereof so as to movably engage with the inside of the first annular flange
210
, and a fourth annular flange
310
which is inserted through the central hole of the ring-shaped fixed frame
200
. The spring
330
is biased between the end cap
400
and one of two sides of the movable member
300
. A first seal
600
is received between the second annular flange
220
and the fourth annular flange
310
, and a second seal
500
is engaged with the distal edge of the first annular flange
210
and the other side of the movable member
300
. The first seal
600
has two contact points
610
,
630
movably contact the fourth annular flange
310
of the movable member
300
, and the other two contact points
620
,
640
contact the second annular flange
220
of the fixed frame
200
. The second seal
500
has a deformable portion
530
which allows the second seal
500
to be deformed without disengaging from the fixed frame
200
or the movable member
300
while the movable member
300
is moved reciprocatingly.
A piston
700
with a driving shaft
710
is movably received in the cylinder
720
. The cylinder
720
has one end thereof that the nails (not shown) are ejected by the driving shaft
710
, and the other end thereof which is connected to the movable member
300
. When the trigger (not shown) is pulled, the high pressure air enters into the space between the movable member
300
and the piston
700
so as to push the piston
700
to eject the nail and, in the same time, the movable member
300
is moved to compress the spring
330
. When the trigger is released, the movable member
300
is biased by the spring
330
to be moved toward the cylinder
720
.
When the high pressure air enters into the barrel, the first seal
600
is expanded and the inner periphery including the two contact points
610
,
630
is attached to the fourth annular flange
310
so that the frictional force between the first seal
600
and the fourth annular flange
310
of the movable member
300
is large.
Furthermore, when the movable member
300
is moving, the second seal
500
is stretched between the distal edge of the first annular flange
210
and the movable member
300
. The second seal
500
could be broken after being used for a period of time.
The present invention intends to provide a seal assembly which includes two seals respectively connected between the movable member and the fixed frame, and provides less frictional force between the movable member and the fixed frame.
The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional sealing assembly of a power nailer.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a combination of a sealing assembly and an inlet valve of a power nailer, comprising a fixed frame having a central hole and a first flange extending from the outside of the fixed frame. A second flange extends from one of two sides of the fixed frame and a third flange extends from the periphery defining the central hole through which the tubular portion of a movable member extends, The third flange has a first tapered distal edge.
The movable member is movably engaged with the first flange at an outer periphery thereof and biased by a spring. The movable member has a second tapered distal edge defined in one of two sides thereof and the second tapered distal edge is located near the outer periphery of the movable member.
A first seal is received between the second flange and the third flange of the fixed frame. The first seal has a first tongue portion extending radially inward therefrom and rested on the first tapered distal edge of the movable member so that the first tongue portion movably contacts the tubular portion of the movable member. A second seal is engaged with the movable member and has a second tongue portion extending radially outward therefrom. The second tongue portion is rested on the second tapered distal edge and movably contacts the first flange.
The primary object of the present invention is to provide a sealing assembly which provides less frictional force between the fixed frame and the movable member.
Further objects, advantages, and features of the present invention will become apparent from the following detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 5131579 (1992-07-01), Okushima et al.
patent: 5671880 (1997-09-01), Ronconi
patent: 5829660 (1998-11-01), White
patent: 5860447 (1999-01-01), Chu
patent: 5927584 (1999-07-01), Akiba
Chen Jack
Ho Roman
Hung Sunking
Basso Industry Corp.
Baxley Charles E.
Knight Anthony
Pickard Alison K.
LandOfFree
Sealing assembly for an inlet valve of a power nailer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sealing assembly for an inlet valve of a power nailer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealing assembly for an inlet valve of a power nailer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2506258