Pipe joints or couplings – Movable jaw
Reexamination Certificate
2000-08-21
2002-12-03
Nicholson, Eric K. (Department: 3679)
Pipe joints or couplings
Movable jaw
C285S385000, C285S342000, C285S353000
Reexamination Certificate
active
06488318
ABSTRACT:
TECHNICAL FIELD AND BACKGROUND ART
The present invention is a piping joint and an integrated valve with it. The invention improves watertightness of connecting parts, maintains the joint firm and keeps its quality regardless repeated uses, thus it is convenient for maintenance.
Prior art related to the present invention is “Valve with a pipe-connecting part” published in Korean Utility Model Specification No. 97-1671. Said prior art was invented by the current inventor and its technical gist is that, as shown in
FIGS. 16 and 18
, a valve consists of a ball
11
operated by a lever
17
to pass through or to block an entrance and an exit of the valve, tapered screw part
13
a
equipped along circumferential side inside of pipe-connecting part
13
in said valve, screw part
20
a
formed on circumferential side to correspond to said screw part
13
a
, an open hole
20
b
through its axis, a bush
20
with a slant
20
d
on its longitudinal section, the first packing ring
16
with a slant
16
b
on the side; the second packing ring
18
which carries split on edge in part and involves slants
18
b
,
18
c
on both sides to contact a slant
20
d
of a bush
20
and a slant of the first packing ring
16
. Thus, in the prior art as said bush spins toward inside of the valve, a slant formed at the edge of the bush
20
pushes a slant
18
c
of the second packing ring
18
as shown in
FIG. 17
so that an open hole
18
a
of the second packing ring
18
is narrowed and finishes sealing.
But several disadvantages found in said prior art are as follows. First, to form tapered screw part
13
a
around the inside of the pipe-connecting part
13
results in difficulties in fine manufacturing and low precision of products. Thus, increased errors in manufacturing result in high inferiority rate in products and piping using this product may result in inferior construction Second, the screw part
13
a
is formed inside said pipe-connecting part
13
through whole length and the first packing ring
16
and the second packing ring are inserted into screw part
13
a
. Therefore, it is inconvenient for maintenance because it is difficult to take them apart when repair needed.
Third, in adjusting the proper tightening power to the bush
20
, it is hard to detect required certain level of tightening power from outside. This results in disadvantages that, when tightening power is too strong, damage(s) can occur on the first packing ring
16
, the second packing ring
18
, screw part
13
a
in pipe-connecting part
13
, and screw part
20
a
in the bush
20
and, when tightening power is weak, sealing condition gets bad.
With the invention, the first packing rings are placed in the second holes of the connecting parts, and insertion of bushes increases thickness of the pushed second packing rings. Consequently, airtight and watertight between pipes and a joint body can be maintained. Connection can be maintained firm by that the second packing rings hold pipes tight. Thus, the invention can be applied to piping for fluid with high pressure. Elevated stoppers formed at the second packing rings are caught by stoppers formed at connecting parts, thus this prevents the first packing rings from excessive transformation and its operator would not waste excessive energy in piping by detecting the connection condition easily from the outside. Repeated uses are possible to each components, thus this effects that saves budget in maintenance.
DISCLOSURE OF INVENTION
The purpose of the invention designed to solve problems of said prior art is to provide a piping joint and a valve controlling fluid flow, in which simple joint tools can conjoin pipes without screws or extra flange coupling processes, in piping for heating, water service, hygiene, and industry. With the invention, first, pipe's watertightness is improved, second, connection can be maintained firm, third, tightening level can be detected from the outside so that a proper level can be obtained, and fourth, possible repeated use ease its maintenance.
To achieve the purposes, the present invention provides a joint body comprising connecting part(s) on one side, both sides, or three places where the end of raw pipe is inserted, a bush screwed inside the connecting part in the joint body, the first packing ring inserted at the edge of said pipe, and the second packing ring inserted at the edge of the first packing ring. The connecting part of the joint body comprises the first hole where a pipe is inserted, the second hole where the first packing ring connected with the edge of the pipe is inserted, and the third hold being equipped with a female thread connecting the second packing ring and the bush. The three holes form three phases outward on the concentric circle. Said first packing ring, which is made of silicon or Teflon that is flexible an sustainable against heat, is formed as short cylindrical figure with a right angle cutting end on both sides. The one side of said second packing ring is connected to the first packing ring. And around the contact part a stopper between the second hold and the third hole is placed to prevent the second packing ring from inserting too deeply into inside of the connecting part. The other side of the second packing ring is tapered down in a certain angle to contact a slant of bush's edge and the tapered part is equipped with projections inside to hold pipes firm and to prevent said pipes from secession.
Furthermore, a male thread equipped in said bush conjoins a female thread in the third hole at the joint body's connecting part. The male thread is equipped toward lengthwise with several slits which help a male thread stick a female thread when screwed.
REFERENCES:
patent: 1791121 (1931-02-01), Cowles
patent: 1983840 (1934-12-01), Dohner
patent: 2412664 (1946-12-01), Wolfram et al.
patent: 2452890 (1948-11-01), Wolfram
patent: 2466526 (1949-04-01), Wolfram
patent: 2470546 (1949-05-01), Carlson
patent: 2478149 (1949-08-01), Wolfram et al.
patent: 2585453 (1952-02-01), Gallagher et al.
patent: 3485517 (1969-12-01), Howe
patent: 3733093 (1973-05-01), Seiler
patent: 4062572 (1977-12-01), Davis
patent: 4630851 (1986-12-01), Ogawa
patent: 4798404 (1989-01-01), Iyanicki
patent: 2204773 (1974-05-01), None
patent: 1474850 (1977-05-01), None
Nicholson Eric K.
Shim Jae Young
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