NZ755205B2 - Pipe-fitting - Google Patents
Pipe-fitting Download PDFInfo
- Publication number
- NZ755205B2 NZ755205B2 NZ755205A NZ75520519A NZ755205B2 NZ 755205 B2 NZ755205 B2 NZ 755205B2 NZ 755205 A NZ755205 A NZ 755205A NZ 75520519 A NZ75520519 A NZ 75520519A NZ 755205 B2 NZ755205 B2 NZ 755205B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- pipe
- fitting
- gripping members
- ridge
- Prior art date
Links
- 230000001808 coupling Effects 0.000 claims abstract description 29
- 238000010168 coupling process Methods 0.000 claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 claims abstract description 29
- 238000003780 insertion Methods 0.000 claims abstract description 5
- 210000000515 Tooth Anatomy 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 16
- 239000007769 metal material Substances 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- 239000004698 Polyethylene (PE) Substances 0.000 description 4
- 230000001070 adhesive Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003466 anti-cipated Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
- F16L17/03—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips
- F16L17/035—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket having annular axial lips the sealing rings having two lips parallel to each other
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/022—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings used with sleeves or nipples for pipes of the same diameter, or with reduction pieces
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
- F16L21/03—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed in the socket before connection
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/0842—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring which is split into a plurality of component parts which are held in place by means of a resilient ring member
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/0845—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of retaining members associated with the packing member
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
- F16L37/0925—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with rings which bite into the wall of the pipe
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10B—ORGANS, HARMONIUMS OR SIMILAR WIND MUSICAL INSTRUMENTS WITH ASSOCIATED BLOWING APPARATUS
- G10B3/00—Details or accessories
- G10B3/08—Pipes, e.g. open pipes, reed pipes
Abstract
pipe-fitting includes a coupling and a flexible pipe-restraint gasket. The coupling includes a bell that defines a pipe insertion mouth at an end of the coupling and an inner recess. The flexible pipe-restraint gasket assembly is disposed within the inner recess and includes an annular body, a plurality of discrete gripping members and at least one extension portion. The plurality of gripping members are disposed around an outer periphery of the body. The at least one extension portion extends from the body and is disposed between a pair of the plurality of gripping members. The at least one extension portion defines a pocket. rality of discrete gripping members and at least one extension portion. The plurality of gripping members are disposed around an outer periphery of the body. The at least one extension portion extends from the body and is disposed between a pair of the plurality of gripping members. The at least one extension portion defines a pocket.
Description
PIPE-FITTING
FIELD
The present disclosure relates to a pipe-fitting.
BACKGROUND
This section provides background information related to the present
disclosure which is not necessarily prior art.
Traditionally, pipe-fittings have been used to join two or more metallic
pipes (e.g., ductile iron pipes) to each other, such as in city water lines. Such pipe-
fittings are cumbersome to install and are inadequate for fluid flow having high
pressures. Furthermore, such pipe-fittings are not easily adaptable to pipes made
of different materials (i.e., pipes made of polyvinylchloride (PVC) or polyethylene
(PE), for example, instead of ductile iron). The present disclosure provides a pipe-
fitting that is adequate for fluid flow at high pressures and is convenient to install.
Furthermore, the pipe-fitting of the present disclosure is adaptable to pipes of
different materials, such as pipes made of polyvinylchloride (PVC) or polyethylene
(PE), for example.
SUMMARY
This section provides a general summary of the disclosure, and is
not a comprehensive disclosure of its full scope or all of its features.
In one form, the present disclosure provides a pipe-fitting. The pipe-
fitting includes a coupling and a flexible pipe-restraint gasket. The coupling
includes a bell that defines a pipe insertion mouth at an end of the coupling and an
inner recess. The flexible pipe-restraint gasket assembly is disposed within the
inner recess and includes an annular body, a plurality of discrete gripping members
and at least one extension portion. The plurality of gripping members are disposed
around an outer periphery of the body. The at least one extension portion extends
from the body and is disposed between a pair of the plurality of gripping members.
The at least one extension portion defines a pocket.
In some configurations of the pipe-fitting of the above paragraph, the
pocket includes opposing walls being non-parallel and diverging relative to each
other.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the pocket includes a width. The at least one extension portion
is configured to collapse thereby reducing the width of the pocket.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, opposing sides of each gripping member are curved.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, each gripping member includes a bottom surface and a top
curved surface.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, teeth extend from the bottom surface of each gripping member.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, each gripping member includes a first angled surface and a
second angled surface that cooperate to form a recess between two of the teeth.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the body and the at least one extension portion are made of an
elastomeric material. The plurality of gripping members are made of a metallic
material.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the bell includes a ridge and a sloping portion extending from
the ridge. The ridge and the sloping portion cooperate to define the inner recess.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, a bulbous portion is disposed at an end of the ridge.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the bulbous portion protrudes inwardly past an inner surface of
the ridge.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the bulbous portion protrudes outwardly past at least a portion
of an outer surface of the ridge.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the inner surface of the ridge and a line tangent to the bulbous
portion in a direction parallel to a center axis of the coupling forms an angle.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the angle is between 15 degrees and 19 degrees.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, a thickness of the bulbous portion is greater than a thickness
of the ridge.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the bell includes a ridge and a sloping portion extending from
the ridge. The ridge and the sloping portion cooperate to define the inner recess.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, a bulbous portion is disposed at an end of the ridge. The
bulbous portion protrudes inwardly past an inner surface of the ridge.
In some configurations of the pipe-fitting of any one or more of the
above paragraphs, the inner surface of the ridge and a line tangent to the bulbous
portion in a direction parallel to a center axis of the coupling forms an angle.
In another form, the present disclosure provides a pipe-restraint
gasket assembly. The pipe-restraint gasket includes an annular body, a plurality
of discrete gripping members and at least one extension portion. The plurality of
discrete gripping members are disposed around an outer periphery of the body.
The at least one extension portion extends from the annular body and is disposed
between a pair of the plurality of gripping members. The at least one extension
portion defining a pocket. The at least one extension portion is configured to
collapse.
In yet another form, the present disclosure provides a coupling
including a bell and a bulbous portion. The bell defines a pipe insertion mouth at
an end of the coupling and includes a ridge and a sloping portion extending from
the ridge. The ridge and the sloping portion cooperate to define an inner recess.
The bulbous portion is disposed at an end of the ridge. The bulbous portion
protrudes inwardly past an inner surface of the ridge. ]
Further areas of applicability will become apparent from the
description provided herein. The description and specific examples in this
summary are intended for purposes of illustration only and are not intended to limit
the scope of the present disclosure.
DRAWINGS
The drawings described herein are for illustrative purposes only of
selected embodiments and not all possible implementations, and are not intended
to limit the scope of the present disclosure.
Figure 1 is an exploded cross-sectional view of the pipe assembly
according to the principles of the present disclosure;
Figure 2 is an exploded view of a portion of the pipe assembly of
Figure 1;
Figure 3 is a perspective view of a pipe-restraint gasket of the pipe
assembly of Figure 1;
Figure 4 is a cross-sectional view of the pipe-restraint gasket of
Figure 3;
Figure 5 is a partial perspective view of the pipe-restraint gasket of
the pipe assembly of Figure 1;
Figure 6 is a cross-sectional view of a portion of the pipe assembly
of Figure 1 showing the pipe-restraint gasket being disposed in a coupling of the
pipe assembly;
Figure 7 is front view of the pipe assembly of Figure 1 showing the
pipe-restraint gasket being disposed in the coupling of the pipe assembly;
Figure 8 is a cross-sectional view of a portion of the pipe assembly
of Figure 1 showing the pipe-restraint gasket disposed in the coupling of the pipe
assembly;
Figure 9 is a cross-sectional view of a portion of the pipe assembly
of Figure 1 showing a pipe being inserted into the coupling;
Figure 10 is a cross-sectional view of a portion of the pipe assembly
of Figure 1 showing the pipe inserted into the coupling;
Figure 11 is a cross-sectional view of a portion of the pipe assembly
of Figure 1 showing a force applied to the pipe;
Figure 12 is close-up view of a portion of the pipe assembly indicated
as area 12 in Figure 11;
Figure 13 is a perspective of a portion of the pipe assembly of Figure
1 fully assembled;
Figure 14 is a perspective view of an alternate pipe-restraint gasket;
Figure 15 is a cross-sectional view of the pipe-restraint gasket of
Figure 14;
Figure 16 is a close-up view of a portion of the pipe-restraint gasket
indicated as area 16 in Figure 14; and
Figure 17 is a cross-sectional view of an alternate pipe-restraint
gasket.
Corresponding reference numerals indicate corresponding parts
throughout the several views of the drawings.
DETAILED DESCRIPTION
Example embodiments will now be described more fully with
reference to the accompanying drawings.
Example embodiments are provided so that this disclosure will be
thorough, and will fully convey the scope to those who are skilled in the art.
Numerous specific details are set forth such as examples of specific components,
devices, and methods, to provide a thorough understanding of embodiments of the
present disclosure. It will be apparent to those skilled in the art that specific details
need not be employed, that example embodiments may be embodied in many
different forms and that neither should be construed to limit the scope of the
disclosure. In some example embodiments, well-known processes, well-known
device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing
particular example embodiments only and is not intended to be limiting. As used
herein, the singular forms "a,” "an," and "the" may be intended to include the plural
forms as well, unless the context clearly indicates otherwise. The terms
"comprises," "comprising," “including,” and “having,” are inclusive and therefore
specify the presence of stated features, integers, steps, operations, elements,
and/or components, but do not preclude the presence or addition of one or more
other features, integers, steps, operations, elements, components, and/or groups
thereof. The method steps, processes, and operations described herein are not to
be construed as necessarily requiring their performance in the particular order
discussed or illustrated, unless specifically identified as an order of performance.
It is also to be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on," “engaged to,”
"connected to," or "coupled to" another element or layer, it may be directly on,
engaged, connected or coupled to the other element or layer, or intervening
elements or layers may be present. In contrast, when an element is referred to as
being "directly on," “directly engaged to,” "directly connected to," or "directly
coupled to" another element or layer, there may be no intervening elements or
layers present. Other words used to describe the relationship between elements
should be interpreted in a like fashion (e.g., “between” versus “directly between,”
“adjacent” versus “directly adjacent,” etc.). As used herein, the term "and/or"
includes any and all combinations of one or more of the associated listed items.
Although the terms first, second, third, etc. may be used herein to
describe various elements, components, regions, layers and/or sections, these
elements, components, regions, layers and/or sections should not be limited by
these terms. These terms may be only used to distinguish one element,
component, region, layer or section from another region, layer or section. Terms
such as “first,” “second,” and other numerical terms when used herein do not imply
a sequence or order unless clearly indicated by the context. Thus, a first element,
component, region, layer or section discussed below could be termed a second
element, component, region, layer or section without departing from the teachings
of the example embodiments.
Spatially relative terms, such as “inner,” “outer,” "beneath," "below,"
"lower," "above," "upper," and the like, may be used herein for ease of description
to describe one element or feature's relationship to another element(s) or
feature(s) as illustrated in the figures. Spatially relative terms may be intended to
encompass different orientations of the device in use or operation in addition to the
orientation depicted in the figures. For example, if the device in the figures is turned
over, elements described as "below" or "beneath" other elements or features would
then be oriented "above" the other elements or features. Thus, the example term
"below" can encompass both an orientation of above and below. The device may
be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially
relative descriptors used herein interpreted accordingly.
With reference to Figures 1, 2, 6-11 and 13, a pipe assembly 10 is
provided. The pipe assembly 10 includes a pipe-fitting 12, a first pipe (or fitting)
14 and a second pipe (or fitting) 16. The pipe-fitting 12 includes a coupling 18 and
a pair of pipe-restraint gaskets 20.
The coupling 18 receives the first and second pipes 14, 16 at
opposing ends thereof and is made out of a metallic material (e.g., ductile iron).
The coupling 18 is permitted to deflect, thereby being usable in seismic
applications or where ground movement is anticipated. As shown in Figures 1, 2,
7 and 13, the coupling 18 is annular-shaped and includes a pair of bells 21, 22 and
a middle portion 24. The pair of bells 21, 22 are symmetric to each other about
the middle portion 24. Each bell 21, 22 includes a ridge 26, a sloping portion 28,
a transitional portion 30 and a bulbous portion 32. As shown in Figures 1, 2, 6, 8-
13 the ridge 26 extends radially outwardly on an angle from the bulbous portion 32
to the sloping portion 28. The sloping portion 28 extends radially inwardly on an
angle from the ridge 26 to the transitional portion 30. The sloping portion 28 and
the ridge 26 cooperate to define an inner circumferential recess 33. The
transitional portion 30 extends axially from the sloping portion 28 to the middle
portion 24.
The bulbous portion 32 is annular-shaped and is disposed at an end
of the ridge 26. The bulbous portion 32 defines an opening or pipe insertion mouth
34 of a respective bell 21, 22. As shown in Figures 1, 6, 8-11, the bulbous portion
32 protrudes radially outwardly further than at least a portion of an outer surface
36 of the ridge 26. The bulbous portion 32 also protrudes radially inwardly further
than an inner surface 38 of the ridge 26. The inner surface 38 of the ridge 26 and
a line X1 extending tangent to the bulbous portion 32 in a direction parallel to a
center axis X2 of the coupling 18 forms an angle a that is between 15 degrees and
degrees. The bulbous portion 32 also includes a thickness that is thicker than
a thickness of the ridge 26. In this way, the bulbous portion 32 allows the ridge 26
to be thinner without compromising the strength and the functionality of the
coupling 18 and while also reducing the overall weight of the coupling 18. The
middle portion 24 includes an axial member 40 and a stop 42. The axial member
40 extends from an end of the transitional portion 30 of the bell 21 to an end of the
transitional portion 30 of the bell 22. The annular-shaped stop 42 extends radially
inwardly from an inside surface of the axial member 40 toward the center axis X2
of the coupling 18. The stop 42 defines an opening 43 having a diameter D1 that
is smaller than diameters D2 of the first and second pipes 14, 16. In this way, the
stop 42 prevents the first pipe 14 from being inserted through bell 21 and into the
bell 22 and prevents the second pipe 16 from being inserted through bell 22 and
into the bell 21.
Each pipe-restraint gasket 20 is disposed in the inner recess 33 that
is defined by the sloping portion 28 and the ridge 26. As shown in Figures, 1-3,
the pipe-restraint gasket 20 includes a flexible annular body 44 and a plurality of
discrete gripping members 46 disposed around an outer periphery of the body 44.
The flexible annular body 44 is made of an elastomeric material such as, styrene-
butadiene rubber (SBR), ethylene-propylene-diene monomer (EDPM) rubber, or
nitrile rubber, for example. In some configurations, the body 44 is a composite of
rubber and plastic materials. The body 44 includes an intermediate portion 48, a
pair of legs 50, 51, a plurality of attachment portions 52 and a plurality of extension
portions 54.
The pair of legs 50, 51 diverge from a rear end of the intermediate
portion 48 of the body 44 such that an angle ß is formed therebetween. In some
configurations, the angle ß is approximately 110 degrees. In some configurations,
the angle ß may be greater than or less than 110 degrees. Each triangular-shaped
attachment portion 52 extends in an axial direction from a front end 55 of the
intermediate portion 48 of the body 44 and includes a horizontal surface 56 and an
angled surface 58.
As shown in Figure 5, each U-shaped extension portion 54 is
disposed between a pair of the plurality of attachment portions 52 and extends in
an axial direction from the front end 55 of the intermediate portion 48 of the body
44. Each extension portion 54 is collapsible and extends past the plurality of
attachment portions 54 in the axial direction. Each extension portion 54 includes
opposing curved sides or walls 60 and a U-shaped pocket or opening 62. The
pocket 62 includes a width W1 that is reduced when the extension portion 54 is
collapsed. The pocket 62 also defines opposing walls 66 that are non-parallel and
diverge in an axial direction.
The plurality of gripping members 46 are made of a metallic material
(e.g., stainless steel). In some configurations, each discrete gripping member 46
may be made of a polymeric or ceramic material. The plurality of gripping
members 46 are disposed around the body 44 of the pipe-restraint gasket 20 and
are attached to the body 44 of the pipe-restraint gasket 20 by a rubber-metal
bonding process. That is, the plurality of gripping members 46 are manufactured
and then coated with an adhesive material before being disposed into a die cavity
(not shown). Once the elastomeric material is injected into the die cavity and
heated, the adhesive material is activated and the plurality of gripping members
46 and the body 44 bond to each other. Each discrete gripping member 46 is
bonded to the body 44 such that each extension portion 54 is disposed between a
pair of the plurality of gripping members 46 (Figures 1-3, 8 and 13). The plurality
of gripping members 46 and the plurality of extension portions 54 are also arranged
in an alternating fashion. Each gripping member 46 includes a body 68 and teeth
The body 68 defines a cavity (not shown) that securely receives the
attachment portion 52 of the body 44 during the bonding process such that a back
edge 74 (Figure 4) of the body 68 contacts the front end 55 of the intermediate
portion 48. The body 68 has a top surface 77 that is curved from a front edge 78
of the body 68 to the back edge 74 of the body 68. The body 68 also has opposing
curved sides 76 that extend from the front edge 78 of the body 68 to the back edge
74 of the body 68. The opposing curved sides 76 correspond to and are attached
to a curved side 60 of a respective extension portion 54.
The teeth 70 (comprised of tooth 70a, 70b and 70c) extend radially
inwardly from a bottom surface 78 of the body 68. Each tooth 70a, 70b, 70c
extends the length of the bottom surface 78 of the body 68 and extends parallel to
the others. As shown in Figure 4, a first angled surface 80 extends from a
respective tooth 70a, 70b into the body 68 and a second angled surface 82 extends
from a respective tooth 70b, 70c into the body 68. The first angled surface 80 and
the second angled surface 82 cooperate to form a recess 84 in the body 68. The
recess 84 is formed between a pair of teeth 70. A first surface 86 of a respective
tooth 70a, 70b, 70c and a line X3 extending radially from an end of the first surface
86 in a direction perpendicular to the center axis X2 forms an angle ? that is
approximately 5 degrees. A second surface 88 of the respective tooth 70a, 70b,
70c and a line X4 extending radially from an end of the second surface 88 in a
direction perpendicular to the center axis X2 forms an angle ? that is approximately
degrees. It should be understood that the teeth 70 may have different
specifications (e.g., width, height, etc.) based on the pipe that the teeth 70 are
gripping (e.g., teeth gripping polyethylene (PE) pipe may be different in height or
width than teeth gripping polyvinylchloride (PVC)).
As shown in Figure 13, the first and second pipes 14, 16 are securely
and sealingly attached to the pipe-fitting 12. The first and second pipes 14, 16
are tubular-shaped and may be made out of a polyvinylchloride (PVC),
polyethylene (PE), engineered PVC, or metallic material (e.g., ductile iron or steel),
for example. The first and second pipes 14, 16 define an opening 90 for fluid to
flow therethrough.
With continued reference to Figures 1-13, assembly of the pipe
assembly 10 will now be described in detail. As shown in Figure 8, each pipe-
restraint gasket 20 is first disposed in a respective inner recess 33 that is defined
by the sloping portion 28 and the ridge 26. Since the diameter of the pipe-restraint
gasket 20 is wider than the diameter of the opening 34 defined by the bulbous
portion 32, at least a portion of the pipe-restraint gasket 20 is contorted (Figure 7)
to facilitate disposal of the pipe-restraint gasket 20 in the inner recess 33.
As shown in Figure 9, the first pipe 14 is then inserted into the
opening 34 defined by the bell 21 of the coupling 18. As the first pipe 14 comes
into contact with the gripping members 46 of the pipe-restraint gasket 20, the
gripping members 46 are pushed back into the bell 21 of the coupling 18, which
causes more compression of the body 44. This also slightly widens the width W1
of the pocket 62 of the extension portions 54. As shown in Figure 10, the first pipe
14 is inserted further into the opening 34 such that an end thereof is at or near the
stop 42.
When a force is applied to the first pipe 14 (e.g., an internal force
applied to the first pipe 14 via fluid flowing through the first pipe 14 or a force pulling
the first pipe 14 away from the coupling 18), the gasket 20 moves forward in the
bell 21 such that the teeth 70 grips an outer wall 92 of the first pipe 14. In some
configurations, as shown in Figure 11, fluid flowing through the first pipe 14 may
flow to the gasket 20 via a gap 94 between the end of the first pipe 14 and the stop
42, which causes the gasket 20 to move forward in the bell 21 such that the teeth
70 grips the outer wall 92 of the first pipe 14. As the teeth 70 grips the outer wall
92 of the first pipe 14, the pocket 62 of each extension portion 54 collapses. In
this way, the gripping members 46 contact one another 360 degrees around the
outer wall 92 of the first pipe 14, thereby avoiding point loading or pipe distortion.
Any displaced material of the first pipe 14 is received in the recess 84 to ensure
that the teeth 70 are fully engaged with the outer wall of the first pipe 14. It should
be understood that the second pipe 16 is installed in a similar manner as the first
pipe 14 described above.
It should be understood that during a pressure surge or water
hammer, the gripping members 46 move forward such that the teeth 70 grips the
outer wall 92 of the first pipe 14 and a ramp surface on the bulbous portion 32
contacts the gripping members 46 to prevent the pipe-fitting from separating (i.e.,
the ramp surface on bulbous portion 32 serves as a stop). This causes the gripping
members 46 to form a continuous ring and develop its own hoop stress, which
prevents the pipe fitting from separating.
It should also be understood that the gasket 20 of the present
disclosure may be used on first and second pipes 14, 16 of different material and
with varying pipe tolerances. That is, if the first and second pipes 14, 16 are slightly
over tolerances then the gripping members 46 will not move forward in the bells
21, 22 as much when the gripping members 46 grip the first and second pipes 14,
16. If the first and second pipes 14, 16 are under tolerance (e.g., pipes having
thinner walls such as PVC) a ramp portion of the bulbous portion 32 will prevent
the pipe fitting from separating. This is achieved due to the fact that the gripping
members 46 form one continuous ring that will not cause point loading or distortion
of the first and second pipes 14, 16. Each gripping member 46 has three rows of
teeth. Each tooth may be different in height with the shortest closest to the bell
opening. This arrangement allows for easy installation of male section pipes.
With reference to Figures 14-16, another pipe-restraint gasket 120 is
provided. The pipe-restraint gasket 120 can be incorporated into the pipe
assembly 10 instead of the pipe-restraint gasket 20 described above. The
structure and function of the pipe-restraint gasket 120 may be similar or identical
to that of the pipe-restraint gaskets 20, apart from any exceptions described below.
The pipe-restraint gasket 120 includes a flexible annular body 144
and a plurality of discrete gripping members 146 disposed around an outer
periphery of the body 144. The flexible annular body 144 is made of an elastomeric
material such as, styrene-butadiene rubber (SBR), ethylene-propylene-diene
monomer (EDPM) rubber, or nitrile rubber, for example. In some configurations,
the body 144 is a composite of rubber and plastic materials. The body 144 includes
a pair of legs 150, 151, an attachment portion153 and a plurality of extension
portions 154.
The pair of legs 150, 151 diverge from a rear end of the attachment
portion 153 of the body 144 such that an angle ß is formed therebetween. In some
configurations, the angle ß is approximately 110 degrees. In some configurations,
the angle ß may be greater than or less than 110 degrees.
Each U-shaped extension portion 154 extends in an axial direction
from a front end 155 of the attachment portion 153 of the body 144 and is
collapsible. Each extension portion 154 includes opposing curved sides 160 and
a U-shaped pocket or opening 162. The pocket 162 includes a width W1 (Figure
16) that is reduced when the extension portion 154 is collapsed. The pocket 162
also defines opposing walls 166 that are non-parallel and diverge in an axial
direction.
The plurality of gripping members 146 are made of a metallic material
(e.g., stainless steel). In some configurations, each discrete gripping member 146
may be made of a polymeric or ceramic material. The plurality of gripping
members 146 are disposed around the body 144 of the pipe-restraint gasket 120
by a rubber-metal bonding process. That is, the plurality of gripping members 146
are manufactured and then coated with an adhesive material before being
disposed into a die cavity (not shown). Once the elastomeric material is injected
into the die cavity and heated, the adhesive material is activated and the plurality
of gripping members 146 and the body 144 are bonded to each other. Each
discrete gripping member 146 is bonded to the body 144 such that each extension
portion 154 is disposed between a pair of the plurality of gripping members 146.
The plurality of gripping members 146 and the plurality of extension portions 154
are also arranged in an alternating fashion. Each gripping member 146 includes
a body 168 and teeth 170.
The body 168 is attached to the attachment portion 153 such that a
back edge 174 of the body 168 contacts the front end 155 of the attachment portion
153. The body 168 has a top surface 177 that is curved from a front edge 178 of
the body 168 to the back edge 174 of the body 168. The body 168 also has
opposing curved sides 176 that extend from the front edge 178 of the body 168 to
the back edge 174 of the body 168. The opposing curved sides 176 correspond
to and are attached to a curved side 160 of a respective extension portion 154.
The teeth 170 (comprised of tooth 170a, 170b and 170c) extend
radially inwardly from a bottom of the body 168. Each tooth 170a, 170b, 170c
extends the length of the bottom of the body 168 and extends parallel to the others.
An angled surface 180 and the teeth 170a, 17b cooperate to define a first recess
184 and an angled surface 182 and the teeth 170b, 170c cooperate to define a
second recess 186.
With reference to Figure 17, gripping members 246 (only one shown
in Figure 17) are provided. The gripping members 246 can be incorporated into
the pipe-restraint gasket 20 instead of the gripping members 46 described above.
The structure and function of the gripping members 246 may be similar or identical
to that of the gripping members 46, apart from any exceptions described below.
Each gripping member 246 includes a body 268 and teeth 270. The
body 268 defines a cavity (not shown) that securely receives the attachment
portion 52 such that a back edge 274 of the body 268 contacts the front end 55 of
the intermediate portion 48. The body 268 has a top surface 277 that is curved
from a front edge 278 of the body 268 to the back edge 274 of the body 268. The
body 268 also has opposing curved sides (not shown) that extend from the front
edge 278 of the body 268 to the back edge 274 of the body 268. The opposing
curved sides (not shown) correspond to and are attached to a curved side 60 of a
respective extension portion 54.
The teeth 270 (comprised of tooth 270a and 270b) extend radially
inwardly from a bottom 278 of the body 268. Each tooth 70a, 70b extends the
length of the bottom 278 of the body 268 and extends parallel to the other. An
angled surface 280 and the teeth 270 cooperate to define a recess 284.
The foregoing description of the embodiments has been provided for
purposes of illustration and description. It is not intended to be exhaustive or to
limit the disclosure. Individual elements or features of a particular embodiment are
generally not limited to that particular embodiment, but, where applicable, are
interchangeable and can be used in a selected embodiment, even if not specifically
shown or described. The same may also be varied in many ways. Such variations
are not to be regarded as a departure from the disclosure, and all such
modifications are intended to be included within the scope of the disclosure.
Claims (17)
1. A pipe-fitting comprising: a coupling including a bell defining a pipe insertion mouth at an end of the coupling and an inner recess; and a flexible pipe-restraint gasket assembly disposed within the inner recess, the gasket comprising: a flexible annular body; a plurality of discrete gripping members extending axially from the annular body, wherein the gripping members are circumferentially spaced; and a plurality of extension portions extending from the annular body, each extension portion disposed between an adjacent pair of gripping members and defining a pocket comprising opposing walls, wherein the opposing walls are non-parallel and diverging relative to each other.
2. The pipe-fitting of claim 1, wherein the opposing walls are curved.
3. The pipe-fitting of claim 1 or claims 2, wherein the pocket includes a width, and wherein each extension portion is configured to collapse thereby reducing the width of the pocket.
4. The pipe-fitting of any one of the preceding claims, wherein each gripping member includes a bottom surface and a top curved surface.
5. The pipe-fitting of claim 4, wherein teeth extend from the bottom surface of each gripping member.
6. The pipe-fitting of claim 5, wherein each gripping member includes a first angled surface and a second angled surface that cooperate to form a recess between two of the teeth.
7. The pipe-fitting of any one of the preceding claims, wherein the body and the extension portions are made of an elastomeric material, and wherein the plurality of gripping members are made of a metallic material.
8. The pipe-fitting of any one of the preceding claims, wherein the gripping members contact one another 360 degrees around a pipe once the gripping members grip the pipe.
9. The pipe-fitting of any one of the preceding claims, wherein the bell includes a ridge and a sloping portion extending from the ridge, and wherein the ridge and the sloping portion cooperate to define the inner recess.
10. The pipe-fitting of claim 9, wherein a bulbous portion is disposed at an end of the ridge, and wherein the bulbous portion protrudes inwardly past an inner surface of the ridge.
11. The pipe-fitting of claim 10, wherein the bulbous portion protrudes outwardly past at least a portion of an outer surface of the ridge.
12. The pipe-fitting of claim 11, wherein the inner surface of the ridge and a line tangent to the bulbous portion in a direction parallel to a center axis of the coupling forms an angle.
13. The pipe-fitting of claim 12, wherein the angle is between 15 degrees and 20 degrees.
14. The pipe-fitting of claim 13, wherein a thickness of the bulbous portion is greater than a thickness of the ridge.
15. A pipe-restraint gasket assembly comprising: a flexible annular body; a plurality of discrete gripping members extending axially from the annular body, wherein the gripping members are circumferentially spaced; and a plurality of extension portions extending from the annular body, each extension portion disposed between an adjacent pair of gripping members and defining a pocket comprising opposing walls, the at least one extension portion defining a pocket, wherein the opposing walls are non-parallel and diverging relative to each other.
16. The pipe-restraint gasket assembly according to claim 15, wherein the opposing walls are curved.
17. The pipe-restraint gasket assembly according to claim 15 or claim 16, wherein the pocket includes a width, and wherein each extension portion is configured to collapse thereby reducing the width of the pocket.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/053010 | 2018-08-02 | ||
US16/053,010 US11112038B2 (en) | 2018-08-02 | 2018-08-02 | Pipe-fitting |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ755205A NZ755205A (en) | 2020-10-30 |
NZ755205B2 true NZ755205B2 (en) | 2021-02-02 |
Family
ID=
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