U.S. patent application number 11/714145 was filed with the patent office on 2007-10-11 for drain, particularly for use in a gravity-fed drainage system.
Invention is credited to Rodney Paul Knight.
Application Number | 20070236002 11/714145 |
Document ID | / |
Family ID | 38574446 |
Filed Date | 2007-10-11 |
United States Patent
Application |
20070236002 |
Kind Code |
A1 |
Knight; Rodney Paul |
October 11, 2007 |
Drain, particularly for use in a gravity-fed drainage system
Abstract
A connection includes a first female member and a second male
member. Engageable threads are provided on the inner surface of the
female member and the outer surface of the male member. At least
one slot is formed in the threads on the inner surface of the
female member or in the threads on the outer surface of the male
member or both, the slot or slots extending substantially
longitudinally of the female member and/or the male member. Each of
the slots has a depth greater than the depth of the threads so that
when the male member is engaged in the female member, a passageway
or passageways past the threads is provided by the slot or
slots.
Inventors: |
Knight; Rodney Paul;
(Auckland, NZ) |
Correspondence
Address: |
YOUNG & THOMPSON
745 SOUTH 23RD STREET
2ND FLOOR
ARLINGTON
VA
22202
US
|
Family ID: |
38574446 |
Appl. No.: |
11/714145 |
Filed: |
March 6, 2007 |
Current U.S.
Class: |
285/18 ;
4/679 |
Current CPC
Class: |
E03C 1/20 20130101 |
Class at
Publication: |
285/018 ;
004/679 |
International
Class: |
E03C 1/12 20060101
E03C001/12 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 8, 2006 |
NZ |
545769 |
Claims
1. A connection comprising a first female member and a second male
member, engageable threads on the inner surface of the female
member and the outer surface of the male member, at least one slot
formed in the threads on the inner surface of the female member or
in the threads on the outer surface of the male member, or both,
the slot or slots extending substantially longitudinally of the
female member and/or the male member, the or each slot having a
depth greater than the depth of the threads so that when the male
member is engaged in the female member, a passageway or passageways
past the threads is provided by the slot or slots.
2. A connection as claimed in claim 1, wherein there are a
plurality of slots.
3. A connection as claimed in claim 2, wherein there are four
slots.
4. A connection as claimed in claim 1, wherein the slots are
provided in the female member.
5. A connection as claimed in claim 4, wherein the slots extend
downwardly to a depth such that in use the slot extends past the
threads in the male member.
6. A connection as claimed in claim 1, wherein the male and the
female members are substantially open at each end thereof.
7. A connection as claimed in claim 1, wherein the slots taper
inwardly away from the end from which the slot extends.
8. A connection as claimed in claim 1, wherein the side walls of
the slot are shaped so that the closed face of the slot is narrower
than the open face of the slot.
9. A drainage member comprising a female member substantially open
at each end, threads on the inner surface of the female member, at
least one slot formed in the threads on the inner surface of the
female member, the slot or slots extending longitudinally of the
female member and the or each slot having a depth greater than the
depth of the threads so that the slot or slots provide a passageway
or passageways past the threads in use.
10. A drainage member as claimed in claim 9, wherein a plurality of
slots are provided.
11. A drainage member as claimed in claim 10, wherein four slots
are provided.
12. A drainage member as claimed in claim 9, wherein the slots
taper inwardly away from the end from which the slot extends.
13. A drainage member as claimed in claim 9, wherein the side walls
of the slot are shaped so that the closed face of the slot is
narrower than the open face of the slot.
14. A drainage construction comprising a first female member and
second male member, co-operating threads on the inner surface of
the female member and the outer surface of the male member, at
least one slot being formed in the threads on the inner surface of
the female member or in the threads on the outer surface of the
male member, or both, the slot or slots extending substantially
longitudinally of the female member or the male member, the or each
slot having a depth greater than the depth of the threads across
which the slot is provided so that when the male member is engaged
in the female member a passageway or passageways past the threads
is provided by the slot or slots.
15. A drainage construction as claimed in claim 14, wherein a
plurality of slots are provided.
16. A drainage construction as claimed in claim 15, wherein there
are four slots.
17. A drainage construction as claimed in claim 14, wherein the
slots extend downwardly to a depth such that in use the slot
extends past the threads in the male member.
18. A drainage construction as claimed in claim 14, wherein the
slots taper inwardly away from the end from which the slot
extends.
19. A drainage construction as claimed in claim 14, wherein the
side walls of the slot are shaped so that the closed face of the
slot is narrower than the open face of the slot.
20. A drainage construction as claimed in claim 14, wherein the
slots are provided in the female member.
21. A drainage construction as claimed in claim 14, wherein the
male and female members are open at each end.
22. A drainage construction as claimed in claim 14, wherein the
male and female member have spaced apart flanges at the inlet end
of there of in use, a space being defined between the flanges when
in use, the passageway or passageways extending from the space to
the open lower end in use of the female member.
Description
FIELD OF THE INVENTION
[0001] This invention relates primarily to drains and has been
devised particularly, though not necessarily solely, for use as a
drain in a gravity-fed drainage system.
[0002] Most drains presently available for use in gravity-fed
drainage systems, such as shower drains, have male and female
members which are engagingly threaded so that the male member may
be screwed into the female member in such a way that peripheral
flanges on the female and male member respectively are positioned
in use above and below the supporting structure, for example, the
shower tray. A seal, such as a compressible o-ring, is then usually
positioned between the underside of the tray and the upper surface
in use of the flange on the female member. This construction causes
a space to be created between the flanges on the male member and
the female member into which water can become positioned, for
example, if the drain is poorly installed or if there is matter,
such as a splinter of wood, leading to distortion of the seal. If
the o-ring seal inadequately seals between the flange on the female
member and the underside of the tray water can leak through the
space and in time can cause damage to the supporting floor. If the
floor is wooden ultimately parts of the floor may rot away. This,
of course, is disadvantageous.
SUMMARY OF THE INVENTION
[0003] It is, therefore, an object of the present invention to
provide a connection and/or a drainage member and/or a drainage
construction which will obviate or minimize the foregoing
disadvantages in a simple yet effective manner or which will at
least provide the public with a useful choice.
[0004] Accordingly, in one aspect, the invention consists in a
connection comprising a first female member and a second male
member, engageable threads on the inner surface of the female
member and the outer surface of the male member, at least one slot
formed in the threads on the inner surface of the female member or
in the threads on the outer surface of the male member or both, the
slot or slots extending substantially longitudinally of the female
member and/or the male member, each of the slots having a depth
greater than the depth of the threads so that when the male member
is engaged in the female member, a passageway or passageways past
the threads is provided by the slot or slots.
[0005] Preferably, there are a plurality of slots.
[0006] Preferably, there are four slots.
[0007] Preferably, the slots are provided in the female member.
[0008] Preferably, the slots extend downwardly to a depth such
that, in use, the slot extends past the threads in the male
member.
[0009] Preferably, the male and the female members are
substantially open at each end thereof.
[0010] Preferably, the slots taper inwardly away from the end from
which the slot extends.
[0011] Preferably, the side walls of the slot are shaped so that
the closed face of the slot is narrower than the open face of the
slot.
[0012] In a further aspect, the invention consists in a drainage
member comprising a female member substantially open at each end,
threads on the inner surface of the female member, at least one
slot formed in the threads on the inner surface of the female
member, the slot or slots extending longitudinally of the female
member and the or each slot having a depth greater than the depth
of the threads so that the slot or slots provide a passageway or
passageways past the threads in use.
[0013] Preferably, a plurality of slots is provided.
[0014] Preferably, four slots are provided.
[0015] Preferably, the slots taper inwardly away from the end from
which the slot extends.
[0016] Preferably, the side walls of the slot are shaped so that
the closed face of the slot is narrower than the open face of the
slot.
[0017] In a still further aspect the invention consists in a
drainage construction comprising a first female member and second
male member, co-operating threads on the inner surface of the
female member and the outer surface of the male member, at least
one slot being formed in the threads on the inner surface of the
female member or in the threads on the outer surface of the male
member, or both, the slot or slots extending substantially
longitudinally of the female member or the male member, the or each
slot having a depth greater than the depth of the threads across
which the slot is provided so that when the male member is engaged
in the female member, a passageway or passageways past the threads
is provided by the slot or slots.
[0018] Preferably, a plurality of slots is provided.
[0019] Preferably, there are four slots.
[0020] Preferably, the slots extend downwardly to a depth such
that, in use, the slot extends past the threads in the male
member.
[0021] Preferably, the slots taper inwardly away from the end from
which the slot extends.
[0022] Preferably, the side walls of the slot are shaped so that
the closed face of the slot is narrower than the open face of the
slot.
[0023] Preferably, the slots are provided in the female member.
[0024] Preferably, the male and female members are open at each
end.
[0025] Preferably, the male and female member have spaced apart
flanges at the inlet end of there of in use, a space being defined
between the flanges when in use, the passageway or passageways
extending from the space to the open lower end in use of the female
member.
[0026] To those skilled in the art to which the invention relates,
many changes in construction and widely differing embodiments and
applications of the invention will suggest themselves without
departing from the scope of the invention as defined in the
appended claims. The disclosures and the description herein are
purely illustrative and are not intended to be in any sense
limiting.
BRIEF DESCRIPTION OF THE DRAWINGS
[0027] One preferred form of the invention will now be described
with reference to the accompanying drawings in which,
[0028] FIG. 1 is a cut-away perspective view of a female member for
use in the invention,
[0029] FIG. 2 is a perspective top view of the female member of
FIG. 1,
[0030] FIG. 3 is a cross-sectional view of a connection or drainage
constructions according to one preferred form of the invention,
and
[0031] FIG. 4 is a further part cross-sectional view of the
construction of FIG. 3.
DETAILED DESCRIPTION OF THE DRAWINGS
[0032] Referring to the drawings a connection, a drainage member
and/or a drainage construction are provided as follows. A female
member 1 is provided which is open at end 2 and opposite end 3. In
the embodiment shown in FIG. 1 the opening at the end 2 is of
substantially larger diameter than the opening at end 3 but this
will depend upon the purpose and geometry of the construction in
which the drainage member is to be used. A cylindrical section 4 is
provided into which internal threads 5 are cut.
[0033] One or more slots, and preferably a plurality such as four
slots, are provided across the threads 5. The slot or slots 6 are
preferably shaped so that the female member can be formed by the
use of a collapsing core mould to facilitate the speed of operation
of the mould. Thus, for example, the slots 6 may taper from the
upper end 7 to the lower end 8 at an angle as can be determined for
the particular use to which particularly the female member is to be
put. In the embodiment shown in FIGS. 1 and 2, which are for use as
a shower tray drain, the angles may be about 7 degrees. It can also
be seen that the side walls, for example, 9 and 10 of the slot, can
be shaped, such as curved, so that the back wall of the slot 6 is a
little narrower than the open space opposite the back wall of the
slot 6.
[0034] The slots 6 are provided so that they extend inwardly a
greater distance than the threads. This can be clearly seen for
example in FIG. 1. Again the exact distance that the slots extend
past the threads will depend on the actual use to which the
embodiment is put but in the embodiment shown in FIG. 1 the depth
is for example, two to three times the depth of the threads. At the
bottom of the slot 6 a ledge 12 is provided and in such a
construction the ledge 12 must be at a position lower than the
maximum downward extent of threads 20 on an inner male member 21.
The male member 21 is also open at the upper end 22 and the lower
end 23 thereof. Thus for example, the lower end 24 of the threads 5
terminates below the lower end 25 of the threads 20. Referring to
FIG. 4 it can be seen that ledge 12 is therefore below the position
of the lower end 25.
[0035] In alternative constructions the slots 6 could be cut into
the male member 21 or indeed slots could be provided in both
members.
[0036] In other embodiments of the invention again depending on the
geometry of the construction ledge 12 may not be provided, for
example, where the inlet and outlet opening of the female member
are substantially similar in diameter.
[0037] In use the female member 2 is brought up under the, for
example, shower tray 30 so that an outwardly extending flange or
rim 31 for example, having an upstand 32 butts the underside of the
tray 30 and the male member is then screwed into the female member
so that an outwardly extending rim 35 on the male member abuts the
upper surface of the tray 30. An o-ring 36 may provide a seal
between the underside of the member 30 and the flange 31. The
provision of the slots 6 mean that any water collecting between the
flanges 35 and 31 will drain to the outlet of the female member
through the slots 6.
[0038] Thus, it can be seen that at least in the preferred form of
the invention, a connection and/or a drainage member or drainage
construction are provided which have the advantage that any water
collecting in the vicinity of the flanges which clamp above and
below the supporting structure, such as a shower tray, will tend to
drain away from that position through the slot or slots 6. It is a
particular advantage of the construction of the preferred form of
the construction that a collapsing core mould can be used for high
speed production of the female member. Furthermore, the slots 6
reduce any tendency for capillary action up the threads to
occur.
* * * * *