AU603664B2 - Improvements in high pressure brassware - Google Patents

Description

Australian attorney THE COMMISSIONER OF PATENTS This form must be accompanied by either a provisional specification (Form 9 and true copy) or by a complete specification (Form 10 and true copy).

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COMMONWEALTH OF AUSTRALIA PATENTS ACT, 1952 COMPLETE SPECIFICATION FOR OFFICE USE Short Title: Int. C1.

Application Number: Lodged: Complete Specification Lodged Accepted:'.

Lapsed: Published: C Ci c cL

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Priority: Related Art: TO BE COMPLETED BY APPLICANT Name of Applicant:' Clive Breen Address of Applicant: 11 Barjadda Avenue SYLVANIA N.S.W. 2224 Actual Inventor: Address for Service: Clive Breen ANDERSON-TAYLOR ASSOCIATES, Registered Patent and Trade Mark Attorneys of Carina Road Oyster Bay N.S.W. 2225 ii Complete Specification for the invention entitled: IMPROVEMENTS IN HIGH PRESSURE BRASSWARE The following statement is a full description of this invention including the best method of performing it known to me:- -1li i THE COMMISSIONER OF PATENTS.

(IMPORTANT Cross out inapplicable words in the above Form.) This invention relates to plumbing fittings and more particularly to bib cocks and stop cocks.

With existing fittings of this type it is necessary to completely shut off the mains supply in order to replace a faulty washer or valve assembly in the cock. Accordingly many people such as women or elderly persons living in apartments where the location of the mains supply is not readily accessible often require the services of a plumber for what is otherwise a relatively simple operation. Also in commercial or industrial situations any shutdown of Odle* a water or air supply etc. obviously costs time and money.

0 00 0 0 9 0 00 S.a S It is therefore an object of this invention to ameliorate 0S000 the aforementioned disadvantage by providing an improved readily serviced stop cock or bib cock. Accordingly a bib cock or stop cock is disclosed which includes a 0000 housing having an inlet port, an outlet port and a valve 0 0 0 °0 0 seat therebetween, a first valve member within said housing and movable into and out of engagement with an upper face of said valve seat and a second valve member ,me axially aligned and abutting said first valve member but separate therefrom, whereby movement of said first valve member to its fully disengaged position allows said second valve member to move u--vard under inlet fluid pressure to engage an underside face of said valve seat Ito thereby close off fluid flow upstream of said first -2-

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IC valve member to allow servicing of said first valve member, and said second valve member comprising a disk-shaped head and a downwardly extending stem of circular cross-section, the axial alignment of said second valve member being maintained by said stem slidably fitting within a sleeved plug removably threaded into an aperture in the.bottom of said housing directly below said second valve member and said aperture being dimensioned to allow initial insertion and subsequent servicing of said second valve member without removal of said first valve member.

Several embodiments of this invention will now be described 0 0 o 0o 00 0 0 00 00 0 *0 00 03 @00000 0 0 0 0 0000 0 )1 0 O; 0 0 00 t L 0 000 -2Aj ii

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with reference to the attached drawings in which: Figures 1 and 1A show a schematic view of a high pressure bib cock in partial crosssection, Figure 2 Figures 3 Figures 4 shows a high pressure stop cock in partial cross-section, and 3A show a right angle hose stop cock in partial cross-section and inlet port insert, and 4A show pillar cock in partial crosssection and inlet port insert, shows a stop cock assembly for a bath, shower or basin set in partial cross-section, o 0 o o 0 o o o 00 09 *i 8 Or0 9 8? o* 8 0 00 *L 9 0 0 000 Figure 5 Referring first to figures 1,'iAand2 the bib cock or stop cock comprises a valve housing 1 with an inlet port 2, outlet port 3 and a valve seat 4 therebetween. A valve member is disposed above this seat and is movable (by rotation of threaded spindle 6) between the position shown in figure 1 wherein it engages the upper face of seat 4 and the disengaged position of figure 1A wherein it is clear of the seat. In accordance with this invention an additional valve member 7 is located directly below andthe stem. 7A thereof is movable within a sleeve 7B in a plug 8 so as to engageor disengage the underside face of seat 4. Preferably the two valve members are axially aligned and abut at their centres as shown so that when valve 5 is either fully closed or -3x; n partially open valve member 7 remains clear of seat 4 and is thus open to flow. As the primary valve member 5 is raised to its fully open position however valve member 7 is allowed to move progressively upwardly (either by spring force or water pressure in the inlet port) and finally seal against the underside of seat 4.

The result of this action to a user is that the cock operates in the usual fashion to regulate fluid flow when the spindle 6 and valve 5 are turned down to their closed or partially open position. If servicing of valve member is required however turning the spindle S to the conventional "fully open" position causes o @o o valve member 7 to shut off the flow below seat 4 and allow oo disassembly and servicing of the upper section of the housing and/or valve member 5 without interruption of the mains supply to other outlets. After re-assembly the valve would resume normal operation by simply turning down spindle 6 again to Sits closed or partially open position whereby the flow 0oo freely passes valve member 7 and is controlled solely by valve member gi e t ac A removable plug 8 may also be threaded into the lower wall of the bib cock or stop cock housing 1 to facilitate the initial assembly or servicing of valve member 7.

Other types of valves -4- 1 L_ L i i l i

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are shown in figures 3 to 5 wherein the aforementioned components are indicated by the same numbers.

In the case of the hose stop cock and pillar cock (figures 3, 3A, 4 and 4A) where the inlet is located directly below valve 7 a diametrical insert 9 may be fitted within port 2 to slidably support the valve stem while at the same time allowing free flow through said port.

A further variation of a bib cock is shown in figure 6. In this case there is no need for fitting a removable plug into the lower section of the housing 1. Instead the seat 4 includes a removable insert O a I0 section 4A so as to allow access to the inlet port 2 for assembly or servicing of the valve member 7. Preferably this 11o 00o0 section 4.A is threaded to screw into position and its central 0 bore may be shaped to receive a tool to facilitate removal.

It will thus be appreciated that this invention at least 000 in the form of the embodiments described comprises a novel and unique improvement to existing plumbing valves. Clearly however the examples disclosed are only the currently preferred forms of this invention and a wide variety of modifications may be made which would be apparent to a man skilled in the art. For example the shape and configuration of the valve assemblies and seat may be modified according to application or design-preference. Also the invention is not limited to any specific material of construction.

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Claims (3)

1. 2. The bib cock or stop cock as claimed in claim 1 wherein said first valve member is moved into and out or engagement with the upper face of said valve seat by means of a spindle. -6- 110
2. 3. The bib cock or stop cock as claimed in claim 1 or claim 2 wherein movement of said second valve member into engagement with the underside of said valve seat is assisted by a spring.
3. 4. A bib cock or stop cock substantially as described herein with reference to figures 1, 1A 2 or figure Dated this 16th day of August, 1990 Clive Breen By His Patent Attorney a MICHAEL ANDERSON-TAYLOR o 0 b a t 6 4 B e g 4" A I 0 a. a a) a. -7- i' -:ii i