AU2004100383A4 - Valve assembly - Google Patents

Description

4-MAY-004 14!29 A J PARK 64 4 472 3358 P.03/16 Regulation 3.2

AUSTRALIA

PATENTS ACT, 1990 COMPLETE SPECIFICATION FOR AN INNOVATION PATENT

ORIGINAL

Name of Applicant: Actual Inventor; Address for service in Australia: Invention Title: WILLIAM DOUGLAS MCKEE William Douglas MCKEE A J PARK, Level 11, 60 Marcus Clarke Street, Canberra ACT 2601, Australia Valve Assembly The following statement is a full description of this invention, including the best method of performing it known to me.

COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24 24-MAY-2004 14:29 A J PARK 64 4 472 3358 P.4/16 VAXXE FPEmD OFP THE I ENTION Q This invention relates to a valve assembly.

The valve assembly of an embodiment of the present invention is particularly adapted to be used within an animal feeding teat. However, other uses of the valve assembly of the present invention are also contemplated.

BACKGROT ND TO TE TNVENTTON Traditionally animal feeding teats operate by the feeding animal sucking on the teat to start the flow of liquid. The disadvantage of such teat assembly is that if the opening in the nipple of the teat becomes ripped or broken, the liquid will spill out of the teat even when the animal is not sucking on the teat. Other traditional teats also have the disadvantage that once liquid is flowing through the teat, it will only stop once all the liquid is emptied from the receptacle the teat is attached to. This can cause the animal feeding from the teat to choke on the liquid, or allow spillage and waste of liquid.

Another disadvantage of many traditional feeding teat assemblies is that if the animal pulls the teat to one side, liquid will not flow through the teat. Such teats need to be kept substantially in line with the liquid outlet to operate.

Some teats known in the art contain a valve assembly which operates under the force of gravity to close the valve once it has been opened. The disadvantage of such a teat valve assembly is that it will only operate effectively if the teat is substantially vertical to the ground.

One such invention is described in NZ 110 435. This patent discloses a tubular nozzle that is attached to a container and fitted with an internal rubber covered valve. The free peripheral edge of the nozzle is formed into an upturned flange with curled portion of a flexible teat fitting over and between the flange and the perpendicular wall of the nozzle, with a portion of the teat lying flat against the wall to make an airtight seal. The valve is gravity operated and the teat must be hanging vertically or near vertically for the valve to close.

la- COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24 24-MY-2004 14:29 A J PARK 24-%?v-204 ±:29P JP%1I<64 4 472 335B P.05/16 The invention described in NZ 102 401 is a tubular nozzle fitted to the lower end of a fbod containing vessel with a resilient teat attached to its end. Inside the nozzle is a valve.

which consists of a metallic ball-head wit a depending stein to the lower end of which is fitted a rubber knob. When an animal sucks the teat, the valve is displaced upwardly and liquid can flow through the teat. When the animnal releases the teat, the valve is closed by gravity and no liquid can flow. This construction is also limited to use where the teat hangs vertically or near vertically.

The invention described in NZ 39 125 comprises a containing-vessel for a liquid with a concave or sloping bottom, an angular outlet with a rubber teat at the end thereof for an anima to suck. Within the vessel is a float valve, which may be closed against its seat by the operation of a float or by hand.

In NZ 35 868, there is described a means employed for feeding calves and the like with liquid food. According to this invention, a reservoir for the liquid has a false bottom in which is a valve adapted to close by gravity. A sliding tray beneath the bottom is provided with a float upon one end of a pivoted lever, the other end of which engages a downwardly projecting stemn of the valve. The liquid in the tray is thus kept at a predetermined level by the rise and fal of the float. A branch pipe from the tray is connected by a, rubber tube or similar flexible connector with a running-pipe supplying the liquid to the animals. Wastage is prevented by locating the orifices from the pipe to the teats on a level with, or slightly higher than, the surface of the liquid in the tray.

The invention in US 563 8769 discloses a teat comprising a hollow body mde of a resilient material. The body has an inlet and an outlet end. T1he outlet end includes at least one slit through the wall of the body. This slit(s) does not extend into that area of the wall of the body which formns the extremity of the outer end. Engaged with the inlet and is a valve biased by a spring. As an animal suckles on the teat a pressure diffecrential.

formsa within. This suction causes the valve to open allowing liquid to fill the tat. When the suction is removed the valve closes. The closed valve prevents any baclcflow when the teat is squleezed& GB 2 267 549 discloses a teat valve comprising an apertured closure member which cooperates with a tubular seat and an elastic sleeve which houses both the member and the seat and urges them into sealing engagement When the sleeve is stretched, the valve opens allowing passag. of liquids/solublos and gases, and when released returns to its original position, thus closing the valve.

-2- COMS ID No: SBMI-00762406 Received by IP Australia: Time (H~rm) 12:17 Date 2004-05-24 ;24-MAY-2004 14:30 A J PARK 64 4 472 3358 P.06/16 It is an object of the present invention to provide a combination of a valve assembly and an animal feeding teat which will go some way towards overcoming the above-mentioned disadvantages or which will at least provide the public with a useful choice.

DISCLOSURE OF INVENTION In accordance with an aspect of the present invention, there is provided a combination of a valve assembly and an animal feeding teat for delivering a feed fluid to an animal, said teat including: an outer casing having a resiliently flexible teat part, a first aperture at an end of the casing opposite the teat part connectable to a source of the feed fluid, and a second aperture in said resiliently flexible teat part of said casing through which the feed fluid can flow to feed the animal, and said valve assembly including: a valve member including a piston shaft with a piston head at a first end of said piston shaft and a valve head at an opposite end of the piston shaft, and which is moveably mounted in said teat so that said valve head of said valve member can seat against said first aperture on one side and said piston head is on an opposite side of said aperture, within said outer casing, and a spring co-operable with said piston head, which said spring biases said valve member so that said valve head normally covers said first aperture at least when said teat and valve assembly are in a substantially horizontal orientation, but allows pressure on said piston head against said spring to unseat said valve head and open said first aperture to allow feed fluid to flow through said first aperture into said outer casing and subsequently out of said second aperture.

Preferably the outer casing including the resiliently flexible teat part and first and second apertures is a one-piece body.

Preferably the assembly is configured such that the valve head is unseated when the teat part is pulled forcefully to the side to allow feed fluid to flow through said first aperture into said outer casing and subsequently out of said second aperture.

-3- COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24 24-MA€Y-200 4 14 :30 3 PARK 64 4 4?2 3352 P.07/16 Preferably the end of the casing opposite the teat part includes a neck portion configured to mount the teat to a receptacle with the valve head located inside the receptacle.

Preferably the piston head is bulbous in shape.

Preferably the piston head is tapered at the end remote from the valve head.

Preferably the spring is a coil spring.

Most preferably the spring is comprised of stainless steel.

Preferably the spring is coiled around the piston shaft.

Preferably the piston head contains at least one recess.

Preferably the piston shaft, piston head and valve head are formed as one unit, Preferably that unit is comprised of nylon.

In one alternative sutlicient pressure can be applied to the piston head by an animal's mouth or teeth. In another alternative, sufficicnt pressure can be applied to the piston head by the atmosphere on the outer easing when an animal sucks on the teat thereby creating a partial vacuum within the teat.

Preferably the second aperture is located at an end of the teat pait.

Preferably the teat is comprised of either a durable pliant synthetic material or rubber.

The rubber may be natural or synthetic.

Preferably said spring biases said valve head to cover said first aperture when said piston shaft is in any orientation.

Preferably said piston head is substantially conical in shape.

Preferably said valve head bears directly against said casing to cover said first aperture.

-4- COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24 24-MAY-2004 14*30 A J PARK 24-riy-004 14:0 PJ PRI<64 4 472 3358 P.02/16 The invention may also be said broadly to consist in a combination substantially as herein described with reference to tho accompanying drawings.

This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all comb inations of any two or more of said parts, elemeuts or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth.

This invention consist in the foregoing and also envisages constructions of which the following gives examples.

H

One prefered form of the present invention will now be described with reference to the accompanying drawings in which: Figure 1 shows a side elevational view of the valve assembly of the present invention.

Figure 2 shows a sectional side elevation view of the valve assembly of the present invention when located inside a teat and wherein the valve bead is in a closed position.

Figur 3 shows a sectional side elevation view of the valve assembly of the present invention when located inside a teat and Wherein the valve head is in an open position.

Figure 4 is an end elevational view of the piston bead viewed from the left side of Figure I1.

In the Preferred tbnn of the invention shown in Figur 1, the valve assembly is comprised of a piston shaft 10 with a piston head 12 attached. In a preferred form of the invention the piston head 12 is bulbous, tapered to a point 13 and contains two recesses (3 8, 3 8) that assist in the flow of fluid through the teat. A valve bead 14 is connected to the piston shaft 10, at th, opposite end of the shaft 10 from the piston head 12. A biasing means 16 rests against the piston head 12 and is located along the piston shnft 10. Preferably the biasing means 16 is a spring. Preferably the spring is a coil spring. Most preferably the spring is comprised of stainless steel.

COMS ID No: SBMI-00762406 Received by IP Australia: Time (I-tm) 12:17 Date 2004-05-24 24-MAY-2004 14-'3j1lJPV<G 4235 .9 A J PARK 64 4 472 3358 P.09/16 Optionally, the piston head 12, piston shaft 10 and valve head 14 may be moulded as one piece of material. The material is preferably nylon but any other inert rigid materialwould be suitable.

Figures 2 and 3 shows a preferred embodiment of the present invention wherein the valve assembly is substantially contained within an animal feeding teat 17. The valve assembly may be fitted inside the animal feeding teat 17 by passing the valve assembly piston head 12 first through the second aperture 22 and then through the guideway 32 until it is in the position as shown in figure 2.

The embodiment in the figurs shows the teat fitted to an undefined receptacle 20. The teat may be fitted to an animal feeding bowl, a bottle, or a hose without departing from the scope of the invention. 'Fittings for use in hose types are well known in the dairying industry.

In the embodiment shown in Figure 2, the animal feeding teat 17 is comprised of an outer casing 18 having a head portion 24, a shoulder portion 26 ad a neck portion 28 between the heed and shoulder portion. The outer casing 18 has a first aperture 22 and a second aperture 30. The valve head 14 of the valve assembly prtrumdes through the first aperture 22 at oneand oftheoouter casing 18.

In the preferred embodiment shown in Figures 2 and 3, the animal feeding teat 17 is attached to a receptacle 20 (the boundary of which is shown by broken lines in Figures 2 and 3) at toe end of the casing which contains the first aperture 22. The teat 17 may be pawsed from the outside of the receptacle, aperture end 22 first, through a circular hole in the receptacle 20 until the edge of the hole rests in a fluid tight fit in neck portion 28 of' teat 17. Alternatively, the teat is passed from the inside of the receptacle, aperture end firt tough a circular hole in the receptacle until the edge of the hole rests in a fluid-tigh fit in the neck portion 28 of the teat As shown in Figures 2 and 3, the valve head 14 protrudes from the firs aperture 22 and is located inside the receptacle The head and shoulder portion 24, 26 are solid apart from a guideway 32 tbrough the centre. The piston shaft 10 moves freely within the guideway 32. The spring in conjunction with the convex valve head 14 act to keep the valve assembly in a centred position. The piston shaft is of a diameter smiall enough to allow fluid to flaw freely through the guideway.

-6- COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24 24-IMfY-20034 14*31lJPRI 4442332P 01 R J PARK 64 4 472 335e P-10/16 The receptacle 20 is intended to contain a liquid. The liquid may be milk or other animal feed. The liquid may comprise nutrients gr medicinal supplements. In use, the valve head 14 is thus submerged in liquid within the receptacle 20, and the outer casing 18 may protrude from the receptacle substantially horizontally or downwardly. The valve assembly of the present invention will operate effectively when positioned at any angle.

The valve assembly of the prescnt invention operates as follows. An animal exerts pressure in the direction of the arrows A by biting or squeezing the teat (see Figure 3).

This pressure forces the piston head 12 to move in the direction of the arrow B and compresses the biasing means 16. This in turn moves the valve head 14 away from the first aperture 22. In Figure 3 the valve head 14 is thus unseated from the aperture 22.

This allows the flow of liquid from the receptacle 20, through the first aperture 22 into the teat 17, then through the second apertur 3 0 and into the animal's mouth.

When the animal releases its bite and pressure is removed from the outer casing 18 and the piston bead 12, the biasing means 16 forces the piston head 12 to move in the direction ofte arrow E (see Figur 2) and returns the yv!lve head 14 to seat over the first aperture 22 and thus prevent the flow of liquid through the first apertur 22 and into the teat 17.

In an alternative embodiment it is the atmosphere that applies pressure in toe direction of arrows A. This happens when a partial vacuum is created inside that teat as a result of an animial sucking on the teat. In the same manner as describe above, the pressure forces the piston head 12 to wove in the direction of the arrow B and compresses the biasing means 16. This in turn moves the valve head 14 away from the fir-st aperture 22. In Figure 3 the valve head 14 is thus unseated from the aperture 22. This allows the flow of liquid from the receptacle 20, through the fint aperture 22 into the teat 17, then through the second apertur 30 and into the animal's mouth.

When the animal stops suacing the pressure differenitial dissipates, effectively removing tepressure from the outer casing 18 and the piston bead 12, the biasing means 16 forces the piston head 12 to move in the direction of the arrow B (see Figure 2) and returns the valve head 14 to seat over the first aperture 22 and thus prevent the flow of liquid trough the first aperture 22 and into the teat 17.

The advantages of the valve assembly when contained within an animal feeding teat as described herein are as follows. The teat valve assembly of the present invention can operate effectively at any angle. It is not restricted to use in a vertical position as it is not -7- COMS ID No: SBMI-00762406 Received by IP Australia: Time (I-Ur) 12:17 Date 2004-05-24 24-MAY-2004 14:32 A J PARK 244lY-00414:2 PJ P~k64 4 472 3352 P.ii/16 reliant upon gravity forces to close the valve to prevent the flow of liquid from the teat.

A further advantage is that the teat valve assembly operates effectively even when there is a large aperture in the nipple of the tat. In traditional animal feeding teats that do not have a shut-off valve, only small apertures can be used in the teat nipple or liquid will spill out very easily. The advantage of such a large apertare in the nipple of the teat is that foreign bodies are lass likely to get caught therein and thus the teat is more hygienic.

The teat valve assembly of the present invention is easy for animals, such as lambs or calves, to feed from. This is because the animal need only squeeze or bite the teat to start the flow of liquid. In comparison, many traditional teats require the animal to suck the teat or squeeze up and down on the teat to obtain liquid. The teat valve assembly will also operate to open the valve and allow the flow of liquid when the teat is pulled forcefully to the side.

It is envisaged that the valve assembly ofte present invention could be inserted into any standard or conventional teat to operate. However, the present application describes a preferential embodiment of a teat into which the valve assembly of the present invention can be inserted.

Even if the outer teat becomes. worn or damaged, the valve assembly will continua to operate and effectively, preventing the flow of liquid unless pressure is applied to the piston heed If the outer teat becomes completely destroyed, it is envisaged that the valve assembly could be recycled and placed in a new outer casing or teat.

Other embodiments of the invention will be apparent to those skilled in the art.

COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24

Claims (1)

1. 24-MAY-2004 14:32 A J PARK 24-~iV200 ±:32P JPFVI<64 4 472 3352 P. 12/16 THB C)LAIMS DEFINING THE INVENTION ARE AS FOLLOWS: I1. A comnbination of a valve assembly and an animal feeding teat for delivering a feed fluid to an animal, said teat including: an outer casing having a resiliently flexible teat part, a first aperture at an end of the casing opposite the teat part connectable to a source of the feed fluid, and a second aperture in said resiliently flexible teat part of said casing through which the feed fluid can flow to feed the animal, said valve assembly including: a valve member including a piston shaft with a piston head at a first end of said piston shaft and a valve head at an opposite end of the piston shaft, and which is moveably mounted in said teat so that said valve head of said valve member can seat against said first aperture on one side and said piston head is on an opposite side of said apertures within said outer casing, and a spring co-operable with said piston bead, which said spring biases said valve member so that said valve head normally covers said first aperture at least when said teat and valve assembly are in a substantially horizontal orientation, but allows pressure on said piston head against said spring to unseat said valve head and open said first aperture to allow feed fluid to flow thorough said first aperture into said outer casing and subsequently out of said second aperture. 2. The combination of claim I wherein the outer casintg including the resiliently flexible teat part and first and second apertures is a one-piece body- 3. The combination of claim 1 or claim 2 wherein the assembly is configured such that the valve head is unseated when the teat part is pulled forcefully to the side to allow feed fluid to flow through said first aperture into said outer casing and subsequently out of said second aperture. -9- COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24 24-MAY-2004 14*32 A J PARK 64 4 472 3358 P.13/16 4. The combination of any one of the preceding claims, wherein the end of the casing opposite the teat part includes a neck portion configured to mount the teat to a receptacle with the valve head located inside the receptacle. A combination of a teat and valve assembly substantially as herein described with reference to the accompanying drawings. Dated this 24th day of May 2004 By their Patent Attorneys A J PARK On behalf of the Applicant Per: COMS ID No: SBMI-00762406 Received by IP Australia: Time 12:17 Date 2004-05-24