JPS591452B2 - Nipple cup with air inlet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a teat cup with an inflatable flexible liner for use in a milking machine.

The teat cup of a double-acting milking machine has a rigid shell that receives the teat and an inflatable elastic liner that constantly applies a vacuum to the cow's teat through the base of the teat cup, allowing the milk to flow into the cup. It is done like this.

A pulsating vacuum is applied to the inflatable chamber between the liner and the shell at a rate of 40 to 60 times per minute to inflate and deflate the elastic liner.

When the elastic liner receiving the nipple becomes distended (i.e.
When the inflatable chamber between the liner and the shell is removed,
, milk is extracted from the nipple.

This milk must be extracted from the liner through the base of the teat cup and into the milk feed hose at a sufficient rate so as not to interfere with the inflation and deflation movements of the liner.

In the teat cup disclosed in U.S. Pat. No. 3,476,085, an air-filled lobe plug is attached to the wall near the top of the base of the cup, and this plug contains a volume metered into the top of the base of the cup. A through hole is formed to introduce the atmosphere.

However, this air inlet is easily blocked by dried milk, flies, straw debris, etc.

According to the invention, the nipple cup shell and the elastic liner are provided with air inlets which allow atmospheric air into the liner through an annular chamber adjacent to the lower end of the liner and separate from the liner. be able to do so.

The atmospheric air introduced into the liner assists in the rapid evacuation of milk from the teat cup into the attached teat holder.

A feature of the invention is the provision of air inlets in the rigid shell such that the maximum flow rate of air introduced into the liner remains constant during operation.

Also, air filtering material is provided to prevent dust from entering the opal through those air inlets.

FIG. 1 shows an overall view of the nipple cup of the present invention.

The nipple cup 10 includes a single-piece inflatable and deflated elastic liner 14 (hereinafter simply referred to as the "inflatable liner"), a rigid cylindrical shell 12 surrounding the liner, and a base 18. It has become.

Liner 14 is typically formed from an elastomeric material.

The cow's teat is inserted into the bore 16 of the liner 14.

The base 18 connects to a vented milk receptacle (not shown).

As shown in FIG. 2, the elastic liner 14
2, so that only the elastic liner contacts the cow's teat.

A collar 22 extends around the upper end of the liner 14 and is hermetically crimped to the upper end of the shell 12.

In conventional teat cups with inflatable liners, a single hermetic seal is also provided between the liner and the bottom of the shell to form a single annular hermetic chamber.

In contrast, in the teat cup assembly of the present invention, two
Two annular expansion and contraction chambers 24 and 30 are formed.

The upper expansion/contraction chamber 24 is formed by setting an airtight seek at a portion where the shell 12 is in pressure contact with a rib 26 provided on the outer periphery of the liner 14.

This seal is ensured by providing the liner 14 with a thickened portion 27 that does not deform under pressure on its outer surface or under vacuum action on its inner surface.

Rib 26 must have sufficient resiliency to cooperate with shell 12 to form an annular seal.

The shell 12 is not completely cylindrical, but is slightly tapered.

As with conventional teat cups, the nipples 28 on the shell 12 are alternately connected to a vacuum source and an air source to alternately inflate and deflate the upper inflation chamber 24.

That is, when air is forced into the chamber 24, the elastic liner 14
is compressed inward and chamber 24 expands δ.

Conversely, when a vacuum is applied to chamber 24, liner 1
4 expands while chamber 24 contracts.

This alternating expansion and contraction movement of the liner 14 alternately squeezes and dissolves the cow's teats received within the inner bore 16 of the liner, thereby milking the cow's teats.

The second lower annular chamber 30 includes a seal around the rib 26;
A seal is formed by pressing the lower end of the shell 12 into a U-shaped groove 32 formed in the thick wall of the liner 14.

An air population 34 is provided in a portion of the shell body 12 surrounding the lower chamber 30.
A liner wall 14 is formed to surround the inside of the lower chamber 30.
An air volume 36 larger than the inlet 34 is bored in the opening.

There may be several air inlets in each of the shell 12 and liner 14, but only one in each.

Also, the air inlet 34 of the rigid shell 12 and the air inlet 36 of the liner 14 need not be aligned with each other.

During operation, atmospheric air is introduced into the bore 16 immediately below the upper flexible portion of the thickened portion 27 of the liner 14.

The amount of air flowing into the bore 16 is controlled by the size of the air population 34 of the rigid shell 12.

The air volume 36 of the liner 14 is large enough so that even if the liner 14 were to twist and the opening of the inlet 36 was to be reduced, the inflow of air would not be impeded.

The air inlets 34 in the rigid shell 12 can be precisely sized by drilling holes.

This population 34 controls the flow of air into the bore 16 of the liner 14, thus avoiding the difficult task of accurately forming air inlets in the liner 140 elastomeric material.

A cage 38 is fixed to the outer periphery of the portion of the shell 12 surrounding the lower annular chamber 30, and the cage holds the dustproof furnace material 40 mounted around the air inlet 340.

Furnace material 40 also prevents inlet 34 from clogging.

FIG. 3+1 shows a modified embodiment in which a p-material 401 is disposed within the lower chamber 30.

This configuration also prevents dust from entering the inner hole 16.

[Brief explanation of drawings]

FIG. 1 is a side view of the teat cup assembly of the present invention, FIG. 2 is a longitudinal sectional view of the teat cup assembly of FIG. 1, and FIG. 3 is a longitudinal sectional view of a modified embodiment of the teat cup assembly. . 12: Rigid shell, 14 Niliner, 16: Inner hole, 22:
Collar, 24, 30: Expansion chamber, 26: Lip, 2γ: Thick part, 28: Nipple, 34: Air inlet, 36: Air inlet, 38: Basket, 40: Furnace material.

Claims (1)

[Scope of Claims] 1. A double-acting teat cup assembly for a milking machine, comprising: a cylindrical liner 14 made of elastic material for receiving a cow's teat in its upper end; a rigid cylindrical shell 12 and an inner circumferential surface of the shell relative to an outer circumferential surface of the liner so as to define separate annular upper chamber 24 and an annular lower chamber 30 between the liner and the shell; A first annular airtight seal, a second annular airtight seal, and a third annular airtight seal are brought into sealing engagement at an upper end, a lower end, and an intermediate portion between the upper end and the lower end, and the upper chamber 24 is alternately inflated and a nipple 28 mounted through the wall of the shell for connecting an air source that alternately applies air pressure and vacuum to the upper chamber so as to cause it to contract; and a nipple 28 mounted through the wall of the shell for introducing atmospheric air into the lower chamber 30. a papilla consisting of at least one air port 34 leading through the wall of the shell into the lower chamber and at least one air inlet 36 leading from the lower chamber through the wall of the liner into the interior of the liner; Cup woven body. 2. Adjusting the liner air inlet 340 dimensions such that the flow rate of air from the liner air inlet 34 through the lower chamber into the interior of the liner is controlled by the shell air inlet 340 dimensions. A teat cup assembly according to claim 1, wherein the size of the inlet is larger than that of the inlet. 3. The teat cup assembly according to claim 1, comprising an air filtering material 40 attached around the air inlet 340 of the shell body, and a fixing member for fixing the filtering material around the air inlet 340. Three-dimensional. 4. The teat cup assembly according to claim 3, wherein the fixing member comprises a cage 38. 5. The teat cup assembly according to claim 1, wherein an air filtering material 40' is installed in the lower chamber. 6 The third airtight seal separating the upper chamber and the lower chamber is formed by a thick portion 27 of the liner and an elastic rib 26 provided on the thick portion and tightly pressed against the shell. A teat cup assembly as claimed in claim 1 comprising: 7. A member of a flexible liner for use in combination with a rigid shell having air inlet holes of a double-acting teat cup assembly, the flexible liner being adapted to receive a cow's teat within its upper end. A liner 14 is provided at the upper end of the liner with sealing means forming a first annular seal between the liner and the shell, and at the lower end of the liner a first annular seal is provided between the liner and the shell. a sealing means forming a two-ring seal;
the liner is provided with sealing means 26.27 for forming a third annular seal between the first annular seal and the second annular seal to define two adjacent annular chambers 24.30; Air is introduced into one of the two annular chambers 30 near the bottom of the shell through the air inlet hole 34, and the liner is arranged between the first annular seal and the second annular seal. A liner member comprising at least one air inlet 36 extending through the liner. 8. The sealing means forming the third annular seal:
A thick portion 27 formed on the liner, and an elastic rib 26 provided on the thick portion and tightly pressed against the shell.
A liner member according to claim 1, comprising: