Milking device provided with cleansing means

Abstract

Device for pneumatically milking a cow, comprising a number of milk extractors, each comprising a teat cup as well as milk line connected to the lower end of the teat cup, which line leads from the teat cup to a collection chamber for the milk from the teat cup, each milk extractor being provided with a supply for a cleansing medium, such as a disinfectant, to the teat cup, in particular to a teat present in the teat cup, the supply comprising a line having an end portion with discharge end, and each milk extractor being provided with means for closing off the passage of the milk extraction at or downstream of the discharge end of the line for cleansing medium, preferably at that level, when discharging the cleansing medium, the closing means comprising a reciprocating closing body that can be moved between a position leaving the passage of the milk extractor free and a position closing it off, the closing body being provided with a squirt line forming the end portion with discharge end of the line for supply of cleansing medium, and being positioned to debouch into the milk extractor, particularly the milk line, when in the closing-off position

1 . (canceled)  
   
   
       2 . Device for milking a cow, comprising a number of milk extractors, each defining a milk passage and comprising a teat cup as well as a milk line connected to the lower end of the teat cup, which line leads from the teat cup to a collection chamber for the milk from the teat cups, each milk extractor being provided with a closing body for the milk passage and a chamber, debouching in the milk extractor, for said closing body, which closing body is movable between a free position retracted in the chamber and outside the milk passage for leaving the milk passage of the milk extractor free and a closing position closing off the milk extractor, each milk extractor furthermore being provided with a supply for a cleansing medium, such as a disinfectant, to the teat cup, the supply having a discharge end opening, which is a pair of said closing body for the milk passage, the discharge end opening being positioned to debouch into the milk extractor, in particular the milk line, when the closing body is in the closing position, wherein the closing body is provided with a recess, duct or the like for fluid connection of a space in the milk extractor located at the side of the closing body facing the teat cup and the chamber.  
   
   
       3 . Device according to  claim 2 , wherein the chamber is positioned transverse to the milk extractor.  
   
   
       4 . Device according to  claim 2 , wherein the closing body is bearing mounted in a sliding manner in the chamber.  
   
   
       5 . Device according to  claim 2 , wherein the closing body is movable in a direction transverse to the milk line.  
   
   
       6 . Device according to  claim 2 , wherein the recess is a levelling in the surface of the closing body.  
   
   
       7 . Device according to  claim 2 , wherein the chamber is provided with drainage holes.  
   
   
       8 . Device according to  claim 2 , the chamber near the connection to the milk extractor being provided with a sealing for sealing engagement of the circumference of the closing body.  
   
   
       9 . Device according to  claim 8 , the closing body having a narrowed portion, situated at radial distance from the inner surface of the chamber, the sealing engaging about the narrowed closing body portion.  
   
   
       10 . Device according to  claim 8 , the sealing being a ring having a sealing lip oriented to the chamber inner side.  
   
   
       11 . Device according to  claim 2 , furthermore being provided with means for passage of water, particularly in the form of a pulsating water/air mixture, through a supply line to the discharge end opening.  
   
   
       12 . Device according to  claim 2 , the discharge end opening in the closing body being substantially radially oriented, preferably in a direction substantially parallel to the passage of the milk extractor and towards the teat cup.  
   
   
       13 . Device according to  claim 8 , the discharge opening in the closing body being substantially radially oriented, preferably in a direction substantially parallel to the passage of the milk extractor and towards the teat cup, the closing body in the retracted, free position opening with the discharge end opening at the inner side of the sealing, and the sealing being active around a closing body end situated outside of it.  
   
   
       14 . Device according to  claim 2 , the discharge end opening being positioned to be closed off from the milk line when in the free position.  
   
   
       15 . Device according to  claim 2 , the closing body and the chamber being accommodated in a coupling piece which is accommodated in the milk extractor.  
   
   
       16 . Device according to  claim 2 , the closing body being moveable between the free position and the closing-off position by a reciprocating movement.  
   
   
       17 . Assembly of a number of devices according to  claim 2 , and a central milk storage connected to the milk collection chamber.  
   
   
       18 . Method for milking a cow, the milk discharge being closed off after milking by moving a closing body from a position keeping the milk discharge open to a closing position keeping the milk discharge closed off, cleansing medium being discharged via the closing body, by squirting cleansing medium in the milk discharge towards the teat cup, wherein, when the teat cups are still attached to the cow, in the closing position of the closing body, cleansing agent falling back on the closing body being deflected from the side of the closing body facing the teat cup to a chamber.  
   
   
       19 . Method according to  claim 18 , wherein cleansing agent falling back on the closing body is deflected from the side of the closing body facing the teat cup to a chamber in which the closing body can be accommodated in the open position.  
   
   
       20 . Method according to  claim 18 , the closing body subsequently being moved to the open position, the chamber being sealed with respect to the milk discharge, and subsequently a water/air mixture again being discharged via the closing body for rinsing the chamber, the rinsing liquid escaping via drainage holes.  
   
   
       21 . Method according to  claim 18 , the teat cups being released, and while keeping the closing body in the closed off position, squirting a pulsating water/air mixture via the closing body for rinsing the milk extractor.  
   
   
       22 . Device for milking a cow, comprising a number of milk extractors, each defining a milk passage and comprising a teat cup as well as a milk line connected to the lower end of the teat cup, which line leads from the teat cup to a collection chamber for the milk from the teat cups, each milk extractor being provided with a closing body for the milk passage and a chamber, debauching in the milk extractor, for said closing body, which closing body is movable between a free position retracted in the chamber and outside the milk passage for leaving the milk passage of the milk extractor free and a closing position closing off the milk extractor, each milk extractor furthermore being provided with a supply for a cleansing medium, such as a disinfectant, to the teat cup, the supply having a discharge end opening, which is a part of said closing body for the milk passage, the discharge end opening being positioned to debouch into the milk extractor, in particular the milk line, when the closing body is in the closing position, the device furthermore being provided with means for passage of water, particularly in the form of a pulsating water/air mixture, through a supply line to the discharge end opening, the discharge end opening being positioned to be closed off from the milk line when in the free position wherein the chamber is provided with drainage holes.