| 摘要 |
<p>The milking inflation is formed from an elastomeric material and includes a suction sleeve which is located inside the shell of a teat cup assembly and a milking tube portion which is located below the lower end of the shell. An air vent is formed as an integral part of the milking tube portion at a location near the lower end of the shell. The air vent includes an annular recess in the wall of the milking tube portion which defines an isolated area and includes a bottom having an annular web section of reduced thickness surrounding the isolated area and also an opening extending through the isolated area for admitting a metered amount of air into the milking tube portion. The thinner, more flexible web section absorbs distortions caused by flexing of the milking tube portion during the milking operation, so that the air vent opening substantially retains its original shape and size during use.</p> |
