| 摘要 |
<p>An inflation for use in a teat cup assembly for automatic milking machines employing a vacuum milk line and a pulsating vacuum line is disclosed. The inflation comprises an elongate, tubular, body member having a novel mouth-forming diaphragm at one end thereof for engaging the teat of a cow to retain the teat cup assembly from falling off the teat at the end point of milking. The mouth-forming diaphragm is formed by bonding one end of a relatively short tubular mouth-forming member to one end of the body member, wherein the mouth-forming member has a maximum cross-sectional dimension smaller than the maximum crosssectional dimension of the tubular body member. The end of the body member to which the mouth-forming member is attached is expanded over the outer circumference of an annular expansion ring which has a diameter substantially greater than the cross-sectional dimension of the unexpanded portion of the tubular body member, so that the end of the body member is held in an enlarged circular configuration and the end of the mouth-forming member which is bonded to the body member is expanded outwardly toward the perimeter of the expansion ring. The other end of the mouth-forming member extends inwardly toward the longitudinal axis of the body-forming member, thereby forming the mouth-forming diaphragm at the end of the body-forming member. The mouth-forming diaphragm has a central opening therein which has a diameter less than the maximum cross-sectional dimension of the unexpanded portion of the body-forming member. Preferably, the body member and the mouth-forming member are made of silicone rubber material, with the mouth-forming member having a circular crosssectional shape.</p> |
