Vent plug for milking liner

Animal husbandry – Milkers – Teat compressor or cup

Reexamination Certificate

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Reexamination Certificate

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11121478

ABSTRACT:
A vent plug for a milking liner has a shielded inlet that reduces the likelihood that it will become clogged with debris from the floor of the milking parlor. In one embodiment, the vent plug has a plurality of redundant inlets that allow the vent plug to function if one of the inlets becomes clogged. In another embodiment, the inner flange of the body of the vent plug is at least twice the thickness of the body tube to help secure the vent plug in the milking liner.

REFERENCES:
patent: 488282 (1892-12-01), Mehring
patent: 3255732 (1966-06-01), Raht
patent: 3476085 (1969-11-01), Noorlander
patent: 3482547 (1969-12-01), Maier
patent: 3659558 (1972-05-01), Noorlander
patent: 3931795 (1976-01-01), Duncan
patent: 3967586 (1976-07-01), Noorlander
patent: 3967587 (1976-07-01), Noorlander
patent: 4263875 (1981-04-01), Maier
patent: 4303038 (1981-12-01), Thompson
patent: 4441454 (1984-04-01), Happel
patent: 4604969 (1986-08-01), Larson
patent: 5161482 (1992-11-01), Griffin
patent: 6055931 (2000-05-01), Sanford
patent: 6308655 (2001-10-01), Oosterling
patent: 6631694 (2003-10-01), Chowdhury
patent: 6745718 (2004-06-01), Chowdhury
patent: 6755153 (2004-06-01), Chowdhury
patent: 6776120 (2004-08-01), Chowdhury
patent: 6796272 (2004-09-01), Chowdhury
patent: 1334656 (2003-08-01), None
patent: 1525716 (1968-05-01), None

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