US 11,723,341 B2
Safety valve for an automated milker unit backflushing and teat dip applicator system
Kevin L. Torgerson, Holmen, WI (US); Nathan Hedlund, Lewiston, MN (US); and Matthew J. Stuessel, Alma Center, WI (US)
Assigned to GEA Farm Technologies, Inc., Romeoville, IL (US)
Filed by GEA Farm Technologies, Inc., Romeoville, IL (US)
Filed on Dec. 20, 2021, as Appl. No. 17/556,591.
Application 15/943,410 is a division of application No. 15/295,612, filed on Oct. 17, 2016, granted, now 9,930,863.
Application 17/556,591 is a continuation of application No. 15/943,410, filed on Apr. 2, 2018, abandoned.
Application 15/295,612 is a continuation of application No. 14/588,099, filed on Dec. 31, 2014, granted, now 9,468,189, issued on Oct. 18, 2016.
Application 14/588,099 is a continuation of application No. 13/269,835, filed on Oct. 10, 2011, granted, now 9,072,273, issued on Jul. 7, 2015.
Application 13/269,835 is a continuation of application No. 12/584,475, filed on Sep. 4, 2009, granted, now 8,033,247, issued on Oct. 11, 2011.
Prior Publication US 2022/0142111 A1, May 12, 2022
Int. Cl. A01J 7/04 (2006.01); A01J 7/02 (2006.01); A01J 7/00 (2006.01); A01J 5/04 (2006.01)
CPC A01J 7/04 (2013.01) [A01J 5/047 (2013.01); A01J 7/00 (2013.01); A01J 7/02 (2013.01); A01J 7/022 (2013.01); A01J 7/025 (2013.01); Y10T 137/2546 (2015.04); Y10T 137/4245 (2015.04); Y10T 137/4252 (2015.04); Y10T 137/8593 (2015.04); Y10T 137/87684 (2015.04)] 4 Claims
OG exemplary drawing
 
1. An automated teat dip application system comprising:
a main control;
a water supply in communication with the main control;
a dip supply in communication with the main control;
a mixer in communication with the dip supply and the water supply; and
a safety valve in fluid communication with the mixer and a downstream portion of a milker unit, and a dip valve piston for movement between a milking position and a backflush position, and the safety valve comprises:
a first valve, a second valve, and a third valve comprising:
a common valve seat element including:
a cylindrical cup having a closed end and an open end; and the closed end defines a first valve seat and a second valve seat, and the cylindrical cup defines a vent; and
the dip valve piston is at least partially disposed in the cylindrical cup and includes a first valve head disposed to engage the first valve seat when the first valve is closed, a second valve head disposed to engage the second valve seat when the second valve is closed, and a third valve element disposed to engage the third valve seat when the third valve is closed to the vent.