Animal husbandry – Milkers – With automatic control
Patent
1976-03-25
1977-03-15
Chamblee, Hugh R.
Animal husbandry
Milkers
With automatic control
119 1444, A01J 504
Patent
active
040118380
ABSTRACT:
A milking machine system includes a flow rate sensing device, a timing device, and a system control means for varying the character of the working and massage vacuums during the milking process, in response to the rate of milk flow and to time. The milking machine system can be controlled in predetermined phases, such as a stimulation phase, a milking phase, a post-milking phase, and a switch-off phase, with the duration of the phases dependent on the rate of milk flow reaching certain predetermined levels and on time lapse parameters. The level of the working vacuum or massage vacuum can be varied in each phase with the massage vacuum pulses also variable as to pulse frequency and duration. The teat cups can also be operated independently of one another, and can be subjected periodically to sequential pulses of the massage vacuum to operate the teat cups sequentially. A system control device is included for controlling the vacuum and pulse parameters of each phase in response to the level of milk flow and lapses of time, and includes electronic logic circuitry and electronic drivers.
REFERENCES:
patent: 3754532 (1973-08-01), Troberg et al.
patent: 3783837 (1974-01-01), Olander
patent: 3878819 (1975-04-01), Harman
patent: 3900005 (1975-08-01), Goldsmith
Nordegren Sven-Ake
Norton Douglas J.
Alfa-Laval AB
Chamblee Hugh R.
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