Delaval Holding Ab

Mats Stellnert

Stuart Wipperfurth

Martin Sjölund

Bjorn Carlson

Mikael Gisslegard

Raymond Terwilleger

Daniel Heim

Richard T Meyer

The present invention relates to a vacuum source for providing vacuum to at least a first vacuum drain through conduits, comprising at least a first and a second vacuum pump. The vacuum source comprises a control system adapted to detect the consumed airflow, and to control the operation of each of the first and second vacuum pump based on the detected airflow.

Controllable vacuum source

An arrangement and a method for indicating an undesired detachment of a milking member from an animal in a milking stall. The arrangement includes a removing device adapted to detach the milking member from the animal and move the detached milking member to a parking position when the milking process has been completed, and a supervision device adapted to supervise when the milking member has been detached from the animal before the milking process has been completed. When the milking member has been detached from the animal before the milking process has been completed, the removing device is adapted to move the undesirably detached milking member to an indicating position located at a distance from the parking position.

Arrangement and method for indicating undesired detachment of a milking member from an animal

A fluid application system for automatically applying a fluid to the teats of an animal subsequent to the milking of the animal comprises a fluid delivery arrangement comprising a plurality of applicators, wherein each of the applicators is arranged in connection with a respective teat cup and is provided for applying the fluid to a teat of the animal, to which the respective teat cup is attached during the milking of the animal, in connection with a detachment of the teat cup from the teat. A control arrangement is provided for (i) determining, for a detachment of a teat cup from a teat, whether that detachment is a normal detachment or an abnormal detachment, and (ii) controlling, for the detachment of the teat cup from the teat, the applicator arranged in connection with that teat cup to apply the fluid provided that the detachment is a normal detachment and to not apply the fluid provided that the detachment is an abnormal detachment.

Fluid application systems and methods and milking systems and methods

An automatic milking system having a vacuum pump arrangement, the automatic milking system includes a milking system controller arranged to control milking system parameters and a vacuum pump arrangement having a vacuum system controller for controlling vacuum system parameters. Communication means is coupled to the vacuum system controller and to the milking system controller for establishing communication between the vacuum system controllers and the milking system controller. The milking system controller has signal transmitting means for transmitting a message to the vacuum system controller. The vacuum system controller has signal receiving means for receiving the message from the milking system controller, and the vacuum system controller is arranged to change a least one of the vacuum system parameters depending on the received message.

Vacuum system communication

A vacuum pump of the rotary vane type, comprises a casing ( ) having a cylindrical inner wall surface ( ), a first ( &prime;) and a second ( &prime;) end wall at opposite sides of said casing defining a fluid cavity therein, fluid inlet ( ) and outlet ( ) ports in open communication with said fluid cavity, and a rotor ( &prime;) extending between said end walls carried by a drive shaft ( ) for rotation about an axis eccentric to said casing inner wall surface, said rotor being provided with a plurality of longitudinally extending radial slots ( ) about the periphery thereof. Further, there are provided a plurality of vanes ( ), each being radially slidably carried within a respective of said slots. The invention comprises that at least one of said end walls and said rotor comprise, at oppositely facing surfaces, an annular recess ( &Prime;) and an annular rib ( &Prime;), respectively, said rib and recess being interengaging so as to define a radial clearance ( &prime;) and an axial seal ( &prime;), respectively, between said at least one of said end walls and said rotor, and that the rotor/drive shaft combination is axially biased.

Growing community of inventors

Farsta, Sweden

Mats Stellnert