Patent ID: 6705845
Filing Date: 2004-03-16
Classification: F04B

Abstract:
A Device for the metered delivery of a viscous liquid, comprising:a first and second piston, a pump body with a first drill hole connecting a first chamber serving as an intake chamber and a second chamber serving as a discharge chamber, the first drill hole accommodating the two pistons, wherein a slit is formed between opposite end faces of the pistons, and a drive mechanism for moving the pistons back and forth, wherein a width of the slit varies during the back and forth movement, the drive mechanism comprising: a first swivel arm an end of which is rotatable on a first axis and an opposite end of which the first piston is detachably secured to, a second swivel arm an end of which is rotatable on a second axis running parallel to the first axis and an opposite end of which the second piston is detachably secured to, a first and second cam disc, a motor for rotating the first and second cam discs, a first ball bearing arranged between the first swivel arm and the first cam disc and being in permanent contact with the first swivel arm and with the first cam disk, and a second ball bearing arranged between the second swivel arm and the second cam disc and being in permanent contact with the second swivel arm and with the second cam disk, whereby a rotating movement of the cam discs is transformed into a back and forth movement of the pistons.