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US 6,935,539 B2Granted
Device for the metered delivery of a viscous liquid
AssigneeESEC Trading SA
InventorsMatthias Krieger, Christof Koster
Life of this patent
Estimating the term…
Abstract
A device for the metered delivery of a viscous liquid has a pump body with a drill hole accommodating two pistons which connects a first chamber serving as an intake chamber and a second chamber serving as a discharge chamber. Two swivel arms driven by two cam discs are foreseen as the drive mechanism for the back and forth movement of the two pistons. For the metered delivery of an adhesive which contains flakes of silver the drill hole is designed such that it serves for guiding the pistons as well as for sealing the pump path.
Claims20
A device for the metered delivery of a viscous liquid, comprising:
- a first and second piston consisting of a selected one of hard metal or tool steel,
- a pump body comprising a first sleeve consisting of a selected one of hard metal or ceramic and having a first drill hole accommodating the pistons as well as two further drill holes which run orthogonally to the first drill hole and one end of which opens out into the first drill hole and the other end of which opens out into an intake chamber or a discharge chamber in the pump body, wherein the first drill hole and the first and second piston each form a slot seal and wherein the pistons each stick out at a respective end of the first drill hole, and
- a drive mechanism for moving the pistons back and forth such that a width of a slit formed between the pistons varies during the back and forth movement.
Dependencies are inferred from the claim text.