Back to results
US 9,352,319 B2Granted
Liquid dispensing device
AssigneeTTP Labtech Limited
InventorsAnthony Douglas, Gary Cochrane
Life of this patent
Estimating the term…
Abstract
A droplet dispensing apparatus has a piston rod driven by a solenoid, the rod for connection to a piston of a droplet dispensing syringe, in which the output member from the solenoid is directly connected to the rod through the entire impulse produced by the solenoid.
Claims17
A droplet dispensing apparatus for actuating a syringe to dispense droplets, comprising:
- a syringe receiving formation,
- a piston rod for connection to a piston of a droplet dispensing syringe, the piston rod being arranged to extend from the apparatus into the droplet dispensing syringe to connect to the piston,
- a driver comprising a solenoid and an output member, the output member being fixedly attached to the solenoid and arranged to be accelerated by the solenoid towards a droplet dispensing orifice of the syringe,
- a striker attached to the piston rod, and
- an anvil arranged to arrest movement of the piston rod by impact of the striker on the anvil, and
- wherein the output member is configured to be in contact with the piston rod such that the output member and piston rod simultaneously accelerate from a stationary condition.
3 more elements
A droplet dispensing apparatus, comprising:
- a piston rod;
- a syringe receiving portion;
- a driver, comprising a solenoid and an output member adapted for contact with the piston rod, the output member being fixedly attached to the solenoid and arranged to be accelerated by the solenoid toward an output direction of the syringe receiving portion;
- an anvil;
- and
- a striker;
- the striker being attached to the piston rod and the anvil being arranged to limit travel of the striker in a first direction, the anvil being movable in a second direction, opposite to the first direction, to retract the piston rod in a direction away from the syringe receiving portion;
- the apparatus being configured to:
- move the anvil in the second direction, opposite the first direction, to retract a piston, by a first distance, when an orifice of a syringe connected to the apparatus is not submerged in a liquid to be dispensed;
- and
- to move the anvil in the first direction, to define a stroke distance of the striker, which is greater than the first distance, such that after accelerating the striker towards the anvil, movement of the striker is arrested by impact with the anvil to dispense a drop of liquid via the orifice.
8 more elements
A droplet dispensing apparatus for actuating a syringe to dispense droplets, comprising:
- a piston rod adapted for connection with a piston, and
- a driver comprising a solenoid and an output member, the output member arranged to be accelerated by the solenoid,
- a striker attached to the piston rod,
- an anvil arranged to arrest movement of the piston rod by impact of the striker on the anvil;
- and
- wherein the output member is configured to be in contact with the piston rod such that the output member and piston rod simultaneously accelerate from a stationary condition.
3 more elements
Dependencies are inferred from the claim text.