Liquid dispensing module
AssigneeNordson Corporation
InventorsChristopher R. Chastine, Brett A. Pearson, John M. Riney
Life of this patent
Estimating the term…
Abstract
A liquid dispensing module includes a dispenser body assembly, a flexible seal, a needle, and an actuator. The dispenser body assembly includes a liquid inlet, a discharge outlet, and a flow channel including a valve seat between the inlet and outlet. The flexible seal engages the dispenser body assembly and includes a downstream end. The needle includes an enlarged portion engaging and retaining the downstream end of the flexible seal to place the flexible seal in lengthwise compression between the enlarged portion and the dispenser body assembly. The needle also includes a valve element that moves between open and closed positions. The flexible seal prevents liquid from leaking out of the flow channel.
Claims27
A liquid dispensing module for dispensing a viscous liquid comprising:
- a dispenser body assembly including a liquid inlet, a discharge outlet, and a flow channel capable of directing a flow of the liquid from said liquid inlet to said discharge outlet, said flow channel including a valve seat between said liquid inlet and said discharge outlet;
- an actuator;
- a flexible seal including an upstream end sealingly engaging said dispenser body assembly and including a downstream end, said flexible seal adapted to seal said flow channel from said actuator;
- and
- a needle including a valve element and operable by said actuator for reciprocating movement in said dispenser body assembly between an open position in which said valve element is disengaged with said valve seat allowing liquid flow from said discharge outlet and a closed position in which said valve element is engaged with said valve seat preventing liquid flow from said discharge outlet, said needle including an enlarged portion engaging and retaining said downstream end of said flexible seal to allow reciprocating movement of said downstream end with said needle and to place said flexible seal in lengthwise compression between said upstream and downstream ends.
A liquid dispensing module for dispensing a viscous liquid comprising:
- a dispenser body assembly including a liquid inlet, a discharge outlet, and a flow channel capable of directing a flow of the liquid from said liquid inlet to said discharge outlet, said flow channel including a valve seat between said liquid inlet and said discharge outlet, said dispenser body assembly further including a recess with a transverse surface;
- an actuator;
- a needle including a valve element, said needle operable by said actuator for reciprocating movement in said dispenser body assembly between an open position in which said valve element is disengaged with said valve seat allowing liquid flow from said discharge outlet and a closed position in which said valve element is engaged with said valve seat preventing liquid flow from said discharge outlet;
- and
- a flexible seal including a downstream end sealingly engaging said needle and an upstream end engaged and retained by said transverse surface to place said flexible seal in lengthwise compression between said upstream and downstream ends, said flexible seal adapted to seal said flow channel from said actuator.
An assembly for use in a liquid dispensing module for dispensing a viscous liquid, the assembly comprising:
- a flexible seal including an upstream end configured to sealingly engage a dispenser body assembly and including a downstream end;
- and
- a needle including a valve element adapted for reciprocating movement in the dispenser body assembly, said needle further including an enlarged portion engaging and retaining said downstream end of said flexible seal and adapted to place said flexible seal in lengthwise compression between said enlarged portion and the dispenser body assembly, and said downstream end adapted to reciprocate with said needle.
An assembly for use in a liquid dispensing module for dispensing a viscous liquid, the assembly comprising:
- a dispenser body assembly component with a recess defining a transverse surface;
- a needle adapted for reciprocating movement in the dispenser body assembly and including a valve element, said valve element movable between an open position and a closed position;
- and
- a flexible seal including a downstream end sealingly engaging said needle and including an upstream end engaged and retained by said transverse surface to place said flexible seal in lengthwise compression between said upstream and downstream ends.
Dependencies are inferred from the claim text.