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US 11,696,983 B2Granted
Rotational metering pump for insulin patch
AssigneeBecton, Dickinson and Company
InventorsAlessandro E. Pizzochero, J. Richard Gyory, Kenneth Focht, Justin Fisk, Joseph Gordon, Matthew J. Perry, Ajit D'Souza, Christopher Petroff
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Abstract
A rotary pump for a fluid metering system is provided. The rotary pump reciprocates, and is reversed by a signal from a limit switch that is deflected by an actuator arm on a rotating sleeve of the pump system. The rotary pump includes a plunger and optional stopper formed from a two-shot molding process, and including seals overmolded onto the head of the plunger and the head of the optional stopper.
Claims2
A method of manufacturing a rotational metering pump, comprising,
- molding a plunger from rigid material;
- overmolding a seal onto a head of the plunger, the seal comprising viscoelastic elastomer;
- inserting the plunger and seal into a pump chamber;
- and
- inserting a pin into a hole in the plunger through a helical slot in a sleeve comprising the pump chamber;
- the sleeve comprising a tab to prevent axial movement of the sleeve relative to a manifold.
3 more elements
Dependencies are inferred from the claim text.