Reciprocating pump
AssigneeBecton, Dickinson and Company
InventorJ. Richard Gyory
Life of this patent
Estimating the term…
Abstract
A pump suitable for use in a wearable medical device, such as a patch pump, comprises an axially translatable chamber with an inlet and an outlet, a piston or a diaphragm rotatably received in the chamber, a first valve between the inlet and the chamber, a second valve between the outlet and the chamber, a cam affixed to the chamber, a follower affixed to the piston and in contact with the cam for axially translating the chamber, and a biasing means acting on the chamber for applying a force on the chamber in an axial direction of the chamber to maintain such contact.
Claims9
A pump system for the pumping of a liquid, the pump system comprising:
- an axially translatable chamber having a cam surface, an inlet valve and an outlet valve;
- a diaphragm received in the chamber;
- a follower coupled to the diaphragm and in contact with the cam surface for axially translating the chamber by rotation of said follower relative to said chamber;
- and
- where said chamber is biased in an axial direction of the chamber with respect to the pump system to maintain contact between the follower and the cam surface of the chamber;
- wherein said diaphragm is flexible and has an outer edge rotatably coupled to an inner surface of said chamber, and said pump system further comprises a post, said diaphragm covering an axial end of said post.
Dependencies are inferred from the claim text.