Self-loading peristaltic pump for extracorporeal blood circuit
AssigneeCHF Solutions, Inc.
InventorsJohn O'Mahony, Sonny Behan
Life of this patent
Estimating the term…
Abstract
A peristaltic pump is disclosed having pump motor with a rotating motor shaft and a shaft axis; a peristaltic pump head rotatably mounted on the motor shaft; a raceway having a semi-circular track arranged around the pump head and coaxial with the shaft axis, wherein the track has a beveled edge at an entrance to the raceway to receive a tube loop being loaded into the pump; the pump head includes at least one roller orbiting the raceway and compressing the tube loop against said raceway, and a cartridge to which the tube loop is attached and mountable on the raceway.
Claims10
A cartridge for a blood pump having a raceway track and a pump head both concentric to a motor shaft and a boss on the raceway and adjacent the track, the cartridge comprising:
- a housing having a cavity to fit over the boss and a latch to grasp the raceway when the housing is fitted over the boss, and
- a tube loop having a pair of tube legs attached to the housing and a loop portion extending upward from said housing at an angle from a plane of the housing tilted towards said raceway.
A peristaltic pump comprising:
- a pump knob attached to a knob shaft having a distal treaded section and a proximal beveled outer face;
- a motor shaft with splines and an inner bevel concentric with the shaft to allow the expansion of the shaft splines when engaged by the beveled outer face of the knob shaft;
- a pump head comprising a pair of lever mounted rollers and a bore aperture to receive said motor shaft and having a locking mechanism to secure the head to the motor shaft such that the head rotates with the shaft, wherein said levers are pivotably attached to opposite sides of the head and said rollers orbit the knob shaft.
Dependencies are inferred from the claim text.