Hand-powered pumping apparatus for perfusion and other fluid catheterization procedures

A pumping apparatus for pumping blood comprising:

• a housing, including two channels,
• first and second pumps disposed on the housing, each of the two pumps having an elongated barrel defining a pump chamber therein and further having a plunger slidably received within said pump chamber, each of the two channels respectively accommodating said plungers and barrels of said first and second pumps, said first and second channels further restraining said first and second pump barrels from movement with respect to said first and second pump plungers;
• an actuating assembly for simultaneously actuating each of said first and second plungers of said first and second pumps in opposite directions;
• and,
• a driving assembly for driving said actuating assembly, the actuating assembly including first and second rack members operatively engaging said first and second pumps, said actuating assembly further including a pinion gear for driving said rack members in said opposite directions between two operative positions, said pinion gear operatively engaging said first and second rack members, whereby movement of said pinion gear in a first direction in response to movement of said drive assembly effects a pumping stroke in said first pump and an intake stroke in said second pump, and whereby movement of said pinion gear in a second direction in response movement of said drive assembly effects an intake stroke in said first pump and a pumping stroke in said second pump, said drive assembly further including a handle driving a drive gear which engages the handle and which also engages one of said rack members, said drive gear including a connection member extending therefrom and engaging a yoke member extending from said one rack member, whereby rotation of said drive gear causes said pin member to move the yoke member to reciprocate along a linear path, said connection member thereby converting rotation of said handle into linear movement of said yoke member which is transferred to said one rack member, said pinion gear causing said other rack member to move in a direction opposite that of said one rack member.

A pumping apparatus for pumping blood comprising:

• first and second syringe pumps, each of the syringe pumps having a barrel portion defining a pump chamber therein and said pumps further having a plunger member slidably received within said pump chamber;
• a base supporting said first and second syringe pumps, said base fixedly engaging said first and second syringe pump barrel portions with respect to said first and second pump plunger members by way of first and second channels by which said first and second syringe pumps are engaged by said base;
• an actuating assembly for simultaneously moving each of said first and second pumps in alternating pumping and suction strokes, the actuating assembly including a pinion gear and two elongated rack members operatively connected to said pump plunger members, the pinion gear being disposed on said base between the two rack members and reciprocatingly driving each of said rack members in opposite directions between two operative positions, said pinion gear being driven by movement of said first rack member and said pinion gear consequently driving said second rack member in a direction opposite said first rack member;
• a drive assembly for supplying drive to said actuating assembly, said drive assembly including a rotatable handle, the handle engaging a drive gear, the drive assembly further including a yoke transversely disposed with respect to said pinion gear and operatively connecting said drive gear with said first rack member, said yoke including a linear opening which receives a post member extending from said drive gear, whereby, the engagement between said drive gear post member and yoke opening converts rotational movement of said handle which is imparted to said drive gear into reciprocating linear movement of said first rack member, whereby movement of said handle through 180.degree. of rotation causes said pinion gear to drive said first syringe pump in a suction stroke and to simultaneously engage said second syringe pump in a pumping stroke, and whereby movement of said handle through an additional 180.degree. of rotation causes said pinion gear to drive said first pump in a pumping stroke and to engage said second syringe pump in a suction stroke.