Pumping apparatus for perfusion and other fluid catheterization procedures
First Claim
1. A pumping apparatus for delivering a continuous flow of body fluid to a preselected location within a patient'"'"'s body, comprising:
- first and second pumps, each of the two pumps having a barrel portion defining a pump chamber and a plunger member slidably received within said barrel portion, each of said pump barrel portions having an outlet end for the passage of fluids from the pump chamber out of said pump,a support assembly supporting said first and second pumps together, said first and second pumps being supported such that each of said pump outlet ends is oriented in the same direction, the pumping apparatus further including an actuating member slidably disposed with respect to said support assembly and adapted for reciprocating movement along an axis parallel to respective longitudinal axes of said first and second pumps, said actuating member engaging said second pump plunger member and said first pump barrel portion, whereby movement of said actuating member in a first operating direction causes said actuating member to simultaneously engage said first pump in a suction stroke and said second pump in a pumping stroke and, and whereby movement of said actuating member in a second operating direction, opposite to said first direction, causes said actuating member to simultaneously engage said first pump in a pumping stroke and said second pump in a suction stroke.
1 Assignment
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Accused Products
Abstract
A pumping apparatus which is particularly useful in catheterization procedures has two pumps supported in a parallel arrangement. The pumps are engaged by an actuating rod connected to a power cylinder which reciprocates longitudinally between the two pumps. The two pumps are held within the housing such that only the plunger element of one pump is capable of movement in response to the actuating member while only the barrel element of the other pump is capable of movement in response to the actuating member. By way of this linkage, during movement of the actuating rod, one pump performs a pumping stroke while the other pump performs a suction stroke.
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Citations
23 Claims
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1. A pumping apparatus for delivering a continuous flow of body fluid to a preselected location within a patient'"'"'s body, comprising:
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first and second pumps, each of the two pumps having a barrel portion defining a pump chamber and a plunger member slidably received within said barrel portion, each of said pump barrel portions having an outlet end for the passage of fluids from the pump chamber out of said pump, a support assembly supporting said first and second pumps together, said first and second pumps being supported such that each of said pump outlet ends is oriented in the same direction, the pumping apparatus further including an actuating member slidably disposed with respect to said support assembly and adapted for reciprocating movement along an axis parallel to respective longitudinal axes of said first and second pumps, said actuating member engaging said second pump plunger member and said first pump barrel portion, whereby movement of said actuating member in a first operating direction causes said actuating member to simultaneously engage said first pump in a suction stroke and said second pump in a pumping stroke and, and whereby movement of said actuating member in a second operating direction, opposite to said first direction, causes said actuating member to simultaneously engage said first pump in a pumping stroke and said second pump in a suction stroke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A pumping apparatus for pumping blood comprising:
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a housing, first and second pumps disposed within the housing, each of the two pumps having an elongated barrel defining a pump chamber therein and further having a plunger slidable received within said pump chamber; an actuating assembly for simultaneously actuating each of said first and second pumps, the actuating assembly operatively engaging said first and second pumps, the actuating assembly including a fluid cylinder for driving said actuating assembly between two operative positions, said actuating assembly engaging said first pump barrel portion and said second pump plunger member, whereby movement of said actuating assembly in a first direction in response to said fluid cylinder effects a pumping stroke in said first pump and an intake stroke in said second pump, and whereby movement of said actuating assembly in a second direction in response to said fluid cylinder effects an intake stroke in said first pump and a pumping stroke in said second pump; and
,said housing includes two parallel channels extending longitudinally therein between two end portions of said housing, said two channels including means for restraining a part of each of said two pumps. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A pumping apparatus for pumping blood comprising:
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first and second syringe pumps, each of the two 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 member supporting said first and second pumps, said base fixedly engaging said first syringe pump plunger member and said second syringe pump barrel portion, whereby said first and second syringe pumps are actuated by movement of said first syringe pump barrel portion relative to said first syringe pump plunger member and second syringe pump plunger member relative to said second syringe pump barrel portion; an actuating assembly for simultaneously actuating each of said first and second pumps in alternating pumping and suction strokes, the actuating assembly operatively engaging said first syringe pump barrel portion and said second syringe pump plunger member, said actuating assembly including a fluid-powered cylinder for driving said actuating assembly in a reciprocating path between two operative positions, whereby movement of said actuating assembly in a first direction causes said actuating assembly 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 actuating assembly in a second direction causes said actuating assembly to drive said first pump in a pumping stroke and to engage said second syringe pump in a suction stroke.
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Specification