Disclosed is a fluid isolating pump. The fluid isolating pump includes a rotating cage, one or more roller assemblies mounted on the rotating cage, a cam plate, and a non-rotating central shaft. The cage includes a front plate and a back plate connected by multiple connecting rods. Each roller assembly is rotatably attached to a corresponding connecting rod of the cage. Each roller assembly includes one or more arms rotatably attached to the connecting rod, a connecting bar coupled to the one or more arms, one or more levers rotatably attached to the connecting rod, one or more suspensions, and a roller. Each suspension is coupled to at least one arm and to at least one lever. The roller is coupled to the one or more levers. The cam plate includes multiple openings having a first end and a second end. The connecting rod of each roller assembly is configured to slide from the first end of the opening to the second end of a corresponding opening.

A pump system for pumping a coolant fluid for cooled radiofrequency ablation treatment includes a housing having a front, a back, a right side, a left side, a top surface, and a bottom surface, and a plurality of peristaltic pump assemblies. The top surface of the housing includes a central channel between at least two of the peristaltic pump assemblies configured to drain fluid away from the front of the housing. A cooled radiofrequency ablation system additionally includes a pump system and a generator having mating surfaces such that the pump system can sit stably on top of the generator.

Pump heads for peristaltic pump assemblies are provided. For example, a pump head for a peristaltic pump comprises an occlusion bed, a rotor guide, a rotor assembly positioned between the occlusion bed and the rotor guide, and a pathway for tubing. The pathway comprises an inlet portion, an outlet portion, and a connecting portion that connects the inlet and outlet portions. The inlet portion is defined between the occlusion bed and the rotor guide, the outlet portion is defined between the occlusion bed and the rotor guide, and the connecting portion is defined between the occlusion bed and the rotor assembly. Further, the occlusion bed is movable with respect to the rotor guide and the rotor assembly. In exemplary embodiments, the pump head urges fluid flow through the tubing to supply a cooling fluid to a medical probe assembly for delivering energy to a patient's body.

A peristaltic pump with an oscillating drive 14 and a diverter valve 5, having a cylindrical pump housing 2 and the ports 4 and 12 are arranged in a end wall. The ports 4 and 12 are alternately used as outlet and inlet, controlled by the diverter valve 5 and in dependence on the pivot direction of the pump head 7. The roller or the sliding shoe 8 constantly flattens the pump hose and in this way, forms an annular space that is distinguished into a suction and compression chamber. Due to the constant contact of the roller or the sliding shoe 8, a sudden space enlargement is prevented according to the invention.

A pumping finger subassembly for a peristaltic infusion pump has a housing, a pinch member, a block member, and at least one biasing spring. The housing includes a transverse slot, a first side wall, and an open second side through which the pinch member and biasing spring(s) are inserted into the transverse slot. The block member includes a foot portion and a side wall portion. The foot portion is insertable into the housing through the open second side such that the block member is constrained against movement relative to the housing and the side wall portion of the block member opposes the first side wall of the housing, whereby the pinch member is supported on both lateral sides to prevent tilting of the pinch member.

Disclosed is a fluid isolating pump. The fluid isolating pump includes a rotating cage, one or more roller assemblies mounted on the rotating cage, a cam plate, and a non-rotating central shaft. The cage includes a front plate and a back plate connected by multiple connecting rods. Each roller assembly is rotatably attached to a corresponding connecting rod of the cage. Each roller assembly includes one or more arms rotatably attached to the connecting rod, a connecting bar coupled to the one or more arms, one or more levers rotatably attached to the connecting rod, one or more suspensions, and a roller. Each suspension is coupled to at least one arm and to at least one lever. The roller is coupled to the one or more levers. The cam plate includes multiple openings having a first end and a second end. The connecting rod of each roller assembly is configured to slide from the first end of the opening to the second end of a corresponding opening.

A microfluidic device is provided for managing fluid flow in disposable infusion devices, thereby providing periodic or constant flow of fluid even at very low doses and/or flow rates. Pumps utilizing the microfluidic device, as well as methods for manufacture and performing a microfluidic process are also provided.

A platen assembly positionable opposite a pumping mechanism of an infusion pump has a first platen member rotatably coupled to the pump to pivot about a first hinge axis and a second platen member rotatably coupled to the first platen member to pivot about a second hinge axis different from the first hinge axis. When the platen assembly is in a pump operating position, respective platen surfaces of the platen members follow a single surface profile, for example an arcuate surface profile in the case of a curvilinear peristaltic pump. The platen assembly may have a damage-tolerant design including a plurality of alignment counter-features arranged to mate with corresponding alignment features on the pump, wherein the platen assembly may still close after the pump is dropped or damaged only if resulting deformation of the platen assembly is within an allowable tolerance for safe pumping.

Disclosed is a fluid isolating pump. The fluid isolating pump includes a rotating cage, one or more roller assemblies mounted on the rotating cage, a cam plate, and a non-rotating central shaft. The cage includes a front plate and a back plate connected by multiple connecting rods. Each roller assembly is rotatably attached to a corresponding connecting rod of the cage. Each roller assembly includes one or more arms rotatably attached to the connecting rod, a connecting bar coupled to the one or more arms, one or more levers rotatably attached to the connecting rod, one or more suspensions, and a roller. Each suspension is coupled to at least one arm and to at least one lever. The roller is coupled to the one or more levers. The cam plate includes multiple openings having a first end and a second end. The connecting rod of each roller assembly is configured to slide from the first end of the opening to the second end of a corresponding opening.

A pumping finger subassembly for a peristaltic infusion pump has a housing, a pinch member, a block member, and at least one biasing spring. The housing includes a transverse slot, a first side wall, and an open second side through which the pinch member and biasing spring(s) are inserted into the transverse slot. The block member includes a foot portion and a side wall portion. The foot portion is insertable into the housing through the open second side such that the block member is constrained against movement relative to the housing and the side wall portion of the block member opposes the first side wall of the housing, whereby the pinch member is supported on both lateral sides to prevent tilting of the pinch member.