A peristaltic pump has an arcuate raceway with a partially concave inner surface extending through an arc of at least one hundred eighty degrees (180°). The arc defines a midpoint, and a rotor faces the inner surface of the raceway and is both rotatable relative to the raceway and translationally movable relative to the raceway between a pump position, wherein the rotor is spaced from the midpoint a first distance, and a tube load position, wherein the rotor is spaced from the midpoint a second distance greater than the first distance. A motor is coupled to the rotor to rotate the rotor plural are rollers arranged on the rotor to contact tubing disposed between the rotor and the raceway when the rotor is in the pump position. The motor is prevented from stopping at a predetermined angular position to facilitate loading and unloading tubing.

A peristaltic pump and an analyzer for testing a biological sample, wherein the pump includes a pump head that is constructed as a screwless assembly, wherein the pump includes a bayonet and/or a beam coupling, and/or wherein rollers of the pump are configured to be pivoted about corresponding pivot axes that intersect with the roller axes.

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.

A double-roller hose pressing apparatus for a peristaltic pump is provided. Two sides of a working hose (3) in the peristaltic pump are respectively provided with a set of flexible-rolling rollers (2) configured for pressing hose, and the two sets of rollers (2) are arranged in relative positions to clamp the working hose (3) during operation.

A rotor assembly for a peristaltic pump is provided. The rotor assembly includes a hub configured to couple with a drive shaft of a pump. The hub includes at least one receiving slot that extends longitudinally along an outer surface of the hub. The rotor assembly further includes a roller assembly configured to slide longitudinally along the receiving slot to seat the roller assembly onto the hub.

The present invention involves a rotary peristaltic pump and associated method employing the relaxation of pressure on flexible tubing between the rotor and stator of the pump to restore the rotor to a start angle while a valve on the output of the pump is closed to avoid progress of fluid through the system. Three different implementations of the pump and method are presented including reciprocating the stator, reciprocating the rotor, and retracting the idler rollers of the rotor into the rotor to relieve the pressure on the flexible tubing. A controller ensures the appropriate switching and timing of the valve and rotor of the pump. The pump and associated method are directed to the precision dispensing of pharmaceutical fluids into containers, including containers held in container nests.

A double-roller hose pressing apparatus for a peristaltic pump is provided. Two sides of a working hose (3) in the peristaltic pump are respectively provided with a set of flexible-rolling rollers (2) configured for pressing hose, and the two sets of rollers (2) are arranged in relative positions to clamp the working hose (3) during operation.

A peristaltic pump and an analyzer for testing a biological sample, wherein the pump includes a pump head that is constructed as a screwless assembly, wherein the pump includes a bayonet and/or a beam coupling, and/or wherein rollers of the pump are configured to be pivoted about corresponding pivot axes that intersect with the roller axes.

A toggle-type open-close clamping structural assembly and a pump head of a peristaltic pump comprising same. The toggle-type open-close clamping structural assembly comprises: a lower pipe clamp and an upper pipe clamp (1) that are oppositely arranged and that are used to form a pair of hose clamp hoops; an upper pressure block used for lifting and lowering to open and close; and a driving lever (4) used for enabling the upper pipe clamp (1) to follow the upper pressure block to lift, slip and follow-up. The driving lever (4) is pivotally connected to the upper pressure block. The upper pipe clamp (1) and one end of the driving lever (4) are overlappingly disposed in a clamping port reserved on the upper pressure block, and the other end of the driving lever (4) is abutted against a fixing part (5) that serves as fixing reference. In the lifting process of the upper pressure block, the upper pipe clamp (1) is driven to lift, and meanwhile, the driving lever (4) follows up and rises and lifts up the upper pipe clamp (1), so that the upper pipe clamp (1) is far away from the lower pipe clamp, thereby preventing the driving lever (4) from wear and tear and achieving simple and efficient replacement of hoses.

Provided is a tube pump including: first and second roller units that rotate about the axis while being in contact with a tube; a drive shaft arranged on the axis and coupled to the first roller unit; a drive cylinder arranged on the axis and coupled to the second roller unit; a first drive unit configured to rotate the drive shaft in a predetermined direction about the axis and having a first drive shaft configured to rotate about the axis; and a second drive unit configured to rotate the drive cylinder in the predetermined direction about the axis and having a second drive cylinder configured to rotate about the axis, the drive shaft is arranged to penetrate through the second drive unit along the axis, and the drive cylinder is arranged on an outer circumference side of the drive shaft and rotatably about the axis independently of the drive shaft.