Peristaltic pump with tube holding mechanism

Claim 2

A peristaltic pump comprising: a housing, means for imparting rotational motion through a shaft to roller assembly means mounted on said housing for engaging and compressing a flexible tube to continuously displace fluid through said flexible tube, said flexible tube being held in contact with said roller assembly means by shoe means moveably mounted on said housing adjacent said roller assembly means and moveable cam means positioned on each side of said roller assembly means, said cam means comprising a shaft, a cam assembly rotatably mounted on said shaft, spring means engaging said cam assembly urging said cam assembly against said flexible tube, a second cam means connected to said shoe means moving said shoe means into a position of engagement with said tubing, said shoe means comprising a body defining an arcuate surface for contacting said flexible tube when moved to a position of engagement, said shoe means being adapted for displacement in one direction to engage a portion of said tube and hold it in engagement with said compressive roller assembly means or displacement in the other direction to disengage said tube from said roller assembly means and permit its removal from said pump.

Claim 3

A peristaltic pump comprising: means for imparting rotational motion to a roller assembly for engaging and compressing a flexible tube to cyclically displace fluid in said tube, said roller assembly means comprising roller means mounted within a housing disposed on a shaft connected to said rotational motion means such that rotation of said shaft and housing causes orbital rotation of said roller means around said shaft; said roller assembly means being mounted on a pump housing, shoe means mounted on said pump housing for movement thereon relative to said pump housing to permit either displacement in a first direction to engage and hold a portion of said tube on said roller assembly means together with clamp means for intermittent engagement with said orbiting roller meansor displacement in an opposite direction to the first direction to disengage from said flexible tube on said assembly means and permit removal of said flexible tube from the pump housing, said clamp means comprising a pair of clamp assemblies spaced apart on either side of said roller assembly means adapted to engage and hold a portion of said tube keeping said tube from walking when engaged by said roller assembly means, said shoe means movement being effected by means of a movable shaft which is mounted to said shoe means.

Claim 4

A peristaltic pump comprising: means for imparting rotational motion to a roller assembly for engaging and compressing a flexible tube to cyclically displace fluid in said tube, said roller assembly means comprising roller means mounted within a housing disposed on a shaft connected to said rotational motion means such that rotation of said shaft and housing causes orbital rotation of said roller means around said shaft; said roller assembly means being mounted on a pump housing, shoe means mounted on said pump housing for movement thereon relative to said pump housing to permit either displacement in a first direction to engage and hold a portion of said tube on said roller assembly means together with clamp means for intermittent engagement with said orbiting roller meansor displacement in an opposite direction to the first direction to disengage from said flexible tube on said assembly means and permit removal of said flexible tube from the pump housing, said clamp means comprising a pair of clamp assemblies spaced apart on either side of said roller assembly means adapted to engage and hold a portion of said tube keeping said tube from walking when engaged by said roller assembly means, said shoe means movement being effected by means of a movable shaft which is mounted to said shoe means.

Claim 5

The peristaltic pump of claim 2 wherein said clamp means comprises a one piece rotatable cam and shaft, spring means mounted to said shaft engaging said cam to constantly urge said cam toward said tubing.

Claim 6

A peristaltic pump as claimed in claim 3 comprising a body, a curved arm extending from said body and a plurality of knurles formed on the surface of said arm.

Claim 7

A peristaltic pump as claimed in claim 4 wherein said curved arm has a finger projections member extending outwardly from said arm.

Claim 8

A peristatic pum as claimed in claim 4 wherein a surface of said curved arm has an abrasive coating.

Claim 9

A peristaltic pump comprising a pump housing, a roller assembly means mounted to said housing, said roller assembly means being adapted to engage and compress a flexible tube to continuously displace measured equal units of fluid passed through said tube, means to drive said roller assembly in a rotational manner, a shoe means moveably mounted on said housing adjacent said roller assembly, means to drive said shoe means in one direction to engage a portion of a flexible tube when said flexible tube is placed in said roller assembly, locking means mounted on said pump housing on either side of said roller assembly means, said shoe means being locked into position against said flexible tube by said drive means and forming a lock when closed, said shoe means comprising a body defining an arcuate inner surface adapted to engage said flexible tube and forming a cresent shaped configuration with the ends of the cresent being provided with a locking surface forming two lock points with said locking means holding said flexible tube in place thereby preventing the walking of the tube when the roller assembly is rotated.

Claim 10

A peristaltic pump comprising a pump housing, a roller assembly means mounted to said housing, said roller assembly means being adapted to engage and compress a flexible tube to continuously displace measured equal units of fluid passed through said tube, means to drive said roller assembly in a rotational manner, a shoe means moveably mounted on said housing adjacent said roller assembly, means to drive said shoe means in one direction to engage a portion of a flexible tube when said flexible tube is placed in said roller assembly, locking means mounted on said pump housing on either side of said roller assembly means, said shoe means being locked into position against said flexible tube by said drive means and forming a lock when closed, said shoe means comprising a body defining an arcuate inner surface adapted to engage said flexible tube and forming a cresent shaped configuration with the ends of the cresent being provided with a locking surface forming two lock points with said locking means holding said flexible tube in place thereby preventing the walking of the tube when the roller assembly is rotated.

Claim 11

A peristaltic pump as claimed in claim 7 wherein the locking surfaces on the ends of the cresent are knurled.

Claim 12

A peristaltic pump as claimed in claim 7 wherein the locking surfaces on the ends of the cresent have an abrasive coating.