Peristaltic pump device having an insert cassette of reduced complexity
First Claim
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1. A peristaltic pump system, characterized in that it comprises:
- a first assembly comprising;
rotary drive means;
a shaft rotated by said drive means and having a free end;
a housing presenting a cavity into which said free end of said shaft projects;
a plurality of wheels, each wheel having a pivot axis and an active tread face that is symmetrical about said axis; and
mounting means for said wheels and comprising;
a plate mounted to move in said cavity along the axis of said shaft and having an orifice suitable for allowing the free end of said shaft to pass therethrough; and
movable means movable in rotation about the axis of said shaft relative to said plate, said movable means comprising means for substantially preventing said wheels from moving in translation relative to said plate along their pivot axes, for holding the pivot axes of said wheels parallel to said axis of the shaft, for allowing each wheel to rotate, and for guiding the axes of said wheels in translation along radial directions; and
a second assembly, independent of the first and comprising;
a wall including at least a cylindrical portion; and
a deformable tubular duct secured to the inside face of said wall;
whereby, by engaging said second assembly around the wheels of the first assembly, the tread walls of said wheels come into contact towards the axis of rotation of the mounting means in such a manner that a portion of each wheel is disposed facing said orifice; and
whereby, by pushing down said mounting means into the cavity of said first assembly, the free end of said shaft penetrates through said orifice so that the side wall of the shaft co-operates with said wheels to spread said wheels apart in radial directions away from the axis of the shaft, thereby causing said tubular duct to be locally squeezed between said wheels and said wall of said second assembly.
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Abstract
The invention relates to a peristaltic pump system. The pump system comprises both an insert (10) and a motor assembly (30). The insert essentially comprises a wall (16) and a duct (22) of deformable material. The motor assembly comprises a drive shaft (38), a plate (50) on which rotary means (54, 64) are mounted to guide wheels (48) suitable for co-operating with the duct (22). When the shaft (38) is inserted, the wheels (48) are spread outwards and compress the duct (22) between themselves and the wall (16) of the insert.
158 Citations
13 Claims
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1. A peristaltic pump system, characterized in that it comprises:
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a first assembly comprising; rotary drive means; a shaft rotated by said drive means and having a free end; a housing presenting a cavity into which said free end of said shaft projects; a plurality of wheels, each wheel having a pivot axis and an active tread face that is symmetrical about said axis; and mounting means for said wheels and comprising; a plate mounted to move in said cavity along the axis of said shaft and having an orifice suitable for allowing the free end of said shaft to pass therethrough; and movable means movable in rotation about the axis of said shaft relative to said plate, said movable means comprising means for substantially preventing said wheels from moving in translation relative to said plate along their pivot axes, for holding the pivot axes of said wheels parallel to said axis of the shaft, for allowing each wheel to rotate, and for guiding the axes of said wheels in translation along radial directions; and a second assembly, independent of the first and comprising; a wall including at least a cylindrical portion; and a deformable tubular duct secured to the inside face of said wall; whereby, by engaging said second assembly around the wheels of the first assembly, the tread walls of said wheels come into contact towards the axis of rotation of the mounting means in such a manner that a portion of each wheel is disposed facing said orifice; and whereby, by pushing down said mounting means into the cavity of said first assembly, the free end of said shaft penetrates through said orifice so that the side wall of the shaft co-operates with said wheels to spread said wheels apart in radial directions away from the axis of the shaft, thereby causing said tubular duct to be locally squeezed between said wheels and said wall of said second assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification