Peristaltic pumps
First Claim
Patent Images
1. A peristaltic pumphead comprising;
- a pumphead housing;
a tube accommodated in the pumphead housing, the tube having opposite ends; and
driving means adapted to cause a peristaltic action in the tube, the tube being provided at each end with a respective end fitting which is fixedly permanently secured to the tube by a collar swaged onto each end of said tube and is adapted for connection to further equipment, wherein each end fitting has a non-circular locating flange received in a complementary recess in the pumphead housing in a manner which secures the ends of the tube releasably in the pumphead housing against lengthwise displacement and rotation of each, of the tube ends relative to the pumphead housing thereby to prevent lengthwise displacement and rotation of each end of the tube relative to the pumphead housing.
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Accused Products
Abstract
A peristaltic pump comprises a housing (2) in which a peristaltic action is applied to a tube (6) by a rotor (4). The tube (6) has locating means in the form of flanges (16) at each end, which ensure proper positioning of the tube (6) within the housing (2). The housing (2) makes a fluid-tight seal with the flanges (16) so that the interior of the housing (2) is isolated from the ambient surroundings. The flanges (16) are non-circular and fit in complementary recesses (30), (32) in the housing (2) so that, when installed, the tube (6) is not twisted between its ends.
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Citations
15 Claims
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1. A peristaltic pumphead comprising;
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a pumphead housing;
a tube accommodated in the pumphead housing, the tube having opposite ends; and
driving means adapted to cause a peristaltic action in the tube, the tube being provided at each end with a respective end fitting which is fixedly permanently secured to the tube by a collar swaged onto each end of said tube and is adapted for connection to further equipment, wherein each end fitting has a non-circular locating flange received in a complementary recess in the pumphead housing in a manner which secures the ends of the tube releasably in the pumphead housing against lengthwise displacement and rotation of each, of the tube ends relative to the pumphead housing thereby to prevent lengthwise displacement and rotation of each end of the tube relative to the pumphead housing. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A peristaltic pumphead comprising:
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a pumphead housing having an arcuate track;
a tube accommodated in the arcuate track, the tube having opposite ends; and
a driving rotor situated within the pumphead housing and engaging the tube to periodically compress the tube against the arcuate track to cause a peristaltic action in the tube, the tube being provided at each end with a respective end fitting which is fixedly secured to the tube by a collar that is swaged onto each end of the tube and is adapted for connection to further equipment, wherein each end fitting has a non-circular locating flange received in a complementary recess in the pumphead housing thereby to locate the ends of the tube releasably in the pumphead housing against lengthwise displacement and rotation of each end of the tube relative to the pumphead housing. - View Dependent Claims (9, 10, 11, 12)
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13. A peristaltic pumphead including a peristaltic pumphead comprising;
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a pumphead housing having an arcuate track;
a tube accommodated in the arcuate track, the tube having opposite ends each of said ends being surrounded by a collar that is swaged onto each end of the tube; and
a driving rotor situated within the pumphead housing and engaging the tube to periodically compress the tube against the arcuate track to cause a peristaltic action in the tube, the tube being provided at each end with a respective end fitting which is fixedly secured to the tube by said swaged collar and is adapted for connection to further equipment, wherein each end fitting has a non-circular and nonrectilinear locating flange having a flat peripheral portion, a semicircular portion the ends of which are connected to the flat peripheral portion by two parallel straight edge portions, and wherein the pumphead housing has recesses receiving the respective flanges, the recesses having a shape which is complementary to the shape of the respective flange, thereby to locate the ends of the tube releasably in the pumphead housing against lengthwise displacement and rotation of each end of the tube relative to the pumphead housing.
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14. A peristaltic pumphead comprising;
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a pumphead housing;
a tube accommodated in the pumphead housing, the tube having opposite ends; and
driving means adapted to cause a peristaltic action in the tube, the tube being provided at each end with a respective end fitting which comprises a rigid element fixedly secured at said tube end and adapted for connection to further equipment, wherein each end fitting has a locating flange received in a complementary recess in the pumphead housing in a manner which secures the ends of the tube releasably in the pumphead housing against lengthwise displacement and rotation of each of the tube ends relative to the pumphead housing, the material of the tube being disposed in surrounding integral relation to the rigid element, and extending over a radially extending surface and a peripheral axially extending surface of the locating flange. - View Dependent Claims (15)
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Specification