Linear peristaltic pump
First Claim
1. A linear peristaltic pump apparatus for pumping liquids comprising:
- a pump housing (22);
a high durometer compressible elastomeric liquid flow tube (12) carried by the housing (22);
an infeed valve assembly (26);
an outfeed valve assembly (38);
a discrete extensible and retractable displacement actuating assembly (36) including a movable actuator anvil (34) having a round surface which engages the flow tube (12) at all times;
a spaced apart top anvil (24.1) mounted in a location directly opposite from the actuator anvil (34), the top anvil (24.1) having a round surface in engagement with the flow tube at all times, the flow tube being held between the movable actuating anvil and the top anvil in a slightly compressed state when the actuating assembly is retracted, and the lumen of the flow tube not being completely reduced to zero volume during displacement compression whereby gas embolisms do not erupt or explode when discharged; and
control means (100) for sequentially extending and retracting the actuating assembly (36) to cause flow within the flow tube (12) from a location adjacent the infeed valve assembly (26) to a location adjacent the outfeed valve assembly (38).
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Accused Products
Abstract
A liquid pumping apparatus for pumping liquids, more specifically a linear peristaltic pump apparatus. The apparatus consists of a high durometer compressible elastomeric liquid flow tube (12), an infeed valve assembly (26), an outfeed valve assembly (38), an extensible and retractable actuator anvil (34) having a round surface which engages the flow tube (12) at all times, an opposed anvil (24.1) having a round surface in engagement with the flow tube at all times, the flow tube being held between the anvils (34, 24.1) in a slightly compressed state when the anvil (34) is retracted, and a control assembly (100) for causing the movable anvil to be sequentially extended and retracted to cause flow within the flow tube (12) from the infeed valve assembly (26) to the outfeed valve assembly (38). With this apparatus the lumen of the flow tube (12) to the sides of the anvils is not completely reduced to zero volume during displacement compression whereby gas embolisms do not erupt or explode when discharged. Two principal embodiments are disclosed, one having infeed and outfeed check valves which oclude the flow tube, and the other having check valves.
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Citations
78 Claims
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1. A linear peristaltic pump apparatus for pumping liquids comprising:
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a pump housing (22);
a high durometer compressible elastomeric liquid flow tube (12) carried by the housing (22);
an infeed valve assembly (26);
an outfeed valve assembly (38);
a discrete extensible and retractable displacement actuating assembly (36) including a movable actuator anvil (34) having a round surface which engages the flow tube (12) at all times;
a spaced apart top anvil (24.1) mounted in a location directly opposite from the actuator anvil (34), the top anvil (24.1) having a round surface in engagement with the flow tube at all times, the flow tube being held between the movable actuating anvil and the top anvil in a slightly compressed state when the actuating assembly is retracted, and the lumen of the flow tube not being completely reduced to zero volume during displacement compression whereby gas embolisms do not erupt or explode when discharged; and
control means (100) for sequentially extending and retracting the actuating assembly (36) to cause flow within the flow tube (12) from a location adjacent the infeed valve assembly (26) to a location adjacent the outfeed valve assembly (38). - View Dependent Claims (2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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3. A linear peristaltic pump apparatus for pumping liquids comprising:
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a pump housing (22);
a high durometer compressible elastomeric liquid flow tube (12) carried by the housing (22);
at least three discrete extensible and retractable actuating assemblies carried by the housing, including one occlusive infeed valve actuator assembly (26), one or more displacement actuator assemblies (36), and one occlusive outfeed valve actuator assembly (38), each actuating assembly including a movable actuator anvil (34) having a round surface which engages the flow tube (12) at all times;
spaced apart top anvils (24.1), each mounted in a location directly opposite from the corresponding actuator anvil (34) and having a round surface in engagement with the flow tube at all times, the flow tube being held between the movable actuator anvils and the top anvils in a slightly compressed state when the actuating assemblies are retracted; and
control means (100) for sequentially extending and retracting the actuating assemblies (26, 36, 38) to cause flow within the flow tube (12) from a location adjacent the infeed valve actuator assembly (26) to a location adjacent the outfeed valve actuator assembly (38), whereby the apparatus can pump highly particulated or non-homogeneous liquids and slurries effectively because of the dual symmetrical anvil design which serves to provide an efficient mechanism to move solids sway from the occlusion contact areas of the pump elements such that large solids are not trapped at the occlusion points of the pump elements and the large inclusions pass through the pump essential undamaged. - View Dependent Claims (4, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78)
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5. A linear peristaltic pump apparatus for pumping liquids comprising:
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a rigid generally channel shaped pump housing (22);
a high durometer compressible elastomeric liquid flow tube (12) mounted within the channel shaped pump housing (22);
at least three discrete extensible and retractable actuating assemblies carried by the housing, including one occlusive infeed valve actuator assembly (26), one or more displacement actuator assemblies (36), and one occlusive outfeed valve actuator assembly (38), each actuating assembly including a linear actuator and a movable actuator anvil (34) having a round surface which engages the flow tube (12);
a cover plate (24) provided with spaced apart round shaped top anvils (24.1) such that when assembled to the housing (22) each top anvil (24.1) is in a location directly opposite from a corresponding actuator anvil (34);
cover plate mounting means (50) for assembling the cover plate (24) to the housing (22) with the top anvils (24.1) bearing against the flow tube (12) in such a manner that the flow tube is slightly compressed; and
control means (100) for sequentially extending and retracting the actuating assemblies (26, 36, 38) in such a manner as to cause flow within the flow tube (12) from a location adjacent the infeed valve actuator assembly (26) to a location adjacent the outfeed valve actuator assembly (38). - View Dependent Claims (33, 34, 35, 36, 38, 39, 40, 41, 42, 43, 44)
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37. The linear peristaltic pump apparatus as set forth in 35 wherein a unitized spacer (23) consisting of a single serpentine shaped piece is overlaid onto the original cover plate (24) and then assembled to the pump body (22) utilizing the cover plate mounting means (50) so that the round shaped top anvils (24.1) are forced closer to the actuator anvils (34), thus establishing the desired and proper degree of symmetrical compression capture when a smaller diameter tube is used.
Specification