Fluid pump drive mechanism
First Claim
Patent Images
1. An apparatus for establishing a substantially nonpulsitile flow of fluid through a resilient tube, which comprises:
- means for urging against said tube with a variable force to constrict said tube and establish a substantially constant fluid flow therethrough; and
means for converting a substantially constant force into said variable force.
15 Assignments
0 Petitions
Accused Products
Abstract
A drive mechanism for actuating the fingers of a peristaltic pump has a base, and a drive member reciprocally mounted on the base. A jointed arm is pivotally attached at one end to the drive member and at the other end to a fixed point on the base. A rotary cam actuator is mounted on the base to urge against the arm to reciprocate the drive member.
27 Citations
29 Claims
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1. An apparatus for establishing a substantially nonpulsitile flow of fluid through a resilient tube, which comprises:
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means for urging against said tube with a variable force to constrict said tube and establish a substantially constant fluid flow therethrough; and means for converting a substantially constant force into said variable force. - View Dependent Claims (2, 3)
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4. A reciprocal drive mechanism for pumping fluid through a resilient tube which comprises:
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a base; a means for holding said tube on said base; a drive member reciprocally mounted on said base for urging against said tube to constrict said tube and regulate fluid flow through said tube; a set point fixedly mounted on said base; a joined arm having a first end pivotally attached to said set point and a second end pivotally attached to said drive member; and an actuator mounted on said base for urging against said arm to reciprocate said drive member. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A mechanism for reciprocating a drive member against a resilient tube which comprises:
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a base for reciprocally supporting said drive member; a means for holding said tube on said base between said base and said drive member; a jointed arm having a first end pivotally attached to said base and a second end pivotally attached to said drive member; and an actuator mounted on said base for urging against said jointed arm to reciprocate said drive member from an extended position wherein said tube is compressed to a withdrawn position wherein said tube is open. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A mechanism for reciprocating a drive member on a base against a resilient tube which comprises:
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a means for holding said tube on said base; a jointed arm connecting said drive member at a first end to said base at a second end, said arm having a first link and a second link pinned to said first link to establish a joint between said first end and said second end, said arm configurable between a first configuration wherein said drive member is in an extended position and said tube is constricted and a second configuration wherein said drive member is in a withdrawn position and said tube is open; and an actuator mounted on said base and connected with said arm to alternatingly move said arm between said first and second configurations. - View Dependent Claims (18, 19, 20, 21)
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22. A reciprocal drive mechanism actuated by a motor for pumping fluid through a resilient tube which comprises:
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a base for supporting said tube and said motor; a drive member reciprocally mounted on said base for contacting said tube to urge fluid through said tube; jointed means pivotably attached to said drive member and said base for transforming rotating motion of said motor into reciprocal motion of said drive member; and cam means operably connected between said motor and said jointed means for establishing a substantially constant torque on said motor during equal increments of rotation of said motor and for establishing substantially equal increments of volumetric fluid flow through said tube for said equal increments of rotation of said motor. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification