Device for at least one of injection or aspiration
First Claim
Patent Images
1. A system, comprising:
- an elongate body defining a cavity adapted to contain a material, the elongate body comprising a first opening in communication with the cavity;
a structure movable within the cavity, the structure adapted to be displaced within the cavity to expel an amount of the material from the cavity through the first opening;
a lead screw comprising;
a first portion coupled to the structure;
a second portion; and
a longitudinal axis;
a ratchet gear comprising a plurality of teeth, the ratchet gear coupled to the lead screw, the lead screw being rotatable with the ratchet gear;
a frame member comprising;
a first pawl; and
a second pawl, the first pawl and the second pawl adapted to engage teeth of the ratchet gear; and
an actuator, the actuator operable to oscillate the frame member perpendicular to the longitudinal axis of the lead screw such that the first pawl and the second pawl engage the teeth of the ratchet gear in a manner so as to rotate the ratchet gear in a single direction,wherein at least a portion of the lead screw defines a channel extending parallel to the longitudinal axis, wherein the ratchet gear further comprises a protrusion, and wherein the protrusion of the ratchet gear is received into the channel.
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Abstract
Devices, systems, and associated methods that facilitate the injection and/or aspiration of precisely controlled volumes of fluids at precisely controlled rates are provided. In some implementations, an apparatus may include a syringe and a lead screw connected to a plunger of the syringe. A ratchet gear may be connected to the lead screw. A mechanism may also be included to oscillate a frame in a direction perpendicular to a longitudinal axis of the lead screw such that one or more pawls of the frame engage the teeth of the ratchet gear in a manner that results in rotation of the ratchet gear in a single direction for controlled linear displacement of the plunger.
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Citations
28 Claims
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1. A system, comprising:
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an elongate body defining a cavity adapted to contain a material, the elongate body comprising a first opening in communication with the cavity; a structure movable within the cavity, the structure adapted to be displaced within the cavity to expel an amount of the material from the cavity through the first opening; a lead screw comprising; a first portion coupled to the structure; a second portion; and a longitudinal axis; a ratchet gear comprising a plurality of teeth, the ratchet gear coupled to the lead screw, the lead screw being rotatable with the ratchet gear; a frame member comprising; a first pawl; and a second pawl, the first pawl and the second pawl adapted to engage teeth of the ratchet gear; and an actuator, the actuator operable to oscillate the frame member perpendicular to the longitudinal axis of the lead screw such that the first pawl and the second pawl engage the teeth of the ratchet gear in a manner so as to rotate the ratchet gear in a single direction, wherein at least a portion of the lead screw defines a channel extending parallel to the longitudinal axis, wherein the ratchet gear further comprises a protrusion, and wherein the protrusion of the ratchet gear is received into the channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus comprising:
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a syringe body defining a cavity; a plunger disposed within the cavity, the plunger movable along a length of the syringe body within the cavity to dispense material from the cavity; a lead screw coupled to the plunger; a ratchet gear comprising a plurality of teeth, the ratchet gear coupled to the lead screw such that rotation of the ratchet gear causes rotation of the lead screw; a structure having at least one pawl configured to engage the teeth of the ratchet gear; a mechanism operable to oscillate the structure in a direction perpendicular to a longitudinal axis of the lead screw such that oscillation of the structure perpendicular to the longitudinal axis of the lead screw causes the at least one pawl of the structure to engage the teeth of the ratchet gear in a manner that results in rotation of the ratchet gear in a single direction; and an advancement component selectively engagable with the lead screw, wherein the lead screw comprises a threaded portion, wherein the advancement component comprises a threaded portion, and wherein the threaded portion of the lead screw and the threaded portion of the advancement component cooperate to translate a rotation of the lead screw into a linear movement of the lead screw along the longitudinal axis. - View Dependent Claims (26, 27, 28)
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Specification