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Motorized syringe pump

  • US 5,176,646 A
  • Filed: 02/19/1991
  • Issued: 01/05/1993
  • Est. Priority Date: 02/19/1991
  • Status: Expired due to Fees
First Claim
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1. A syringe pump which includes a casing for containing liquid therein and a piston disposed movably in the casing for discharging a liquid, comprising:

  • a frame having a mount for mounting one of the casing and piston thereon;

    a movable member supported movably on said frame and having the other of the casing and piston attachable thereon;

    a drive mechanism including a motor disposed on said frame, a drive roller attached to an output shaft of said motor, a follower roller attached rotatably on said frame, a transmission member attached to said drive roller and follower roller for transmitting the torque of said drive roller to said follower roller;

    a drive force converting mechanism including a transmission roller attached rotatably to said movable member for converting the movement of said transmission member to rotation, a transmission gear attached rotatably to said movable member, a speed increasing mechanism disposed between said transmission roller and said transmission gear for increasing the speed of transmission roller and transmitting the increased speed of said transmission roller to said transmission gear;

    an endless guide member engaged with said transmission gear for guiding said movable member;

    a clutch mechanism including a rotating member engaged with said guide member and a rotation preventing member disengageably engaging said rotating member for preventing rotation of said rotating member, the rotating member and rotation preventing member having teeth provided on facing ends thereof and engaging each other.

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