Syringe pump

• US 20050215850A1
• Filed: 03/29/2004
• Published: 09/29/2005
• Est. Priority Date: 03/29/2004
• Status: Abandoned Application

• Current Assignee: Amnon Weichselbaum, Ronnie Klein
• Original Assignee: Amnon Weichselbaum, Ronnie Klein
• Inventors: Weichselbaum, Amnon, Klein, Ronnie
• Application Number:
  US10/810,686
• Publication Number:
  US 20050215850A1
• Time in Patent Office: Days
• US Class Current: 600/35
• CPC Class Codes: A61M 2005/14513 with secondary fluid driving or regulating the infusion
• CPC Class Codes: A61M 2005/2086 having piston damping means, e.g. axially or rotationally acting retarders
• CPC Class Codes: A61M 5/1454 spring-actuated, e.g. by a clockwork
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287

Abstract

A syringe pump including a syringe including a plunger that slides in a body which has a discharge port, a driving mechanism coupled to the syringe, including a cylinder in which a piston mounted on a shaft slides, and a biasing device operative to apply an urging force on the piston to drive the piston distally in the cylinder, and a safety catch that initially prevents the biasing device from moving the piston, the safety catch being removable to permit the biasing device to move the piston.

Claims

1. A syringe pump comprising:

a syringe comprising a plunger that slides in a body which has a discharge port;

a driving mechanism coupled to said syringe, comprising a cylinder in which a piston mounted on a shaft slides, and a biasing device operative to apply an urging force on said piston to drive said piston distally in said cylinder; and

a safety catch that initially prevents said biasing device from moving said piston, said safety catch being removable to permit said biasing device to move said piston.

2. The syringe pump according to claim 1, wherein said cylinder is at least partially filled with a hydraulic fluid.

3. The syringe pump according to claim 2, wherein said piston is formed with a vent hole that passes through the thickness of said piston and is in fluid communication with a port in said shaft, wherein said vent hole and said port permit flow of said hydraulic fluid from a distal portion of said cylinder in front of said piston to a proximal portion of said cylinder behind said piston.

4. The syringe pump according to claim 2, wherein a biasing force of said biasing device on said piston and a hydraulic damping of said hydraulic fluid provide a close-to-linear pumping force.

5. The syringe pump according to claim 1, wherein said driving mechanism is coupled to a head of said plunger with a clasp.

6. The syringe pump according to claim 1, wherein said biasing device comprises a coil spring disposed on a portion of said shaft.

7. The syringe pump according to claim 1, wherein said syringe contains sperm therein.

8. The syringe pump according to claim 1, wherein said syringe and said driving mechanism are housed in a casing.

9. The syringe pump according to claim 8, wherein said casing has a window through which travel of said driving mechanism is observable.