Liquid infusion apparatus

• US 9,005,159 B2
• Filed: 03/31/2011
• Issued: 04/14/2015
• Est. Priority Date: 04/01/2010
• Status: Expired due to Fees

• Current Assignee: WOO Young Medical Company Limited
• Original Assignee: WOO Young Medical Company Limited
• Inventors: Lee, Young Gyu
• Primary Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US13/637,493
• Publication Number:
  US 20130211323A1
• Time in Patent Office: 1,475 Days
• Field of Search: 604/65, 604/67, 604/131, 604/151
• US Class Current: 604/67
• CPC Class Codes: A61M 2005/16863 Occlusion detection
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 5/14212 Pumping with an aspiration and an expulsion action
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: A61M 5/16813 by controlling the degree of opening of the flow line
• CPC Class Codes: A61M 5/16854 by monitoring line pressure
• CPC Class Codes: F04B 43/082 the tubular flexible member being pressed against a wall by a number of elements, each having an alternating movement in a direction perpendicular to the axes of the tubular member and each having its own driving mechanism

Abstract

The present invention relates to a liquid infusion apparatus, including: a finger module provided in a main body such that the finger module can elastically move backward from a liquid delivery tube; a tube clamp, in which two clamp bodies spaced apart from each other approach each other by means of restoring force of an elastic member upon the opening of a door during infusion, so as to compress and block the liquid delivery tube; and a tube blockage detection device which detects whether the liquid delivery tube is blocked by a cause, for example, when the outlet-side portion of the liquid delivery tube, which delivers medicinal liquid pumped by a liquid pump during infusion, is bent.

Claims

1. A liquid infusion apparatus, comprising:

a main body having an opening;

a door installed on the main body so as to be openable, wherein when the door is closed, the door faces the opening with a liquid infusion tube interposed between the door and the opening and supports the liquid infusion tube;

a finger module comprising a plurality of fingers installed in the main body so as to be movable forward and backward relative to the opening, the fingers moving in conjunction with a cam shaft in a wiggling manner in which the fingers successively move forward to the opening and compress a portion of the liquid infusion tube through the opening;

an elastic member applying elastic force to the finger module and biasing the finger module forward so that the liquid infusion tube is elastically compressed by the fingers; and

cam shaft drive means rotating the cam shaft so that the fingers move in conjunction with the cam shaft in the wiggling manner,

wherein the finger module comprises a mounting block provided such that the fingers are able to move in conjunction with the cam shaft in the wiggling manner and compress the liquid infusion tube,

wherein the mounting block is mounted to the main body in such a way that the mounting block is able to move forward and backward relative to the opening under guidance of a guide, and

the cam shaft drive means comprises a motor and a power transmission unit transmitting rotational force of the motor to the cam shaft,

wherein the motor is installed in the mounting block, and the cam shaft drive means moves along with the finger module forward and backward relative to the opening,

wherein the main body comprises a front casing having the opening; and

a rear casing coupled to the front casing,

the guide comprises a plurality of guide pins coupled to the front casing and disposed in predetermined portions of the mounting block, and

the elastic member comprises a plurality of elastic members provided around the respective guide pins to bias the mounting block forward.

2. The liquid infusion apparatus according to claim 1, wherein

the mounting block has a shaft support part supporting an output shaft of the motor, and

the motor is coupled to the shaft support part by a coupling member made of an anti-vibration material.

3. The liquid infusion apparatus according to claim 1, wherein a shock absorber is provided on at least one of portions of the main body and the finger module that face each other.

4. The liquid infusion apparatus according to claim 1, further comprising

a cover sheet covering the opening to prevent a foreign substance from entering the main body through the opening, the cover sheet being made of a soft material.