Patent ID: 6213981
Filing Date: 2001-04-10
Classification: A61M

Abstract:
A liquid medicine self-administration device comprising: a casing having first and second opened ends;a port portion having a liquid medicine inlet port and a liquid medicine outlet port and closing the first open end of said casing;a reservoir having an open end attached to and closed by said port portion and a closed end, said reservoir being easily deformed by pressing and being easily restored to its original shape;pushing means for pressing and deforming said reservoir such that when said reservoir is pressed and deformed by said pushing means, a liquid medicine is delivered from said liquid medicine outlet port, said pushing means comprising a cylindrical member having a closed end and an open end, the open end of the cylindrical member being slidably inserted into the second open end of said casing along the inner wall of said casing; a spring member having first and second ends and housed within said cylindrical member, the first end of said spring being adjacent the closed end of said cylindrical member; and a pushing portion attached to the second end of said spring member and arranged to contact the closed end of said reservoir; andengaging means provided in said casing such that when said cylindrical member is slid toward said port portion, said engaging means automatically engages said cylindrical member at a sliding end position and can be manually released from the engaging position,whereby when said cylindrical member is slid toward said port portion to be brought into engagement with said engaging means, said spring member is compressed and said pushing portion presses the reservoir by the spring force of said spring member.