Auxiliary appliance for syringe fixation

• US 6,312,410 B1
• Filed: 02/23/1996
• Issued: 11/06/2001
• Est. Priority Date: 10/30/1995
• Status: Expired due to Fees

• Current Assignee: Sugan Co. Ltd. (Sheen Man Co. Ltd.)
• Original Assignee: Sugan Co. Ltd. (Sheen Man Co. Ltd.)
• Inventors: Yamamoto, Tetsuya
• Primary Examiner(s): Sykes, Angela D.
• Application Number:
  US08/606,249
• Time in Patent Office: 2,083 Days
• Field of Search: 604/131, 604/134, 604/140, 604/143, 604/151, 604/152, 604/218, 604/227, 604/228, 604/181, 604/187, 604/154, 604/232, 604/155, 604/905, 604/283, 128/DIG.1, 128/655, 128/654, 600/432, 600/433
• US Class Current: 604/152
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump

Abstract

An auxiliary appliance for syringe fixation according to the present invention comprises a syringe adaptor for fixing a flange part of a syringe to an injection head, and a piston adaptor for connecting a piston to a plunger. Thus, it is possible to attach a syringe, having a different shape from a syringe which can be directly mounted on the injection head, to the injection head.

Claims

1. An auxiliary appliance for syringe fixation, for fixing a syringe having a cylindrical body part, and comprising an injection port and a flange respectively defining an opening on each of front and rear ends thereof, and adapted for sealing a liquid in an internal space defined by a piston having a connection part on the flange side in the interior of the syringe cylindrical body part, to an injection head provided with an opening having an inner peripheral surface provided with an engaging convex part and comprising a plunger having a connection part including a body part with a neck portion smaller than the diameter of its body part and a substantially oval head portion connected to the neck portion with a curved portion having a radius of curvature identical to that of the plunger body part on its forward end for moving the piston in the syringe toward the forward end of the syringe in the opening and injecting the liquid from the syringe through the injection port,

said auxiliary appliance for syringe fixation comprising:

a syringe adaptor for fixing the flange of the syringe to the injection head, said syringe adaptor having a flange receiving part adapted to support a rear surface and an outer surface of the flange and a pair of pivotable holding members pivotable about a pivot axis parallel to the cylindrical body part of the syringe, said pivotable holding members having a disengaged position, and an engaged position for engaging a front surface of the flange and an outer peripheral surface of the syringe cylindrical body to hold the syringe within the flange receiving part; and

a piston adaptor receivable within said syringe adaptor for connecting the piston to the plunger.

2. The auxiliary appliance for syringe fixation in accordance with claim 1, wherein

said syringe adaptor further includes:

a cylindrical body part having a first end and a second end, said flange receiving part and said pair of holding members being positioned at said first end, and

a projection extending from said second end of said syringe adaptor cylindrical body part for engaging with the engaging convex part and for fixing said syringe adaptor to the injection head.

3. The auxiliary appliance for syringe fixation in accordance with claim 1, wherein

said piston adaptor has a first side and a second side, and wherein said piston adaptor comprises:

a connection part at said first side for engaging the connection part of the piston, and

a connection receiving part at said second side for receiving/fixing the connection part of the forward end of the plunger.

4. An auxiliary appliance for syringe fixation, for fixing a syringe having a cylindrical body part, and comprising an injection port and a flange respectively defining an opening on each of front and rear ends thereof, and adapted for sealing a liquid in an internal space defined by a piston having a connection part on the flange side in the interior of the syringe cylindrical body part, to an injection head provided with an opening having an inner peripheral surface provided with an engaging convex part and comprising a plunger having a connection part including a body part with a neck portion smaller than the diameter of its body part and a substantially oval head portion connected to the neck portion with a curved portion having a radius of curvature identical to that of the plunger body part on its forward end for moving the piston in the syringe toward the forward end of the syringe in the opening and injecting the liquid from the syringe through the injection port, said auxiliary appliance for syringe fixation comprising:

a syringe adaptor for fixing the flange of the syringe to the injection head, said syringe adaptor having a flange receiving part adapted to support a rear surface and an outer surface of the flange and a pair of pivotable holding members having a disengaged position, and an engaged position for engaging a front surface of the flange and an outer peripheral surface of the syringe cylindrical body to hold the syringe within the flange receiving part; and

a piston adaptor receivable within said syringe adaptor for connecting the piston to the plunger, said piston adaptor including;

a first side and a second side,

a connection part at said first side for engaging the connection part of the piston, and

a connection receiving part at said second side for receiving/fixing the connection part of the forward end of the plunger;

wherein said connection receiving part comprises;

a substantially cylindrical core member having the same radius of curvature as the curved portion of the head portion of the plunger, and

a cylindrical rotation member rotatable along the outer peripheral surface of said core member,

said rotation member has a substantially oval shaped window part of the same shape as the head portion on one side, said window part being capable of receiving the head portion of the connection part of the plunger, and

said core member has a groove part for receiving the head portion on one side, for fixing the head portion of the plunger to said groove by receiving the head portion after aligning said window part and said groove part with each other and rotating said rotation member by about 90°

.

5. An arrangement for attachment to a syringe injection head provided with an opening having an inner peripheral surface provided with an engaging convex part and comprising a plunger having a connection part including a body part with a neck portion smaller than the diameter of its body part and a substantially oval head portion connected to the neck portion with a curved portion having a radius of curvature identical to that of the plunger body part on its forward end for moving the piston, said arrangement comprising:

a syringe having a cylindrical body part, and comprising an injection port and a flange respectfully defining an opening on each of a front and rear end thereof, said syringe being adapted for scaling a liquid in an internal space defined by a piston having a connection part on the flange side in the interior of the syringe cylindrical body part; and

an auxiliary appliance for syringe fixation including;

a syringe adaptor for fixing the flange of the syringe to the injection head, said syringe adaptor having a flange receiving part adapted to support a rear surface and an outer surface of the flange and a pair of pivotable holding members having a disengaged position, and an engaged position for engaging a front surface of the flange and an outer peripheral surface of the syringe cylindrical body to hold the syringe within the flange receiving part, and

a piston adaptor receivable within said syringe adaptor for connecting the piston to the plunger;

wherein the piston is movable by the plunger within the syringe toward the forward end thereof to inject the liquid from the syringe through the injection poll.