Digital dispenser

• US 4,959,056 A
• Filed: 06/14/1988
• Issued: 09/25/1990
• Est. Priority Date: 06/14/1988
• Status: Expired due to Term

• Current Assignee: Wayne State University
• Original Assignee: Wayne State University
• Inventors: Welch, Robert, Dombrowski, Mitchell
• Primary Examiner(s): Yasko, John D.
• Assistant Examiner(s): CERMAK, ADAM
• Application Number:
  US07/206,607
• Time in Patent Office: 833 Days
• Field of Search: 604/135, 604/207, 604/211, 604/130, 604/152, 604/186
• US Class Current: 604/186
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 5/1782 Devices aiding filling of syringes in situ combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003

Abstract

A digital dispenser aid device (10) of the type for use with a syringe (12) includes a housing (24). The syringe (12) can be fixedly mounted within a chamber (28) within the housing (24). A body member 54 includes a recessed portion (56) retaining the cap portion (22) of a plunger (20) therein. The body member (54) is moveable for drawing the plunger (20) of the barrel (14) to draw medicant into the barrel (14). A digital readout display is operatively connected to the body member (54) for projecting a digital output quantitating the amount of fluid drawn into the barrel (14) by movement of the plunger (20) axially out from the barrel (14).

Claims

1. An aid device (10) of the type for use with a syringe (12) including a barrel (14) for containing a medicant therein and supporting a needle (18) thereon and a plunger (20) having one end operatively disposed within the barrel (14) and a second end including a cap portion (22), said device (10) comprising:

housing means (24) including a chamber (28) having a length defining an axis, said housing means (24) having a base portion (30);

barrel holder means (34) fixedly mounted within said housing means (24) for holding the barrel (14) of the syringe (12) in a fixed position parallel to said axis while exposing the needle (18) from said housing means (24);

plunger holder means (25) mounted within said housing (24) and movable therein along said axis relative to said barrel holder means (34) for holding the plunger (20) and moving the plunger (20) axially relative to the barrel (14);

digital readout means operatively connected to said plunger holder mean s (25) for projecting a digital output quantitating the amount of medicant drawn into the barrel (14) by movement of the plunger (20) axially away from the base portion (30);

actuator means operatively connected to said plunger holder means (25) for moving said plunger holder means (25) relative to said barrel holder means (34), said actuator means including a vernier screw (44) having a head portion (46) disposed outside of said housing means (24) and a threaded portion (48) extending parallel relative to said axis, said plunger holder means (25) including follower means (50) threadedly connected to said threaded portion (48) for operatively connecting said plunger holder means (25) to said threaded portion (48) whereby turning of said head portion (46) in one direction moves said plunger holder means (25) away from said base portion for drawing the plunger (20) from the barrel (14) and drawing medication into the barrel (14); and

release means for operatively releasing said plunger holder means (25) from said threaded portion (48) and biasing means (52) for forcing said plunger holder means (25) towards said base portion (30) along said axis when said release means releases said plunger holder means (25) whereby the plunger (20) is forced into the barrel (14) to eject medication therefrom.

2. An aid device as set forth in claim 1 further characterized by said digital readout means including a numerical LED or LCD digital display (40).

3. An aid device as set forth in claim 1 further characterized by said digital readout means including a sound projecting digital display.

4. An aid device as set forth in claim 1 further characterized by said plunger holder means (25) including a body member (54) having a recessed portion (56) therein containing the cap portion (22) of the plunger (20) and an opening (58) extending therethrough, said housing means (24) including a pin member (60) supported therein and extending parallel relative to said axis, said pin member (60) extending through said opening (58) for guiding the reciprocating movement of said body member (54) towards and away from said base portion (30), said body member (54) being operatively connected to said release means for being operatively released from said follower means (50), said biasing means (52) being connected between said housing means (24) and said body member (54) for applying a biasing force on said body member (54) when said body members (54) is operatively released from said threaded portion (48).

5. An aid device as set forth in claim 4 further characterized by said follower means (50'"'"') including a finger member (78) mounted on said body member (54'"'"') and being moveable into and out of engagement with said threaded portion (48'"'"'), said release means including a lever member (80) operatively connected to said finger member (78) for selectively moving said finger member (78) out of engagement with said threaded portion (48'"'"') whereby said biasing means (52'"'"') forces said body member (54'"'"') to force the plunger (20) into the barrel (14).

6. An aid device as set forth in claim 5 further characterized by said lever member (80) including a handle (82) extending out of said housing means (24'"'"') and a shaft portion connected to said handle and operatively connected to said finger member (78), said shaft portion (84) being pivotally connected to said housing means (24'"'"'), depression of said handle (82) pivoting said shaft portion (84) to move said finger members (78) out of engagement with said threaded portion (48'"'"').

7. An aid device as set forth in claim 4 further characterized by said body member (54) including a first magnet (64) therein and said follower means (50) including a second magnet (74) for magnetically connecting said body member to said follower means (50), said release means including a button member (72) slideably connected to said follower means (50) for selectively moving said second magnet (74) into and out of contact with said first magnet (64) whereby movement out of contact releases said body member (54) from said follower means (50).

8. An aid device as set forth in claim 4 further characterized by said follower means (50") including a first gear member (88) mounted on said body member (54") and having teeth engaging said threaded portion (44") and a first axis of rotation (91) and a second gear member (92) mounted on said body portion (54") and having a toothed radially outer periphery (94) engaging said toothed periphery (90) of said first gear member (82) and a second axis of rotation (95), said second gear member (92) being movable axially along said second axis of rotation (95) into and out of engagement with said first gear member (88) and being rotatable in only a single direction allowing rotation of said screw (44") to move said plunger holder means (25") in relation to said base portion (30") when said first and second gears (88, 92) are engaged, said first gear member (88) being rotatable in either direction about said first axis of rotation (88), said release means including a lever (98) extending out of said housing means (24") and operatively connected to said second gear member (92) for moving said second gear member (92) axially along said second axis of rotation (95) to disengage said second gear member (92) from said first gear member (88) allowing said biasing means (52") to force said body member (54") towards said base portion (30").

9. An aid device as set forth in claim 4 further characterized by including sensor means (104, 106) for sensing information about the amount of rotation and direction of rotation of said screw (44) and translation means for translating said sensed information from said sensor means (104, 106) into digital information communicated to said digital readout means (109).

10. An aid device as set forth in claim 9 further characterized by said sensor means including first optical sensor means (104) disposed adjacent to said vernier screw for optically sensing the amount of rotation of said screw and providing a first output wave signal and second optical sensor means (106) disposed adjacent said screw for sensing direction of rotation of said screw and providing a second output wave signal, said translator means including first and second shaper means (108,110) for shaping the first and second output signals respectively and a counter (112) for quantitating the shaped output waves and decoder/driver means (114) for decoding said quantitated waves for transmission by said digital readout means (108).

11. An aid device as set forth in claim 10 further characterized by said sensor means (100'"'"') being mounted on said base portion (30'"'"') and including a deflectable switch lever (116) extending therefrom, said switch lever (116) being operatively connected to said sensor means (100'"'"') for resetting said digital read out means upon being deflected, said body member (54'"'"') having an under surface (118) which contacts and deflects said switch lever (116) when said body member (54'"'"') is biased and moved completely to said base portion (30'"'"') and released by said releasing means.

12. An aid device as set forth in claim 4 further characterized by said housing means (24) including a cover (26) hingedly connected thereto and having a closed condition wherein said cover (26) is disposed over said chamber (28) for retaining the barrel (14) of the syringe (12) within said chamber (28) and the cap portion (22) within said recessed portion (56) and an open condition exposing said chamber (28) allowing removal of the syringe (12) from said chamber (28).