Snap-on vernier syringe
First Claim
1. A syringe assembly comprising:
- a cylinder from which a volume of material can be dispensed;
piston means to be inserted in and moveable through said cylinder for expulsing material therefrom; and
collar means having a hole for receiving said piston means therethrough, said collar means being removably connected to said cylinder to support and align said piston means for movement through said cylinder, said collar means also including;
at least one exterior face;
an interior core spaced from said face;
an access opening formed in said face through which an end of said cylinder may be inserted, said collar means being removably connected to said cylinder when said cylinder is inserted through said access opening and rotated through the space between said exterior face and said interior core;
a catch member;
a seat formed in said interior core into which said catch member may be moved; and
position control means communicating with said catch member and extending through said collar means to a manually accessible position thereof at which to control the movement of said catch member relative to said seat, said position control means being operable to move said catch member either into said seat in said core to permit the rotation of said cylinder end and the connection or disconnection of said collar means to or from said cylinder or out of said seat and into the space between said exterior face said interior core to block the rotation of said cylinder end and prevent the disconnection of said collar means from said cylinder.
1 Assignment
0 Petitions
Accused Products
Abstract
A low cost, easy to use, snap-on, linear-to-vernier syringe by which a volume of material may be controllably and accurately delivered to a recipient. By virtue of the present invention, a piston supporting collar member may be securely snapped into releaseable engagement with a conventional, disposable syringe cylinder to complete the syringe assembly. Moreover, the conventional syringe cylinder is thereby converted into a precisely accurate pipetting cylinder to control the infusion of highly potent, dosage sensitive, radioactive, or expensive drugs, and the like, without requiring any modification to the cylinder. The syringe assembly is particularly adapted to permit rapid switching between freely rotated and incrementally rotated modes of operation, whereby a predetermined volume of material may be selectively imparted from the syringe cylinder, either continuously or in discrete and precisely calibrated increments.
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Citations
14 Claims
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1. A syringe assembly comprising:
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a cylinder from which a volume of material can be dispensed; piston means to be inserted in and moveable through said cylinder for expulsing material therefrom; and collar means having a hole for receiving said piston means therethrough, said collar means being removably connected to said cylinder to support and align said piston means for movement through said cylinder, said collar means also including; at least one exterior face; an interior core spaced from said face; an access opening formed in said face through which an end of said cylinder may be inserted, said collar means being removably connected to said cylinder when said cylinder is inserted through said access opening and rotated through the space between said exterior face and said interior core; a catch member; a seat formed in said interior core into which said catch member may be moved; and position control means communicating with said catch member and extending through said collar means to a manually accessible position thereof at which to control the movement of said catch member relative to said seat, said position control means being operable to move said catch member either into said seat in said core to permit the rotation of said cylinder end and the connection or disconnection of said collar means to or from said cylinder or out of said seat and into the space between said exterior face said interior core to block the rotation of said cylinder end and prevent the disconnection of said collar means from said cylinder. - View Dependent Claims (2)
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4. A syringe assembly having means by which a measured volume of material can be dispensed either freely or in discrete, calibrated steps, said syringe comprising:
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a cylinder from which a volume of material can be removed; piston means to be rotated in and movable axially through said cylinder for dispensing material therefrom, said piston means having a groove extending longitudinally therealong; and means to selectively control the movement of said piston means through said cylinder including a detent tooth movable into and removable from the longitudinally extending groove of said piston means; said piston means being rotated continuously and moved axially through said cylinder to freely dispense material therefrom when said detent tooth is removed from said groove, or said piston means being rotated incrementally and moved axially through said cylinder to dispense material therefrom in discrete steps when said tooth is successively removed from and returned to said groove. - View Dependent Claims (3, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A syringe assembly comprising:
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a cylinder from which a volume of material can be dispensed; piston means to be rotated in and moveable axially through said cylinder for expulsing material therefrom, said piston means having a groove extending longitudinally therealong; collar means having a hole for receiving said piston means therethrough, said collar means also having an access opening through which to receive one end of said cylinder so that said collar means may be removably connected to said cylinder and said piston means may be supported for rotation and axial movement, said collar means further having a catch member which is movable into said access opening to block the disconnection of said cylinder from said collar means, and pin means connected to said catch member and extending through said collar means to a manually accessible piston at which to control the movement of said catch member relative to said access opening; and means movable into and out of said groove in said piston means to selectively control the rotational and axial movement of said piston means through said cylinder, such that a measured volume of material can be dispensed either continuously or in discrete, calibrated increments.
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Specification