Syringe
First Claim
1. A syringe comprising:
- a container having a center line, a piston end, and a needle end;
a rod which can be moved reciprocatingly within the container;
a piston which coacts with the rod, andcoupling means for connecting and disconnecting the piston to and from the rod,said coupling means assumes a connected state when the piston is drawn by the rod from a position proximate to the needle end toward the piston end, and the coupling means is brought to a disconnected state when the piston is pressed by the rod towards the needle end,said coupling means includes surfaces on a part of the rod which is proximal to the needle end and includes opposing and coacting surfaces on the piston,a first one of the surfaces located on the piston is inclined at an inclination to an extent such as to cause the piston to rotate about the center line as the rod moves towards the needle end.
4 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a syringe (1) which comprises a rod (5) mounted for reciprocating movement in relation to a container (8), wherein one end of the rod has the form of a needle (3) or is able to coact with a needle. The syringe further comprises a piston (4) and coupling member (6) which connect and disconnect the piston to and from the rod. The coupling member assumes a connecting state when the piston is drawn by the rod from a position proximate to the needle to a position in which it is distanced therefrom, and are brought to a disconnecting or disconnected state when the piston is pressed by the rod towards the needle. The coupling member comprises support and/or slide surfaces (5k'"'"', 5k) arranged on that part of the rod which is proximal to the needle, and opposing support and/or slide surfaces (4k'"'"', 4k) on the piston. The first support and/or slide surfaces (4k'"'"') provided on the piston and located nearest the needle (3) are inclined (c) to an extent such that as the rod (5) moves towards the needle (3), the piston (4) is rotated about a container center line, among others.
38 Citations
11 Claims
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1. A syringe comprising:
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a container having a center line, a piston end, and a needle end; a rod which can be moved reciprocatingly within the container; a piston which coacts with the rod, and coupling means for connecting and disconnecting the piston to and from the rod, said coupling means assumes a connected state when the piston is drawn by the rod from a position proximate to the needle end toward the piston end, and the coupling means is brought to a disconnected state when the piston is pressed by the rod towards the needle end, said coupling means includes surfaces on a part of the rod which is proximal to the needle end and includes opposing and coacting surfaces on the piston, a first one of the surfaces located on the piston is inclined at an inclination to an extent such as to cause the piston to rotate about the center line as the rod moves towards the needle end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification