Syringe and syringe barrel
AssigneeDaikyo Seiko, Ltd.
InventorsMasaya Araki, Hideaki Kawamura
Life of this patent
Estimating the term…
Abstract
To provide a syringe barrel and a syringe capable of allowing an operator to feel the amount of injected medical solution or the inserting distance of a piston by a difference in sliding resistance when an injection operation is performed. A syringe 1 includes a syringe barrel 11 which has an inner surface provided with a structure in which a sliding resistance F is changed step by step upon sliding a piston 32. The syringe barrel 11 includes steps which are formed at one or two or more positions of the inner surface in the axial direction so as to face from the rear end to the front end or from the front end to the rear end, and which include edges formed along the circumferential direction.
Claims9
A syringe comprising:
- a syringe barrel which includes an inner surface provided with a structure in which a sliding resistance is changed step by step upon sliding a piston.
A syringe barrel comprising:
- steps which are formed at one or two or more positions of an inner surface of the syringe barrel so as to uprightly formed from the rear end to the front end or from the front end to the rear end in the axial direction, and include edges along the circumferential direction.
A syringe barrel comprising:
- concave portions or convex portions which are formed in the circumferential direction at one or two or more positions of an inner surface of the syringe barrel in the axial direction.
Dependencies are inferred from the claim text.