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Publication Number
US-12076528-B2
Publication Date
2024-09-03
Expiration Date
Abstract
An injection system has: a gasket having a plurality of engaging claws, wherein each of the engaging claws includes an inner surface S1 which defines a hole H having an inlet with an enlarged diameter and an outer surface S2 inclined in a direction away from a perpendicular line P passing through a center of the hole H, and the engaging claws are to be displaced between a widened position and a narrowed position; a rain to be inserted into the hole H so as to engage with the engaging claws; a cylinder, into which the gasket is to be inserted, contacting the outer surfaces S2; and an injection device configured to move the ram forward and injecting a chemical solution in the cylinder. An annular groove which serves as a starting point of deformation of the engaging claws is formed on the gasket.
Core Innovation
The disclosure relates to an injection system comprising a gasket with a plurality of engaging claws. Each engaging claw includes an inner surface that defines a hole having an inlet with an enlarged diameter and an outer surface, and the engaging claws are displaced between a widened position and a narrowed position. A ram is inserted into the hole to engage with the engaging claws, and a cylinder contacts the outer surfaces of the engaging claws of the inserted gasket.
A groove serves as a starting point of deformation of the engaging claws and is formed on the gasket. The inner surface includes a first inner surface extending along a perpendicular line perpendicular to a radial direction of the gasket and a second inner surface inclined away from the perpendicular line, and the groove is formed at a position corresponding to a boundary portion between the first inner surface and the second inner surface.
The disclosure addresses problems in prior gasket-ram groove coupling, including gaps, rattling, abnormal sounds, and misalignment under injection pressure, and it seeks improved coupling and sealing with a compact injection head. By configuring the deformation-starting groove and the specific inner and outer surface geometries, the engaging claws are driven without ram inclination and rattling.
Claims Coverage
Independent claims are present in claim 1, claim 9, claim 10, and claim 11. Collectively, they cover an injection system and syringe/gasket structures using engaging claws with a deformation-starting groove positioned at a boundary between a perpendicular first inner surface and an inclined second inner surface; additional independent coverage includes an O-ring fitted into a groove on the engaging claw.
Deformation-starting groove at boundary between perpendicular and inclined inner surfaces
An injection system comprising a gasket with engaging claws defining a hole with an inlet having an enlarged diameter, the engaging claws displaced between a widened position and a narrowed position; a ram inserted into the hole to engage the engaging claws; a cylinder contacting the outer surfaces of the engaging claws; and an injection device moving the ram forward to inject a chemical solution, wherein a groove serves as a starting point of deformation of the engaging claws, the inner surface includes a first inner surface extending along a perpendicular line perpendicular to a radial direction and a second inner surface inclined away from the perpendicular line, and the groove is formed at a position corresponding to a boundary portion between the first inner surface and the second inner surface.
O-ring fitted into groove on engaging claw with deformation-starting groove
An injection system comprising a gasket having a plurality of engaging claws with inner surfaces defining a hole having an inlet with an enlarged diameter, the engaging claws displaced between a widened position and a narrowed position; a ram inserted into the hole to engage the engaging claws; a cylinder into which the gasket is inserted contacting outer surfaces of the engaging claws; and an injection device moving the ram forward to inject a chemical solution in the cylinder, wherein a groove serves as a starting point of deformation of the engaging claws is formed on the gasket, and the gasket has an O-ring fitted into a groove formed on the engaging claw.
Syringe with engaging-claw gasket and boundary-defined deformation-starting groove
A syringe comprising a gasket having a plurality of engaging claws defining a hole with an inlet having an enlarged diameter and an outer surface, the engaging claws displaced between a widened position and a narrowed position; and a cylinder contacting the outer surfaces of the engaging claws of the inserted gasket, wherein a groove serves as a starting point of deformation of the engaging claws on the gasket, the inner surface includes a first inner surface extending along a perpendicular line perpendicular to a radial direction of the gasket and a second inner surface inclined away from the perpendicular line, and the groove is formed at a position corresponding to a boundary portion between the first inner surface and the second inner surface.
Gasket with engaging claws and deformation-starting groove at boundary between perpendicular and inclined inner surfaces
A gasket comprising a plurality of engaging claws, each engaging claw including an inner surface defining a hole having an inlet with an enlarged diameter and an outer surface, the engaging claws displaced between a widened position and a narrowed position, wherein a groove serves as a starting point of deformation of the engaging claws formed on the gasket, the inner surface includes a first inner surface extending along a perpendicular line perpendicular to a radial direction of the gasket and a second inner surface inclined away from the perpendicular line, and the groove is formed at a position corresponding to a boundary portion between the first inner surface and the second inner surface.
Across the independent claims, the main inventive coverage centers on a gasket with engaging claws whose deformation is initiated by a groove formed at a boundary portion between a first inner surface defined relative to a perpendicular line and a second inner surface inclined away from that perpendicular line, with the engaging claws being displaceable between widened and narrowed positions during ram insertion in an injection system or syringe. An additional independent feature specifies an O-ring fitted into a groove formed on the engaging claw.
Stated Advantages
Suppressing ram inclination and rattling.
Improving coupling/sealing during injection.
Allowing a compact injection head.
Documented Applications
No documented applications found
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