Ratchet connector for hypodermic syringe pistons

Details Ratchet connector for hypodermic syringe pistons Ratchet connector for hypodermic syringe pistons

1988-08-08

1990-06-05

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604218, A61M 500

Patent

active

049310437

ABSTRACT:
A connector for attachment of a plunger to a rubber piston in hypodermic syringe cartridge ampoules comprises a pin having a shank portion with a contiguous screw-threaded post portion and a ratchet head portion sized to rotatably fit within a cavity in said piston which thus prevents overtightening the plunger to the piston thereby obviating jamming of the piston in the bore of the cartridge.

REFERENCES:
patent: 1395592 (1921-11-01), Odom
patent: 2524367 (1950-10-01), Smith
patent: 3224445 (1965-12-01), Melott
patent: 3253625 (1966-05-01), Oestereicher
patent: 3259130 (1966-07-01), Krauthamer
patent: 3273443 (1966-09-01), Rubin
patent: 3555491 (1971-01-01), Moss
patent: 3584667 (1971-06-01), Reiland
patent: 4125051 (1978-11-01), Herkes et al.
patent: 4293256 (1981-10-01), Pamer
patent: 4759750 (1988-07-01), DeVries et al.

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