Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1987-03-12
1989-03-07
Scott, Samuel
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604211, 604224, 604194, 222 46, 222390, A61M 5315
Patent
active
048102490
ABSTRACT:
A syringe assembly having a cylinder adapted to receive a hypodermic needle at one end thereof and a piston reciprocably movably disposed in the cylinder. The exterior of the piston is at least partially threaded and it includes a longitudinal, exterior groove extending over the length of the thread. The cylinder includes a piston thread engaging section which is integrally constructed, e.g. molded with the cylinder, and hingeable relative to the cylinder so that the thread engaging section can be moved through a cutout in the cylinder into engagement with the piston thread. The cylinder has an integrally constructed collar at its open end and forms a detent that can be resiliently biased against the piston so that upon rotation of the piston about its axis the detent engages the longitudinal groove and thereby generates a signal each time the detent engages the groove, i.e. each time the piston is rotated through a predetermined arc and dispenses a predetermined, measured amount of liquid. An end of the piston has a cavity which receives the needle and frictionally retains it in the cavity during storage and shipment of the syringe assembly. The syringe assembly can be conventionally operated, by linearly reciprocating it, when the thread engaging section disengaged from the piston thread, and by rotating the piston about its axis, when the thread engaging section is in engagement with the piston thread.
REFERENCES:
patent: 949163 (1910-02-01), Stapley
patent: 2283915 (1942-05-01), Cole
patent: 2578394 (1951-12-01), Blackman
patent: 3107785 (1963-10-01), Roehr
patent: 3353718 (1967-11-01), McLay
patent: 4067333 (1978-01-01), Reinhardt et al.
patent: 4189065 (1980-02-01), Herold
patent: 4583974 (1986-04-01), Kokernak
Foster Clark B.
Haber Terry M.
Flanigan Allen J.
Habley Medical Technology Corp.
Scott Samuel
LandOfFree
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