Manually evacuated suction tube

Details Manually evacuated suction tube Manually evacuated suction tube

1987-11-09

1990-01-02

Truluck, Dalton L.

Surgery

Truss

Pad

604146, A61B 514

Patent

active

048906271

ABSTRACT:
A cylindrical, shatter-resistant, pre-sterilized suction tube in which a vacuum is to be selectively established by the user for automatically drawing a fluid sample, such as blood, or the like, by way of a hypodermic needle. The suction tube has a seal member detachably connected across a distal end thereof and a tab member detachably connected across a proximal end. A piston is located at the interior of the tube between the seal and tab members. An elongated retracting element extends between the detachable tab member and the piston. Application by the user of an axial pulling force to the tab member after the tab member has been detached from the proximal end of the suction tube causes a corresponding axial movement of the piston towards the open proximal end of the tube for expulsing air therefrom to evacuate the tube. The piston is locked at the proximal end to completely seal the tube and preserve the integrity of the vacuum which has been established therewithin.

REFERENCES:
patent: 2688325 (1954-09-01), Lockhart
patent: 3577980 (1971-05-01), Cohen
patent: 3645253 (1972-02-01), Goverde et al.
patent: 3937211 (1976-02-01), Merten
patent: 4057050 (1977-11-01), Sarstedt
patent: 4370987 (1983-02-01), Bazell et al.
patent: 4766908 (1988-08-01), Clement

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