Measuring and testing – Measuring vessel
Patent
1978-04-19
1981-01-20
Swisher, S. Clement
Measuring and testing
Measuring vessel
G01N 114
Patent
active
RE0304832
ABSTRACT:
An outer tube has a hollow elongated member, attached to one end of the tube in a coaxial relationship. A rod slidable in the tube causes a replaceable tip, mounted on the hollow elongated member, to fill with fluid when the rod is moved in a first direction and discharges the fluid when the rod is moved in the opposite direction. A first spring surrounds the rod and exerts a force between a stop, mounted at an intermediate position within the tube, and the rod to bias the rod in the first direction. A second spring surrounds the rod and is interposed between the stop and the inner end of the hollow elongated member. A first limiting member is mounted on the rod to compress the second spring when the rod is moved in the opposite direction beyond a predetermined limit.
REFERENCES:
patent: 2530909 (1950-11-01), Riggs
patent: 2959964 (1960-11-01), Streitfeld
patent: 3244009 (1966-04-01), Tietje
patent: 3302462 (1967-02-01), Pursell
patent: 3343539 (1967-09-01), Moorhouse
patent: 3494201 (1970-02-01), Roach
Jerg Louis
Seitz Lamont J.
Baxter Travenol Laboratories Inc.
Flattery Paul C.
Flynn Lawrence W.
Hensley Max D.
Swisher S. Clement
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