Fluid sampling method and apparatus

• US 4,602,517 A
• Filed: 02/11/1985
• Issued: 07/29/1986
• Est. Priority Date: 02/11/1985
• Status: Expired due to Fees

• Current Assignee: Hamilton Company
• Original Assignee: Hamilton Company
• Inventors: Schultz, Harold R.
• Primary Examiner(s): Levy, Stewart J.
• Assistant Examiner(s): NOLAND, THOMAS
• Application Number:
  US06/700,285
• Time in Patent Office: 533 Days
• Field of Search: 73/863.32, 73/864.14, 73/864.16, 73/864.17, 73/864.18, 422/100
• US Class Current: 73/864.16
• CPC Class Codes: B01L 3/0234 Repeating pipettes, i.e. for dispensing multiple doses from a single charge
• CPC Class Codes: G01N 1/14 Suction devices, e.g. pumps; Ejector devices

Abstract

This is a method and apparatus for fluid sampling, particularly fluid sampling of like quantities of similar fluids, particularly in small quantities for testing and analysis. The apparatus and the method comprises the sampling and simultaneous sampling of a variety of dissimilar fluids in identical quantitative amounts. The method involves the extraction of samples of the various fluids to be analyzed and the dispensing of such fluid samples by activation of a single control lever wherein the lever can be used to extract in defined quantities by movement to a stop position or wherein the quantity may be selected at infinite quantity measurements.

Claims

1. A fluid extracting and dispensing apparatus comprising in combination:

syringe body carrying means;

syringe body carried by such syringe body carrying means;

syringe piston rod means located within said syringe body and extending a distance outwardly therefrom from a first enlarged end exterior of said syringe body and movable therein;

movable piston rod gripping means gripping said enlarged end of said piston rod and comprising a first plate having slot means suitable to accommodate the piston rod with the enlarged portion resting upon said first plate;

a second plate having a resilient member affixed thereto wherein said first and second plates are held together with the resilient member pressing the enlarged end of said piston rod downward against said first plate exterior of said syringe body;

actuating rod means attached to said piston rod gripping means and slidably mounted in actuating lever means frame attached to the syringe body carrying means;

movable actuating lever means pivotally mounted upon said lever means frame and including spring means limiting the said movable lever means motion in actuating travel and wherein spring means returns said lever means to an original starting position upon release of pressure;

pawl means carried by said lever means, said pawl means being cooperable with said actuating rod means in such manner as to be capable of imparting movement to said actuating rod means in one direction when said lever means is moved; and

tubular extension means attached to a second end of said syringe body.