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Publication numberUS3286506 A
Publication typeGrant
Publication dateNov 22, 1966
Filing dateMay 20, 1964
Priority dateMay 20, 1964
Publication numberUS 3286506 A, US 3286506A, US-A-3286506, US3286506 A, US3286506A
InventorsRichard L Lloyd
Original AssigneeRichard L Lloyd
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sampling pump
US 3286506 A
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Description  (OCR text may contain errors)

Nov. 22, 1966 R. LLOYD SAMPLING PUMP Filed May 2o, 1964 INVENTOR.

ATTORNEYS we E623 wr ,EMS om k Q mm 32E O m 4 kumlu UnitedStates Patent O 3,286,506 SAMPLING PUMP Richard L. Lloyd, Salt Lalke City, Utah, assignor to the United States of America as represented by the Secretary of the Army Filed May 20, 1964, Ser. No. 369,046 1 Claim. (Cl. 73--23) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

The present invention relates to a pump to take a sample of air or other gas and test it to determine how much of a certain contaminant it contains. The sampling pump is of l-ow-cost construction and simple to operate for quick on-the-spot testing.

In the drawings:

FIG. l is a side view of the pump with parts in cross section.

FIG. 2 is a view of the hollow piston rod.

FIG. 3 is a View of the hollow piston rod taken at right angles to the view of FIG. 2; and

FIG. 4 is a view of the glass tube containing an indicating compound and adapted to be inserted in the hollow piston rod.

Sampling pump casing has a plunger 12 mounted on plunger rod 14 for manual reciprocation by the hand piece 16. The pump is closed at one end by cap 18 with a vent hole 20 therein. The pump is closed at the other end by cap 22 having a tube connector 24 and check valve 26 therein. Plunger 12 has sealing O rings 28 and check valve 30 mounted thereon. Plunger rod 14 has a resilient seat 32 and a stop member 34 mounted therein to limit movement of glass tube 36. The glass tube is calibrated along its length with visible indicia 37 and is further secured against movement in the opposite direction by threaded screw 38 and wing nut 40 which may be adjusted to press tube 36 gently against resilient seat 32.

Plunger rod 14 has a slot 42 and an oval shaped hole 44 through which glass tube 36 with its indicating compound 46 may be viewed. The compound 46 may be secured in glass tube 36 by any means desired. Exhaust hole 48 is drilled near the end of plunger rod 14.

OPERATION The sampling pump is preferably transported to the site where it is to be used with the glass tube cartridge 36 removed from the pump casing 10 and sealed against contamination of the indicating compound 46. At the site where the air is to be tested the plunger is reciprocated repeatedly to draw in the air to be sampled at 24 and to exhaust the air through exhaust hole 48 (and slot 42). When the pump is fully charged with air to be sampled, with the plunger 12 pulled all of the way toward cap 18, the calibrated glass tube 36 with indicating cornpound 46 is inserted in plunger rod 14. Hand piece 16 is attached to rod 14 and screw 38 is adjusted to prevent end movement of tube 36. Plunger 12 is then pushed to its limit toward cap 22. With this movement, the predetermined volume of sample air in pump casing 10 ahead of plunger 12 is forced thru check valve 30 into plunger rod 14, thru glass tube 36 and indicating compound 46 and out thru exhaust hole 48. Plunger rod 14 may then be pulled back. The extent of discoloration or other change in compound 46 may then be observed thru viewing slot 42 and hole 44. With the aid of calibrations 37 on the side of glass tube 36 the operator may determine the relative amount of contaminating or other types of impurities in the air.

I claim:

A pump for testing a sample of a gas comprising:

a pump casing;

a plunger reciprocably mounted in the casing;

a hollow plunger rod having a cut-.away area attached to the plunger and reciprocably mounted in the casing;

a glass tube with graduated indicia thereon viewable through said cut-away area and mounted in the hollow plunger rod;

a removable closure for the plunger rod that may be removed so that the glass tube may be inserted in the plunger;

a color-changeable indicating compound in the glass tube;

a valve means for the pump operative to admit a sarnple of air to be tested to the pump as the plunger is reciprocated in one direction;

and valve means for the plunger to admit the sample to the glass tube and the indicating compound as the plunger is reciprocated in a second direction to change the color of the compound in accordance with the characteristics of the air sample.

References Cited bythe Examiner UNITED STATES PATENTS JAMES I. GILL, Acting Primary Examiner. RICHARD C. QUEISSER, Examiner. J. FISHER, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1390488 *Apr 6, 1920Sep 13, 1921Raymond Boulton PercivalAbsorption apparatus for analyzing gases
US1767301 *May 22, 1928Jun 24, 1930Standard Oil Dev CoTank sampler
US2234499 *Sep 12, 1939Mar 11, 1941Mine Safety Appliances CoAir testing device
US2631088 *Apr 22, 1947Mar 10, 1953Guild Lloyd VApparatus for making gas analyses
US3196689 *Apr 18, 1963Jul 27, 1965Macquorn R ForresterBreath constituent measurement apparatus and method
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3388975 *Jun 16, 1964Jun 18, 1968Barber Mfg CompanyApparatus for colorimetric gas analysis and method for making same
US3982897 *Feb 19, 1976Sep 28, 1976Israel Herbert ScheinbergFilter and detector and methods of using same in the removal and detection of carbon monoxide from, and in, a gas stream
US4079622 *Sep 10, 1976Mar 21, 1978Snamprogetti S.P.A.Apparatus for determining the smoke density of flue gases of gas and fuel oil
US4276048 *Jun 14, 1979Jun 30, 1981Dynatech AgMiniature reaction container and a method and apparatus for introducing micro volumes of liquid to such a container
US4315890 *May 1, 1980Feb 16, 1982Intersci CorporationDetectors and spectrophotometric analyzers
US4848166 *May 26, 1988Jul 18, 1989Draegerwerk AgWearable air sampling device
US5571948 *May 22, 1995Nov 5, 1996Lawrence Factor, Inc.Pressurized air tank air quality tester
DE2451043A1 *Oct 26, 1974Apr 29, 1976Dockhorn Ecs Messtechnik WVorrichtung zur entnahme einer fluessigkeitsprobe und zur trennung der darin enthaltenen bestandteile, insbesondere zur entgasung der jeweils entnommenen probe
EP0006581A1 *Jun 21, 1979Jan 9, 1980Riedel-De Haen AktiengesellschaftApparatus for sampling a liquid without contamination from a tank
Classifications
U.S. Classification73/31.5, 422/86, 422/547
International ClassificationG01N1/14
Cooperative ClassificationG01N1/14
European ClassificationG01N1/14