Canteen carried water purifier system

Claim 1

In a canteen including a hollow, watertight container having a neck at its upper end, and cap means detachably mounted on said neck; the improvement comprising: an elongate, tubular purifier assembly inserted into said container through said neck and a lip projecting radially outwardly from said assembly at its upper end and resting upon the top of said neck and sealingly clampable against said neck by said cap means when said cap means is mounted on said neck, said assembly having means defining an internal chamber having a top and bottom and substantially filled with particles of a water purifying material; fluid inlet means at the lower end of said assembly for establishing fluid communication between said chamber and the interior of said container; means at the upper end of said assembly defining a fluid outlet means from said chamber; means defining a restricted flow passage in said chamber directing the flow of fluid through said chamber from said inlet means to said outlet means including a first tube located within said chamber extending upwardly from the bottom of said chamber and having an open upper end adjacent to and spaced below the top of said chamber, a second tube projecting downwardly from the top of said chamber into said first tube and having an open lower end located adjacent to and spaced above the bottom of said first tube, and passage means at the upper end of said second tube placing the interior of said second tube in fluid communication with said outlet means to define a fluid passage of a length substantially greater than the length of said chamber; manually operable pump means in said assembly for pumping fluid in said container through said chamber to said outlet, said pump means comprising means defining a pump chamber in said assembly adjacent the upper end of said assembly, said pump chamber having means defining an outlet opening into the upper portion of the interior of said container when said lip is seated on said neck, and piston means manually reciprocable in said pump chamber for pumping air from said pump chamber into the interior of said chamber; and filter means mounted in the flow passage of said assembly for filtering fluid flowing into said chamber via said inlet means.