Christopher L Keith

US Patent:

58949569, Apr 20, 1999

Filed:

Feb 13, 1997

Appl. No.:

8/800272

Inventors:

Christopher A. Keith - San Lorenzo CA

International Classification:

B67B 700

US Classification:

222 91

Abstract:

A disposable replacement tip for caulking tubes includes a conical first end portion tapered acutely to a distal sharpened point. The exterior of the first end portion is provided with threads, and an intake port adjacent to the sharp point extends diametrically through the tubular member. Joined to the wide end of the first end portion is a generally cylindrical, tubular central portion. A second end portion extends from the central portion in opposition to the first end portion, both end portions being aligned along a common axis. The second end portion comprises another conical tubular member tapered acutely to an open end. A continuous flow space extends from the intake port, through the interiors of the first end portion, the central portion, and the second end portion to the open end thereof. The sharpened point of the first end portion may be driven into the end opening of a caulking tube, or through the sidewall of the tube, and the device is rotated manually. The external threads of the first end portion are self-tapping and self sealing, so that the first end portion is urged proximally, piercing the blockage at the distal end opening and translating the intake port into the caulking tube to access the unsolidified, flowable material therein.

US Patent:

20160038880, Feb 11, 2016

Filed:

Mar 14, 2014

Appl. No.:

14/777406

Inventors:

- Hayward CA, US
Christopher Keith - Alameda CA, US
Carl Lundin - Honolulu HI, US

International Classification:

B01D 61/58
B01D 61/12
B01D 61/06
B01D 61/00
B01D 61/02

Abstract:

An example water purification system includes a forward osmosis module, a reverse osmosis module, a pump powered by an electric motor, and a pressure sensor. The forward osmosis module may receive a feed stream and a draw stream, and may produce an intermediate product stream. The intermediate product stream may be pressurized by a pump and provided to the reverse osmosis module. The reverse osmosis module may generate a product stream and return the draw stream to the forward osmosis module. The pressure sensor may monitor the pressure of the intermediate product stream, and the pressure may be used to determine the speed of the electric motor.