Patents by Inventor John D. Hull
John D. Hull has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6790674Abstract: To sample hot liquids containing volatile materials, the liquid is cooled in a refrigerator and pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liquid flows upwardly continuously as the needle is withdrawn through an opening. The cap for the container includes a closure having a valve opening extending upwardly and sized to narrowly receive the syringe needle in a perpendicular valve member opening. The valve member includes a flat member on one end adapted to be gripped by a cam follower for opening and closing of the valve opening in coordination with the movement of the syringe needle.Type: GrantFiled: June 15, 2001Date of Patent: September 14, 2004Assignee: Isco, Inc.Inventors: Paul George Wright, Lowell Robert Nickolaus, Paul Thees Busboom, Jerome John Kazakevicius, John D. Hull, Ralph E. Setter, Larry Lee Fritz, Frederick Detlef Sueverkruepp, III, Jack William Foley
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Patent number: 6494331Abstract: To sample liquids containing volatile materials, the liquid is pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liquid flows upwardly continuously as the needle is withdrawn through an opening. The cap for the container includes a closure having a valve opening extending upwardly and sized to narrowly receive a syringe in a perpendicular valve member opening. The valve member includes a flat member on one end adapted to be gripped by a cam follower for opening and closing of the valve opening in coordination with the movement of the syringe.Type: GrantFiled: May 15, 2000Date of Patent: December 17, 2002Assignee: Isco, Inc.Inventors: Paul George Wright, Lowell Robert Nickolaus, Paul Thees Busboom, Jerome John Kazakevicius, John D. Hull, Ralph E. Setter
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Patent number: 6481740Abstract: A socket assembly for a trailer hitch includes a ball clamp member which has lateral arms or wings that limit the pivotal movement of the ball clamp member thereby improving the opportunity for the ball to properly fit in and totally seat within the cavity defined within the socket assembly.Type: GrantFiled: October 12, 2001Date of Patent: November 19, 2002Assignee: Dutton-Lainson CompanyInventors: Reinhold A. Haase, John D. Hull, James M. Gruidel, Lynn D. Alber, Todd James Yost, Thomas G. Johnson
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Publication number: 20020025255Abstract: To sample hot liquids containing volatile materials, the liquid is cooled in a refrigerator and pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liquid flows upwardly continuously as the needle is withdrawn through an opening. The cap for the container includes a closure having a valve opening extending upwardly and sized to narrowly receive the syringe needle in a perpendicular valve member opening. The valve member includes a flat member on one end adapted to be gripped by a cam follower for opening and closing of the valve opening in coordination with the movement of the syringe needle.Type: ApplicationFiled: June 15, 2001Publication date: February 28, 2002Applicant: ISCO, INC.Inventors: Paul George Wright, Lowell Robert Nickolaus, Paul Thees Busboom, Jerome John Kazakevicius, John D. Hull, Ralph E. Setter, Larry Lee Fritz, Frederick Detlef Sueverkruepp, Jack William Foley
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Patent number: 6263747Abstract: To insert an instrument into a flow stream of a sewer pipe from the street, the instrument is fastened to a holder, which in turn is fastened to a portion of an expansion ring opposite its two opened edges. A cord is fastened to one of the edges of the expansion ring and passes over a curved post mounted to the other edge of the expansion ring and extended upwardly in a direction parallel to the edges of the expansion ring so that it can be pulled to compress the expansion ring to a small diameter cylinder and released to expand it against the wall of a pipe. A post is mounted to the expansion ring to permit a long tool to grip the post and move the expansion ring into a sewer pipe where it is expanded and released.Type: GrantFiled: July 14, 1995Date of Patent: July 24, 2001Assignee: Isco, Inc.Inventors: Douglas Timothy Carson, Paul George Wright, John D. Hull
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Patent number: 6152189Abstract: To sample liquids containing volatile materials, the liquid is pumped through a syringe needle into a container until the container overflows. The needle is removed slowly and the container is automatically closed as the needle is withdrawn, wherein liquid flows upwardly continuously as the needle is withdrawn through an opening. The cap for the container includes a closure having a valve opening extending upwardly and sized to narrowly receive a syringe in a perpendicular valve member opening. The valve member includes a flat member on one end adapted to be gripped by a cam follower for opening and closing of the valve opening in coordination with the movement of the syringe.Type: GrantFiled: March 30, 1993Date of Patent: November 28, 2000Assignee: Isco, Inc.Inventors: Paul George Wright, Lowell Robert Nickolaus, Paul Thees Busboom, Jerome John Kazakevicius, John D. Hull, Ralph E. Setter
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Patent number: 6116580Abstract: A mechanical winch includes a ratchet lever having a single pawl which may be positioned in either one of two orientations in order to preclude clockwise or counterclockwise movement of the winch, drum or reel. In each orientation, the ratchet lever may also be positioned in a free wheeling position for the drum.Type: GrantFiled: July 13, 1999Date of Patent: September 12, 2000Assignee: Dutton-Lainson CompanyInventor: John D. Hull
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Patent number: 5996427Abstract: A liquid sample storage device which utilizes a liner-holder with a liner which may be disposed of after use, thereby eliminating contamination problems associated with reusable bottles. The liner-holder is a hollow, wedge shaped container with an upwardly extending neck section and vents on the top and bottom, as well as a plurality of vents on each of its sides, to allow adequate displacement of air from within the container as the liner fills with the liquid sample. Two embodiments utilize a liner-holder which may be opened into two sections along a vertical hinge to provide access to the interior for proper positioning and later removal of the liner. The liner is positioned within the liner-holder, secured at the neck, and then suspended within the liner-holder by snap-locks or a support hook to facilitate the input of the sample into the liner.Type: GrantFiled: July 31, 1998Date of Patent: December 7, 1999Assignee: ISCO, Inc.Inventors: James P. Masek, John D. Hull, Robert L. Haahr
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Patent number: 5789684Abstract: A liquid sample storage device which utilizes a liner-holder with a liner which may be disposed of after use, thereby eliminating contamination problems associated with reusable bottles. The liner-holder is a hollow, wedge shaped container with an upwardly extending neck section and vents on the top and bottom, as well as a plurality of vents on each of its sides, to allow adequate displacement of air from within the container as the liner fills with the liquid sample. Two embodiments utilize a liner-holder which may be opened into two sections along a vertical hinge to provide access to the interior for proper positioning and later removal of the liner. The liner is positioned within the liner-holder, secured at the neck, and then suspended within the liner-holder by snap-locks or a support hook to facilitate the input of the sample into the liner.Type: GrantFiled: January 6, 1997Date of Patent: August 4, 1998Assignee: ISCO, Inc.Inventors: James P. Masek, John D. Hull, Robert L. Haahr
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Patent number: 4673334Abstract: To increase precision of flow in multiple channels of a peristaltic pump, a plurality of spring biased cassettes are mounted to cooperate with a spool having a plurality of elongated rollers which orbit about its center so that each elongated roller in succession compresses a plurality of flexible tubes in the channels against corresponding cam surfaces in the cassettes, spaced from the rollers by surfaces of the cassettes which are in contact with the rolles. In each cassette, the cam is mounted between side plates against which the rollers roll, which are spring biased against the rollers and hinged at a center location to provide precision determined only by the precision of the cam to side plate edge dimension. The cam is shaped to reduce pulses during roller lift-off from the cam surface to provide for pulse-free flow.Type: GrantFiled: February 3, 1986Date of Patent: June 16, 1987Assignee: Isco, Inc.Inventors: Robert W. Allington, John D. Hull