Patents Assigned to Valco Instruments Company, Inc.
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Publication number: 20240036014Abstract: A rod-style linear actuator for use with a housing associated with an axially-rotatable hollow internally-threaded shaft and a piston-driven device is provided where small, precise movement is necessary. The actuator includes a body, a lead screw engaging the axially-rotatable hollow internally-threaded shaft and terminating in a piston, and an anti-rotation device extending from to the lead screw and engaging one of the body or an opposing second body.Type: ApplicationFiled: October 6, 2022Publication date: February 1, 2024Applicant: Valco Instruments Company, Inc.Inventor: Martin P. Brisbin
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Patent number: 11519888Abstract: Systems for use with liquid chromatography for provision of continuous flow or gradient flow in connection with two pumps providing mobile phase to a valve.Type: GrantFiled: August 25, 2021Date of Patent: December 6, 2022Assignee: Valco Instruments Company, Inc.Inventors: Stanley D. Stearns, Ales Plistil
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Publication number: 20140053627Abstract: A pulsed discharge helium ionization detector for gas chromatography with multiple combined bias/collecting electrodes.Type: ApplicationFiled: August 23, 2012Publication date: February 27, 2014Applicant: Valco Instruments Company, Inc.Inventors: Stanley D. Stearns, Huamin Cai
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Patent number: 6575501Abstract: A deformable bushing to seal tubing to a receiving body is provided. The bushing includes a pair of grooves extending around the bushing with an annular ring between the grooves. The grooves are cut to a depth leaving sufficient wall thickness, and have an inscribed angle of about 90 degrees. An alignment flange may be provided at one end of the bushing to align the axis of the tubing with the axis of the through-hole in the receiving body.Type: GrantFiled: September 11, 2000Date of Patent: June 10, 2003Assignee: Valco Instruments Company, Inc.Inventor: H. Max Loy, Jr.
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Patent number: 6247731Abstract: A tapered conic ferrule in accordance with an industry standard is abutted against a male nut. The nut is provided with a length wise passage having an end at a head on the nut. The passage has a radius of curvature to enable the tube to bend, but not sharply so that the tube is not damaged.Type: GrantFiled: August 4, 1999Date of Patent: June 19, 2001Assignee: Valco Instruments Company, Inc.Inventors: Stanley D. Stearns, Herbert Max Loy, Jr.
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Patent number: 6202698Abstract: This disclosure sets forth a diaphragm valve operative with N ports deployed in an upper head. The ports all connect to a diaphragm having a bead defining a flow path around the diaphragm connecting all the ports. In the cylinder below the upper head, there are upper and lower pistons which are forced apart to define a fluid receiving chamber. The fluid receiving chamber is enlarged on the introduction of fluid above a certain pressure thereby raising half of the piston rods bearing against the diaphragm and reduction of fluid pressure in the chamber lowers those push rods and raises an alternate set of push rods to accomplish diaphragm switching by deformation of the resilient material defining the diaphragm.Type: GrantFiled: June 18, 1997Date of Patent: March 20, 2001Assignee: Valco Instruments Company, Inc.Inventor: Frank A. Stearns
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Patent number: 6193213Abstract: A variable load mechanism for use in a valve seals the flow of a switched fluid. The flow passes through the mechanism in a region which includes shear seal surfaces. The lives of the components of the valve are extended by limiting the range of excursion in response to valve seat forces. The valve element is provided with a first force from a stack of Bellville washers, for example. A second force acts on the valve element through the spring and is determined by fluid pressure.Type: GrantFiled: March 5, 1999Date of Patent: February 27, 2001Assignee: Valco Instruments Company, Inc.Inventors: Stanley D. Stearns, Ales Plistil
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Patent number: 6030436Abstract: This disclosure features a permeation storage chamber in a tube having a first membrane delivering a permeate flow into an intermediate chamber. This chamber delivers flow from a second membrane. The intermediate chamber delivers surplus permeate out through a pressure regulator, or a drain tube. Pressure stabilization at the second membrane enables constant permeation discharge, avoiding pressure or temperature dependent flow rate charges.Type: GrantFiled: September 14, 1998Date of Patent: February 29, 2000Assignee: Valco Instruments Company, Inc.Inventor: L. Harvey Barclay
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Patent number: 4779465Abstract: The present apparatus in the preferred and illustrated embodiment comprises first and second rings which are respectively affixed to the mouthpiece and mouth pipe. As force is increased by the musician in holding the mouthpiece against his lips, such force is measured by cooperative measuring means fixed to said first and second means. In the preferred embodiment, the force measuring means includes an aligned pin on one of said means positioned relative to a transducer coil to thereby provide an indication of force. The signal indicative of force is delivered to a time based recorder and is recorded as a function of time along with additional data including sound intensity levels and frequency of the music to provide correlation between force, intensity and frequency as a function of time. A method is also taught including the recording of such data to teach the musician to reduce the force applied against his lips.Type: GrantFiled: February 9, 1987Date of Patent: October 25, 1988Assignee: Valco Instruments Company, Inc.Inventors: Stanley D. Stearns, John K. McGee