Patents by Inventor Carl L. Shackelford
Carl L. Shackelford 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: 4861473Abstract: A liquid chromatography column apparatus which utilizes sorbent packing material in a tube having a first end portion and a second end portion. The first end portion of the tube includes a plug having a passage therethrough. The plug fits in the tube adjacent the packing material and is movable within the tube. An end fitting is also employed adjacent the plug. The end fitting has a passage therethrough which communicates with the passage of the plug. A seal is used inside the tube between the tube and the end fitting. The second end portion of the tube is enclosed and also includes a passage from the interior to the exterior of the tube. A manually actuable gear mechanism is incorporated in the end fitting of the first end portion of the tube for facilitating application of axial force to the packing material, thereby compressing the packing material so as to eliminate voids and channels in the packing material. Other features are also disclosed.Type: GrantFiled: September 8, 1988Date of Patent: August 29, 1989Assignee: Rainin Instrument Co., Inc.Inventors: Carl L. Shackelford, Kenneth Rainin
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Patent number: 4670141Abstract: A liquid chromatography column apparatus which utilizes sorbent packing material in a tube having a first end portion and a second end portion. The first end portion of the tube includes a plug having a passage therethrough. The plug fits in the tube adjacent the packing material and is movable within the tube. An end fitting is also employed adjacent the plug. The end fitting has a passage therethrough which communicates with the passage of the plug. A seal is used inside the tube between the tube and the end fitting. The second end portion of the tube is enclosed and also includes a passage from the interior to the exterior of the tube. A manually actuable gear mechanism is incorporated in the end fitting of the first end portion of the tube for facilitating application of axial force to the packing material, thereby compressing the packing material so as to eliminate voids and channels in the packing material. Other features are also disclosed.Type: GrantFiled: June 7, 1985Date of Patent: June 2, 1987Assignee: Rainin Instrument Co., Inc.Inventors: Carl L. Shackelford, Kenneth Rainin
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Patent number: 4655917Abstract: A chromatography column apparatus which utilizes sorbant material in a tube which has a first and second end portion. The first end portion of the tube includes a plug having a passage through the same. The plug fits in the same, adjacent the sorbant material, and is movable within the tube. An end fitting is also employed which has a portion that is placed within the tube adjacent the plug. The end fitting has a passage therethrough which communicates with the passage of the plug. A seal is used inside the tube between the plug and the end fitting. The end fitting and plug are held together. The second end portion of the tube is enclosed and also includes a passage from the interior to the exterior of the tube.Type: GrantFiled: August 19, 1985Date of Patent: April 7, 1987Assignee: Rainin Instrument Co.Inventors: Carl L. Shackelford, Kenneth Rainin
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Patent number: 4567780Abstract: A hand-held manually operated pipette having an adjustable plunger stroke and calibrated electronic digital volumetric display draws-up and dispenses viscous, dense or high vapor pressure liquids by means of an easily replaced, disposable, integral, positive displacement type plunger tip and capillary assembly. The pipette in another form utilizes a disposable air displacement capillary. The plunger adjustably strokes to a first stop in a first mode for calibration or sample draw-up and dispensing with the volume of pipette liquid contents continuously displayed. In a second mode an over-travel arrangement enables the plunger shaft to stroke beyond the first stop to permit collet type attachment and ejection of the integral plunger tip and capillary for positive displacement service or to eject an air displacement capillary.Type: GrantFiled: March 12, 1984Date of Patent: February 4, 1986Assignee: American Hospital Supply CorporationInventors: Jon E. Oppenlander, Bruce R. Koball, Carl L. Shackelford, Benn Karne
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Patent number: 4551249Abstract: A chromatography column apparatus which utilizes sorbant material in a tube which has a first and second end portion. The first end portion of the tube includes a plug having a passage through the same. The plug fits in the same, adjacent the sorbant material, and is movable within the tube. An end fitting is also employed which has a portion that is placed within the tube adjacent the plug. The end fitting has a passage therethrough which communicates with the passage of the plug. A seal is used inside the tube between the plug and the end fitting. The end fitting and plug are held together. The second end portion of the tube is enclosed and also includes a passage from the interior to the exterior of the tube.Type: GrantFiled: February 29, 1984Date of Patent: November 5, 1985Assignee: Rainin Instrument Co. Inc.Inventors: Carl L. Shackelford, Kenneth Rainin
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Patent number: 4470431Abstract: A syringe valve and clamping mechanism for an automated liquid dispenser using a demountable precision metering syringe for automatically dispensing reagents or diluting samples with reagent.Type: GrantFiled: February 23, 1982Date of Patent: September 11, 1984Assignee: American Hospital Supply CorporationInventors: Carl L. Shackelford, John F. Eckert
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Patent number: 4243071Abstract: A sample injection valve using a member having four ports as a fluid system inlet, a sample injection inlet, a fluid system outlet, and a vent. The valve also uses a fluid sample reservoir and includes a controller for simultaneously connecting the fluid system inlet and outlet and interposing the fluid reservoir between the sample injection inlet and the vent. A switch changes the position of the fluid reservoir to one of interposition between the fluid system inlet and the fluid system outlet.Type: GrantFiled: August 23, 1978Date of Patent: January 6, 1981Assignee: Altex Scientific, Inc.Inventor: Carl L. Shackelford
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Patent number: 4240429Abstract: A needle injection device for delivering fluid through an opening in a body utilizing a pair of bushings placed substantially in end-to-end orientation. A filter is placed adjacent one of the bushings generally within the opening. The bushing nearest the filter is constructed of sealing material such that forcing of the first bushing against the second bushing seals the area between the needle and the sides of the opening immediately above the filter.Type: GrantFiled: June 14, 1979Date of Patent: December 23, 1980Assignee: Altex Scientific, Inc.Inventor: Carl L. Shackelford
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Patent number: 4205767Abstract: An injection device for use with a fluid transporting cannula and a female fitting for a liquid system. The cannula is surrounded by a first sleeve which in itself is surrounded by a second sleeve. The end portion of the second sleeve places within the female fitting. A first seal is formed about the opening in the base of the female fitting and a second seal is formed between the first sleeve and the outside of the cannula. A force producing element urges the end portion of the second sleeve toward the base of the female fitting.Type: GrantFiled: June 28, 1978Date of Patent: June 3, 1980Assignee: Altex Scientific, Inc.Inventor: Carl L. Shackelford