Patents by Inventor James Dunnam
James Dunnam 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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Publication number: 20230392909Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: ApplicationFiled: August 15, 2023Publication date: December 7, 2023Inventor: James Dunnam
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Patent number: 11725915Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: GrantFiled: July 11, 2022Date of Patent: August 15, 2023Inventor: James Dunnam
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Publication number: 20220364837Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: ApplicationFiled: July 11, 2022Publication date: November 17, 2022Inventor: James Dunnam
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Patent number: 11385034Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: GrantFiled: September 23, 2019Date of Patent: July 12, 2022Inventor: James Dunnam
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Publication number: 20200166315Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: ApplicationFiled: September 23, 2019Publication date: May 28, 2020Inventor: James Dunnam
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Patent number: 10422610Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: GrantFiled: August 22, 2018Date of Patent: September 24, 2019Inventor: James Dunnam
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Publication number: 20180347956Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a powder pocket positioned adjacent to the cartridge casing, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: ApplicationFiled: August 22, 2018Publication date: December 6, 2018Inventor: James Dunnam
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Publication number: 20180202782Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a primer pocket positioned adjacent to the cartridge casing, a powder pocket positioned adjacent to the primer pocket, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: ApplicationFiled: May 22, 2017Publication date: July 19, 2018Inventor: James Dunnam
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Patent number: 10024638Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a primer pocket positioned adjacent to the cartridge casing, a powder pocket positioned adjacent to the primer pocket, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: GrantFiled: May 22, 2017Date of Patent: July 17, 2018Inventor: James Dunnam
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Patent number: 9658038Abstract: Systems, methods and apparatus are provided through which in some implementations an ammunition cartridge includes a cartridge casing having a longitudinal center axis, a primer pocket positioned adjacent to the cartridge casing, a powder pocket positioned adjacent to the primer pocket, a powder/propellant in the powder pocket, a piston bore positioned adjacent to the powder pocket, a piston in the piston bore, and a payload bay positioned adjacent to the payload bay, wherein the piston is not coupled to the cartridge, wherein the piston is in direct contact with the payload bay so that pressure from powder/propellant is immediately and directly applied to the payload bay having a payload, wherein a diameter of the powder pocket is less than an inside diameter of the cartridge casing to provide a reduced velocity to the payload.Type: GrantFiled: January 18, 2017Date of Patent: May 23, 2017Inventor: James Dunnam
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Publication number: 20050056184Abstract: A ballistic tracer platform for use with a shotgun shell to provide an aiming and training aid for shotgun shooting sports, which also can be used for military and police applications. The ballistic tracer platform carries a tracer element, which provides the shooter with a consistent reference to make corrections to his or her aiming point and shooting techniques. The ballistic tracer platform can be used in ordinary shotgun shells. The ballistic tracer platform consists of a cylindrical structure with a coaxial cylindrical cavity in which the tracer element is disposed. The tracer element can be composed of incendiary or non-incendiary materials. The ballistic tracer platform can be modified to improve its ballistic shape, such as modifying the shape of its nose. Mass can be added to cavities formed in the ballistic tracer platform in order to adjust the weight of the device. Grooves, fins, or orifices can be formed in surface of the device to create additional spin.Type: ApplicationFiled: September 5, 2003Publication date: March 17, 2005Inventors: James Dunnam, Mauricio Quintana
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Patent number: 4443156Abstract: A control system for a compressor utilized in transferring natural gas from relatively low pressure wells to a relatively high pressure pipe line incorporating automatic shutdown of the compressor and automatic restart of the compressor in response to certain conditions with the compressor operating at a desired flow rate regardless of upstream fluctuations in pressure. The compressor is unloaded upon shutdown and remains unloaded for a timed duration after startup thereby reducing the required motor size, compressor wear and also eliminating manual startup for most of the usual causes of gas compressor shutdown, such as low well pressure and high discharge line pressure.Type: GrantFiled: February 10, 1981Date of Patent: April 17, 1984Inventor: James A. Dunnam, Jr.