Patents by Inventor David Chalfant
David Chalfant 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: 11674782Abstract: A projectile delivers a pellet payload to an increased range with increased accuracy. A two piece aerodynamically stable pusher consists of a body and tailpiece. This pusher fits into a standard 40 mm cartridge case by means of three sabots. To seal against combustion gases, a three piece split rotating band is employed.Type: GrantFiled: August 20, 2021Date of Patent: June 13, 2023Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Sean Mulvihill
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Patent number: 11402188Abstract: A two piece aerodynamic pusher consisting of a body and tailpiece. This pusher fits into a standard 40 mm cartridge case by means of three sabots. After the cartridge case is functioned, the combustion gases push the projectile forward and ignite a delay column located in the rear of the pusher. Upon muzzle exit, the sabots discard and the pusher continues down range as the delay column burns. Once the delay has burned, a charge located in the pusher body is ignited, pushing the payload out of the front of the projectile. The cap pops off, and the pellets are dispersed. This effectively moves the payload release point from the muzzle until a designated point down range based on the delay length.Type: GrantFiled: August 20, 2021Date of Patent: August 2, 2022Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Sean Mulvihill
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Patent number: 11378369Abstract: A modular constructed, standardized test device for simulating a spin stabilized projectile which is fired from a barrel having rifling grooves, comprised of the bolted together, keyed to transfer spin, modular components of replaceable rotating band, replaceable front end and back end, and filler sections for further simulation of other components. The front end has an interior recessed area which allows for a selective integration of a threaded fuze or an aerodynamic, electronic, or other structure and the rear end has a crimp groove for selective attachment of a cartridge case, and aerodynamic or other structure to mimic the rear geometry of a projectile for testing purposes.Type: GrantFiled: August 30, 2019Date of Patent: July 5, 2022Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Thomas Emanski, James Grassi, Jason Wasserman
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Patent number: 11175118Abstract: A 40 millimeter (mm) projectile is capable of deploying a payload out of the rear of the projectile. The projectile carries the payload an extended distance from the muzzle and then disperses the payload after a command is provided to the projectile. The projectile includes a proximity fuze which allows it to sense a target and disperse the payload at a given distance from the target. Alternatively, a time-based fuze or radio frequency (RF) based fuze may be employed instead. The payload may be used against a variety of targets, such as personnel, vehicle or aerial targets. In addition, the projectile could be used as a training device for proximity, preprogrammed or RF-controlled fuzed projectiles.Type: GrantFiled: May 20, 2020Date of Patent: November 16, 2021Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Thomas Michael Presutti, Jr.
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Patent number: 10926148Abstract: A snowboard support apparatus, attached to the snowboard in such a way that it extends from the board and provides a physical support for the rider to lean against in order to aid in the process of learning to snowboard. The support apparatus provides support to the rider to allow them to develop skills in being able to ride a snowboard in an incremental and natural manner without constraining the riding experience.Type: GrantFiled: March 7, 2018Date of Patent: February 23, 2021Inventor: David Chalfant Manley
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Patent number: 10584947Abstract: A sub-projectile carrier which uses aerodynamic drag to delay the release of a payload in a tailorable manner to control the spread of the payload over a desired range. A 40 mm shotgun style cartridge is shown for use for counter unmanned aerial systems, and for short range anti-personnel applications.Type: GrantFiled: August 15, 2017Date of Patent: March 10, 2020Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Thomas Michael Presutti, Jr.
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Patent number: 10408588Abstract: A retaining mechanism which may be launched to capture an unmanned aerial vehicle (UAV) or the like. A projectile deploys dampener arms to stop projectile penetration into the target while forward retention arms deploy to prevent a backward removal from the target. The firmly embedded mechanism might feature tracking means or destruction means, or the target may be pulled away by the tether to be evaluated for information.Type: GrantFiled: December 21, 2017Date of Patent: September 10, 2019Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Thomas Michael Presutti, Jr., Jeremy McLain
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Patent number: 10408591Abstract: A projectile which can be used to defeat an unmanned aerial system. The projectile features sabots which do not impart any forward impedance to the sub-projectiles, and carries a payload of stacked rings enclosed in the projectile. The rings are backed by a support ring, and abut a pusher aft section. The projectile's sabots discard cleanly upon muzzle exit, releasing the ring sub-projectiles to cover a large area, thereby increasing the probability of impacting the target. The rings create large holes in the target, despite comparatively low mass of a given ring as a defeat element, allowing for multiple sub-projectiles to be fired with a single shot, thereby creating the effect of firing multiple projectiles with a single shot.Type: GrantFiled: September 5, 2017Date of Patent: September 10, 2019Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: David Chalfant Manley, Thomas Michael Presutti, Jr.
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Publication number: 20180256956Abstract: A snowboard support apparatus, attached to the snowboard in such a way that it extends from the board and provides a physical support for the rider to lean against in order to aid in the process of learning to snowboard. The support apparatus provides support to the rider to allow them to develop skills in being able to ride a snowboard in an incremental and natural manner without constraining the riding experience.Type: ApplicationFiled: March 7, 2018Publication date: September 13, 2018Inventor: David Chalfant Manley
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Patent number: 9162964Abstract: A process comprising for preparing C1 to C4 alkyl(meth)acrylates, such as butyl acrylate, wherein vaporized reactor contents are fed directly to a column, the aqueous reflux ratio to the column is from 4 to 12, and the level of acrylic acid in the primarily organic phase separated from the overhead condensate of the column is less than 2000 ppm.Type: GrantFiled: November 7, 2011Date of Patent: October 20, 2015Inventors: David Chalfant, Jeffery Goodwin, Dmitri A. Kraptchetov, Robert Wilczynski
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Publication number: 20130245309Abstract: A process comprising for preparing C1 to C4 alkyl(meth)acrylates, such as butyl acrylate, wherein vaporized reactor contents are fed directly to a column, the aqueous reflux ratio to the column is from 4 to 12, and the level of acrylic acid in the primarily organic phase separated from the overhead condensate of the column is less than 2000 ppm.Type: ApplicationFiled: November 7, 2011Publication date: September 19, 2013Applicant: ROHM AND HAAS COMPANYInventors: David Chalfant, Jeffery Goodwin, Dmitri A. Kraptchetov, Robert Wilczynski