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).

  • Patent number: 11674782
    Abstract: 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: Grant
    Filed: August 20, 2021
    Date of Patent: June 13, 2023
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Sean Mulvihill
  • Patent number: 11402188
    Abstract: 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: Grant
    Filed: August 20, 2021
    Date of Patent: August 2, 2022
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Sean Mulvihill
  • Patent number: 11378369
    Abstract: 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: Grant
    Filed: August 30, 2019
    Date of Patent: July 5, 2022
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Thomas Emanski, James Grassi, Jason Wasserman
  • Patent number: 11175118
    Abstract: 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: Grant
    Filed: May 20, 2020
    Date of Patent: November 16, 2021
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Thomas Michael Presutti, Jr.
  • Patent number: 10926148
    Abstract: 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: Grant
    Filed: March 7, 2018
    Date of Patent: February 23, 2021
    Inventor: David Chalfant Manley
  • Patent number: 10584947
    Abstract: 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: Grant
    Filed: August 15, 2017
    Date of Patent: March 10, 2020
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Thomas Michael Presutti, Jr.
  • Patent number: 10408588
    Abstract: 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: Grant
    Filed: December 21, 2017
    Date of Patent: September 10, 2019
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Thomas Michael Presutti, Jr., Jeremy McLain
  • Patent number: 10408591
    Abstract: 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: Grant
    Filed: September 5, 2017
    Date of Patent: September 10, 2019
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: David Chalfant Manley, Thomas Michael Presutti, Jr.
  • Publication number: 20180256956
    Abstract: 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: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Inventor: David Chalfant Manley
  • Patent number: 9162964
    Abstract: 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: Grant
    Filed: November 7, 2011
    Date of Patent: October 20, 2015
    Inventors: David Chalfant, Jeffery Goodwin, Dmitri A. Kraptchetov, Robert Wilczynski
  • Publication number: 20130245309
    Abstract: 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: Application
    Filed: November 7, 2011
    Publication date: September 19, 2013
    Applicant: ROHM AND HAAS COMPANY
    Inventors: David Chalfant, Jeffery Goodwin, Dmitri A. Kraptchetov, Robert Wilczynski