Patents by Inventor David Jonathan Chalk

David Jonathan Chalk 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).

  • Publication number: 20220128195
    Abstract: A method and system for forming a compressed gas and dispensing it to a compressed gas receiver. The compressed gas is formed from a process fluid provided at a cryogenic temperature. The forming includes pressurizing the process fluid, feeding the pressurized process fluid at still a cryogenic temperature to a heat exchanger and heating it in indirect heat exchange with a thermal fluid which is provided in a reservoir at a thermal fluid temperature above the cryogenic temperature of the pressurized process fluid. Once heated to a suitable temperature the compressed gas may be dispensed to the compressed gas receiver or stored in one or more compressed gas storage vessels for later use.
    Type: Application
    Filed: October 28, 2020
    Publication date: April 28, 2022
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Michael Cacciapalle, Joseph P. Cohen, David Jonathan Chalk, David John Farese, Anthony R. Kyvelos
  • Patent number: 10883483
    Abstract: A seal assembly for a reciprocating rod of a reciprocating compressor, a reciprocating compressor with the seal assembly, and a method of operating the reciprocating compressor with the seal assembly to prevent leakage of gas once the compressor has been shut down. The pressure difference between opposite sides of a static seal is kept low during normal operation to reduce wear of the static seal. When the compressor is shut down, a high pressure difference between opposite sides of the static seal assists with sealing.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: January 5, 2021
    Assignee: Air Products and Chemicals, Inc.
    Inventor: David Jonathan Chalk
  • Patent number: 10876634
    Abstract: An annular seal assembly for use in a fluid mover, such as a compressor, having a tangentially-cut ring assembly and a radially-cut ring assembly, each ring assembly having arcuate segments, where each arcuate segment of the tangentially-cut ring assembly has a plurality of passages extending from the outer peripheral face to within at least 1.0 mm of the inner peripheral face, wherein after wearing in of the seal, the passages extend through the tangentially-cut ring assembly for pressure balancing.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: December 29, 2020
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, Gregory Peter Hupp, Douglas R. Williams, Lance Michael Grimm
  • Publication number: 20200332900
    Abstract: An annular seal assembly for use in a fluid mover, such as a compressor, having a tangentially-cut ring assembly and a radially-cut ring assembly, each ring assembly having arcuate segments, where each arcuate segment of the tangentially-cut ring assembly has a plurality of passages extending from the outer peripheral face to within at least 1.0 mm of the inner peripheral face, wherein after wearing in of the seal, the passages extend through the tangentially-cut ring assembly for pressure balancing.
    Type: Application
    Filed: April 18, 2019
    Publication date: October 22, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, Gregory Peter Hupp, Douglas R. Williams, Lance Michael Grimm
  • Publication number: 20200102946
    Abstract: A seal assembly for a reciprocating rod of a reciprocating compressor, a reciprocating compressor with the seal assembly, and a method of operating the reciprocating compressor with the seal assembly to prevent leakage of gas once the compressor has been shut down. The pressure difference between opposite sides of a static seal is kept low during normal operation to reduce wear of the static seal. When the compressor is shut down, a high pressure difference between opposite sides of the static seal assists with sealing.
    Type: Application
    Filed: September 28, 2018
    Publication date: April 2, 2020
    Applicant: Air Products and Chemicals, Inc.
    Inventor: David Jonathan Chalk
  • Patent number: 9494281
    Abstract: Systems and methods are provided for compressing a cryogenic fluid using a multi-stage compressor. Coolant in a first coolant loop cools cooling jackets of the compression stages and/or inter-stage heat exchangers and warms a pre-compression heat exchanger. The temperature of the coolant in the first heat exchanger is moderated by ambient-air heat exchange. The process fluid is electively cooled by one of the interstage heat exchangers after each of the compression stage if the temperature of the process fluid is above a temperature criterion. This enables the system to operate through a transient period (cool down period) without venting process fluid. The interstage heat exchangers are preferably bypassed when the system reaches steady-state operating temperature.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: November 15, 2016
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, David John Farese
  • Patent number: 8807571
    Abstract: A seal assembly for a reciprocating piston system is provided that compensates for uneven wear rates between the ring components of the seal assembly by initially sizing a portion of the width of the sealing ring larger than the width of the annular recess in the cover ring, this portion at least partially overlapping the gap in the cover ring but not the gap in the sealing ring.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: August 19, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, Larry Thomas Stein
  • Publication number: 20140090554
    Abstract: A seal assembly for a reciprocating piston system is provided that compensates for uneven wear rates between the ring components of the seal assembly by initially sizing a portion of the width of the sealing ring larger than the width of the annular recess in the cover ring, this portion at least partially overlapping the gap in the cover ring but not the gap in the sealing ring.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 3, 2014
    Applicant: Air Products and chemicals, Inc.
    Inventors: David Jonathan Chalk, Larry Thomas Stein
  • Publication number: 20130125568
    Abstract: Systems and methods are provided for compressing a cryogenic fluid using a multi-stage compressor. Coolant in a first coolant loop cools cooling jackets of the compression stages and/or inter-stage heat exchangers and warms a pre-compression heat exchanger. The temperature of the coolant in the first heat exchanger is moderated by ambient-air heat exchange. The process fluid is electively cooled by one of the inter-stage heat exchangers after each of the compression stage if the temperature of the process fluid is above a temperature criterion. This enables the system to operate through a transient period (cool down period) without venting process fluid. The inter-stage heat exchangers are preferably bypassed when the system reaches steady-state operating temperature.
    Type: Application
    Filed: March 13, 2012
    Publication date: May 23, 2013
    Applicant: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, David John Faerse
  • Patent number: 7488159
    Abstract: Gas compression system comprising a compression cylinder having a gas inlet, a compressed gas outlet, and one or more liquid transfer ports; a pump having a suction and a discharge; and a compressor liquid. The system also includes any of the following: a pressure intensifier having an inlet in flow communication with the pump and an outlet in flow communication with the compression cylinder; a feed eductor in flow communication with the discharge of the pump, with a reservoir containing a portion of the compressor liquid, and with the compression cylinder; a drain eductor in flow communication with the discharge of the pump, with the compression cylinder, and with a reservoir containing a portion of the compressor liquid; and a variable-volume compressor liquid accumulator in flow communication with the discharge of the pump.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 10, 2009
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Bharat Lajjaram Bhatt, William Curtis Kottke, David Jonathan Chalk, Todd Eric Carlson
  • Patent number: 7410348
    Abstract: A pumping/compressing apparatus for use in a fluid handling system transferring a fluid from one location, e.g., a tank, to another location or to an end use is provided. The apparatus basically includes a motor and a multistage, e.g., two stage, device including at least one reciprocating piston, an inlet stage chamber, an outlet stage chamber, an inlet, and an outlet. The piston is arranged to be reciprocated at multiple, e.g., respective first and second, speeds. The second speed is higher than the first speed, whereupon when the piston is reciprocated at the first speed the device effectively pumps liquid or mostly liquid to the outlet. When the piston is reciprocated at the second speed the device effectively compresses gas or mostly gas fluid and provides it to the outlet. A blowby port may be provided to provide blowby fluid back to the tank or the device.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: August 12, 2008
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, David John Farese
  • Publication number: 20070028628
    Abstract: A pumping/compressing apparatus for use in a fluid handling system transferring a fluid from one location, e.g., a tank, to another location or to an end use is provided. The apparatus basically includes a motor and a multistage, e.g., two stage, device including at least one reciprocating piston, an inlet stage chamber, an outlet stage chamber, an inlet, and an outlet. The piston is arranged to be reciprocated at multiple, e.g., respective first and second, speeds. The second speed is higher than the first speed, whereupon when the piston is reciprocated at the first speed the device effectively pumps liquid or mostly liquid to the outlet. When the piston is reciprocated at the second speed the device effectively compresses gas or mostly gas fluid and provides it to the outlet. A blowby port may be provided to provide blowby fluid back to the tank or the device.
    Type: Application
    Filed: August 3, 2005
    Publication date: February 8, 2007
    Inventors: David Jonathan Chalk, David John Farese
  • Patent number: 7168446
    Abstract: A check valve for use in a pump. The valve is arranged to be subjected to severe service conditions and high impact loads, yet be resistant to damage to its components. The check includes a body, a valve seat, a poppet and an impact cushion. The poppet is movably coupled to the valve seat and is biased by a spring into engagement with the valve seat. Upon the opening of the valve the poppet moves off of the valve seat and into engagement with the impact cushion against the spring bias. The impact cushion is movably coupled to the valve body and is biased by another spring. When the poppet engages the impact cushion they stay together and move, with the movement of the impact cushion absorbing energy from the poppet.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: January 30, 2007
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, Thomas T. Hand, David John Farese
  • Patent number: 6530761
    Abstract: A reciprocating pump includes a housing, a piston slideably mounted within the housing for a reciprocating movement, a shaft connected to the piston and adapted for reciprocating movement concurrently with the piston, an inlet valve, a discharge valve, and an interstage valve means. A first chamber on one side of the piston is in fluid communication with an inlet and a second chamber on the opposite side of the piston is in fluid communication with a discharge, and the first and second chambers are in fluid communication. At least part of the shaft is in the second chamber. The interstage valve means, which controls the fluid flowing from the first chamber to the second chamber, is closed during a suction stroke and is open during a compression stroke.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: March 11, 2003
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, Donald Earl Thompson, David John Farese
  • Patent number: 6474078
    Abstract: An apparatus for transferring fluid from a vessel includes a pump, a first conduit, and a control means in fluid communication with the pump and having open and closed positions. The first end of the conduit is in fluid communication with the vessel and a second end of the conduit is in fluid communication with an inlet of the pump. The control means alternates between the open and the closed positions, whereby a stream of fluid flows into the pump inlet from the conduit when the control means first alternates to the open position, the control means alternates to the closed position and the fluid vaporizes in the pump thereby forming a vaporized portion of the fluid, and a stream of the vaporized portion of the fluid flows out of a pump outlet when the control means alternates again to the open position.
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: November 5, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David Jonathan Chalk, Donald Earl Thompson, John Francis Fischl, David John Farese
  • Publication number: 20020145259
    Abstract: A seal assembly includes a top ring, a bottom ring, a first spring for axial loading, and a second spring for radial loading. The seal assembly is particularly useful with a double-acting, two-stage pump for pumping cryogenic fluids. The seal assembly may be used as a piston ring to seal a reciprocating piston with the inner wall of the housing of a pump and/or as a shaft ring to seal a reciprocating shaft operating within a bore.
    Type: Application
    Filed: April 4, 2001
    Publication date: October 10, 2002
    Inventor: David Jonathan Chalk
  • Publication number: 20020144509
    Abstract: An apparatus for transferring fluid from a vessel includes a pump, a first conduit, and a control means in fluid communication with the pump and having open and closed positions. The first end of the conduit is in fluid communication with the vessel and a second end of the conduit is in fluid communication with an inlet of the pump. The control means alternates between the open and the closed positions, whereby a stream of fluid flows into the pump inlet from the conduit when the control means first alternates to the open position, the control means alternates to the closed position and the fluid vaporizes in the pump thereby forming a vaporized portion of the fluid, and a stream of the vaporized portion of the fluid flows out of a pump outlet when the control means alternates again to the open position.
    Type: Application
    Filed: April 4, 2001
    Publication date: October 10, 2002
    Inventors: David Jonathan Chalk, Donald Earl Thompson, John Francis Fischl, David John Farese
  • Patent number: 6011456
    Abstract: An open architecture recondensing superconducting magnet utilizing an upper and lower cryogen vessel connected by a passageway which extends above the bottom of upper cryogen vessel to discontinue the flow of liquid cryogen through the passageway to reserve liquid cryogen in the upper cryogen vessel when the cryogen level falls to provide an increased ride-through period in the event of a depleting liquid cryogen supply due to failure of the cryogen gas recondenser. A signal is provided to indicate the need to correct the failure.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: January 4, 2000
    Inventors: Phillip W. Eckels, David Jonathan Chalk, Thomas Joseph, Joseph Anthony Schillinger