Patents by Inventor Timothy J. Schrader

Timothy J. Schrader 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: 10414542
    Abstract: A concave pallet with an inwardly sloping surface and lip is disclosed. The concave pallet includes a plurality of inwardly sloping surfaces meeting a surface plane equidistantly from the center point of the pallet. A lip encompasses the perimeter of the pallet and secures packages on the pallet. The lip interlocks with the bases of alike pallets for efficient stacking and storage when not in use for package shipment.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: September 17, 2019
    Assignee: Walmart Apollo, LLC
    Inventors: Jacob R. Schrader, Timothy J. Burleson, John S. Meredith
  • Patent number: 9980413
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: May 22, 2018
    Assignee: Liebert Corporation
    Inventors: John F. Judge, Timothy J. Schrader, Stephen Sillato, Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier, Zhiyong Lin, Benedict J. Dolcich, Daniel J. Schutte, Greg Haggy
  • Patent number: 9845981
    Abstract: A cooling system has a direct expansion mode and a pumped refrigerant economizer mode and a controller. The controller includes a load estimator that estimates real-time indoor load on the cooling system and uses the estimated real-time indoor load to determine whether to operate the cooling system in the pumped refrigerant economizer mode or in the direct expansion mode.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: December 19, 2017
    Assignee: Liebert Corporation
    Inventors: Zongtao Lu, Greg Haggy, Timothy J. Schrader, Stephen Sillato, John F. Judge
  • Patent number: 9316424
    Abstract: A cooling system has a plurality of separate cooling stages including an upstream cooling stage having an upstream cooling circuit and a downstream cooling stage including a downstream cooling circuit, which are each a direct expansion cooling circuit including a tandem compressor. Each tandem compressor includes a fixed capacity compressor and a variable capacity compressor. A controller controls the fixed capacity compressor and variable capacity compressor of each tandem compressor based on a Call for Cooling, which of a plurality of ranges the Call for Cooling falls within, and whether the Call for Cooling is ramping up or ramping down.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: April 19, 2016
    Assignee: Liebert Corporation
    Inventors: Zhiyong Lin, Roger Noll, John F. Judge, Gary A. Helmink, Benedict J. Dolcich, Daniel J. Schutte, Timothy J. Schrader
  • Publication number: 20160061495
    Abstract: A cooling system has a cooling circuit that includes an evaporator disposed in a cabinet, a condenser, a compressor, a liquid/vapor separator tank and a liquid pump. The cooling circuit has a mode wherein the compressor and liquid pump are both on with the liquid pump pumping refrigerant through the evaporator with the refrigerant leaving the evaporator circulated to an inlet of the liquid/vapor separator tank and not to an inlet of the condenser. The cooling circuit also has a pumped refrigerant economizer mode wherein the liquid pump is on and the compressor is off and bypassed with the refrigerant leaving the evaporator circulated to the inlet of the condenser and not to the inlet of the liquid/vapor separator tank.
    Type: Application
    Filed: October 9, 2015
    Publication date: March 3, 2016
    Applicant: LIEBERT CORPORATION
    Inventors: Stephen Sillato, Timothy J. Schrader, Greg Haggy, Thomas Harvey, Zongtao Lu, John F. Judge
  • Patent number: 9140475
    Abstract: A cooling system includes a cooling circuit having an evaporator, a condenser, a compressor, an expansion device, a liquid pump, and a receiver/surge tank coupled between the condenser and the liquid pump. The cooling system has a direct expansion mode and a pumped refrigerant economizer mode. When the cooling system switches from the direct expansion mode to the pumped refrigerant economizer mode, refrigerant is flushed from the refrigerant/surge tank so that the cooling circuit is overcharged when it begins operating in the pumped refrigerant economizer mode.
    Type: Grant
    Filed: November 13, 2013
    Date of Patent: September 22, 2015
    Assignee: Liebert Corporation
    Inventors: Timothy J. Schrader, Greg Haggy, Stephen Sillato
  • Publication number: 20150230367
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Application
    Filed: April 22, 2015
    Publication date: August 13, 2015
    Applicant: Liebert Corporation
    Inventors: John F. JUDGE, Timothy J. SCHRADER, Stephen SILLATO, Roger NOLL, Gary A. HELMINK, Pierpaolo BARBATO, Giuseppe Dalla MANA, Lou MONNIER, Zhiyong LIN, Benedict J. DOLCICH, Daniel J. SCHUTTE, Greg HAGGY
  • Patent number: 9038404
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: May 26, 2015
    Assignee: Liebert Corporation
    Inventors: John F. Judge, Timothy J. Schrader, Stephen Sillato, Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier, Zhiyong Lin, Benedict J. Dolcich, Daniel J. Schutte, Greg Haggy, Thomas Harvey, Zongtao Lu
  • Publication number: 20140157821
    Abstract: A cooling system includes a cooling circuit having an evaporator, a condenser, a compressor, an expansion device, a liquid pump, and a receiver/surge tank coupled between the condenser and the liquid pump. The cooling system has a direct expansion mode and a pumped refrigerant economizer mode. When the cooling system switches from the direct expansion mode to the pumped refrigerant economizer mode, refrigerant is flushed from the refrigerant/surge tank so that the cooling circuit is overcharged when it begins operating in the pumped refrigerant economizer mode.
    Type: Application
    Filed: November 13, 2013
    Publication date: June 12, 2014
    Inventors: Timothy J. SCHRADER, Greg HAGGY, Stephen SILLATO
  • Patent number: 8726976
    Abstract: A heat exchanger can have a manifold which includes a plurality of laminated sheets that allow a customization of the heat exchanger. The design can allow for a more optimal flow of coolant to areas of high load, thereby making the temperature distribution across the heat exchanger more uniform, or intentionally non-uniform. Furthermore, the laminated sheets can allow multiple circuits to be employed in the heat exchanger such that different coolants can be utilized therein and maintained separate from one another. The tubes can be microchannel tubes. A single set of manifolds can be used with multiple heat exchanger cores to provide a more compact heat exchanger. Mounting features can be integral with a group of the sheets.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: May 20, 2014
    Assignee: Liebert Corporation
    Inventors: Timothy J. Schrader, Ian G. Spearing
  • Publication number: 20140033753
    Abstract: A cooling system has a direct expansion mode and a pumped refrigerant economizer mode and a controller. The controller includes a load estimator that estimates real-time indoor load on the cooling system and uses the estimated real-time indoor load to determine whether to operate the cooling system in the pumped refrigerant economizer mode or in the direct expansion mode.
    Type: Application
    Filed: October 4, 2013
    Publication date: February 6, 2014
    Inventors: Zongtao LU, Greg HAGGY, Timothy J. SCHRADER, Stephen SILLATO, John F. JUDGE
  • Publication number: 20130098086
    Abstract: A cooling system has a cooling circuit that includes an evaporator disposed in a cabinet, a condenser, a compressor, an electronic expansion valve and a liquid pump. a direct expansion mode and a pumped refrigerant economizer mode. When the cooling system is in the pumped refrigerant economizer mode, the controller controls a temperature of the refrigerant to a refrigerant temperature set point by regulating a speed of a fan of the condenser, controls a temperature of air in a room in which the cabinet is disposed to a room air temperature setpoint by regulating a speed of the liquid pump, and maintains a pressure differential across the liquid pump within a given range by regulating an open position of an electronic expansion valve.
    Type: Application
    Filed: April 13, 2012
    Publication date: April 25, 2013
    Applicant: Liebert Corporation
    Inventors: Stephen Sillato, Timothy J. Schrader, Greg Haggy, Thomas Harvey, Zongtao Lu, John F. Judge
  • Publication number: 20130098085
    Abstract: A cooling system has a cabinet and a plurality of separate cooling stages including an upstream cooling stage and a downstream cooling stage. At least the upstream cooling state is a variable capacity cooling stage. Each cooling stage has a cooling circuit. Evaporators of the cooling circuits are arranged in the cabinet so that air passes over them in serial fashion. A controller when a Call for Cooling first reaches a point where cooling is needed, operating the upstream cooling circuit to provide cooling and not the downstream cooling circuit. When the Call for Cooling has increased to a second point, the controller additionally operates the downstream cooling circuit to provide cooling. The cooling capacity at which the upstream cooling circuit is being operated is less than its full capacity when the Call for Cooling reaches the second point.
    Type: Application
    Filed: April 13, 2012
    Publication date: April 25, 2013
    Applicant: Liebert Corporation
    Inventors: John F. Judge, Timothy J. Schrader, Stephen Sillato, Roger Noll, Gary A. Helmink, Pierpaolo Barbato, Giuseppe Dalla Mana, Lou Monnier, Zhiyong Lin, Benedict J. Dolcich, Daniel J. Schutte, Greg Haggy, Thomas Harvey, Zongtao Lu
  • Publication number: 20130098088
    Abstract: A cooling system has a plurality of separate cooling stages including an upstream cooling stage having an upstream cooling circuit and a downstream cooling stage including a downstream cooling circuit, which are each a direct expansion cooling circuit including a tandem compressor. Each tandem compressor includes a fixed capacity compressor and a variable capacity compressor. A controller controls the fixed capacity compressor and variable capacity compressor of each tandem compressor based on a Call for Cooling, which of a plurality of ranges the Call for Cooling falls within, and whether the Call for Cooling is ramping up or ramping down.
    Type: Application
    Filed: April 13, 2012
    Publication date: April 25, 2013
    Applicant: Liebert Corporation
    Inventors: Zhiyong Lin, Roger Noll, John F. Judge, Gary A. Helmink, Benedict J. Dolcich, Daniel J. Schutte, Timothy J. Schrader
  • Publication number: 20130091874
    Abstract: A variable flow refrigerant system having a compressor and one or a plurality of evaporators. The suction at one or the plurality of evaporators for the input to the compressor is monitored and generally corresponds to the minimum pressure of the refrigerant. The pressure is associated with a temperature and is controlled to always be above the dew point temperature of the room.
    Type: Application
    Filed: April 3, 2012
    Publication date: April 18, 2013
    Applicant: LIEBERT CORPORATION
    Inventors: Stephen Sillato, Timothy J. Schrader, Lou Monnier, John F. Judge
  • Patent number: 8289710
    Abstract: Mounting systems are provided for bringing a heat exchanger from a server rack into thermal contact with a heat exchanger from an electronics server. An engaging force is applied to the two heat exchangers to create thermal communication there between. A mounting mechanism is configured to isolate the engaging force applied to the two heat exchangers. The mounting mechanism may include an interlocking mechanism that prevents transfer of the applied force to the rest of the electronics server to lessen the possibility of disconnecting the electrical connections between the electronics server and the rack, and/or lessening mechanical stresses transferred to the electronics server and the rack chassis. The mounting mechanism also may be coupled to the electronics server locking mechanism such that the action of locking the electronics server into the rack causes the heat exchangers to engage in thermal contact.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: October 16, 2012
    Assignee: Liebert Corporation
    Inventors: Ian G. Spearing, Timothy J Schrader
  • Patent number: 7602609
    Abstract: A system of cooling and method of use that includes a connector having a data reader capable of reading a wireless identifier and/or a breaker box capable of routing liquid cooling to at least one server. In a preferred embodiment, both the quick connector and the breaker box are used in conjunction with a liquid coolant such as refrigerant or water.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: October 13, 2009
    Assignee: Liebert Corporation
    Inventors: Ian Spearing, Timothy J. Schrader
  • Publication number: 20090217527
    Abstract: A heat exchanger core tube having a body with at least one internal fluid passage and having at least one end adapted such that an effective height results that is less than or equal to the inside diameter of a manifold and can allow the body of the core tube to have a height greater than the inside diameter of the manifold. The at least one adapted end may comprise an adapter and may be twisted such that the longitudinal axis of a core tube remains substantially normal to the longitudinal axis of the manifold and wherein the end of the core tube is angled less than 90 degrees with respect to the tube body.
    Type: Application
    Filed: May 5, 2009
    Publication date: September 3, 2009
    Applicant: Liebert Corporation
    Inventor: Timothy J. Schrader
  • Publication number: 20090211743
    Abstract: A heat exchanger can have a manifold which includes a plurality of laminated sheets that allow a customization of the heat exchanger. The design can allow for a more optimal flow of coolant to areas of high load, thereby making the temperature distribution across the heat exchanger more uniform, or intentionally non-uniform. Furthermore, the laminated sheets can allow multiple circuits to be employed in the heat exchanger such that different coolants can be utilized therein and maintained separate from one another. The tubes can be microchannel tubes. A single set of manifolds can be used with multiple heat exchanger cores to provide a more compact heat exchanger. Mounting features can be integral with a group of the sheets.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 27, 2009
    Applicant: Liebert Corporation
    Inventors: Timothy J. Schrader, Ian G. Spearing
  • Publication number: 20090161312
    Abstract: Mounting systems are provided for bringing a heat exchanger from a server rack into thermal contact with a heat exchanger from an electronics server. An engaging force is applied to the two heat exchangers to create thermal communication there between. A mounting mechanism is configured to isolate the engaging force applied to the two heat exchangers. The mounting mechanism may include an interlocking mechanism that prevents transfer of the applied force to the rest of the electronics server to lessen the possibility of disconnecting the electrical connections between the electronics server and the rack, and/or lessening mechanical stresses transferred to the electronics server and the rack chassis. The mounting mechanism also may be coupled to the electronics server locking mechanism such that the action of locking the electronics server into the rack causes the heat exchangers to engage in thermal contact.
    Type: Application
    Filed: January 9, 2009
    Publication date: June 25, 2009
    Applicant: LIEBERT CORPORATION
    Inventors: IAN G. SPEARING, TIMOTHY J. SCHRADER