Patents by Inventor William L. Waldschmidt
William L. Waldschmidt 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: 8522564Abstract: A temperature control system includes a compressor, a condenser, an evaporator, a receiver, and an accumulator. A valve is positioned between the evaporator and the receiver. An evacuation line has a first end in fluid communication with heat transfer fluid between the valve and the receiver, and a second end in fluid communication with the accumulator. The evacuation line provides for flow of the heat transfer fluid from both of the first heat exchanger and the receiver to the accumulator during an evacuation mode of operation of the temperature control system. The valve can take the form of a check valve or an expansion valve without a bleed port.Type: GrantFiled: June 7, 2011Date of Patent: September 3, 2013Assignee: Thermo King CorporationInventors: Srinivasa Rao Koppineedi, Vladimir Sulc, William L. Waldschmidt, Joe A. Wermager
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Patent number: 8476872Abstract: A system for reducing an alternator's load on an engine when the engine drives a second load. The system includes an alternator, a battery, a resistor, and a switch. The alternator includes a stator, a voltage regulator, a rectifier, and a field coil. The battery has a first terminal coupled to the alternator and a second terminal coupled to the alternator. The resistor has a first lead coupled to the first terminal and a second lead coupled to the field coil. The switch is coupled in parallel across the resistor, and is open when the engine drives the second load and closed when the engine is not driving the second load.Type: GrantFiled: August 12, 2010Date of Patent: July 2, 2013Assignee: Thermo King CorporationInventors: Gregory R. Truckenbrod, William L. Waldschmidt, John Steven McFadden, Vidhey Vijay Trivedi
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Publication number: 20120312036Abstract: A temperature control system includes a compressor, a condenser, an evaporator, a receiver, and an accumulator. A valve is positioned between the evaporator and the receiver. An evacuation line has a first end in fluid communication with heat transfer fluid between the valve and the receiver, and a second end in fluid communication with the accumulator. The evacuation line provides for flow of the heat transfer fluid from both of the first heat exchanger and the receiver to the accumulator during an evacuation mode of operation of the temperature control system. The valve can take the form of a check valve or an expansion valve without a bleed port.Type: ApplicationFiled: June 7, 2011Publication date: December 13, 2012Applicant: THERMO KING CORPORATIONInventors: Srinivasa Rao Koppineedi, Vladimir Sulc, William L. Waldschmidt, Joe A. Wermager
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Patent number: 8266917Abstract: An environmentally controlled shipping container including a storage space, a first environmentally controlled space within the storage space, a second environmentally controlled space within the storage space, and a transport refrigeration unit. The transport refrigeration unit including a compressor that provides a flow of refrigerant, a condenser that receives the flow of refrigerant from the compressor, a first evaporator positioned within the first environmentally controlled space and in fluid communication with the condenser, a second evaporator positioned within the second environmentally controlled space and in fluid communication with the condenser, and a pressure regulator associated with the first evaporator. The pressure regulator selectively restricts the flow of refrigerant from the first evaporator to the compressor such that the flow of refrigerant from the first evaporator to the compressor is substantially equal to the flow of refrigerant from the second evaporator to the compressor.Type: GrantFiled: July 30, 2009Date of Patent: September 18, 2012Assignee: Thermo King CorporationInventors: William L. Waldschmidt, Timothy J. Neu, Dean M. Parker
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Publication number: 20110037441Abstract: A system for reducing an alternator's load on an engine when the engine drives a second load. The system includes an alternator, a battery, a resistor, and a switch. The alternator includes a stator, a voltage regulator, a rectifier, and a field coil. The battery has a first terminal coupled to the alternator and a second terminal coupled to the alternator. The resistor has a first lead coupled to the first terminal and a second lead coupled to the field coil. The switch is coupled in parallel across the resistor, and is open when the engine drives the second load and closed when the engine is not driving the second load.Type: ApplicationFiled: August 12, 2010Publication date: February 17, 2011Applicant: THERMO KING CORPORATIONInventors: Gregory R. Truckenbrod, William L. Waldschmidt, John Steven McFadden, Vidhey Vijay Trivedi
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Publication number: 20100024450Abstract: An environmentally controlled shipping container including a storage space, a first environmentally controlled space within the storage space, a second environmentally controlled space within the storage space, and a transport refrigeration unit. The transport refrigeration unit including a compressor that provides a flow of refrigerant, a condenser that receives the flow of refrigerant from the compressor, a first evaporator positioned within the first environmentally controlled space and in fluid communication with the condenser, a second evaporator positioned within the second environmentally controlled space and in fluid communication with the condenser, and a pressure regulator associated with the first evaporator. The pressure regulator selectively restricts the flow of refrigerant from the first evaporator to the compressor such that the flow of refrigerant from the first evaporator to the compressor is substantially equal to the flow of refrigerant from the second evaporator to the compressor.Type: ApplicationFiled: July 30, 2009Publication date: February 4, 2010Applicant: THERMO KING CORPORATIONInventors: William L. Waldschmidt, Timothy J. Neu, Dean M. Parker
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Patent number: 5415014Abstract: A refrigerant receiver tank assembly having a refrigerant inlet flow path for receiving refrigerant from a condenser coil and a refrigerant outlet flow path for supplying refrigerant to an evaporator coil. The receiver tank assembly includes a tank and a manifold which define a closed space for holding a supply level of liquid refrigerant. The refrigerant inlet flow path includes an outlet opening in the closed space, and an inlet opening. The manifold defines the refrigerant outlet flow path, with the refrigerant outlet flow path having an inlet opening in the closed space, and first and second outlet openings. A pick-up tube is disposed in the closed space having a first end connected to the inlet opening of the refrigerant outlet flow path and a second end disposed below the level of liquid refrigerant in the closed space. A controllable valve is mounted on the manifold which selectively controls flow of refrigerant to a predetermined outlet opening of the refrigerant outlet flow path.Type: GrantFiled: March 21, 1994Date of Patent: May 16, 1995Assignee: Thermo King CorporationInventors: William L. Waldschmidt, William P. Maxwell, Bruce E. McClellan
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Patent number: 5322331Abstract: A hose coupling, and method of constructing same, for sealably interconnecting a flexible hose and a rigid center pipe. The hose coupling is assembled without requiring relative rotation between the rigid center pipe and the inner surface of the flexible hose.Type: GrantFiled: July 26, 1993Date of Patent: June 21, 1994Assignee: Thermo King CorporationInventors: William L. Waldschmidt, Bruce E. McClellan
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Patent number: 5222373Abstract: A transport refrigeration system having separate evaporator and condenser units, with the condenser unit being mountable in either a vertical or a horizontal orientation. The condenser unit includes a frame supporting a condenser coil, a compressor and a refrigerant receiver. The compressor is a dry sump compressor having a predetermined centerline, with the compressor being operable with said predetermined centerline in any orientation within 45.degree. of a vertical centerline through the compressor. The compressor is oriented on the frame such that when the frame is oriented for vertical mounting the predetermined centerline of the compressor defines a first angle of about 45.degree. with the vertical centerline, and when the frame is oriented for horizontal mounting the predetermined centerline of the compressor defines a second angle of about 45.degree. with the vertical centerline, with the first and second angles being on opposite sides of the vertical centerline.Type: GrantFiled: September 16, 1992Date of Patent: June 29, 1993Assignee: Thermo King CorporationInventor: William L. Waldschmidt
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Patent number: 4811569Abstract: A zero cube transport refrigeration unit suitable for a straight truck having a component arrangement which minimizes the height of the unit to provide maximum clearance for tilt cabs, and an air flow arrangement which discharges all noise generated by an internal combustion engine vertically upward from the top of the unit. Prime mover, evaporator, compressor and comdenser sections are laterally spaced from one side of the unit to the other, and a single power shaft runs through all of the sections. Evaporator and condenser air movers are directly mounted on the power shaft while the internal combustion engine, compressor, and optional electric standby motor, are all belted to the power shaft. The evaporator air mover is a centrifugal blower wheel, which provides excellent air distribution in the load space of a straight truck.Type: GrantFiled: May 23, 1988Date of Patent: March 14, 1989Assignee: Thermo King CorporationInventors: Dennis E. Welch, William L. Waldschmidt
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Patent number: 4766736Abstract: An evaporator coil heat exchanger assembly of a refrigeration system, such as a transport refrigeration system, which includes an electrical heating element for rapid defrosting of the evaporator coil with its attendant refrigerant carrying tubes and cooling fins. The electrical heating element is quickly attached to the collective edges of the cooling fins by a plurality of low cost spring retainer clips which have one portion which extends between two closely spaced cooling fins to hook a refrigerant carrying tube, and another portion which holds the heating element against edges of the cooling fins with a spring force. The spring retainer clips may be just as quickly removed should the heating element require replacement. Each spring retainer clip is formed from a single piece of metallic wire having first and second curved end sections, and an intermediate portion which functions both as a spring and as a handle.Type: GrantFiled: October 13, 1987Date of Patent: August 30, 1988Assignee: Thermal King CorporationInventor: William L. Waldschmidt
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Patent number: 4716275Abstract: An evaporator coil heat exchanger assembly of a refrigeration system, such as a transport refrigeration system, which includes an electrical heating element for rapid defrosting of the evaporator coil with its attendant refrigerant carrying tubes and cooling fins. The electrical heating element is quickly attached to the collective edges of the cooling fins by a plurality of low cost spring retainer clips which have one portion which extends between two closely spaced cooling fins to hook a refrigerant carrying tube, and another portion which holds the heating element against edges of the cooling fins with a spring force. The spring retainer clips may be just as quickly removed should the heating element require replacement. Only three curved sections are required to be formed in a single length of wire to form the active elements of the spring retainer clip, and a handle portion is formed in the remaining portion of the single wire length.Type: GrantFiled: November 13, 1986Date of Patent: December 29, 1987Assignee: Thermo King CorporationInventor: William L. Waldschmidt
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Patent number: 4424684Abstract: A container refrigeration unit is provided with a forwardly open condenser pocket 40 in which is located a condenser coil 50 near the upper portion of the pocket and in a generally centered location, the coil being mounted in an inverted disposition and provided with a bottom plate 52 and a front plate 54 with a fan ring opening 56 so that air is drawn into the condenser coil from the top and sides, the remaining U-shaped space in the pocket to the sides and bottom of the condenser being available to accommodate the electric motor compressor 60, the control box 62, an operations recorder 64, and if required a power transformer 66.Type: GrantFiled: January 5, 1982Date of Patent: January 10, 1984Assignee: Thermo King CorporationInventors: William L. Waldschmidt, Donald D. King
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Patent number: D283437Type: GrantFiled: August 1, 1983Date of Patent: April 15, 1986Assignee: Thermo King CorporationInventors: Daniel T. Neimy, Jayaram Seshadri, Harvey E. Danielson, William L. Waldschmidt
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Patent number: D310711Type: GrantFiled: May 23, 1988Date of Patent: September 18, 1990Assignee: Thermo King CorporationInventors: Dennis E. Welch, William L. Waldschmidt
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Patent number: D367524Type: GrantFiled: February 28, 1994Date of Patent: February 27, 1996Assignee: Thermo King CorporationInventors: William L. Waldschmidt, William P. Maxwell, Richard S. Walters