Justin A. Aborn - Hingham MA, US Karl E. Freter - Wheaton IL, US Sanjay S. Jhawar - Chicago IL, US Mats A. Samuelsson - Norfolk MA, US Bruce M. Wiatrak - Bolingbrook IL, US Andre De Verteuil - Toronto, CA Ivan Dean Bogdanovic - Brookline MA, US
A telephone system supports communication with user devices over both a cellular radio network as well as over an Internet Protocol (IP) network, and enables roaming and active call handoff between cellular and IP domains. Approaches to detecting presence of a user near a suitable IP network are used in controlling transitions between the domains, for example, enabling automatic transitions between domains, and delivery of calls to a mobile user to data network devices in the vicinity of the user.
Methods and apparatus for detecting a change in demand for server resources across a load-bearing system having one or more content servers hosting identical content, the load-bearing system being connected to a network of content servers; and automatically modifying the number of content servers on the load-bearing system in response to the change in demand.
Eric D. Ingersoll - Cambridge MA, US Justin A. Aborn - Hingham MA, US Stephen M. Chomyszak - Attleboro MA, US
Assignee:
General Compression, Inc. - Newton MA
International Classification:
F16D 31/02
US Classification:
60408
Abstract:
Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one pressure vessel defining an interior region for retaining at least one of a volume of liquid or a volume of gas and an actuator coupled to and in fluid communication with the pressure vessel. The actuator can have a first mode of operation in which a volume of liquid disposed within the pressure vessel is moved to compress and move gas out of the pressure vessel. The actuator can have a second mode of operation in which a volume of liquid disposed within the pressure vessel is moved by an expanding gas entering the pressure vessel. The system can further include a heat transfer device configured to transfer heat to or from the at least one of a volume of liquid or a volume of gas retained by the pressure vessel.
System And Methods For Optimizing Efficiency Of A Hydraulically Actuated System
Eric D. Ingersoll - Cambridge MA, US Justin A. Aborn - Hingham MA, US Matthew Blieske - Boston MA, US
Assignee:
General Compression, Inc. - Newton MA
International Classification:
F15B 11/16 F04B 35/02
US Classification:
60425, 91519, 417396, 417403
Abstract:
Systems and methods for efficiently operating a hydraulically actuated device/system are described herein. For example, systems and methods for efficiently operating a gas compression and expansion energy storage system are disclosed herein. Systems and methods are provided for controlling and operating the hydraulic actuators used within a hydraulically actuated device/system, such as, for example, a gas compression and/or expansion energy system, within a desired efficiency range of the hydraulic pump(s)/motor(s) used to supply or receive pressurized hydraulic fluid to or from the hydraulic actuators. In such a system, a variety of different operating regimes can be used depending on the desired output gas pressure and the desired stored pressure of the compressed gas. Hydraulic cylinders used to drive working pistons within the system can be selectively actuated to achieve varying force outputs to incrementally increase the gas pressure within the system for a given cycle.
Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one pressure vessel defining an interior region for retaining at least one of a volume of liquid or a volume of gas and an actuator coupled to and in fluid communication with the pressure vessel. The actuator can have a first mode of operation in which a volume of liquid disposed within the pressure vessel is moved to compress and move gas out of the pressure vessel. The actuator can have a second mode of operation in which a volume of liquid disposed within the pressure vessel is moved by an expanding gas entering the pressure vessel. The system can further include a heat transfer device configured to transfer heat to or from the at least one of a volume of liquid or a volume of gas retained by the pressure vessel.
Eric D. Ingersoll - Cambridge MA, US Justin A. Aborn - Hingham MA, US
Assignee:
General Compression, Inc. - Newton MA
International Classification:
F01B 29/10
US Classification:
60512, 60515, 91 4 A
Abstract:
Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one pressure vessel defining an interior region for retaining at least one of a volume of liquid or a volume of gas and an actuator coupled to and in fluid communication with the pressure vessel. The actuator can have a first mode of operation in which a volume of liquid disposed within the pressure vessel is moved to compress and move gas out of the pressure vessel. The actuator can have a second mode of operation in which a volume of liquid disposed within the pressure vessel is moved by an expanding gas entering the pressure vessel. The system can further include a heat transfer device configured to transfer heat to or from the at least one of a volume of liquid or a volume of gas retained by the pressure vessel.
Methods And Devices For Optimizing Heat Transfer Within A Compression And/Or Expansion Device
Eric D. Ingersoll - Cambridge MA, US Justin A. Aborn - Hingham MA, US Matthew Blieske - Boston MA, US Iain Ridley - Arlington MA, US
Assignee:
General Compression, Inc. - Newton MA
International Classification:
F04F 99/00 F01B 31/08 F01B 29/10
US Classification:
417 92, 417 53, 92144
Abstract:
Systems, methods and devices for optimizing heat transfer within a device or system used to compress and/or expand a gas, such as air, are described herein. For example, systems, methods and devices for optimizing the heat transfer within an air compression and expansion energy storage system are described herein. A compressor and/or expander device can include one or more of various embodiments of a heat transfer element that can be disposed within an interior of a cylinder or pressure vessel used in the compression and/or expansion of a gas, such as air. Such devices can include hydraulic and/or pneumatic actuators to move a fluid (e. g. , liquid or gas) within the cylinder or pressure vessel. The heat transfer element can be used to remove heat energy generated during a compression and/or expansion process.
Systems And Methods For Compressing And/Or Expanding A Gas Utilizing A Bi-Directional Piston And Hydraulic Actuator
Eric D. Ingersoll - Cambridge MA, US Justin A. Aborn - Hingham MA, US Matthew Blieske - Francestown NH, US
Assignee:
General Compression, Inc. - Newton MA
International Classification:
F16D 31/02 F04B 25/00
US Classification:
60371, 60408, 60409, 417267
Abstract:
Systems, methods and devices for optimizing bi-directional piston movement within a device or system used to compress and/or expand a gas, such as air, are described herein. In some embodiments, a compressed air device and/or system can include a first pneumatic cylinder, a second pneumatic cylinder, a hydraulic actuator, and a hydraulic controller. The first pneumatic cylinder has a first working piston disposed therein for reciprocating movement in the first pneumatic cylinder and the hydraulic actuator is coupled to the first working piston. The second pneumatic cylinder has a second working piston disposed therein for reciprocating movement in the second pneumatic cylinder. The hydraulic controller is fluidically coupleable to the hydraulic actuator and is operable in a compression mode and an expansion mode.
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