Abstract: The present invention provides an assistive mobility device convertible between a rollator mode and a transport chair mode.

Abstract: The system provides a method and apparatus for sorting and displaying information from a BBS. The system provides a method of sorting and presenting messages from a BBS in a way so that the relationship in message threads can be easily observed and related messages can be identified. The system provides a way to view messages and map message threads in two and three dimensions so that the content of messages can be easily reviewed and the relationship between messages can be seen and followed. The system allows a user to enter into a message thread at any point and to then produce a visualization of the related threads and messages associated with each individual message. The system provides interfaces for either a linear or threaded BBS or even a hybrid BBS that is some combination of linear and threaded.

Abstract: Techniques facilitating increased operational reliability for jib cranes are provided. In one example, a jib crane can comprise a mast, a shaft mechanism, and a rod. The mast can extend vertically from a base structure. The shaft mechanism can be disposed within the mast. The rod can be coupled to a boom arm and can be disposed within the shaft mechanism. Rotation of the rod can facilitate continuous rotation of the boom arm about a longitudinal axis of the rod with respect to the base structure.

Abstract: A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.

Abstract: A vise system is provided to retain a workpiece. In an embodiment, the vise system comprises one or more center vise and one or more end vises. The center vises and end vises are clamped to a table or workbench. The center vise is provided with a front jaw and a rear jaw to retain the center of the work. The end vises are provided with workpiece clamps to retain the ends of the workpiece.

Abstract: An airship comprising an envelope having a shape, a volume, and a frontal area. A lifting gas within the envelope. A propulsion system. A volume change mechanism arranged to change the shape of the envelope, wherein the change in shape of the envelope changes the volume of the envelope, the change in volume of the envelope causes a change in the buoyancy of the airship, and the change in shape of the envelope causes the frontal area of the envelope to change proportionally to the change in volume of the envelope.

Abstract: A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.

Abstract: A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.

Abstract: An identification system includes a radar sensor configured to generate a time-domain or frequency-domain signal representative of electromagnetic waves reflected from one or more objects within a three-dimensional space over a period of time and a computation engine executing on one or more processors. The computation engine is configured to process the time-domain or frequency-domain signal to generate range and velocity data indicating motion by a living subject within the three-dimensional space. The computation engine is further configured to identify, based at least on the range and velocity data indicating the motion by the living subject, the living subject and output an indication of an identity of the living subject.

Abstract: A vise system is provided to retain a workpiece. In an embodiment, the vise system comprises one or more center vise and one or more end vises. The center vises and end vises are clamped to a table or workbench. The center vise is provided with a front jaw and a rear jaw to retain the center of the work. The end vises are provided with workpiece clamps to retain the ends of the workpiece.

Abstract: A seal bore protector for protecting a seal bore of a rotating control device (RCD) is provided. The seal bore protector includes a cylindrical body, a throughbore extending through the cylindrical body, and a sealing element disposed around an external surface of the cylindrical body. The sealing element includes a first sealing ring, a second sealing ring, and a sealed area between the first sealing ring and the second sealing ring. The sealed area is fluidly coupled with a port when the seal bore protector is installed in the rotating control device.

Abstract: A phased array antenna system has at least one trough reflector, each trough reflector having at least one phased array located at a feed point of the reflector, and an array of elements located near to a point equal to one half of a center transmission wavelength. A method of decoding a receive signal includes propagating a transmit signal through a transmit and a receive path of a phased array to generate a coupled signal, digitizing the coupled signal, storing the digitized coupled signal, receiving a signal from a target, and using the digitized coupled signal to decode the signal from the target. A method of modeling the ionosphere includes transmitting measuring pulses from an incoherent scattering radar transmitter, receiving incoherent scatter from the transmitting, and analyzing the incoherent scatter to determine pulse and amplitude of the incoherent scatter to profile electron number density of the ionosphere.

Abstract: A valve stem arrangement for use in an adjustable choke, the valve stem being configured to prevent damage to components of the adjustable choke during downstream overpressure conditions. The valve stem generally connects a valve gate to an actuator for moving the valve gate within the choke. A set of shear screws couple components of the valve stem together. During overpressure conditions, the shear screws shear, permitting retraction of the valve gate towards an open position, thereby relieving loads on various choke components.

Abstract: A seal bore protector for protecting a seal bore of a rotating control device (RCD) is provided. The seal bore protector includes a cylindrical body, a throughbore extending through the cylindrical body, and a sealing element disposed around an external surface of the cylindrical body. The sealing element includes a first sealing ring, a second sealing ring, and a sealed area between the first sealing ring and the second sealing ring. The sealed area is fluidly coupled with a port when the seal bore protector is installed in the rotating control device.

Abstract: A well choke, and an actuation mechanism for the well choke are described. The actuation mechanism includes a linearly translating drive mechanism which is coupled to a valve member drive assembly through a fluid coupling which facilitates a change in the overall length of the actuation mechanism. Fluid in the fluid coupling can be released in response to fluid pressure exerted on the valve member when it is proximate a valve seat of the choke, to achieve this change in length. In some embodiments, the fluid coupling will provide a retained fluid column and the valve member drive assembly will include a piston with in the fluid coupling which is movable from a fully extended to a compressed, by the release of fluid from the coupling in response to pressure in the chamber reaching a threshold level.

Abstract: A rotating control device (RCD) sensor assembly is provided. The rotating control device sensor assembly includes an emitter disposed on a rotational component of a rotating control device, wherein the emitter emanates a detectable signal field, a cap coupled to the rotational component to form a volume between the cap and the rotational component, wherein the emitter is enclosed within the volume, and wherein the cap is made of a transmissive material, and a sensor that detects the signal field through the cap as the emitter passes within a proximity of the sensor.

Abstract: A well choke, and an actuation mechanism for the well choke are described. The actuation mechanism includes a linearly translating drive mechanism which is coupled to a valve member drive assembly through a fluid coupling which facilitates a change in the overall length of the actuation mechanism. Fluid in the fluid coupling can be released in response to fluid pressure exerted on the valve member when it is proximate a valve seat of the choke, to achieve this change in length. In some embodiments, the fluid coupling will provide a retained fluid column and the valve member drive assembly will include a piston with in the fluid coupling which is movable from a fully extended to a compressed, by the release of fluid from the coupling in response to pressure in the chamber reaching a threshold level.

Abstract: A portable RFID (Radio Frequency Identification) tag includes one or more sensors. Each sensor measures a condition of an environment within which the RFID tag is disposed. Circuitry obtains data from measurements provided by each sensor. A transceiver modulates a radio frequency (RF) signal carrying the obtained data. An antenna, electrically coupled to the transceiver, transmits the RF signal. The circuitry, transceiver, and antenna are potted in their entirety in a thermosetting plastic epoxy for purposes of enduring extreme environmental conditions. The one or more sensors can include a temperature probe. A portion of this temperature probe can serve as the antenna.

Abstract: A portable paint station that includes a work table and a pair of legs that are positionable in a retracted position and an extended position. In one form, the paint station provides a work surface that may be selectively positioned at two distinct heights. In another form, the paint station provides a work surface with a roller tray recess that may be selectively covered to resist the formation of a skin on paint that is located in the recess. In a further form, the paint station provides a work table with a pair of legs. At least one set of the legs has a handle aperture that may be employed to hand carry the paint station on its side. In yet another form, the paint station includes a roller tray assembly that facilitates the short-term storage of a paint roller that is loaded with paint.