Abstract: In accordance with an aspect of the present disclosure, a tissue extraction device may include a bag having an interior and a plurality of cutters elements extending along an interior surface of the bag. The cutters can be offset to facilitate collapsing of the bag prior to introducing the bag into a patient.

Abstract: A steering axle drive assembly includes a steering axle having opposite ends, a wheel pivotally connected with each steering axle end, and a control mechanism. The wheels are operated by the control mechanism for rotation about a vertical axis and a horizontal axis. When the axle is connected with a vehicle, the control mechanism controls the steering axle wheels independent of other wheels of the vehicle, such as the main drive wheels, to steer and drive the vehicle from an origin in any direction without passing through the origin. Preferably, a motor or linear actuator controls the rotation of the steering axle wheels. The steering axle drive assembly can be further improved by including an angled axle.

Abstract: A steering axle drive assembly includes a steering axle having opposite ends, a wheel pivotally connected with each steering axle end, and a control mechanism. The wheels are operated by the control mechanism for rotation about a vertical axis and a horizontal axis. When the axle is connected with a vehicle, the control mechanism controls the steering axle wheels independent of other wheels of the vehicle, such as the main drive wheels, to steer and drive the vehicle from an origin in any direction without passing through the origin. Preferably, a motor or linear actuator controls the rotation of the steering axle wheels. The steering axle drive assembly can be further improved by including an angled axle.

Abstract: A steering linkage for a vehicle includes a cross-linked pivot assembly which includes a first connector configured for connection with the axle, first and second links, and a second connector configured for connection with a wheel. The first connector has a first end with which a first end of the first link is pivotally connected and a second end with which a first end of the second link is pivotally connected. The second connector has first and second ends and is arranged in spaced relation from and at an angle relative to the first connector. The first end of the second connector is arranged closer to the second end of the first connector than is the second end of the second connector. A second end of the first link is pivotally connected with the first end of the second connector and a second end of the second link is pivotally connected with the second end of the second connector.

Abstract: A steering linkage for a vehicle includes a cross-linked pivot assembly which includes a first connector configured for connection with the axle, first and second links, and a second connector configured for connection with a wheel. The first connector has a first end with which a first end of the first link is pivotally connected and a second end with which a first end of the second link is pivotally connected. The second connector has first and second ends and is arranged in spaced relation from and at an angle relative to the first connector. The first end of the second connector is arranged closer to the second end of the first connector than is the second end of the second connector. A second end of the first link is pivotally connected with the first end of the second connector and a second end of the second link is pivotally connected with the second end of the second connector.

Abstract: A steering axle drive assembly includes a steering axle having opposite ends, a wheel pivotally connected with each steering axle end, and a control mechanism. The wheels are operated by the control mechanism for rotation about a vertical axis and a horizontal axis. When the axle is connected with a vehicle, the control mechanism controls the steering axle wheels independent of other wheels of the vehicle, such as the main drive wheels, to steer and drive the vehicle from an origin in any direction without passing through the origin. Preferably, a motor or linear actuator controls the rotation of the steering axle wheels. The steering axle drive assembly can be further improved by including an angled axle.

Abstract: An example method of facilitating communication between a mobile device positioned within an internal network and a target peer includes intercepting, at a proxy executing on a mobile device, a communication to initiate a real-time communication connection with a target peer. The mobile device is coupled to a cellular network, and the internal network is separated from one or more external networks by network address translation (NAT). The example method also includes determining whether the target peer is reachable via the cellular network. The example method further includes when it is determined that the target peer is reachable via the cellular network, sending over the cellular network to the target peer a request to communicate in a first protocol.

Abstract: A rotary device is disclosed that includes a rotor comprising a main body and plurality of protrusions extending radially from the main body. At least a pair of voids are provided adjacent to each other in the main body of the rotor between each adjacent pair of the plurality of protrusions, and each pair of voids is spaced from each adjacent pair of voids by a distance greater than that between each adjacent void in each pair of voids.

Abstract: A first rotor configured to rotate adjacent to a second rotor is disclosed. The second rotor includes a circular main body with a first axis of rotation and a vane extending radially from the main body. The first rotor includes a first curved surface that corresponds to a curve swept at a constant radius about a second axis of rotation, a second curved surface that corresponds to a curve swept by a leading edge of the vane when the second rotor is simultaneously rotated about the first axis of rotation and the second axis of rotation, a third curved surface that corresponds to a curve swept by a trailing edge of the vane when the second rotor is simultaneously rotated about the first axis of rotation and the second axis of rotation, and a vane-receiving groove disposed between the second curved surface and the third curved surface.

Abstract: An example method of facilitating communication between a mobile device positioned within an internal network and a target peer includes intercepting, at a proxy executing on a mobile device, a communication to initiate a real-time communication connection with a target peer. The mobile device is coupled to a cellular network, and the internal network is separated from one or more external networks by network address translation (NAT). The example method also includes determining whether the target peer is reachable via the cellular network. The example method further includes when it is determined that the target peer is reachable via the cellular network, sending over the cellular network to the target peer a request to communicate in a first protocol.

Abstract: An example method and system for a mobile proxy for WebRTC interoperability is discussed. The method may include receiving a DTLS security handshake from a WebRTC API of a browser endpoint, negotiating an encryption mechanism through a signaling protocol with a non-WebRTC enabled endpoint, completing, using one or more hardware processors, the DTLS security handshake with the WebRTC API of the browser endpoint based on the encryption mechanism, and exchanging, through a mobile proxy, first media traffic from the browser endpoint with the non-WebRTC enabled endpoint and second media traffic from the non-WebRTC enabled endpoint with the browser endpoint. In various embodiments, if the non-WebRTC endpoint uses SDES for negotiation of the encryption mechanism, the encryption mechanism may include SDES-conveyed key information.

Abstract: A fixed vane positive displacement rotary device is disclosed that includes a primary rotor and one or more scavenging rotors rotatably disposed in a rotor encasement. The primary rotor includes a plurality of protrusions. And each of the scavenging rotors includes a first curved surface that is configured to move adjacent to the primary rotor between the protrusions as the primary rotor and scavenging rotors rotate, a protrusion-receiving groove extending that is configured to receive one of the plurality of protrusions therein so that at least a tip of that protrusion moves adjacent to the protrusion-receiving groove as the primary rotor and scavenging rotors rotate, and a second curved surface and a third curved surface extending away from a center of the protrusion-receiving groove on opposing sides of the protrusion-receiving groove that are configured to move adjacent to a leading side and a trailing side of the one protrusion, respectively.

Abstract: A four wheel drive system for bilaterally symmetric vehicles has separate controlled drive speed and direction for each wheel. Each drive system is operable to independently drive each wheel. The rear wheels of the vehicle are steering wheels which are connected with the vehicle frame for independent rotation about a vertical axis. Steering and driving of the wheels is controlled by a controller. The combination of controlled steering for the rear wheels through many degrees about their vertical axes and individual power to all four wheels provides the vehicle with a zero turning radius for improved mobility as well as improved traction on unstable surfaces.

Abstract: A fixed vane positive displacement rotary device is disclosed that includes a primary rotor and one or more scavenging rotors rotatably disposed in a rotor encasement. The primary rotor includes a plurality of protrusions. And each of the scavenging rotors includes a first curved surface that is configured to move adjacent to the primary rotor between the protrusions as the primary rotor and scavenging rotors rotate, a protrusion-receiving groove extending that is configured to receive one of the plurality of protrusions therein so that at least a tip of that protrusion moves adjacent to the protrusion-receiving groove as the primary rotor and scavenging rotors rotate, and a second curved surface and a third curved surface extending away from a center of the protrusion-receiving groove on opposing sides of the protrusion-receiving groove that are configured to move adjacent to a leading side and a trailing side of the one protrusion, respectively.

Abstract: A motor vehicle transmission includes a power splitter connected with the vehicle engine and having two outputs. A differential and a clutch are connected with the outputs of the splitter. Separate gearboxes including alternating sequential gear mechanisms are connected with the differential and clutch. The differential and clutch are independently operated under control of an electronic control unit to provide continuous flow of power from the engine to the gearboxes which may be simultaneously operated.

Abstract: A four wheel drive system for bilaterally symmetric vehicles is characterized by separate drive systems for the front and rear wheels. Each drive system is operable to independently drive each wheel. The rear wheels of the vehicle are steering wheels which are connected with the vehicle frame for independent rotation about a vertical axis. Steering and driving of the wheels is controlled by a controller. The combination of independent steering for the rear wheels and independent powering of all four wheels provides the vehicle with a zero turning radius for improved mobility as well as improved traction on unstable surfaces.

Abstract: A motor vehicle transmission includes a power splitter connected with the vehicle engine and two differential clutches connected with the outputs of the splitter. Separate gearboxes including alternating sequential gear mechanisms are arranged in each gearbox. The clutches are independently operated under control of an electronic control unit to provide continuous flow of power from the engine to the gearboxes which may be simultaneously operated. The clutches are driven by motors, respectively, under control of the electronic control unit.

Abstract: A process/apparatus is disclosed for continuously separating a liquid medium comprising diluent and unreacted monomers from a polymerization effluent comprising diluent, unreacted monomers and polymer solids, comprising a continuous discharge of the polymerization effluent from a slurry reactor through a discharge valve and transfer conduit into a first intermediate pressure flash tank with a conical bottom defined by substantially straight sides inclined at an angle to that of horizontal equal to or greater than the angle of slide of the slurry/polymer solids and an exit seal chamber of such diameter (d) and length (l) as to maintain a desired volume of concentrated polymer solids/slurry in the exit seal chamber such as to form a pressure seal while continuously discharging a plug flow of concentrated polymer solids/slurry bottom product of the first flash tank from the exit seal chamber through a seal chamber exit reducer with inclined sides defined by substantially straight sides inclined at an angle to th

Abstract: A method of processing multi-leg calls in a communication network is provided. The method comprises: receiving a call for a user at a first entity in the network; establishing a first call leg to a second entity; generating a first charging data record with at least one field, wherein the field contains a charging identifier for the first call leg; receiving a response from the second entity; establishing a second call leg to a third entity; generating a second charging data record with at least two fields, wherein the first field contains a charging identifier for the second call leg and the second field contains a copy of the charging identifier for the first call leg; and sending the charging data records to a third entity.

Abstract: A four wheel drive system for bilaterally symmetric vehicles is characterized by separate drive systems for the front and rear wheels. Each drive system is operable to independently drive each wheel. The rear wheels of the vehicle are steering wheels which are connected with the vehicle frame for independent rotation about a vertical axis. Steering and driving of the wheels is controlled by a controller. The combination of independent steering for the rear wheels and independent powering of all four wheels provides the vehicle with a zero turning radius for improved mobility as well as improved traction on unstable surfaces.