8139 results about "Push pull" patented technology

QoS is built into a peer network within existing Internet infrastructure itself lacking QoS, by enabling a network peer to continuously discern the network's ability to deliver to that peer a particular Content Object (distributed in groups of component Packages among neighboring VOD peers) within predetermined times. Content Objects are divided into groups of component Packages and distributed to Clusters of neighboring network peers, enhancing QoS upon subsequent retrieval. Tracking Files (lists of network peers storing Package groups) and Tracking Indexes (lists of network peers storing Tracking Files) are generated to facilitate “on demand” Content Objects retrieval. Dynamically monitoring network traffic (including VOD functionality, bandwidth and reliability) creates “distributed closed-loop feedback,” and in response, attributes of individual network peers (e.g., Trust Level and membership within a particular Cluster) are modified, and “content balancing” functions performed (e.g., redistribution of Package groups among network peers) enables maintaining high QoS.

A soft-switched single-phase quasi-single-stage (QSS) bi-directional inverter / charger converts AC-DC or DC-AC. The inverter / charger comprises a push-pull inverter / rectifier on the dc-side, an isolation transformer which provides ohmic isolation and voltage scaling, two full-bridges on the ac side in cascade, a voltage clamp branch comprising a capacitive energy storage element in series with an active switch with its anti-parallel diode, a passive filter at the ac side to smooth out the high frequency switching voltage ripple at the output, and a corresponding PWM scheme to seamlessly control the converter to operate in all four quadrant operation modes in the output voltage and output current plane, and is capable of converting power in both directions.

Provided is a current-source push-pull DC-DC converter using an active clamp circuit for reusing energy of leakage inductances by not only diodes on a secondary side of a transformer being zero-current switched using a series-resonant full-wave rectifier, but also the active clamp circuit on a primary side of the transformer, which provides a discharge path of the energy stored in the leakage inductances, increases power conversion efficiency even for a wide input voltage range and reduces a switch voltage stress as compared to a conventional current-source push-pull circuit by operating even for a duty ratio below 0.5 by flowing a current of an input inductor through capacitors of the active clamp circuit when both main switches are off.

A low-profile, embolic protection device for collecting particulate debris in a body lumen, wherein an embolic filter is utilized that is expandable and collapsible by push-pull action. A filter first end is axially secured to an elongate inner member and a filter second end is attached to a distal tip of an outer tubular member. The filter is delivered to a treatment site inverted within a distal portion of the outer tubular member. The elongate inner member is slidable within the outer shaft, such that relative longitudinal movement between the elongate inner member and outer shaft reconfigures the filter between its inverted and everted configurations, as well as its expanded and collapsed configurations.

Voltage regulation, transient response and efficiency of a voltage regulator module (VRM) is improved where short duty cycles are necessitated by large differentials of input and output voltage by including at least one clamping of a tap of an inductance in series with an output of each of a plurality of parallel branches or phases which are switched in a complementary fashion or providing coupling between inductors of respective phases. Such coupling between inductors is achieved in a small module with an integrated magnetic structure. Reduced component counts are achieved while deriving built-in input and output filters. Principals of the invention can be extended to isolation applications and push-pull forward converts, in particular. A lossless clamping circuit is also provided allowing spike currents to be suppressed while returning power to the output of the VRM.

A material handling apparatus for mounting on a support structure. The material handling apparatus comprises a telescopic riser portion coupled to the support structure. A telescopic boom portion is coupled to the riser portion. A telescopic jib portion is coupled to the riser portion. A hook is coupled to the jib portion. A control apparatus is coupled to each of the riser, boom, and jib portions. Wherein, each of the telescopic portions can be independently, selectively moved in a push-pull mode to manipulate material.

An electrical plug assembly includes a housing, a latch and an actuator. The housing extends along a longitudinal axis and is configured to mate with a receptacle assembly. The latch is movably coupled to the housing and has a latching end configured to latch and unlatch the receptacle assembly. The actuator is interconnected with the housing and the latch. The actuator is movable in both a push direction and a pull direction. The actuator raises the latching end when the actuator is pushed along the longitudinal axis in the push direction. The actuator also raises the latching end when the actuator is pulled along the pull direction.

An integrated magnetic assembly that allows the primary and secondary windings of a transformer and a separate inductor winding to be integrated on a unitary magnetic structure is disclosed. The unitary magnetic structure includes first, second, and third legs that are physically connected and magnetically coupled. The primary and secondary windings of the transformer can be formed on the third leg of the unitary magnetic structure. Alternatively, the primary and secondary windings can be split between the first and second legs. Thus, the primary winding includes first and second primary windings disposed on the first and second legs and the secondary winding includes first and second secondary windings disposed on the first and second legs. The inductor winding may also be formed either on the third leg or it may split into first and second inductor windings and disposed on the first and second legs. In addition, one or more legs may include an energy storage component such as an air gap. This integration of the primary and secondary windings and the inductor winding on the unitary magnetic structure advantageously decouples the inductor function from the transformer function and allows the more optimal design of both the inductor and the transformer. The unitary magnetic structure may be coupled to a full bridge, a half bridge, or a push pull voltage input source to form a DC—DC converter.

A recording disc and recorded information reproducing apparatus and method for immediately starting reproduction of information when a push-pull based tracking control is employed to reproduce recorded information from the recording disc. The recording disc comprises an information data area for recording recording marks which carry information data in columns, and a control data area for recording identification information indicative of a recording pattern of the recording marks in the information data area.

A connector assembly configured to engage a mating connector. The connector assembly includes a plug body that has loading and mating ends and a central axis extending therebetween. The mating end is configured to be inserted into a cavity of the mating connector to establish at least one of communicative and power connections. The plug body has an outer surface that surrounds and faces away from the central axis. The connector assembly also includes a ring that is slidably mounted over the plug body. The ring is configured to slide along the outer surface of the plug body in an axial direction between withdrawn and locked positions. The connector assembly also includes a sleeve member that is slidably mounted over the plug body and the ring. The sleeve member includes a plurality of fingers that extend toward the mating end and are biased toward the outer surface of the plug body. The ring is configured to engage the fingers and the fingers are configured to flex away and engage the mating connector.

An abdominal muscle exercise machine of a push-pull type that includes an elbow sliding support plate with handle bars; a knee sliding support plate with swiveling knee cups; elastic resistance bands attached between the elbow and knee support plates and the end stabilizer bars; parallel sets of shafts at the front and rear end of the machine connected to the sliding support plates; a center rod with support legs to raise it off the ground; quick release clamps attached to the parallel shafts; and end support rods with end caps at the front and rear end of the machine. The machine has a dual incline angle for both the elbows and knees to pull and push against during exercise and may be adjusted in range of motion using quick release clamps. The machine may also be easily folded closed for storing in a compact space.

The long nose manipulatable catheter includes a main lumen, a wire lumen with a push-pull wire therethrough, and a flexible joint region. The catheter section includes a control including a handle and a wire control member engaging the push-pull wire for manipulating the flexible joint region. The push-pull wire may be tapered, having a proximal portion of a first diameter and a smaller diameter distal portion. A coil may be placed around the smaller diameter to prevent buckling of the smaller diameter portion. A strapping coil may also disposed around the outside of the catheter, and an outer covering may be disposed around the strapping coil. An outer covering of a mesh may also be disposed around the distal tip of the catheter.

An electronic communications device 102 can be provided with one or more different electronic connectors 104 and 106 for accepting varying data cards 108 or 110. A slot 138 or 140 in the electronic communications device can receive the data cards. The connector 106 can comprise of a push-push connector 168, a push-pull connector 170 or an elongated card access tray 182. The versatile single connector can have a first data card-receiving cavity 142 for receiving a data card 108, such as a nano-SIM 4th form-factor (4FF) card, and a second data card-receiving cavity 144 for receiving a data card 110, such as a microSD (uSD) card. The versatile single connector can have portions of the cavities 142 and 144 overlapping each other to provide a common minimal connector footprint 150 comprising of a single shared data card opening 138 or 140 for receiving, accepting, connecting and detecting only one of the data cards at a time in the device. Elements in the connector, device, or tray geometry can be of a size and shape to bias the data card and to prevent more than one data card from being inserted at a time into the single connector.

To provide an electrostatic ultrasonic transducer arranged so that sound wave is not radiated from the rear surface while utilizing advantages of a push-pull type electrostatic ultrasonic transducer. A push-pull type electrostatic ultrasonic transducer includes a vibrating film 11 having a conductive layer and a pair of fixed electrodes 12, 13 provided facing respective surfaces of the vibrating film, and applies a direct current bias voltage to the conductive layer of the vibrating film and applies an alternating current signal between the pair of fixed electrodes so as to allow the vibrating film to generate sound wave and outputting the sound wave generated from the vibrating film from two sound wave output surfaces via through holes provided in the respective pair of fixed electrodes. Plural through holes are provided in the front-side fixed electrode that sandwiches the vibrating film and through holes having the same shapes are provided in the rear-side fixed electrode in positions opposed to the respective through holes provided in the front-side fixed electrode, and a sound absorbing material 16 is provided facing the rear-side fixed electrode.

A medical system comprises a medical probe including an elongated probe body, a lumen extending within the probe body, an axially flexible section, and a push-pull rod slidably disposed within the lumen. The system comprises a ditherer mechanically coupled to the rod for cyclically displacing it axially back and forth within the lumen, such that the ends of the probe body are axially displaced relative to each other via the axially flexible section. The system further comprises a sensor for sensing a force axially applied to the distal end of the probe body. A method comprises introducing a medical probe into a patient, axially dithering the distal end of the medical probe back and forth relative to the proximal end of the medical probe, and sensing a force applied between tissue of the patient and the distal end of the medical probe while the distal end is axially dithered.

In general, the purpose of the probe system is to provide improved rapid field methods using re-designed direct push technology (DPT) and “push-pull testing” concepts to evaluate in situ chemical, biochemical, surfactant, adsorptive media, and leaching and fixation remediation technologies for hazardous subsurface contaminant(s). The probe system and methods described here when applied to a hazardous waste site being considered for in situ remediation of contaminants (organic or inorganic) by the listed treatment technologies will yield information that greatly reduces the uncertainty with regards to treatment effectiveness for the in situ soil, groundwater, and contaminant(s) conditions affecting dosage requirements and reaction rate(s) for various reactants. The probe system described here is multi-purpose in that it was designed: 1) to measure the relative permeability of the subsurface soil and groundwater to a liquid or gas ejectant, 2) to recover soil gas, soil, or groundwater samples for contaminant analyses, 3) to measure the chemical dosage and reaction, dissolution, adsorption, desorption, leaching, or fixation rate of a reactant such as a chemical or biochemical oxidant, metallic or bimetallic dehalogenating agent, surfactant or emulsifier solution, adsorbent media regenerant, leaching or fixation reagent that is injected into the matrix and withdrawn during a push-pull test, 4) to perform combinations of the above, 5) to measure the in situ adsorption capacity of adsorbent media and subsequently measure the effectiveness of regenerant(s) for the adsorbent media, and (6) to measure the effectiveness of a treated soil column for inorganic contaminant(s) leaching or fixation. In addition to being an in situ remedial alternatives evaluation tool, the probe system can be used as a reactant(s) delivery device after the specific remedial technology has been selected.

Voltage regulation, transient response and efficiency of a voltage regulator module (VRM) is improved where short duty cycles are necessitated by large differentials of input and output voltage by including at least one clamping of a tap of an inductance in series with an output of each of a plurality of parallel branches or phases which are switched in a complementary fashion or providing coupling between inductors of respective phases. Such coupling between inductors is achieved in a small module with an integrated magnetic structure. Reduced component counts are achieved while deriving built-in input and output filters. Principals of the invention can be extended to isolation applications and push-pull forward converts, in particular. A lossless clamping circuit is also provided allowing spike currents to be suppressed while returning power to the output of the VRM.

An amplifier is operable in push-pull mode, single-ended mode, or a composite mode that is an intermediate between single-ended and Push-pull modes. Moreover, at least one output device may be configured to operate using a high performance AC servo loop that functions the output device as a current source. Still further, a control input driver stage is provided that is capable of supplying sufficient AC current to overcome Miller capacitance induced roll off within the intended frequency spectrum of triode vacuum tubes. Additionally, methods are provided to substantially null or selectively introduce DC magnetic bias within the output transformer core. Still further, a solid state power supply stage provides substantial AC hum reduction during single-ended operation and simultaneously provides output voltage load regulation attributes similar to traditional vacuum tube rectifier circuits.

An apparatus and method for extracting soiled cleaning solution from carpets and other surfaces utilizing a low-profile pick-up head is disclosed. The apparatus includes a vacuum chamber or enclosed space positioned in a fluid recovery device to provide a uniform vacuum along the entire width of the device. Also disclosed is a low-profile push-pull fluid recovery device which includes a positive pressure chamber and a vacuum chamber in the push-pull head to distribute positive and vacuum pressures, respectively, along the width of the push-pull head. Methods for using such pick-up heads are also disclosed.

The invention relates to a control method and a controller for a DC-DC converter, such as a synchronous Buck converter, which exploits the principle of capacitor charge balance to allow the converter to recover from a positive and / or negative load current step in the shortest achievable time, with the lowest possible voltage undershoot / overshoot. The control method may be implemented by either an analog or a digital circuit. The controller may be integrated with existing controller schemes (such as voltage-mode controllers) to provide superior dynamic performance during large-signal transient conditions while providing stable operation during steady state conditions. The invention also relates to a method and a modification of a DC-DC converter topology that comprises connecting a controlled current source between an input terminal and an output terminal of the DC-DC converter; detecting a load current step to a new load current; modifying a duty cycle of the DC-DC converter; and modifying current through a parallel output capacitor of the DC-DC converter by controlling current of the current source. The methods and circuits provided herein are applicable to Buck converters and Buck-derived converters such as forward, push-pull, half-bridge, and full-bridge converters.

A combined focus and reticle illumination system for a riflescope which uses a single, dual functioning turn knob mounted on the scope turret for focusing and activating and deactivating the illuminated reticle. During use, the turn knob is rotated to adjust the relative position of a sliding focusing cell assembly located inside the scope body in front of the erector tube. The reticle, attached to the proximal end of the erector tube, includes a side mounted LED. The turn knob has a push-pull movement and a battery located therein that disconnects and connects, respectively, the electric circuit. The sliding focusing cell includes a rigid outer housing that is resistant to bending and a rear sliding lens cell that is biased in a rearward direction to be self-centering during recoil. Wires extend from the turn knob to the LED along the scope sidewalls and are designed to preclude twisting.

A piezoelectric actuated suspension with passive damping is disclosed for precision positioning of hard disk drive while reducing undesired shock vibrations. Along the longitudinal axis of an etched suspension, two piezoelectric actuators dispose near the base plate to provide a push-pull motion. The actuators have two main portions. The first portion is piezoelectric elements to provide active positioning. The second portion is viscoelastic damping layers underneath the piezoelectric elements for passive damping. The complementary parts such as stiff edge elements and optional soft boundary covers are used to enhance the actuating abilities of the actuators and prevent any contaminants of the viscoelastic layers from going into the clean sealed chamber of the hard disk drive, respectively. The present invention further relates to a dual-stage servo system in a hard disk drive for fine positioning of the read / write head and better shock resistance via the piezoelectric actuated suspension with passive damping.

A hands-free breast pump that includes a balanced push-pull reciprocating drive system that applies pumping force to a vacuum chamber formed by a breast interface cup during inward and outward pump strokes. The breast pump includes a breast cup that has a resilient bellows structure that partially collapses the volume of the vacuum chamber during the inward stroke and recovers the volume of the vacuum chamber during the outward stroke. The pump mechanism includes a cam drive system that translates rotary electric motor power into reciprocating linear action of an actuator arm that drives the bellows structure. The bellows structure acts like a spring that charges (resists the pump force) during the inward stroke and discharges (assists the pump force) during the outward stroke, and the shape of the cam track is designed to produce a desired operating profile for the pump.