Shanghai Sterling Motion Technology Co., Ltd.

General Electric Company

I-trust Better Life Corp

Asicotech Company Limited

Yanjun Zhang

Juan Antonio Sabate

Liang Huang

Rixin Lai

Wesley Michael Skeffington

Song Chi

Yimeng Shi

Xiaoxiang Zhang

Quan Liu

Jianming Qiu

Zhirong Gao

A chromatographic apparatus for online enrichment of trace and ultra-trace components and an analytical method using the same. The apparatus includes an injection system, a vaporizing chamber, an enrichment system, a thermal box, a sample collection system, a focusing trap, a chromatographic analytical column system, a detector and an electronic control system. The method includes steps of sample enrichment, thermal desorption and back flushing, which are performed through a combination of a four-way valve and an electronic switch valve box.

Chromatographic apparatus for online enrichment of trace and ultra-trace components and method for analyzing trace and ultra-trace components using same

The adjustable headrest mechanism for a chair comprises a pair of sliding rails; an upper driving rod and a lower driving rod, the upper driving rod being attached to the sliding rails and the lower driving rod being attached to a back frame of the chair; and a headrest actuator pivotally connected between the upper driving rod and the lower driving rod for operably driving the upper driving rod to move between a first position and a second position, thereby driving the sliding rails to pivotally move in an upward direction or a downward direction relative to the lower driving rod. When the upper driving rod is in the first position, the sliding rails is in a complete close state. When the upper driving rod is in the second position, the sliding rails is in a complete open state.

Adjustable headrest mechanism and chair having same

A power operation system used in a chair includes a power operation system. The power operation system includes a power headrest operation system, including: a headrest board; a pair of headrest posts; a pair of headrest support posts; a headrest axis of rotation; a first mounting bracket and a second mounting bracket; a headrest actuator; a first pulling mechanism; and a first stopping mechanism. When the headrest actuator drives in the headrest forward direction, the headrest actuator rotates, through rotation of the headrest axis of rotation, the headrest board from a closed headrest position to an open headrest position. When the headrest actuator drives in the headrest backward direction, the first pulling mechanism pulls the headrest board from the open headrest position to the closed headrest position, the first stopping mechanism prevents the headrest board from rotating any further once the headrest board arrives at the closed headrest position.

Power operation system and chair having same

A gradient amplifier system, includes: a power stage comprising a plurality of bridge amplifiers, each operates at a first switching frequency; a gradient coil coupled to the power stage and configured to produce a magnetic field proportional to a coil current signal supplied by the power stage; a controller stage coupled to an input terminal of the power stage and configured to: generate a pulse width modulated gate signal based on the coil current signal and a reference current signal, wherein the pulse width modulated gate signal is generated at a second switching frequency when a slew rate associated with the reference current signal is below a threshold rate for at least a first time period; and apply the pulse width modulated gate signal to the power stage for changing an operating frequency of each of the plurality of bridge amplifiers from the first to the second switching frequency.

System and method to reduce power loss in a gradient amplifier

An actuator. In one embodiment, the actuator comprises a reversible electric motor having a stator having a housing, a rotor housed in the housing of the stator, and a shaft having a forward portion and a rearward portion extending oppositely and coaxially from the rotor, respectively; a fan member coaxially attached to the forward portion or the rearward portion of the motor shaft such that the fan member is operable simultaneously with the rotor of the reversible electric motor; and an electromagnetic brake movable between a first position and a second position, positioned in relation to the fan member such that when the electromagnetic brake is in the first position, the fan member is rotatable with the rotor of the reversible electric motor, and when the electromagnetic brake is in the second position, the fan member stops rotating firmly, thereby causing the motor stops instantly.

Linear actuator

Growing community of inventors

Shanghai, China

Yanjun Zhang