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4231 results about "Push pull" patented technology

Integrated magnetics for a DC-DC converter with flexible output inductor

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.

In situ remedial alternative and aquifer properties evaluation probe system

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.

Residual film recovery device and residual film recovery machine formed by same

The invention discloses a residual film recovery device and a residual film recovery machine formed by the same. The residual film recovery device comprises a cylindrical hollow roller (4). The periphery of the outer wall of the roller (4) is provided with fingered picking teeth (6). Film withdrawing sliding blocks (3) are arranged on the picking teeth (6). The roller (4) is provided with a hollow shaft (8). A sliding sleeve (7) and chute plates (5) are arranged on the hollow shaft (8). Push-pull connecting rods (2) are arranged between the chute plates (5) and the film withdrawing sliding blocks (3). The residual film recovery device can be applied to various farmland operation machinery to form the residual film recovery machine or a combined land preparation operation machinery. Compared with the prior art, the residual film recovery device and the residual film recovery machine have simple structures and good operation effect; the problem of eliminating wound residual films and plant straws in the operating process is solved; the operation is ensured to be normally carried out; the residual film recovery device can be applied onto various residual film recovery machines and can also be integrated onto other combined land preparation operation machineries or similar operation machineries.

Electromagnetic push-pull Braille touch screen

The invention discloses an electromagnetic push-pull Braille touch screen which comprises contacts with the number being the multiple of 6. Each six contacts are arranged in three rows and two lines so as to form a Braille unit; all the Braille units are assembled to compose the Braille touch screen; each contact comprises a base frame, a return spring, a coil, a permanent magnet, an iron core and a coil lead; one end of the return spring is connected to the bottom of the permanent magnet, and the other end of the return spring is fixed on the base frame; the coil and the iron core compose an electromagnet which is fixed at the bottom of the base frame; the coil lead is connected with an external control circuit for supplying power for the coil; and the top of the permanent magnet is hemispherical. The touch screen utilizes the electricity-to-magnetism principle, the Ampere's rule and the phenomenon that magnets with the same poles reprehend each other, and realizes the rising and reset of the contact through the thrust and pull generated by the permanent magnet and the electromagnet. The touch screen is in line with the formation rule of Braille and the using habits of blind persons, is simple in structure principle and easy to realize, and can realize the fast generating and updating of the Braille through being externally controlled by a common chip.
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