Results 131 to 140 of about 2,174 (175)

Valveless Small Gas Pump

Nanoscale and Microscale Thermophysical Engineering, 2006
In this article, a small valveless gas pump based on a synthetic jet actuator is developed. Instead of a check or active valve, a special flow control structure in consideration of synthetic jet characteristics is designed to realize valve function. A small-sized prototype of this pump is presented.
Xiao-Bing Luo, Hye-Jung Cho
openaire   +1 more source

Study on geometry of valveless-micropump

2009 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2009
A gas-jet micro pump with novel cross-junction channel has been designed and fabricated using a Si micromachining process. The valveless micro pump is composed of a piezoelectric lead zirconate titanate (PZT) diaphragm actuator and fluidic network. The design of the valveless pump focuses on a cross-junction formed by the neck of the pump chamber and ...
V. T. Dau, T. X. Dinh, K. Tanaka, S. Sugiyama   +3 more
openaire   +1 more source

Dynamic optimization of valveless micropump

2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, 2011
For the first time, this paper reports on an effective topology optimization method to improve the output net flux for valveless micropumps. The micropump considered here is actuated by the vibration of membranes and can generate a net flow along the optimized rigid fluidic channel. The detailed layout of the micropump channel is optimized with respect
Deng, Y. B., Wu, Y. H., Xuan, M., Korvink, J. G., Liu, Z. Y.   +4 more
openaire   +2 more sources

Modeling Valveless Pumping Mechanisms

2014
Several mechanisms of valveless pumping are studied numerically. The discussion begins with an introduction into the two well-known driving mechanisms of flow in valveless tubes: impedance pumping and peristalsis. Flow generated from peristalsis and impedance pumping is examined using the immersed boundary method.
openaire   +1 more source

Automatic Valveless Gravity Filters

Journal AWWA, 1962
This article discusses the automatic valveless gravity filter. The essential revolutionary aspect of this new filter is that it operates without butterfly valves, pilot mechanisms, rate controllers, gages, graphic panels, or air compressors. The article discusses operation of the valveless filter, its benefits and its costs.
openaire   +1 more source

valveless, adj.

2023
openaire   +1 more source

A Micromixer Driven by Two Valveless Piezoelectric Pumps With Multi-Stage Mixing Characteristics

Sensors and Actuators A: Physical, 2022
Xiaodong Sun, Liu Guojun, Luntao Dong
exaly  

Valveless Piezoelectric Pump With Reverse Diversion Channel

Electronics, 2021
Yongming Yao, Tianyu Li
exaly  

Valveless water waste preventer

Urology, 1979
openaire   +2 more sources

A High Flow-Rate Single-Chamber Valveless Piezoelectric Pump With Airfoil Baffles

Sensors and Actuators A: Physical, 2023
Jianhui Zhang
exaly