A valve-less planar fluid pump with two pump chambers

Olsson, Anders; Stemme, Göran; Stemme, E.

doi:10.1016/0924-4247(94)00960-p

Cited by 252 publications

(165 citation statements)

References 6 publications

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“…Conventional valves in microfluidics systems are subject to mechanical failure and, in the case of biological fluids, present further risk of malfunction due to clogging or to damage sensitive biomolecules. Current valveless pumping techniques mainly consist of peristaltic [2][3][4][5] and reciprocating diaphragm pumps relying on diffusers [6][7][8][9][10]. These systems are often fabricated on a substrate through the use of soft lithography on polymeric materials because they are flexible and allow the form and features of these devices to be created and remain functionally sound.…”

Section: Introductionmentioning

confidence: 99%

A valveless micro impedance pump driven by electromagnetic actuation

Rinderknecht¹,

Hickerson²,

Gharib³

2005

J. Micromech. Microeng.

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Over the past two decades, a variety of micropumps have been explored for various applications in microfluidics such as control of pico-and nanoliter flows for drug delivery as well as chemical mixing and analysis. We present the fabrication and preliminary experimental studies of flow performance on the micro impedance pump, a previously unexplored method of pumping fluid on the microscale. The micro impedance pump was constructed of a simple thin-walled tube coupled at either end to glass capillary tubing and actuated electromagnetically. Through the cumulative effects of wave propagation and reflection originating from an excitation located asymmetrically along the length of the elastic tube, a pressure head can be established to drive flow. Flow rates were observed to be reversible and highly dependent on the profile of the excitation. Micro impedance pump flow studies were conducted in open and closed circuit flow configurations. Maximum flow rates of 16 ml min −1 have been achieved under closed loop flow conditions with an elastic tube diameter of 2 mm. Two size scales with channel diameters of 2 mm and 250 µm were also examined in open circuit flow, resulting in flow rates of 191 µl min −1 and 17 µl min −1 , respectively.

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Section: Introductionmentioning

confidence: 99%

A valveless micro impedance pump driven by electromagnetic actuation

Rinderknecht¹,

Hickerson²,

Gharib³

2005

J. Micromech. Microeng.

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“…3(b)). If the plate and rod elements are installed with adequate gap, these elements work like as the nozzle/diffuser elements of the valve-less pump [7]. The volume flow in the suction direction is much higher than the volume flow in the downfall direction.…”

Section: Observation Of the Flowmentioning

confidence: 99%

An Ultrasonic Suction Pump with No Physically Moving Parts

Chen

Hasegawa

Nakamura

et al. 2004

Jpn. J. Appl. Phys.

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A new ultrasonic suction pump is described in this paper. The pump uses suction force of the rigid cylinder tube vibrating at an ultrasonic frequency and has no physically moving parts. The pump is consists of a longitudinal bolt-clamped Langevin transducer (BLT) combined with a stepped horn working at its resonance frequency of 24 kHz. A glass tube of the half-wavelength-resonance length is glued at the tip of the horn. To enhance the pump performance, we introduce a reflection plate and a thin rod installed to the end of the glass tube with a small gap. The maximum pressure of 7.2 kPa and 23.5 kPa were recorded by using the reflection plate and the thin rod, respectively. In this study, we investigate the characteristics of the pump, and the operation physics experimentally. The highest pressure is the functions of the vibration velocity of the end surface of the glass tube and of the gap.

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“…In 1995, Olsson, et al optimized the structure of valveless piezoelectric pump with cone-shaped tubes for efficiency increase [40]. They proposed a parallel structure composed of two valveless piezoelectric pumps with cone-shaped tubes fixed in the same plane, where the connection of cone-shaped tubes were modified from solid structure to plane structure.…”

Section: Parallel Structurementioning

confidence: 99%

Advances in Valveless Piezoelectric Pump with Cone-shaped Tubes

Zhang

Wang

Huang

2017

Chin. J. Mech. Eng.

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This paper reviews the development of valveless piezoelectric pump with cone-shaped tube chronologically, which have widely potential application in biomedicine and micro-electro-mechanical systems because of its novel principles and deduces the research direction in the future. Firstly, the history of valveless piezoelectric pumps with cone-shaped tubes is reviewed and these pumps are classified into the following types: single pump with solid structure or plane structure, and combined pump with parallel structure or series structure. Furthermore, the function of each type of cone-shaped tubes and pump structures are analyzed, and new directions of potential expansion of valveless piezoelectric pumps with cone-shaped tubes are summarized and deduced. The historical argument, which is provided by the literatures, that for a valveless piezoelectric pump with cone-shaped tubes, cone angle determines the flow resistance and the flow resistance determines the flow direction. The argument is discussed in the reviewed pumps one by one, and proved to be convincing. Finally, it is deduced that bionics is pivotal in the development of valveless piezoelectric pump with cone-shaped tubes from the perspective of evolution of biological structure. This paper summarizes the current valveless piezoelectric pumps with cone-shaped tubes and points out the future development, which may provide guidance for the research of piezoelectric actuators.

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A valve-less planar fluid pump with two pump chambers

Cited by 252 publications

References 6 publications

A valveless micro impedance pump driven by electromagnetic actuation

A valveless micro impedance pump driven by electromagnetic actuation

An Ultrasonic Suction Pump with No Physically Moving Parts

Advances in Valveless Piezoelectric Pump with Cone-shaped Tubes

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