US 11,754,200 B2
Miniature transportation device
Hao-Jan Mou, Hsinchu (TW); Chi-Feng Huang, Hsinchu (TW); Yung-Lung Han, Hsinchu (TW); and Chun-Yi Kuo, Hsinchu (TW)
Assigned to MICROJET TECHNOLOGY CO., LTD., Hsinchu (TW)
Filed by Microjet Technology Co., Ltd., Hsinchu (TW)
Filed on May 16, 2019, as Appl. No. 16/414,096.
Claims priority of application No. 107117277 (TW), filed on May 21, 2018.
Prior Publication US 2019/0353157 A1, Nov. 21, 2019
Int. Cl. F16K 99/00 (2006.01); F04B 43/04 (2006.01); F04B 13/00 (2006.01); F04B 45/047 (2006.01); B81B 7/02 (2006.01)
CPC F16K 99/0015 (2013.01) [F04B 13/00 (2013.01); F04B 43/046 (2013.01); F04B 45/047 (2013.01); F16K 99/0048 (2013.01); B81B 7/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A miniature transportation device comprising:
a gas inlet plate comprising at least one inlet, at least one convergence channel and a convergence chamber, wherein the at least one inlet is configured to introduce gas into the miniature transportation device, and a first end of the at least one convergence channel is in fluid communication with the at least one inlet, and a second end of the at least one convergence channel is in communication with the convergence channel, so that the gas fed from the at least one inlet is converged to the convergence chamber;
a resonance plate comprising a central aperture spatially corresponding to the convergence chamber of the gas inlet plate; and
a piezoelectric actuator comprising:
a suspension plate having a diameter in the range between 4 mm and 8.5 mm and comprising a first surface, a second surface and a bulge having a top surface formed on the second surface;
an outer frame surrounding the periphery of the suspension plate and comprising an assembling surface and a bottom surface, wherein the top surface and the assembling surface are non-coplanar when the miniature transportation device is not actuated;
at least one bracket connected between the suspension plate and the outer frame to provide elastic support for the suspension plate; and
a piezoelectric element attached on the first surface of the suspension plate;
wherein the resonance plate is stacked on the assembling surface of the outer frame, and the gas inlet plate is stacked on the resonance plate, so that the gas inlet plate, the resonance plate and the piezoelectric actuator are stacked on each other sequentially, and a chamber gap is formed between the resonance plate and the piezoelectric actuator to define a first chamber, wherein when the piezoelectric actuator is enabled, the gas is fed through the at least one inlet of the gas inlet plate into the miniature transportation device, converged through the at least one convergence channel to the convergence chamber, transferred through the central aperture of the resonance plate, introduced into the first chamber, and transferred along a transportation direction through at least one vacant space of the piezoelectric actuator to be discharged continuously,
wherein the chamber gap is adjusted by the at least one bracket formed between the suspension plate and the outer frame.