The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 2021
Filed:
Mar. 01, 2019
Zhejiang University, Hangzhou, CN;
ZHEJIANG UNIVERSITY, Hangzhou, CN;
Abstract
The present disclosure relates to a suction device including a shell with a chamber, the chamber including an opening. A fan is disposed in the chamber, and a power component for driving the fan to rotate is disposed on the shell. An external fluid source holding an additional fluid is connected to the chamber. The additional fluid of the external fluid source flows into the chamber to occupy a volume in the chamber and at least partially forces a first fluid originally present in the chamber out of the chamber. The fan drives fluids in the chamber to rotate so that a stepped negative pressure is generated in the chamber, with a magnitude of the negative pressure decreasing as a distance to a periphery of the chamber decreases. Thereby, a pressure difference between an inside and an outside of the shell is decreased, decreasing vacuum leakage of the suction device.