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:
Nov. 24, 2020
Filed:
May. 12, 2017
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Keiichi Ono, Tainai, JP;
Tomoyuki Suzuki, Tainai, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
An isolation device for supplying a workspace with clean air resulting from dust filtration by an air cleaning means accurately manages the number of fine particles in a workspace and prevents fine particles from mixing with an experimental material. The isolation device includes a measurement probe; a particle counter for measuring the fine-particle counts for a plurality of particle sizes in the workspace air and outputting the measurements; a storage unit for storing, for each of the plurality of particle sizes and for work times and non-work times, management fine-particle counts at which the number of fine particles per unit volume is determined to be large; a cleanliness determination unit that compares the fine particle counts and the management fine-particle counts; and an output unit for outputting an alarm when the work-time/non-work time fine particle count for a particle size in the workspace exceeds the corresponding management fine-particle count.