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:
Sep. 24, 2019
Filed:
Nov. 10, 2015
Applicant:
Yeoung Cheol Cho, Seoul, KR;
Inventors:
Yeoung Cheol Cho, Seoul, KR;
Marinus Mieremet, Vinkeveen, NL;
Joon-Ho Baek, Daejeon, KR;
Bong Sik Kim, Daejeon, KR;
Ho Seong Ji, Busan, KR;
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
F02D 1/06 (2006.01); F03D 1/06 (2006.01);
U.S. Cl.
CPC ...
F03D 1/0633 (2013.01); F03D 1/0608 (2013.01); F03D 1/0625 (2013.01); F05B 2250/15 (2013.01); Y02E 10/721 (2013.01);
Abstract
A spiral blade unit is disclosed, which generates less blade-sagging, deformation, or vibration, can be made of various material, can be made with light material, and can be installed easily in interconnecting spiral blades. The spiral blade unit includes a rotational axle and spiral blades with root portions attached along an outer circumferential surface of the rotational axle, and the spiral blades are interconnected to one another through a blade connector.