Yefim S Levin from 2 Bengal Ln, Salem, MA 01970, age 84, Phone: 978 744-4867

Address:

Salem, MA 01970

License #:

2300 - Expired

Issued Date:

Feb 17, 1993

Expiration Date:

May 28, 1995

Type:

Appraiser

Linear Fan
view source
US Patent:

20090028689, Jan 29, 2009
Filed:

Apr 25, 2006
Appl. No.:

11/818961
Inventors:

Yefim Levin - Boston MA, US
Vadim Levin - Newton MA, US
International Classification:

F03B 9/00
US Classification:

415 5
Abstract:

The linear fan comprises blades that are fixed onto a flexible transmission engaging leading and follower pulleys. Each blade has cylindrical shanks to facilitate swivel fixation. The veer of the blades is provided with directive disks. In another embodiment, position of the blades is permanent with respect to direction of motion of the transmissions and connection of the blades with the transmissions is provided with prismatic shanks in such a way that outlines of cross section of the blades are symmetrical with respect to direction of motion of the transmission. This fan also comprises the guide vanes that are fixed in one of two positions, the first position provides forward direction of operation and the second one assures reverse operation of the fan.