Fan with collapsible blades, redundant fan system, and...

Rotary kinetic fluid motors or pumps – Plural runners supported for relative motion or on separate... – Serially spaced in working fluid flow path

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C416S143000, C416S142000

Reexamination Certificate

active

06860713

ABSTRACT:
A redundant fan system for a computer includes two fans installed in series with at least one of the fans having collapsible blades. A fan system of this type reduces the fan inefficiency caused when one fan in a series mounted pair is not operating, either because it is free-wheeling or in a locked rotor condition. When non-operational, the fan blades of the collapsible fan fold inward due to airflow generated by the operational fan over the collapsible blades. The ability of the blades to fold reduces the inefficiency of the operational fan, having less of an effect on fan life. Also, because the flow of air is less restricted, proper airflow can be maintained, thus preventing overheating of the computer.

REFERENCES:
patent: 725097 (1903-04-01), Learnard
patent: 1445402 (1923-02-01), Le Velle
patent: 1728768 (1929-09-01), O'Connor
patent: 1835284 (1931-12-01), Crowhurst
patent: 2374822 (1945-05-01), Rippingille
patent: 3565544 (1971-02-01), Marshall
patent: 4095919 (1978-06-01), Ehrenskjold et al.
patent: 4364711 (1982-12-01), Brandt et al.
patent: 4776761 (1988-10-01), Diaz
patent: 4801243 (1989-01-01), Norton
patent: 4979876 (1990-12-01), Chapman
patent: 5183384 (1993-02-01), Trumbly
patent: 5546272 (1996-08-01), Moss et al.
patent: 6213716 (2001-04-01), Bucher et al.
patent: 6253834 (2001-07-01), Sterner
patent: 6371726 (2002-04-01), Jonsson et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Fan with collapsible blades, redundant fan system, and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fan with collapsible blades, redundant fan system, and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan with collapsible blades, redundant fan system, and... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3417140

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.