Device for controlling the variation in pitch of the blades of a

Details Device for controlling the variation in pitch of the blades of a Device for controlling the variation in pitch of the blades of a

1976-04-21

1977-12-06

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

416167, B64C 1138

Patent

active

040614409

ABSTRACT:
Each fan-blade carries a bevel-pinion in mesh with two bevel ring-gears which are driven in rotation in opposite directions by means of two coaxial cylindrical tubular members. Carriages are mounted for axial motion within the space formed between the two tubular members; balls are fitted in helical grooves formed at opposite angles of slope in the internal and external cylindrical faces of the carriages and in corresponding helical grooves formed in the adjacent faces of the tubular members so as to form a ball-race. The moving member of at least one axial hydraulic jack constituting a motor is coupled to the carriages and the stationary member is coupled to the fan-shaft.

REFERENCES:
patent: 1982284 (1934-11-01), Briner
patent: 2440046 (1948-04-01), Hautier
patent: 2679299 (1954-05-01), Kelson
patent: 2954830 (1960-10-01), Gehres
patent: 2993543 (1961-07-01), Allen
patent: 3825370 (1974-07-01), McMurtry et al.
patent: 3873235 (1975-03-01), Mendelson
patent: 3891346 (1975-06-01), Keenan et al.
patent: 3900274 (1975-08-01), Johnston et al.
patent: 3901626 (1975-08-01), McMurtry
patent: 3922852 (1975-12-01), Drabek

Affiliated with

Also associated with

Rating

Device for controlling the variation in pitch of the blades of a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for controlling the variation in pitch of the blades of a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for controlling the variation in pitch of the blades of a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1548206