Axial fan adjustable pitch connectable blades

Details Axial fan adjustable pitch connectable blades Axial fan adjustable pitch connectable blades

1975-10-28

1977-10-11

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Adjustable

416214R, F04D 2936

Patent

active

040532593

ABSTRACT:
The hub of an axial-flow fan is constituted by two shell members axially juxtaposed for driven rotation about a common first axis. Circumferentially distributed ribs project from each shell member toward ribs on the other shell member, each pair of ribs being formed with cylindrically arcuate, respective seating faces about a common second axis transverse to the first axis, the seating faces jointly receiving a conforming root portion of a blade whose wing portion projects radially beyond the hub. The shell members and root portions are releasably clamped to each other by a clamping bolt axially passing through aligned openings in the shell members, the ribs, and the root portions, one clamping bolt constituting the sole element securing each blade to the hub so that individual blades may be released by removing one bolt only.

REFERENCES:
patent: 1816317 (1931-07-01), Dicks
patent: 2232670 (1941-02-01), Barrett
patent: 2307490 (1943-01-01), Curley
patent: 2573875 (1951-11-01), Riddiford
patent: 2620884 (1952-12-01), Gluhareff
patent: 2765859 (1956-10-01), Hartzell et al.
patent: 3130677 (1964-04-01), Liebhart
patent: 3161239 (1964-12-01), Andersen
patent: 3167129 (1965-01-01), Shultz
patent: 3545885 (1970-12-01), Killam

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