Double spider stiffening assembly for fan blades

Details Double spider stiffening assembly for fan blades Double spider stiffening assembly for fan blades

1976-06-18

1977-10-11

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Distally supported on radial arm

416244R, 416DIG3, F04D 2934

Patent

active

040532607

ABSTRACT:
A fan blade mounting employing two integral workpieces formed of sheet metal, each having a central hub portion and radially extending arms, the sheet metal arms of each are centrally bulged or ribbed in the region where they join the hub, the ribs facing in opposite directions to form a cavity in each two-part arm. The central hub portion of each workpiece is depressed from the plane of its arms, the hub portions being nested. Each spider arm is thus stiffened by the compressive loading within one rib when a transverse force is applied on the opposite arm.

REFERENCES:
patent: 1255346 (1918-02-01), Sparks
patent: 1404298 (1922-01-01), Jacobs
patent: 1634554 (1927-07-01), Pajalic
patent: 2351225 (1944-06-01), Patrick et al.
patent: 2906349 (1959-09-01), Hans et al.
patent: 3315749 (1967-04-01), Parsons et al.

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