Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1976-07-30
1977-06-28
Hoag, Willard E.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
291568P, 295273, 156155, 156245, 156293, 264258, 264263, 264267, 264274, 264279, 264294, 264328, B29D 302, B29G 300
Patent
active
040316017
ABSTRACT:
A method of fabricating and mounting a fiberglass fan blade of predetermined configuration which includes the steps of producing a metal hub having a dovetail slot in one end thereof and also having a bore extending from the other end thereof into said slot, assembling a plurality of layers of resin-impregnated fiberglass sheet in superposed relation forming a blade blank of predetermined dimensions, each of said layers including a blade portion and a root portion of a width at least equal to the diameter of said hub, interleaving additional pieces of the fiberglass sheet with the root portions of said layers to increase the thickness of the resulting root portion of the blank to approximately the configuration of the hub slot, inserting the root portion of the blank into the slot, placing the assembled blank and hub in a mold which includes cavities for the blank and the hub and a shoulder at the inner end of said hub cavity, heating the mold until the resin substantially liquifies while maintaining the one end of the hub in seated relation with the shoulder, forcing additional substantially liquified resin and fiberglass material through the bore into the slot until the slot and all spaces between adjacent the layers are completely filled, closing the heated mold at a predetermined rate into fully closed relation with the blank and the hub, and effecting curing of the resin while maintaining the mold closed.
REFERENCES:
patent: 2175204 (1939-10-01), Lougheed
patent: 2182812 (1939-12-01), Lougheed
patent: 2621140 (1952-12-01), Bitterli et al.
patent: 2796215 (1957-06-01), Warnken
patent: 2950083 (1960-08-01), Compton et al.
patent: 3132841 (1964-05-01), Wilder
patent: 3713752 (1973-01-01), Kurti
patent: 3737250 (1973-06-01), Pilpel et al.
Staub Anthony F.
Staub Norman T.
Dayton Scale Model Company
Hoag Willard E.
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