Fluid reaction surfaces (i.e. – impellers) – Combined or convertible – Hub lubrication or seal
Patent
1984-01-24
1985-09-03
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Combined or convertible
Hub lubrication or seal
416244B, B63H 120
Patent
active
045389624
ABSTRACT:
A marine propeller locking device for securing a propeller to the drive shaft of a marine engine. The locking device includes a suitable retaining nut, exterior cover covering the retaining nut and preventing access, and a retaining bolt for mounting the cover on the retaining nut. A cylindrical surface is provided on the end of the retaining nut which compliments a like surface on the interior portion of the cover. A pair of O-rings are suitably mounted on the surface of the retaining nut and allow the cover to turn with respect to the nut yet maintaining a waterproof seal therebetween. The O-rings are spaced longitudinally a suitable distance to provide transverse support and stability for the cover. The head of the retaining bolt has a specific groove pattern which is matched by a companion wrench so that the bolt cannot be removed by an unauthorized person using common ordinary tools. A cap having a waterproof seal is positioned over the end of the cover so as to seal the internal cavity. Various outer surface configurations can be provided for the cover and adjoining cap with an ellipsoid or bullet shape suggested to eliminate any attaching or gripping surfaces on the outer surface of the cover.
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patent: 4077742 (1978-03-01), Goodwin
patent: 4257247 (1981-03-01), Sims
Pittenger James E.
Powell Jr. Everette A.
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