Fluid reaction surfaces (i.e. – impellers) – Protective screen or guard – Water or marine propellers
Patent
1988-07-25
1989-06-06
Garrett, Robert E.
Fluid reaction surfaces (i.e., impellers)
Protective screen or guard
Water or marine propellers
403 24, F04D 2970
Patent
active
048367516
ABSTRACT:
A detachable electric fan and more particularly a built-up electric fan comprising component parts of detachable stand and one set of built-up blade-protective covers for easy carriage and storage; a stand being consisted of a transverse base plate having a connection trough at the top in the center with rib channels provided, and an independent vertical frame plate having a control switch button set mounted thereon and elastic retainers and reinforcing ribs at the bottom for connection with the base plate; the blade-protective cover symmetrically arranged, each blade-protective cover being composed of two semi-circular cover plates with one symmetric set of pin holder and locking pin for easy assembly, each blade-protective cover being supported with a circular supporting plate by bolts, the rear blade-protective cover having an axial hole for insertion of motor shaft to let the fan blades be well protected; by the built-up component parts to form a detachable electric fan for easy carriage and to reduce the storage space and manufacturing cost.
REFERENCES:
patent: 2433280 (1947-12-01), Koch et al.
patent: 2498968 (1950-02-01), Viewegh
patent: 3787142 (1974-01-01), Dupke
patent: 4732539 (1988-03-01), Shin-Chin
patent: 4746273 (1988-05-01), Sun
Garrett Robert E.
Kwon John T.
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