Fluid reaction surfaces (i.e. – impellers) – Protective screen or guard – Water or marine propellers
Patent
1991-01-25
1991-12-17
Kwon, John T.
Fluid reaction surfaces (i.e., impellers)
Protective screen or guard
Water or marine propellers
24453, 403338, F01D 2528
Patent
active
050730886
ABSTRACT:
An environmental conditioning apparatus including a control unit for conditioning a surrounding environment; a housing retaining the conditioning unit and comprising a flange defining an opening, the flange having inner and outer flange edge portions separated by oppositely directed front and rear flange surface portions; and a grill covering the opening and comprising a rim juxtaposed to the flange, the rim having inner and outer rim edge portions separated by oppositely directed front and rear rim surface portions and the rear rim surface portion facing the front flange surface portion. Also included are a plurality of fastening elements securing the rim to the flange; each of the elements being U-shaped and having an inner leg portion extending over the inner rim and flange edge portions, an outer leg portion extending over the outer rim and flange edge portions, a web portion joining the inner and outer leg portions and engaging either the front rim surface portion or the rear flange surface portion, and a latch portion terminating one of the leg portions and engaging the other front rim surface portion or rear flange surface portion not engaged by the web portion. The fastening elements facilitate assembly and disassembly of the grill.
REFERENCES:
patent: D309944 (1990-08-01), Chiu
patent: 3963382 (1976-06-01), Patton
patent: 4566660 (1986-01-01), Anscher et al.
patent: 4840334 (1989-01-01), Kikuchi
patent: 4943183 (1990-07-01), Nakano
Duracraft Corporation
Jarcho Harold G.
Kwon John T.
Toupal John E.
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