Internal-combustion engines – Cooling – Devices for cooling liquid by air flow
Patent
1984-01-23
1985-06-11
Cuchlinski, Jr., William A.
Internal-combustion engines
Cooling
Devices for cooling liquid by air flow
165135, 415213C, F01P 506
Patent
active
045221600
ABSTRACT:
Fan-shroud structure and mounting which compensates for relative movement between an engine and radiator to prevent contact between a rotating fan and the shroud structure. In one embodiment of the invention, a one-piece fiberglass shroud is provided having a generally rectangular end portion which is integral with and merges into an opposed annular venturi portion. The rectangular end portion is secured to a bulbous seal which accommodates the relative movement between the engine and radiator to prevent damage to the shroud. In an alternate embodiment, a one-piece fiberglass venturi shroud is provided having a rounded convergent end section, a throat section and a divergent end section. A box-like outer shroud having an opening therein receives the convergent end section and a bulbous seal is fitted around the opening in the outer shroud for engagement with the throat section. The flexible bulbous seal which is interposed between the venturi shroud and the outer shroud accommodates the relative movement between the engine and radiator by yielding or flexing during such movement. Another embodiment of the fan-shroud structure includes a two-piece venturi shroud having separately formed sections of polyurethane and fiberglass. The flexible polyurethane section accommodates relative movement of the fiberglass section by flexing to prevent contact between the rotating fan and shroud structure. In the embodiments of the fan-shroud structure heretofore described, a relatively small clearance is maintained between the blade tips of the fan and the inner periphery of the shroud. However, an alternative embodiment of the fan-shroud structure includes a box section integrally formed with a rounded reverse venturi section that is flared inwardly into the box section. This fan-shroud is mounted to the radiator to provide a fairly large fan tip clearance thereby permitting substantial relative movement between the fan and the shroud.
REFERENCES:
patent: 2668523 (1954-02-01), Lamb
patent: 3937189 (1976-02-01), Beck
patent: 4213426 (1980-07-01), Longhouse
Inhofer John D.
Redenbarger Philip D.
Speers Leonard E.
Cuchlinski Jr. William A.
J. I. Case Company
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