Marine propulsion – Screw propeller – Propulsion unit casing
Patent
1991-06-27
1992-12-15
Sotelo, Jesus D.
Marine propulsion
Screw propeller
Propulsion unit casing
440 89, B63H 2124
Patent
active
051711770
ABSTRACT:
A driveshaft housing structure adapted for interposition between the powerhead and the gearcase of an outboard marine propulsion system. The driveshaft housing structure is integrally formed, and provides a driveshaft passage, a cooling water intake conduit arrangement, an exhaust discharge passage, a cooling water discharge passage, and an exhaust idler relief system. The listed components are formed of a series of walls which comprise a part of the integrally formed driveshaft housing structure, to provide a unitary one-piece cast structure eliminating the need to assemble an adaptor plate to the upper end of a driveshaft housing, as in the prior art. The unitary one-piece structure is constructed from lost foam casting of an assembled pattern which allows the various components to be integrally formed with each other.
REFERENCES:
patent: 2209301 (1940-07-01), Johnson et al.
patent: 2549479 (1951-04-01), Kiekhaefer
patent: 2609782 (1952-09-01), Kiekhaefer
patent: 4033282 (1977-07-01), Pichl
patent: 4906214 (1990-03-01), Towner
Pages 22, 23, 30, 31 and 34-37 of Quichsilver Parts Catalog for 220hp V6 Engines, Sep., 1987, published by Mercury Marine Division of Brunswick Corporation.
Brunswick Corporation
Sotelo Jesus D.
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