Sacrificial anode for marine propulsion units

Details Sacrificial anode for marine propulsion units Sacrificial anode for marine propulsion units

1988-05-23

1989-10-10

Basinger, Sherman D.

Marine propulsion

Miscellaneous

204196, 440900, 440 61, C23F 1300

Patent

active

048728608

ABSTRACT:
A sacrificial anode (19, 47, 55, 61) is disposed in association with the trim cylinder unit (12) of a marine propulsion device and is positioned in the previously unused area between the aft cylinder (13) end and the rodeye (16) or the like on the piston rod (15) end. More specifically, the anode is in the form of an elongated generally cylindrical member of a diameter approximating that of the trim cylinder to provide improved mass characteristics, and is deeply grooved (21) to thus provide ribs (22) which enhance the working surface area. The anode may be attached to an extended pilot member (23, 45) which is suitably secured within the aft end of the trim cylinder. It is contemplated that a cover (35) may be utilized in conjunction with the anode to improve the aesthetic appearance of the affected area, while permitting water flow through the anode. In one embodiment, a unitary anode (19) is provided with a radial slot (33), which permits the anode to be positioned over the trim cylinder rod (15). In another embodiment (FIGS. 9-11), the anode (47) is formed as two half cylinders (48). In yet anothr embodiment (FIGS. 12-13), the anode (55) is formed as two segments (56), each having staggered puzzle-like configurations which are interfit. Depending on the anode type, the anode may be secured to the pilot member by longitudinal bolts (31, 60) or by a rib and groove connection (51, 53). Alternately (FIG. 14), the anode may be secured directly on the trim cylinder piston rod shaft. In addition, the anode cover may be secured to the anode itself or to the trim cylinder by a snal-on arrangement.

REFERENCES:
patent: 3060259 (1962-10-01), Flower et al.
patent: 3098027 (1963-07-01), Flower
patent: 4267029 (1981-05-01), Massarsky
patent: 4342634 (1982-08-01), Haasl et al.

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