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US 5,366,398 AGranted
Marine dual propeller lower bore drive assembly
AssigneeBrunswick Corporation
InventorsGary L. Meisenburg, Edward C. Eick, Phillip D. Magee, Charles M. Mixon, Robert B. Weronke, Waylon D. Shields, Woody R. Smith, Steven J. Pavey
Life of this patent
Estimating the term…
Abstract
A marine drive (10, 310) has two counter-rotating propellers (12 and 14, 312 and 314). Inner and outer concentric counter-rotating propeller shafts (40 and 42, 340 and 338) are supported by a spool (38, 336) in the lower horizontal bore (28, 328). Passages are provided in the housing for communicating lubrication and/or exhaust with the horizontal bore. Locking structure (50, 404) holds the driven gears and bearings in place in the lower horizontal bore.
Claims5
A marine drive comprising:
- a housing having a horizontal bore and an intersecting vertical bore therein;
- a first inner propeller shaft;
- a second hollow outer propeller shaft positioned over said first propeller shaft so as to form a dual propeller shaft assembly,
- said dual propeller shaft assembly positioned in said horizontal bore,
- said first propeller shaft counter-rotating with respect to said second propeller shaft;
- a vertical driveshaft positioned in said vertical bore;
- a pinion driving gear mounted on the lower end of said vertical driveshaft;
- a fore driven gear on said first inner propeller shaft and engaged by said pinion gear to drivingly rotate said first propeller shaft in a first rotational direction;
- an aft driven gear on said second propeller shaft and engaged by said pinion gear to drivingly rotate said second propeller shaft in a second rotational direction;
- a tapered roller bearing supporting said aft driven gear for rotation in said housing, said tapered roller bearing having
- an inner race engaging said aft driven gear, and
- an outer race engaging said housing;
- a threaded locking member engaging said housing in thread mounted relation within said horizontal bore and holding said tapered roller bearing in place and preventing rearward movement of said tapered roller bearing and said aft driven gear;
- said threaded locking member is thread mounted at a thread set within said horizontal bore, and comprising a passage in said housing communicating with said horizontal bore aft of said thread set.
11 more elements
A marine drive comprising:
- a housing having a horizontal bore and an intersecting vertical bore therein;
- a first inner propeller shaft;
- a second hollow outer propeller shaft positioned over said first propeller shaft so as to form a dual propeller shaft assembly,
- said dual propeller shaft assembly positioned in said horizontal bore,
- said first propeller shaft counter-rotating with respect to said second propeller shaft;
- a vertical driveshaft positioned in said vertical bore;
- a pinion driving gear mounted on the lower end of said vertical driveshaft;
- a fore driven gear on said first inner propeller shaft and engaged by said pinion gear to drivingly rotate said first propeller shaft in a first rotational direction;
- an aft driven gear on said second propeller shaft and engaged by said pinion gear to drivingly rotate said second propeller shaft in a second rotational direction;
- a tapered roller bearing supporting said aft driven gear for rotation in said housing, said tapered roller bearing having
- an inner race engaging said aft driven gear, and
- an outer race engaging said housing;
- a threaded locking member engaging said housing in thread mounted relation within said horizontal bore and holding said tapered roller bearing in place and preventing rearward movement of said tapered roller bearing and said aft driven gear;
- a passage in said housing communicating with said horizontal bore, a spool in said housing supporting said dual propeller shaft assembly, said spool having a first outer diameter portion engaging said housing within said horizontal bore, and a second reduced outer diameter portion within said horizontal bore and aft of said first outer diameter portion and defining an annular recess, wherein said passage communicates with said horizontal bore at said annular recess.
11 more elements
Dependencies are inferred from the claim text.