Counter-rotation transmission

US4850910A · kind A · utility

Assignee

• Outboard Marine Corporation · US

Inventors

• Jeffery P. Higby · Waukegan, US
• Kennedy K. McElroy, Jr. · Lindenhurst, US
• Arthur R. Ferguson · Northbrook, US
• Gerald F. Bland · Glenview, US
• Michael Freitag · Würzburg, DE
• Donald K. Sullivan · Waukegan, US

Key dates

• Filing date: May 29, 1987
• Grant date: Jul 25, 1989
• Expiry date: May 29, 2007

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B63H20/20
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

Disclosed herein is a marine propulsion device comprising a lower unit including a gearcase, a driveshaft having an end extending into the gearcase, a pinion mounted on the end of the driveshaft, a propeller shaft bearing housing located within the gearcase having a forward end adjacent the pinion, a propeller shaft rotatably mounted in the propeller shaft bearing housing and having a rear end portion and a portion forwardly of the rear end portion, a propeller mounted on the rear end of the propeller shaft, a bevel gear adjacent the forward end of the propeller shaft bearing housing and engaging the pinion, the bevel gear including an annular forwardly facing thrust transferring surface, and an annular thrust transferring element mounted on the propeller shaft bearing housing and engageable with the annular forwardly facing thrust transferring surface so as to transfer thrust forwardly from the bevel gear through the thrust transferring element and to the propeller shaft bearing housing.