Vessel speed measuring system for the marine propulsion machine

Details Vessel speed measuring system for the marine propulsion machine Vessel speed measuring system for the marine propulsion machine

1992-03-20

1995-05-09

Woodiel, Donald O.

Measuring and testing

Navigation

Ship's log

440 2, G01C 2110

Patent

active

054129842

ABSTRACT:
The present invention details several embodiments of a vessel speed measuring and indicating system, having a pressure intake port within a leading edge of a lower outboard portion of a vessel propulsion arrangement, which is structured to prevent debris, such as driftwood or the like, from entering and becoming lodged within the pressure intake port during operation of the vessel, so that the vessel speed can be accurately measured and displayed. The constructions detailed herein include a projection which is formed in the vicinity of the pressure intake port. The projection may be slightly above the pressure intake port, below the pressure intake port, or both above as well as below the pressure intake port.

REFERENCES:
patent: 4821567 (1989-04-01), Nakamura et al.
patent: 4914945 (1990-04-01), Nakamura et al.
patent: 4914946 (1990-04-01), Nakamura et al.
patent: 4916644 (1990-04-01), Nakamura et al.
patent: 4932249 (1990-06-01), Nakamura et al.
patent: 4956997 (1990-09-01), Nakamura et al.
patent: 5004439 (1991-04-01), Onoue

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