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Class Information
Number: 440/72
Name: Marine propulsion > Screw propeller > Propeller guard > Cage or screen
Description: Device wherein the protecting means comprises an enclosure or a mesh surrounding the propeller.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7140931 |
System and apparatus for improving safety and thrust from a hydro-drive device |
Nov. 28, 2006 |
| 6896565 |
Protective cage for an outboard motor and holding device thereof |
May. 24, 2005 |
| 6821167 |
Outboard motor |
Nov. 23, 2004 |
| 6716263 |
Air suction device for use in surface boat |
Apr. 6, 2004 |
| 6478640 |
Propeller safety guard for outboard and stern drive motors |
Nov. 12, 2002 |
| 6220906 |
Marine propulsion assembly |
Apr. 24, 2001 |
| 5947782 |
Motorized tubular flotation apparatus |
Sep. 7, 1999 |
| 5928042 |
Propeller guard |
Jul. 27, 1999 |
| 5915324 |
Screen system for marine thrusters |
Jun. 29, 1999 |
| 5759075 |
Propeller guard |
Jun. 2, 1998 |
| 5651707 |
Propulsive thrust ring system |
Jul. 29, 1997 |
| 5470262 |
Propeller enclosure |
Nov. 28, 1995 |
| 5224889 |
Propeller guard |
Jul. 6, 1993 |
| 5207605 |
Outboard propeller guard |
May. 4, 1993 |
| 5205766 |
Propeller guard |
Apr. 27, 1993 |
| 5176550 |
Engine propeller blade and lower unit protector |
Jan. 5, 1993 |
| D325916 |
Propeller cage for a boat motor |
May. 5, 1992 |
| D322256 |
Propelled guard for boat motor |
Dec. 10, 1991 |
| D322074 |
Outboard propeller guard |
Dec. 3, 1991 |
| 5066254 |
Boat propeller guard |
Nov. 19, 1991 |
| 5009620 |
Propeller guard |
Apr. 23, 1991 |
| 4957459 |
Propeller shroud with load bearing structure |
Sep. 18, 1990 |
| 4926781 |
Portable personal floatation device |
May. 22, 1990 |
| 4826461 |
Propeller protector |
May. 2, 1989 |
| 4726183 |
Self retracting screens for turbomachinery |
Feb. 23, 1988 |
| 4718871 |
Aquatic growth cutter |
Jan. 12, 1988 |
| 4680017 |
Motorboat propeller guard for improved performance |
Jul. 14, 1987 |
| 4411631 |
Propeller guard |
Oct. 25, 1983 |
| 4223627 |
Propulsion device for embedding in an iceberg |
Sep. 23, 1980 |
| 4106425 |
Marine propulsion unit with protected screw |
Aug. 15, 1978 |
| 4078516 |
Propeller guard |
Mar. 14, 1978 |
| 4070984 |
Outboard motor and weed guard therefor |
Jan. 31, 1978 |
| 4013033 |
Weed guard for trolling motors |
Mar. 22, 1977 |
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