Class 440/72 - Cage or screen

Subclass of Class 440 - Marine propulsion
Definition: Device wherein the protecting means comprises an enclosure
No. of patents: 37
Last issue date: 09/11/2007

Number	Title	Issue Date
7267589	System and apparatus for improving safety and thrust from a hydro-drive device A system and apparatus are disclosed for improving safety and hydro-flow thrust from a hydro-drive device. The apparatus may include a shroud having a first opening for the ingress of water, and a second opening for the egress of water, and a vane extending inward f...	09/11/2007
7229331	Shroud for a hydro thrust device An apparatus is disclosed for improving safety and hydro-flow thrust from a trolling motor. The apparatus may include a first and second semi-circular portions configured to connect together to substantially enclose a hydro-drive device, and a semi-circular bracket ...	06/12/2007
7172477	Safety propeller A safety propeller for a boat motor includes an annular collar having a front opening, a rear opening and a continuous peripheral wall. A plurality of angled, horizontal slits are circumferentially positioned about the peripheral wall to allow water to pass through ...	02/06/2007
7140931	System and apparatus for improving safety and thrust from a hydro-drive device A system and apparatus are disclosed for improving safety and hydro-flow thrust from a hydro-drive device. The apparatus may include a shroud having a first opening for the ingress of water, and a second opening for the egress of water, a diverter connected with the...	11/28/2006
7090549	System to propel an air powered boat Air propulsion system for a boat comprises an internal combustion engine for powering a propeller in a single rotational direction. A pivoting mechanism pivots the propulsion system through a 360 degree arc about a transverse horizontal axis from a first position in...	08/15/2006
6922982	Marine weedwaker A weed cutting apparatus for use in water is disclosed. The weed cutting apparatus would be designed to cut weeds within a body of water without having the weeds tangle on the present invention. ...	08/02/2005
6916217	Boat propeller shield system A boat propeller shield system for protecting a propeller from damage and humans from injury. The boat propeller shield system includes a cover, a front opening within the cover and a zipper extending from a perimeter of the front opening. The cover is preferably co...	07/12/2005
6896565	Protective cage for an outboard motor and holding device thereof Arrangement for protecting an outboard motor. The arrangement includes a holding device which is made of steel and which is adapted to be detachably fixed to a shaft of the outboard motor. The holding device includes a ring element having U-shaped cross-sectional pr...	05/24/2005
6821167	Outboard motor An outboard motor which includes a driving motor, a switching device, an impeller and a blade casing. The switching device switches rotation of a drive shaft of the driving motor between normal and reverse directions. The impeller is rotated with a driven shaft conn...	11/23/2004
6716263	Air suction device for use in surface boat An air suction device for a surface boat having a filter element of paper type arranged in an air suction passage of an engine. The filter element is composed of a core made of a filter material and a permeable waterproof sheet arranged at the upstream side surface ...	04/06/2004
6478640	Propeller safety guard for outboard and stern drive motors The Propeller Safety Guard is a wire mesh type enclosure covering the perimeter of the propeller as well as the rear plan of the propeller. The upper section of the guard is bolted to the underside of the outboard motor anticavitation plate. The lower sec...	11/12/2002
6220906	Marine propulsion assembly A marine propulsion assembly comprises a drive shaft, a first propeller fixed to the drive shaft and turnable therewith in a first direction, an annular array of gear teeth disposed on the first propeller and turnable therewith, a second propeller aligned...	04/24/2001
5947782	Motorized tubular flotation apparatus A propulsion apparatus is mounted on at least one end of a flexible tubular flotation member which is mountable about the body of the user. The propulsion apparatus is capable of propelling the tubular member and the user in the water. In one embodiment, ...	09/07/1999
5928042	Propeller guard A propeller guard for use in association with a boat propulsion propeller driven by an outboard motor or an inboard/outboard rear motor drive unit. The propeller guard may be constructed of injection molded plastic, fiber reinforced resin, metal such as a...	07/27/1999
5915324	Screen system for marine thrusters A screen system for marine thrusters is devised having directionally streamlined screens with geometrically-shaped contoured gratings capable of imparting thrust-enhancing effects, thereby permitting high operational efficiency and the ability to operate ...	06/29/1999
5759075	Propeller guard A guard for a marine propeller utilizing a flange found on the lower drive unit or power leg, thereof. The guard includes a cage which at least partially encloses the propeller and a support member for holding the cage to the lower drive unit. A support m...	06/02/1998
5651707	Propulsive thrust ring system A low-aspect ratio propeller system is provided with a multiple ring structure formed with a plurality of circular or non-circular, annular, narrow equivalent air foil rings which are held by rails in a predetermined relationship with the propeller blades...	07/29/1997
5470262	Propeller enclosure The present invention relates to a propeller enclosure for enclosing a skeg and propeller. The invention includes a fence portion which defines a first chamber. The first chamber is designed for receiving the skeg of a watercraft motor. The fence portion ...	11/28/1995
5224889	Propeller guard A device to protect the propellor of a boat from damage caused by striking underwater obstacles, when the boat is moving in any direction relative to the obstacles, and to improve the movement of the boat along the water....	07/06/1993
5207605	Outboard propeller guard Two angle brackets secure a severely swept plastic wing-like propeller guard to the sides of the motor housing or skeg. The left and right wing-like projections have a horizontal center wing segment oriented parallel the axis of propeller rotation, and up...	05/04/1993
5205766	Propeller guard A propeller guard for an outboard or stern drive motor having increased rigidity and stiffness is disclosed. The guard comprises an arcuate main spine, a plurality of side ribs and an upright brace. The spine comprises a channel adapted to engage the leg ...	04/27/1993
5176550	Engine propeller blade and lower unit protector The propeller and lower unit protector is made from a high grade steel and has a spring like U-shaped top member for sliding in a generally horizontal direction over an outboard engine cavitation plate from a front to a back portion of the engine. A gener...	01/05/1993
5066254	Boat propeller guard The propellor guard described herein is designed primarily for the protection of manatee but is also useful in protection against injury to other animals and larger fish which might come in contact with a boat's propellor. This guard is tapered toward sub...	11/19/1991
5009620	Propeller guard A propeller guard is provided with replaceable ribs that form a cage is placed around the propeller of an outboard marine propulsion unit. The ribs are suspended from a flat upper plate adapted to be bolted to a cavitation plate above the propeller. The r...	04/23/1991
4957459	Propeller shroud with load bearing structure In a marine drive (10), a propeller shroud is provided by a cage (24) having internal spoke structure (26, 28, 38, 40, 46, 48) and having retainer structure (50, 74) mounting the cage (24) to the gearcase (12) and engaging the gearcase (12) and driveshaft...	09/18/1990
4926781	Portable personal floatation device A portable personal floatation device for water sports such as fishing and the like is constructed of a light material such as styrofoam and has a horizontal main panel with an opening for a user to fit through so the floatation device surrounds the user....	05/22/1990
4826461	Propeller protector A propeller protector (26) is provided by a two piece hub structure (28, 30). Each piece has an inner arcuate portion (32, 34) substantially conforming to the side of the torpedo housing (14) of the marine drive. Each piece has a pair of fins (40 and 42, ...	05/02/1989
4726183	Self retracting screens for turbomachinery A self retracting screen for turbomachinery comprised of a number of interlocking wires, the wire ends being pivotally attached to the periphery of the normal inlet of the turbomachinery. Preferably, the wires are elliptical, or streamlined, in cross-sect...	02/23/1988
4718871	Aquatic growth cutter An upper and a lower blade are fixed together at an adjustable angle and have means for mounting same on the leading edge of the propeller drive housing of an inboard/outboard motor to cut kelp and other seaweed which would otherwise foul the prop and clo...	01/12/1988
4680017	Motorboat propeller guard for improved performance A propeller guard includes a rigid U-shaped sleeve which has a pair of legs extending on either side of the lower housing in the motor. The cavitation plates on the lower housing are received within a U-shaped channel formed in the sleeve for mounting the...	07/14/1987
4411631	Propeller guard A vessel, in particular a ferry, intended for use in ice-filled waters, is provided with a propeller guard having the form of a rigid grid construction and being arranged to enclose one or several propellers acting in the front part of said vessel and/or ...	10/25/1983
4223627	Propulsion device for embedding in an iceberg The device comprises an assembly of three principal components, a member for embedding in the rear wall of a tabular iceberg at some depth below the water line, a support structure projecting therefrom and a propulsion unit. It preferably includes a shiel...	09/23/1980
4106425	Marine propulsion unit with protected screw The screw of a marine propulsion unit is mounted in a passage of an elongated casing in an axially central position. The two axially terminal portions of the passage contain protective devices for preventing accidental insertion of a limb of a human adult...	08/15/1978
4078516	Propeller guard A cage-type enclosure is provided for the lower end portions of the upstanding power leg of an outboard marine propulsion unit from which the propeller of the unit is journaled with the cage enclosing the propeller and thus protecting the latter from foul...	03/14/1978
4070984	Outboard motor and weed guard therefor An outboard motor provided with a horizontally elongated marine propeller drive housing having a shaft journalled therein and a marine propeller mounted on the rear end of the shaft. A weed guard is mounted on said rear end of the housing and surrounds an...	01/31/1978
4013033	Weed guard for trolling motors A truncated cone-shaped hollow body is provided and defined by a plurality of graduated size and axially spaced circular band portions interconnecting with a plurality of elongated circumferentially spaced slant height extending band portions with general...	03/22/1977

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Class 440/72 - Cage or screen