U.S. patents available from 1976 to present.
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...that it was melting ice cream that inspired the invention of the outboard motor? It was a lovely August day and Ole Evinrude was rowing his boat to his favorite island picnic spot. As he rowed, he watched his ice cream melt and wished he had a faster way to get to the island. At that moment the idea for the outboard motor was born!

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Class 30/276 - Rotary blade


Subclass of Class 30 - Cutlery
Definition: Implements in which the blade is given a rotary movement
No. of patents: 813
Last issue date: 05/15/2012


  2                    
NumberTitleIssue Date
7493697Lawn mower
A lawn mower comprises an operation arm, a driven shaft rotatably supported inside the operation arm and having two opposite ends, a cutter operatively connected to one end of the driven shaft, a power source operatively connected to the other end of the driven shaf...
02/24/2009
7480998Bush cutter
A cutter is coupled to a tip of a driven shaft rotatably attached in an operating arm as a main body of a bush cutter, and the other end thereof is provided to a driven side coupling portion selectively coupled with any one of a driving side coupling portion of an e...
01/27/2009
7467470Trimmer with replaceable line cartridge
An improved line trimmer (10) for weed or grass cutting is provided which includes a operating head (16) having a rotatable housing (44) with cutting line outlet openings (68). A replaceable line cartridge (18) having a supply (...
12/23/2008
7458161Rotary cutting device
A horticultural or agricultural cutting device is disclosed which comprises a body (4), a rotor (20) rotatably coupled to the body, at least one cutter (54), (56) which rotates along with the rotor and extends radially to the axis of rota...
12/02/2008
7458162Device for a portable tool
The claimed invention relates to an engine powered portable tool comprising a working tool placed on a working tool carrier clamped to a tool casing (10). In order to increase the strength in the section where the working tool carrier is clamped to the tool c...
12/02/2008
7412768Invertible trimmer line spool for a vegetation trimmer apparatus
A vegetation trimmer comprising an elongate main handle to which is connected a motor that rotatably drives a trimmer head located at a distal end of the handle. The trimmer head defines a rotational axis and includes a housing and a spool rotatably received in the ...
08/19/2008
7406771Protective shield for a free-cutting tool
A protective shield (2) is provided for a free-cutting tool (1). The free-cutting tool has a cutterhead (4) rotatable about a rotational axis (3) and carries a cutting filament (5). For a rotating cutterhead (4), the cutting...
08/05/2008
7395601Rotary flail feeding device
A rotary flail feeding device for trimming vegetation includes a head for storing flail line and a unitary, removable subassembly comprising a winding post and a line guide ring rotatably mounted on the post. The subassembly is removed from the head to facilitate lo...
07/08/2008
7382104Backpack style power-pack with flexible drive and quick connect power take-off for connection to a variety of powered tools
The present invention relates to portable powered devices or tools for residential, commercial, or industrial applications, in which the power source may be carried on the back of the individual user, power is transferred via a flexible drive shaft, and the powered ...
06/03/2008
7370424Cutting string for plant cutting appliance
A plant or vegetation cutting device which comprises a rotary cutting head and at least one cutting filament or string extending radially from the head, such that upon rotation of the head, the string is extended by centrifugal force and cuts through the plants or v...
05/13/2008
7360312Bush cutter
A bush cutter has a driving bevel gear housed in a first box constituting a part of a gearbox, and a driven bevel gear housed in a second box and engaging the driving bevel gear. The driving bevel gear is rotatably retained in a first bearing. The first bearing is s...
04/22/2008
7347276Adjustable garden tool
A manual garden tool having an elongate shaft with an actuator rotatably mounted at its lower end, tine(s) mounted to the actuator, and a cam surface at the lower end of the shaft in contact with a surface of each tine such that, as the actuator is rotated between t...
03/25/2008
7346992Hand-held power tool with angle drive
A hand-held power tool (2) includes an angle drive (20) for connecting the motor-driven driving shaft (6) and the driven shaft (10) connected with a tooth holder (24) for joint rotation therewith, and having drive toothing (14
03/25/2008
7340840Blade housing for low friction rotary knife
A power operated knife comprises a blade supporting structure supporting an annular blade for rotation about a central axis. The blade and blade supporting structure are engagable along bearing contact locations that are spaced apart in a direction parallel to the a...
03/11/2008
7339475Portable alarm system
A monitoring system includes a portable alarm having a base unit with an electronic package. At least one sensor is associated with the electronics to transmit signals to the electronics in the event of a breach. The electronic package in turn signals a central moni...
03/04/2008
7331111Chainsaw throttle and brake mechanisms
A chainsaw is provided having a brake band disposed about a drum that rotates during advancement of the saw chain about the saw bar. An end of the brake band is biased to a position that draws the brake band tight about the drum to prevent advancement of the saw cha...
02/19/2008
7325755Rotary tool for spreading particulate materials and method of using the same
The rotary tool for spreading particulate materials from a mound of the same. The tool has an elongated shaft with a rotatable body mounted proximate a first end thereof. The body has a peripheral edge with a plurality of flexible fingers radiating outwardly therefr...
02/05/2008
7314096Adjustable handle for portable tool
A handle having an adjustable shaft wherein the overall length of the shaft and/or the angular relationship of portions of the shaft can be varied by a user of an associated tool. In one embodiment, the handle includes a first tube, a second tube connected to a work...
01/01/2008
7314462Passive needle-stick protector
The present invention relates to a needle-stick protector for an intravenous catheter having a body, a needle hub, a needle, and means for ensuring that the needle-stick protector is not removed from a catheter hub before the needle is fully retracted and locked in ...
01/01/2008
7311067Implement
A manually operated implement comprising a housing for accommodating a drive motor that drives a tool. A fan wheel is disposed in the housing and is driven by the drive motor. A fan wheel cover covers the fan wheel toward the outer side of the housing. Ribs are disp...
12/25/2007
7309054Universal clamp
A clamp assembly is disclosed including a clamp support half having an attachment end, the attachment end engaging a supporting structure, a lower clamp half releasably secured to the clamp support half, and wherein the lower clamp half accommodates an anti-rotation...
12/18/2007
7302790Adjustable spindle assembly for a grass trimmer
An adjustable spindle assembly comprising a spindle housing, a keyed spindle shaft rotatably connected to the spindle housing, a mow ball rotatably connected to one end of the keyed spindle shaft, and a string carrier assembly adjustably connected in between the spi...
12/04/2007
7299553Zero-offset power handsaw
A zero-offset power handsaw having a body unit including a skid plate and a handle, a circularly shaped saw blade, a blade mounting mechanism including a removable mounting device having a head, a guard, and an electric motor. The saw blade has a forward extremity a...
11/27/2007
7290383Trimmer blade
A trimmer blade assembly comprising a blade within a housing is provided. The housing includes a wall for propelling cut vegetation away from the blade assembly. The blade assembly may also include a ridge on the housing for further propulsion of cut vegetation away...
11/06/2007
7290340Circular cutter
A circular cutter comprising a circular blade mounted to a front end of a handle via a shaft assembly, in the handle is disposed a slide member for controlling a hood, the hood is formed with a T-shaped hole located correspondingly to a center of the circular blade ...
11/06/2007
7284301Hand tools with ergonomic hand grip
An ergonomic hand grip for a hand operated tool has a pair of spaced apart curvilinear side beams having first ends and second ends, the first ends being coupled to each other; a forearm brace coupling the second ends of the side beams to each other, the forearm bra...
10/23/2007
7284331Trimmer guard
An improved trimmer guard (15), for use with a trimmer (16) having a motor (18), a head (19) and a shaft (20), comprising a mounting assembly (23) configured to mount to a trimmer shaft, a frame (24) supported by the ...
10/23/2007
7278343Apparatus for lap seaming floor coverings
The present invention pertains to an apparatus for continuously cutting different floor coverings to form a uniform seam between them. The apparatus is particularly suited for vinyl and linoleum tile floor coverings. The apparatus is secured to a floor at a referenc...
10/09/2007
7278213Hand tool stop pin
A hand tool such as a folding knife that incorporates a blade stop pin that stops rotation of the blade in the open position is described. The stop pin defines a multifaceted face having plural surfaces, each having a radial distance from an axial centerline that is...
10/09/2007
7275325Bush cutting machine
A bush cutting machine with a tubular operating pole connected to an outlet of an exhaust muffler and doubling as an exhaust passage is provided. Exhaust gases discharged from an engine flow from the exhaust muffler through the operating pole and are then discharged...
10/02/2007
7275324Trimmer head for use in flexible line rotary trimmers having improved line loading mechanism
A trimmer head for use in a flexible line rotary trimmer including a housing adapted to be operatively connected to the trimmer to effect rotation of the head and a spool operatively connected to the housing for rotation therewith. The spool defines at least one lin...
10/02/2007
7275322Pivoting handle assembly for power tool
There is disclosed a power tool comprising a housing (3), a motor provided in the housing and having a rotary output shaft, a reciprocating output shaft adapted to be caused by the motor to execute reciprocating motion to actuate a blade assembly, and a handl...
10/02/2007
7266892Device for a portable tool such as a brush cutter
This invention relates to a device for a portable tool, such as a brush cutter or the like, comprising a shaft tube (11) that via a shaft tube securing means is connected to a drive unit (10). The shaft tube securing means comprises a first sleeve shap...
09/11/2007
7266893Filament trimmer with dual triggers
A filament trimmer includes a rotatable trimmer head having an outwardly extending filament. The trimmer has an upper handle that the operator can grip to operate the trimmer in either a trim mode or an edge mode. In the trim mode, the filament extending outwardly f...
09/11/2007
7258205Blade stop components and roller bearing clutch design for a power tool
A power tool includes a braking system that minimizes a stopping time for a cutting blade of the power tool. The braking system includes a roller bearing clutch mechanism combined with a positive stop pin. The stop pin is provided at an end portion of a cable assemb...
08/21/2007
7257898Cutting head for string trimmer
A cutting head for a string trimmer is provided which accommodates any string gauge thickness and may be easily and quickly re-threaded upon failure of a string previously disposed therein. The cutting head has spring-biased clamping members which are each mounted w...
08/21/2007
7254891Lawn cutting device
A lawn cutting device includes a handle having a hollow connecting part that has a bottom end portion defining a bottom opening and a driving member having an output shaft that is received in the connecting part of the handle and that extends outwardly through the b...
08/14/2007
7249448Stabilized agricultural apparatus
An agricultural apparatus is disclosed. The apparatus is adapted to be mounted to an agricultural machine such as a tractor and is provided with a boom having two arms extending in a direction substantially transverse to the agricultural machine. The boom arm are pr...
07/31/2007
7241084Tool assembly with universal coupling for various tools, for work on underground pipes
A tool assembly is provided for working on underground pipes, through a small hole at the pipe surface, by means of an elongate handle member that reaches into the hole, and has a coupling at the lower end thereof, whereby various ones of selected tools may be quick...
07/10/2007
7237453Acceleration pedal module with controllable friction device
A power control device for drive motors in motor vehicles, in particular an accelerator pedal, includes an operating lever which may be operated by an operating force against a return force from a rest position on pivoting about a pivot axis. A damping device for da...
07/03/2007
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