Class 172/393 - Spaced parallel runners with tool mounted therebetween

Subclass of Class 172 - Earth working
Definition: Apparatus in which the wheel substitute comprises a pair
No. of patents: 25
Last issue date: 12/27/2011

Number	Title	Issue Date
8083005	Land leveling device A land leveling device for leveling uneven surfaces. The land leveling device generally includes a frame adapted to be removably attached to a tractor. The frame will generally include a rear support, a first side support extending in a forward direction from a firs...	12/27/2011
7273111	Grading implement A grading implement including main body having a left end, a right end and a length that extends between the left and right ends. The main body also includes a front side and a back side. A claw-blade is positioned at the front side of the main body. Side blades are...	09/25/2007
7267062	Adjustable pile height mechanism and method for adjusting the pile height of a tufted floor covering An adjustable pile height mechanism for producing a tufted floor covering comprising an adjustable bed plate, a cam shaft, and a plurality of eccentric cams mounted on the cam shaft so as to contact the bed plate. The cam shaft is adapted to be rotated so as to rota...	09/11/2007
7063166	Earth grooming device An earth grooming device for attachment to a vehicle includes a rectangular frame having a plurality of teeth secured to the front thereof to form a rake and a scraper blade secured to the rear of the frame. A side rail is attached to each side of the frame with eac...	06/20/2006
6913086	Skimmer Apparatus and method for shearing a soil layer and removing it is provided. An apparatus in accord with the present invention has a frame mounting a shearing blade reciprocally movable substantially vertically into an operational position where the shearing blade wi...	07/05/2005
6425196	Folding pusher The present invention is an apparatus for use on large areas such as parking lots and airport runways to remove snow and other debris or material therefrom. The apparatus includes at least two blades pivotally connected to one another, and mounting recept...	07/30/2002
6308785	Adjustable grader-spreader bar An adjustable grader-spreader bar with a three-point hitch has a blade frame assembly comprised of a plurality of blade frames, each blade frame having a blade edge fastened at the bottom. The blade frames are slideably connected so that the blade frames ...	10/30/2001
6112438	Snow plow A snow plow includes a central blade and left and right end blades pivotally connected to the ends of the central blade for movement between open positions in line with the central blade, and folded positions forward of the central blade. The rear of the ...	09/05/2000
6094845	Snow-handling trail-grooming device This invention concerns a snow-handling trail-grooming device. The invention comprises a sled including at least one runner member, a sled front end, a sled back end and an open-ended longitudinal cavity therethrough open at opposed longitudinal ends ther...	08/01/2000
5397200	Spreader/grader with adjustable transverse blades A spreader/grader attachable to a three point hitch of a tractor and including a pair of longitudinally extending, parallel, transversely spaced side pans or frame members oriented in fixed relation to each other and operatively connected to a three point...	03/14/1995
5332331	Combination spreader/grader apparatus An improved spreader/grader apparatus having a pair of substantially parallel sidewalls, spaced apart, and supporting at least two spreader/grader blades therebetween. There would be provided a hydraulic or manual adjustment member connected to at least o...	07/26/1994
5191943	Three-point hitch attached grader with adjustable blades A grader especially adapted for use in association with a tractor having a three-point hitch with the grader being capable of use in cutting, moving, spreading and leveling all types of soil, aggregate and the like. The grader can also be used to carry, s...	03/09/1993
5072531	Ground shoe for snow blowing vehicle A pair of road-sliding skates for mounting onto a front-loaded, snowplow, automotive vehicle are provided, to prevent damage to the structural integrity of the vehicle when rolling on a high-crowned road, yet enabling unhampered snowblowing operation of t...	12/17/1991
5027533	Vibratory shellfish harvesters and methods Shellfish harvesting devices including a frame to move over the submarine surface of a shellfish growing substrate and a plurality of tines extending down from it for penetration into the substrate, are improved by addition of a vibrator to impart a vibra...	07/02/1991
4788783	Ski-track forming apparatus The present invention relates to a ski-track forming apparatus with a track-forming unit (1) having two parallel track-forming tools (2), extending in the track direction. In order to form a ski-track, when a ski course is formed, along the ideal line of ...	12/06/1988
4756100	Cross country ski track grooming device A cross country ski grooming device comprising a track sled adapted to be towed by a vehicle in the direction of the track and having a pair of spaced apart tracking elements on the underside of the sled oriented in the direction of the track. Each tracki...	07/12/1988
4630686	Earth scraper for use with a small tractor An earth scraper for use with a small tractor having a draw bar, the scraper being formed of a generally horizontal frame, the forward end being attachable to a ball hitch or the like on the draw bar of a tractor, the frame supporting an elongated blade o...	12/23/1986
4539765	Trench backfill device A device for backfilling a trench from spoil left alongside it comprises a forecarriage (7) and a main frame (10). The former comprises means (12) for positioning it centrally in the trench (3). The latter is located behind the former and carries one or m...	09/10/1985
4441266	Skid shoe mounting arrangement for snow blower A skid shoe mounting arrangement detachably mounted to the side of the snow blower auger housing such that the skid shoe mounting assembly can be easily reassembled to a plurality of preset heights relative to said auger housing....	04/10/1984
4425723	Clam dredge A shellfish dredge includes a pair of longitudinally extending parallel and spaced apart runners having a collecting bag mounted adjacent the rear thereof. The runners support a frame comprising a pair of longitudinally extending spaced apart skids and at...	01/17/1984
4320988	Spreader/grader A spreader/grader is attachable to a three-point hitch associated with a tractor and includes a pair of curved cutting blades which are adjustable so as to control cutting depth. The cutting blades are mounted between a pair of side runners and include cu...	03/23/1982
4151701	Turf thatcher A turf thatcher having a mobile frame including a shaft on which a plurality of springs are mounted and extend down to the turf for dragging through the turf and removing the thatch therefrom. A pawl is movably mounted on the frame and is in a dragging po...	05/01/1979
4057916	Snowmobile trail leveler A trail leveler for smoothing snowmobile trails including a multi-blade rotating member positioned transversely to the path of the leveler and rotating in the direction opposite to the direction of travel of the leveler; and the leveler including a yoke-s...	11/15/1977
4021942	Snow handling and conditioning apparatus Apparatus for towing behind a tow vehicle to handle and condition snow on ski slopes, including a ripper assembly having teeth for ripping the surface of the snow, a scraper assembly for scraping the surface of the snow and to redeposit quantities of accu...	05/10/1977
4014116	Long-distance ski-track ploughing device This invention proposes a long-distance ski-track-ploughing device comprising a track sled adapted to be towed by a vehicle in the direction of the track, the underside of the said sled being equipped with tracking elements oriented in the direction of th...	03/29/1977

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Class 172/393 - Spaced parallel runners with tool mounted therebetween