Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7587843 | Portable ice resurfacing device and method An apparatus and method for resurfacing an ice surface. The apparatus includes a chassis and a reservoir for holding water to be dispensed via a dispensing tube in fluid communication with the reservoir. A scraper assembly attached to the chassis includes a scraper ... | 09/15/2009 |
| 7571557 | Ice-removing device An ice-removing device for removing ice from a ground surface. The ice-removing device comprises a frame and an ice cutting mechanism. The ice cutting mechanism is attached to the frame and is adapted to spin on a first axis oriented transversally to the frame. The ... | 08/11/2009 |
| 7124835 | Agricultural machine comprising a towed support frame and rollers provided with a set of dome profile pneumatic tires The machine comprises a given number of roller pairs respectively connected to the machine frame by a linking part (32). The linking part (32) of each roller pair is adapted so as to enable the rollers (12a, 12b) to incline ... | 10/24/2006 |
| 6948266 | Vehicular arm assembly The present invention relates to a device particularly suitable for grooming/shaping various snow terrain features used by recreational snowboarders and/or skiers and includes an adjustable arm assembly (2) attachable at one end to a suitable vehicle and bein... | 09/27/2005 |
| 6874259 | Device for preparing snow A device for working a snow surface, includes an endless flexible band, snow-working members arranged on the outside of the band, support elements for supporting and guiding the band, drive elements capable of moving the band around the support elements. Shaping ele... | 04/05/2005 |
| 6813848 | Method for ploughing snow and a snow plough A method of plowing snow from a site using a snowplow with at least two plow blades (5) forming together a plowing angle and there being on the plowing site fixed objects, such as airport lamps (1), rising over the site surface. In the method, when the... | 11/09/2004 |
| 6671983 | Snow groomer assembly A snow groomer includes a movable platform, a prime mover mounted to the platform and a grooming drum rotatably driven by the prime mover for rotation in a direction opposite the traveling direction of the snow groomer. The grooming drum includes axially ... | 01/06/2004 |
| 6418645 | Milling unit for the beating of snow-covered slopes A milling unit for the beating of snow-covered slopes consisting of a box-shaped structure comprising a central part to which two side parts are connected by hinging elements, in order to allow for oscillation. The structure has two hooking elements for i... | 07/16/2002 |
| 6154985 | Retractable pivoting scraper blade for snow blower A device is disclosed, for use with a snow blower being of the type having an auger, and allow it to operate while moving backwards. The device principally consists of a concave blade mounted on a snow blower, which pivots between an operative position wh... | 12/05/2000 |
| 6085445 | Piste-preparation device A piste-preparation device for preparing a half-pipe comprises at least one tool adjustably mounted on a piste vehicle, and lateral members which are laterally disposed relative to the tool and can essentially be assigned to side walls of the half-pipe. T... | 07/11/2000 |
| 5974704 | Core-type snow remover A snow removal device and method includes a core having provision for adhering snow to the core. This includes recesses which receive packed snow. Snow to be removed contacts the packed snow and adheres to the core. The core is rolled on a portion of a su... | 11/02/1999 |
| 5809671 | Tiller with adjustable depth cutter and snow comb entry angle A snow tiller for ski slopes having rotating cutter bars with outstanding teeth. The cutter bars are each installed beneath a cover which directs the snow rearwardly to a snow smoothing comb. Each cover is adjustable in geometry to provide either greater ... | 09/22/1998 |
| 5632106 | Tiller with adjustable depth cutter and snow comb entry angle A snow tiller for ski slopes having rotating cutter bars with outstanding teeth. The cutter bar is installed beneath a cover which directs the snow rearwardly to a snow smoothing comb. The cover is adjustable in geometry to provide either greater or less ... | 05/27/1997 |
| 5581914 | Snow cutting tooth for rotating cutter bar of ski slope tiller A snow cutting tooth design and an associated cutter assembly design incorporating such teeth, wherein the tooth is constructed with a unitary body of steel plate welded to the outside surface of a tubular cutter bar, with bevelled edges creating acute sn... | 12/10/1996 |
| 5469645 | System for recovery of oil from snow and ice surfaces A land vehicle system for collecting crude oil and other contaminants which have been spilled on snow and ice covered surfaces includes a crawler tractor having an auger type collection and transfer mechanism mounted forwardly thereof for skimming the con... | 11/28/1995 |
| 5106165 | Fragmentation apparatus A layer of material such as pavement or sheet ice coating the surface of a roadway is efficiently removed using apparatus that includes a longitudinal tube in a breaker assembly which is rotatably carried by a control frame beam that depends from an artic... | 04/21/1992 |
| 5084992 | Snow tiller with compactor pan A snow grooming device for ski slopes, being a snow tilling apparatus with a toothed, selectively powered tiller bar, along with a compactor pan which may be releasably attached beneath the tiller bar to convert the device from a tiller into a snow compac... | 02/04/1992 |
| 5067264 | Flexible rotary snow tiller The flexible tiller has a center and two end sections, each including a cutter bar, frame, apron and grooming bar. The two tiller end sections are connected flexibly to the ends of the center section by frame to frame hinges and by cutter to cutter univer... | 11/26/1991 |
| 4914923 | Method of covering artificial alpine- or nordic-skiing tracks with snow and means for implementing the method Method for covering with snow artificial slopes for downhill or cross-country skiing, comprising the formation of an ice layer forming the bottom of the run, the on site production of snow by machining said ice layer by forming chips having a predetermine... | 04/10/1990 |
| 4897941 | Snow grooming comb An improved snow comb for use attached to the trailing edge of tiller skirts and the like. The comb has lateral rows of axially elongate teeth projecting downward from a plate attached to the skirt. The teeth are tapered forwardly, and are alternately lon... | 02/06/1990 |
| 4892154 | Ground-working apparatus with rotary tiller A ground-working implement which comprises a rotary tiller or like groundosening unit and a smoothing board located behind the tiller. Both the unit and the smoothing board are subdivided generally centrally and the sections are connected by a ball and h... | 01/09/1990 |
| 4888891 | Levelling attachment The invention relates to a track maintenance vehicle having a levelling attachment secured to a transverse carrier member at its rear. The levelling attachment faces downwards and is at least partially flexible. For achieving satisfactory levelling of rel... | 12/26/1989 |
| 4860465 | Snow grooming vehicle and attachments A vehicle for use in ski-area snow grooming operations and also for use in summer maintenance operations which is provided with a four-wheel hydrostatic-drive transmission and four-wheel steering. The vehicle has a frame/body/engine assembly which provide... | 08/29/1989 |
| 4775014 | Ground-working implement A ground-working implement for rotary field tilling or ice or snow-tending n ski slopes or the like which is drawn by a tractor or a tracked vehicle and which comprises a holder connected to the vehicle pendulously by a longitudinal beam which can be raise... | 10/04/1988 |
| 4738037 | Track maintenance vehicle with vertically adjustable track conditioner implement, particularly a snow tiller apparatus The invention relates to a track maintenance vehicle having a levelling attachment secured to a transverse carrier member at its rear. The levelling attachment faces downwards and is at least partially flexible. For achieving satisfactory levelling of rel... | 04/19/1988 |
| 4726129 | Snow tiller The invention relates to a snow tiller for mounting on the rear of a track maintenance vehicle. The snow tiller comprises a tiller shaft and a tiller frame of at least triangular cross-section extending over the width of the snow tiller and having end pla... | 02/23/1988 |
| 4559725 | Rotary tiller for maintaining cross country ski trails A rotary tiller for maintaining cross country ski trails has a rotary shaft with at least one array of radially extending first cutters flanked by laterally adjacent arrays of radially extending second cutters. The radial lengths of the first cutters are ... | 12/24/1985 |
| 4523398 | Track former for cross country ski tracks with means to move former to transport position An apparatus for forming cross country ski tracks in a snow covered surface has a trailer frame adapted to be connected to the rear end of a vehicle. A lifting frame is connected to the trailer frame for pivotal movement about a first horizontal axis. The... | 06/18/1985 |
| 4520582 | Ski trails rotary cutter and crusher drag unit Apparatus for making ski trails which is towed and comprises a drag having a cutter unit and a snow crushing unit mounted behind the cutter unit on the drag. The units have radial blades and rotate about an axis transverse to the direction of travel of th... | 06/04/1985 |
| 4437245 | Means for making a ski trail A ski trail making means, composed of a frame for attachment e.g. behind a snowmobile and to which has been pivotally connected a drag adjustable in vertical direction, following after which is a trail planer with trail making blades side by side, after w... | 03/20/1984 |
| 4348825 | Tracking or grading unit for ski-trails and paths A tracking or grading unit for ski-trails and paths, comprises a sliding arrangement having at least one sliding or rolling front and rear support and a frame upon which the supports are mounted. The unit includes a cutting device which is adjustable in h... | 09/14/1982 |
| 4337586 | Apparatus for the handling and conditioning of snow A snow grooming apparatus for towing behind a pulling vehicle to handle and condition snow, as an example, on ski slopes or cross country trails. The apparatus includes a scraper and snow collector assembly including a scraper blade and hopper followed by... | 07/06/1982 |
| 4312142 | Device for preparing the surface of ice rinks In a mobile device for preparing the surfaces of ice-rinks with an essentially rectangular rink, an ice-scraping device for the mechanical smoothing of the ice surface and a distributing device for the even application of a film of water on the ice surfac... | 01/26/1982 |
| 4163329 | Apparatus for resurfacing a snow layer The disclosed apparatus is a machine of the type for connection to a snow skiing course maintenance tractor. It has freely-rolling rollers for compacting the snow and a plurality of scrapers arranged side by side. The scrapers are pivoted vertically about... | 08/07/1979 |
| 4056328 | Snow groomer for snowmobile trails An apparatus for grooming snowmobile trails is towed by a dirigible tracked vehicle and includes a generally horizontal main frame, a gooseneck hitch supporting the forward end of the frame in towing engagement with the tracked vehicle, a packing roller s... | 11/01/1977 |
| 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 |
