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| Number | Title | Issue Date |
| 5251430 | Cutter and housing assembly for lawn mower A cutter and housing assembly for a lawn mower has a cutter having a plurality of blades disposed dispersely as viewed in plan, and a cutter housing accommodating the cutter therein and having at least an upper panel and a side grass clipping discharge ou... | 10/12/1993 |
| 5085043 | Electro-mechanical interlock and module system for lawn mower or other electrical device An electro-mechanical interlock and module system for an electrically powered device such as a cordless, electric lawn mower that includes a normally open interlock switch for controlling the enabling of the power circuit for the lawn mower. A key member ... | 02/04/1992 |
| 5044444 | Method and apparatus for chemical treatment of subterranean well bores An apparatus for effecting chemical treatment of any selected portion of a subterranean well bore comprises a pair of vertically spaced, inflatable packing elements which are run into the well on a fluid conduit, such as continuous tubing. The apparatus p... | 09/03/1991 |
| 5044440 | Underwater station for pumping a well flow The invention relates to an underwater station for pumping a well flow, comprising a separator for separating the well flow into liquid (oil/water) and gas, a pump assembly comprising a pump with a motor, and a compressor assembly comprising a compressor ... | 09/03/1991 |
| 5020600 | Method and apparatus for chemical treatment of subterranean well bores An apparatus for effecting chemical treatment of any selected portion of a subterranean well bore comprises a pair of vertically spaced, inflatable packing elements which are run into the well on a fluid conduit, such as continuous tubing. The apparatus p... | 06/04/1991 |
| 5020593 | Latch ring for connecting tubular members A device for releasably locking an inner member within the bore of a tubular outer member holds load in upward and downward directions. The inner member has a grooved profile on its exterior. The outer member has a grooved profile in its bore. A split lat... | 06/04/1991 |
| 5018589 | Process for finding the depth of a lost return zone In a process of downhole drilling in an open hole, where the drill bit has struck a lost circulation zone in the wall of the formation, and mud circulating through the annulus during drilling has been lost into the zone and therefore circulation of the mu... | 05/28/1991 |
| 5018580 | Section milling tool A milling machine is set forth for operation on a pipe string in a cased well to mill the casing. In one embodiment, an inner mandrel having a shoulder is aligned relative to a set of first cutters which are retracted. They are radially extended through s... | 05/28/1991 |
| 5012864 | Wellhead apparatus involving a free fall plunger in a well Wellhead production apparatus is set forth. It is adapted to be connected to a cased well having a production tubing string therein. It cooperates with a plunger traveling freely in the production tubing string. The wellhead apparatus connects typically t... | 05/07/1991 |
| 5009274 | Laterally adjustable drilling tool A drilling tool is followed by a casing tube (11) down the drilled hole. The mouth of the casing tube (11) centers rotatably a guide member (10) which receives rotation and impact energy via the interior of the casing tube (11). A drill bit (20) consists ... | 04/23/1991 |
| 5007486 | Perforating gun assembly and universal perforating charge clip apparatus A perforating gun assembly and universal perforating charge clip apparatus in which a universal design of the charge and the charge clip include trapping of the detonating or firing cord, a lock-in position of the charge in both the raidal and transverse ... | 04/16/1991 |
| 5007234 | Automatic self-guiding lawn mower and mowing method An automatic self-guiding lawn mower includes a carriage having first and second sets of electric motors mounted thereon. A blade is operatively connected to and driven by each one of the first set of electric motors for cutting grass, and a wheel is oper... | 04/16/1991 |
| 5005343 | Header for a combine harvesting machine A flexible header for a combine or swather includes a pair of wing sections which can flex relative to a central section. Each wing section carries a draper canvas for transporting a cut crop inwardly toward the central section. Beneath the inner ends of ... | 04/09/1991 |
| 5004057 | Drill bit with improved steerability A drill bit offering improved steerability. Drill bits include gage sections which are adapted to facilitate deflection of the bits within a borehole to facilitate navigational or directional drilling. The gage portions of the bit may be arranged in an ar... | 04/02/1991 |
| 5003757 | Close-trim mower deflector A close-trim discharge deflector for a lawn mower is disclosed. The deflector is pivotable both horizontally and vertically at its leading edge using a T-shaped swivel. The shaft of the T provides one hinge pin and the cross piece incorporates the other. ... | 04/02/1991 |
| 5003760 | Garden tool A combination cultivator, rake and hoe having cultivator tines of uneven length parallel to one another and inclined with respect to the handle. A hoe blade, preferably with a sharpened forward edge is connected on one or both ends of the row of cultivato... | 04/02/1991 |
| 5001894 | Bearing guard for compost turner A compost turner including a rotatable mandrel supported by a shaft and at least one bearing includes a guard for reducing the tendency of polymeric garbage bags to wrap around the mandrel shaft and foul the bearing. The guard includes stationary cutting ... | 03/26/1991 |
| 5000719 | Retrievable sealing plug and method of making same A removable sealing plug for the bore of a high pressure oil or gas well incorporating at least one expandable sealing ring mounted on at least one plug part so as to be frictionally engageable with the surface of the bore and a rotatable plug part screw-... | 03/19/1991 |
| 4999981 | Mower with assembly of cutting elements The shaft 20 of a rotary cutting element 10 driven from below includes a break zone 41 at its end 19 extending upwardly outside the bearing 24. The rotary cutting element separates entirely from the cutting bar when the shaft breaks at the break zone upon... | 03/19/1991 |
| 5000261 | Inflatable devices for suspending explosives in boreholes Inflatable devices configured for supporting explosives particularly in vertical boreholes of widely varying diameter. The inflatable devices of the invention can be used in the pre-splitting and blast removal of earth formations by suspending explosives ... | 03/19/1991 |
| 4999983 | Corn harvester A harvester especially adapted for removing ears of sweet corn from stalks which are severed and enter the harvester, rather than being ejected by the snapping rolls of a primary ear stripping mechanism of the harvester, uses stalk engaging belts which br... | 03/19/1991 |
| 4999986 | Fruit decelerator A fruit decelerator having a plurality of adjacent resilient rollers able to receive substantial quantities of fruit free-falling a distance of at least four feet without harming the fruit; wherein there are gaps between some of the adjacent rollers; wher... | 03/19/1991 |
| 4998948 | Lawn mower A lawn mower comprises a riding and a steering frame pivotally connected to an engine and cutter assembly which includes an engine and transmission mounted on an engine deck and cutter blades driven by the engine and mounted below the cutter deck. The ste... | 03/12/1991 |
| 4996833 | Foldable haymaking machine having a plurality of rotors This invention relates to a haymaking machine comprising several tedding and/or windrowing rotors which are connected to a carrying frame having a central section and side sections which are connected to one another. According to the invention, each side ... | 03/05/1991 |
| 4996829 | Lawn mower with blower A riding lawn mower comprises a frame supported by wheels, a mower housing carried at the underside of the frame, a plurality of cutter blades located within the mower housing to cut grass, a collection bag mounted on the rear of the frame, a discharge ch... | 03/05/1991 |
| 4995228 | Cutting blade for rotary cutting machinery A rectangular metallic plate cutting blade having an opening at the center thereof for attaching the plate to a rotary power shaft. A pair of trapezoidally-shaped cutting recesses are cut into the leading edges of the blade. The edges of the plate definin... | 02/26/1991 |
| 4993994 | Sealing construction of a tensioner The sealing of an inserting hole portion of a casing base portion side is performed by an elastic sealing member. In a tensioner in which a rotation body and urged body are provided within the casing in a screwed state and the urged body advances in an ax... | 02/19/1991 |
| 4993216 | Cotton harvester mounting and supporting system with high lift capacity A system for mounting and supporting cotton harvesting units for vertical displacement on a forward end of a cotton harvester frame. The mounting and supporting system includes a parallelogram-type linkage assembly for connecting the harvesting units to t... | 02/19/1991 |
| 4991994 | Highway traffic lane and edge delineator A generally L-shaped, single piece resilient polymer-based pavement marker including a horizontially extending base, a vertically extending leg tapering inwardly as it rises from the base with a rear face extending from a lower edge of the base below a to... | 02/12/1991 |
| 4991382 | Lawn mower A lawn mower has a hydraulic motor mounted on each drive wheel and each motor is independently driven by a separate pump. Each pump includes a control lever for regulating fluid pressure and flow direction so that each wheel may be driven independently in... | 02/12/1991 |
| 4991670 | Rotary drill bit for use in drilling holes in subsurface earth formations A rotary drill bit for use in drilling holes in subsurface earth formations comprises a bit body having a shank at one end for connection to a drill string and an operating end face at the other end. A plurality of first cutting structures, each comprisin... | 02/12/1991 |
| 4989678 | Soil sampling kit and a method of sampling therewith A soil sampling device and a sample containment device for containing a soil sample is disclosed. In addition, a method for taking a soil sample using the soil sampling device and soil sample containment device to minimize the loss of any volatile organic... | 02/05/1991 |
| 4989679 | Centering device that can be engaged or disengaged, specifically for a drilling assembly A centering device for an assembly, particularly for drilling, having at least one centering device relative to which the assembly rotates. A driving arrangement is provided for rotationally driving the centering device, with the driving arrangement inclu... | 02/05/1991 |
| 4987733 | Christmas tree shaker A machine for shaking Christmas trees to remove loose needles therefrom. The machine includes a frustoconical holder for receiving the trunk of the tree and adapted to be orbited by a power-rotated shaft in order to shake the tree. A flexible belt is conn... | 01/29/1991 |
| 4987732 | Mowing apparatus having oppositely reciprocating cutters To mow even soft grass more tidily in shearing mode without kicking pebbles, a pair of two grass cutting wheels are pivotally driven by an engine in two mutually-different directions. One cutting wheel is slidably fixed relative to the other cutting wheel... | 01/29/1991 |
| 4987730 | Device for picking pulse crops The invention relates to a device for picking pulse crops, said device being provided with a frame, with a picking drum having teeth, which is supported by the frame and which is rotatable about a substantially horizontal axis of rotation, and with a guid... | 01/29/1991 |
| 4986060 | Modular rotary mower cutterbar incorporating unique idler gear mounting A rotary mower includes a cutterbar having a fluid-tight gear housing made up of a plurality of identical gear housing sections connected together in end-to-end relationship with each other. Each section is a casting including spaced apart top and bottom ... | 01/22/1991 |
| 4986061 | Mower with skids A mower according to the invention includes a mowing group provided with a cutting bar and skids. The rear connection of each one of the skids includes connection means that allow the rear part of the skid to separate from the cutting bar in a relative mo... | 01/22/1991 |
| 4986799 | Transmission chain with pivot pins and intermediate pieces with rolling contact action Transmission chain for a cone pully drive, with intercoupled links and pivot pins inserted through link openings of which the end surfaces cooperate with the cone surfaces, where between each pivot pin, on the one hand, and the opposite opening sides of a... | 01/22/1991 |
| 4984636 | Geothermal wellhead repair unit A geothermal wellhead repair unit including a mechanically set packer to isolate the wellhead for removal and repair thereof. The packer is run into the well string using a running tool. The packer is set by placing tension on the mandrel to set the packi... | 01/15/1991 |
