Abstract: A molded plastic landscape edging module is adapted to be joined with other modules to form a landscape border. The landscape edging module consists of an elongated, hollow body having two opposed ends. A female connector is formed in one end of the hollow body. A male connector is formed in an opposing end for interlocking with the female connector in another module to join the modules in end-to-end relationship. A pair of longitudinal stabilizing flanges extending outwardly from the sides of the hollow body and extend generally parallel to the ground. The stabilizing flanges are covered by soil when the module is inserted into the ground to stabilize the module.

Abstract: A transportable bridge having longitudinal sides, includes plural bridge sections connected in series and presenting first and last bridge sections in the series. Each said bridge section in the series includes a deck slab extending across a width of the bridge and having front and rear transverse ends, and an inverted triangular truss on each longitudinal side of the bridge. Each truss has a lower corner portion and an oppositely disposed top beam. The lower corner portion of the truss is connected to the rear transverse end of the deck slab and additionally to the front transverse end of the deck slab of an adjacent following bridge section in the series of bridge sections. The top beam of the truss of the bridge section is connected to the top beam of the adjacent following bridge section thus forming a trough-shaped bridge having a lateral truss structure. A further deck slab is associated with the last bridge section.

Abstract: A garden rake with self cleaning capabilities comprising a frame member having a near end with a handle and a far end with projections terminating in annular bearing members, the annular bearing members spaced from each other and with the holes having a common axis perpendicular to the axis of the handle. A tine bar is provided in an elongated configuration with ends positioned within the holes for rotation. The tine bar has bearing surfaces adjacent to the bearing members to preclude lateral movement of the tine bar with respect to the handle. The tine bar also has downwardly extending tines spaced along the tine bar generally perpendicular to the plane containing the axes of the handle and the holes. A spring in a generally coil configuration with an extension is further provided. The coil of the spring is positioned over one short projection between the bearing surfaces with the extension extending into contact with the tine bar at one end to preclude the forward rotation of the tines.

Abstract: A deep, free-standing, convertibly subdivided plant container adapted particularly for use in growing deep rooted plants. The container comprises an outer case having a floor comprising a plurality of bands arranged in a selected pattern as required to form ventilating openings. An inner, removable divider comprises a plurality of telescoping, interfitting plates having a cross sectional pattern predetermined to position the plates in bearing engagement with the bands when the divider is inserted in the case. Means also are present for manipulating the divider and for stabilizing it against displacement during use.

Abstract: Well apparatus is disclosed in which a tool is lowered on a pipe string into a well conduit for shifting a sleeve slidably mounted within a tubular housing connected as part of the well conduit. The sleeve has vertically spaced grooves about its inner diameter, and the tool has latches which are selectively moved into and out of engagement with a selected groove in the sleeve in response to the control of the pressure of fluid within the tool. When engaged in a groove, the tool may be raised or lowered with the pipe string to raise or lower the sleeve.

Abstract: A sub-surface release plug assembly for use in cementing an outer casing annulus around a well casing. The plug assembly comprises non-metallic materials, and in particular, high-strength engineered plastics. A method of drilling out the plug assembly using a drill bit with no moving parts is also disclosed.

Abstract: Fluid production or injection wells may be used to transmit or receive seismic signals by lowering a signal transmitting device within a tubing string disposed in the well and exerting a pressure fluid force on a free bottom end of the tubing string to cause the tubing string to helically deflect within the well and engage the wellbore wall firmly over a large portion of the tubing string to enhance the quality and intensity of the signal transmitted between the transmitting device and the earth formation penetrated by the well.

Abstract: A mechanism for collecting grass clippings cut by a cutting unit, including a laterally extending member or rail coupled with the cutting unit, a clippings container or basket positioned for receiving clippings cut by the cutting unit, first and second laterally spaced hook members operatively coupled with the container for engaging the laterally extending member to operatively couple the container with the cutting unit, said mechanism allowing an operator standing at one side of the vehicle to disengage the nearest hook member from the rail to slide the container toward himself while the other hook member slides along in engagement with the rail, thereby facilitating removal.

Abstract: Conformable marking sheet comprising a microporous thermoplastic polymer base sheet having a network of interconnected pores. The marking sheet has a low yield stress, making it conformable to rough surfaces. The pores of the base sheet can be filled with a diluent (wax) or they may have the diluent removed, for example by extraction. The construction may further comprise an adhesive on the bottom and a top marking indicium layer comprising a polymeric binder in which is partially embedded a multiplicity of retroflective lens elements, e.g., transparent microspheres.

Abstract: The filter of the present invention overcomes the aforementioned problems by separating gas and solid particulate matter from liquid as the wellbore fluid passes through the filter. The apparatus comprises a solid tube encased in a perforated tube which extends beyond the end of the solid tube. A top cap is attached to one end of each tube and holds the tubes concentric to each other. A bottom cap is attached to the end of the perforated tube which extends beyond the solid tube. An annulus is defined by the inner surface of the perforated tube and the outer surface of the solid tube. The top cap has a bore extending therethrough which is in fluid communication with the solid tube. The filter is generally used in conjunction with a low volume pump located adjacent to and in fluid communication with the top cap. As the pump operates, wellbore fluid is drawn through the perforations of the perforated tube into the annulus between the perforated and solid tubes.

Abstract: A sand filter for use in a well is provided employing a length of perforated tubing. A tubular wedge wire screen is telescopically positioned on the tubing covering the perforations. A plurality of tubular corrugated filter elements are then positioned on the wedge wire screen in end-to-end relationship. Each of the filter elements is formed of diffusion bonded multiple layers of wire mesh and each of the filter elements is corrugated to provide an external surface having an area at least three times the area of the cylindrical external surface of the tubular wedge wire screen that is encompassed by each filter element. The corrugated filter elements are secured on the wedge wire screen and welded in abutted end-to-end position.

Abstract: A well testing tool for use in high pressure wells where it is desired to pressure test the equipment includes a mandrel that is ported to the interior of the test string. The ported mandrel allows pressure to equalize between the interior of the string and an annular chamber formed between the mandrel and the tool housing, and thereby eliminates the tendency of the mandrel to deform into the chamber.

Abstract: A tree stand container for holding water for a cut tree which is mounted on a tree base of horizontal support members. The container has a plurality of integrally connected container segments extending radially from a central portion. The container segments have a generally horizontal bottom surface and side walls extending generally vertically from the bottom surface. The side walls of the container segments are coextensive with, and define, the exterior side walls of the container. The container forms a top opening to receive a tree base and to maintain the base and the lower end of a cut tree in water.

Abstract: A mowing apparatus is provided by a reel-type or rotary mower towed by a vehicle, such as a bicycle, by a draw bar adapted to mount onto existing mower brackets and onto the vehicle by a connector that mounts to a frame element of the vehicle. The draw bar includes a resilient element that preferably permits flexing relative to the vehicle so that the mower articulates relative to the vehicle and so that a normal load force may be applied to the mower. The connector is preferably adjustable to allow selective variance in the load force applied. The draw bar may be a single arcuate piece utilizing a spring as the resilient element. Alternatively, the draw bar may be one or a pair of stiff, yet resilient arms. A guard portion may be provided as an extension of the draw bar or as an auxiliary piece, and a grass shield may be employed.

Abstract: An economic and practical system for enhancing plant growth by delivering gaseous carbon dioxide to the plants. The vegetation is planted within an elongated trench preferably in an overstocked condition whereby the vegetation is permitted to grow sufficiently to define a closed canopy. The carbon dioxide-rich gas may be delivered to the trench by conduits beneath the level of the canopy. The trenches can include a floor and side walls which extend vertically upwardly and divergently from each other to restrict the flow of air beneath the canopy thereby minimizing the dilutive effects of the atmosphere. The trenches can also be oriented generally perpendicularly to the prevailing wind direction to minimize the tendency of the wind to carry off the carbon dioxide.

Abstract: A capsule for insertion into a bore includes a plastic container having a shank portion with one internal cavity having at least one end opening. The one internal cavity contains one chemical agent. A head element is integrally formed with the shank portion. A plastic plug sealingly closes the internal cavity. The plug is insertable into an end opening of the one internal cavity so as to provide a tight fit between the plug and the end opening. Another internal cavity is defined so as to be isolated from the one internal cavity. The other internal cavity contains another chemical agent. The shank portion has a plurality of recessed slots which are formed in the exterior surface thereof at circumferentially equal spacings.

Abstract: A locking mandrel is provided for use in downhole assembly and comprises a cylindrical body (12) having an annular series of openings (20) in which locking keys (21) are movably positioned, the keys (21) being biased radially inwardly, and an inner mandrel (13, 14) for moving the keys (21) from a withdrawn primed condition to an extended set position. Additionally the body (12) includes a series of movable no-go members (22) below the keys (21) which are extended in the primed condition so as to be engageable with a no-go ring (R2) on a downhole tubing string to axially arrest the body.

Abstract: A vinyl walkway paver, particularly the one used as a paving stone with grass contained therein. The paver can be integrally formed to have a surface with a plurality of ridged bodies which are different in sizes. The center of the paver is a recessed portion, the four sides of the recessed portion form a hollow frame, the corners joining the diagonals of the frame are provided with corner holes and corner blocks. By such configuration, a plurality of pavers can be laid on the walkway, the central recessed portion thereof can be filled up with soil for planting grass. Moreover, the interior wall of the hollow frame can be provided with a plurality of ribs to form a suitable rough surface for strengthening the structure of the paver. Expansible materials such as polystyrene can also be filled inside the frame to give a better bonding structure.

Abstract: A mill assembly having a mill face for milling material in a downhole milling operation is received in a casing or well bore having an internal wall having a first diameter. The mill face has a smaller diameter than the first diameter. The mill face is connected to a shaft assembly including a shaft and a stabilizing assembly for stabilizing the shaft in the casing or the well bore. The stabilizing assembly is connected at one end to the mill face and has a smaller diameter than the first diameter. The stabilizing assembly includes a stem having one or more tapered surfaces, the tapered surfaces tapering from a first diameter to a second diameter larger than the first diameter. The stabilizing assembly further includes a plurality of roller bearings circumferentially arranged in a plane around the stem, each roller bearing being in contact with one of the tapered surfaces at a first point.

Abstract: A slotted rail terminal for highway guardrails. The rail of the terminal contains at least one slotted section extending along the rail and having at least one longitudinal slot of a size sufficient to reduce the ability of the rail to resist bending in response to a loading from one end or the side of the rail. A slot guard is provided which is adapted to be attached to the rail on the side facing away from the highway and downstream of each slotted section relative to expected longitudinal loadings on the rail. The slot guard is configured to abut the rail and span its respective slotted section so as to resist enlargement of each slot. The slot guard enables the slotted section to resist and oppose lateral impacting forces such that the slotted section of the guardrail will act to substantially redirect laterally impacting vehicles.