Abstract: An agricultural implement guidance control system has a counterbalanced sensing wand assembly. The wand position sensing assembly is designed to compensate for the adverse effects of operations on a field which has a side slope, i.e., slopes to the left or right of the implement as it travels in the field. Without the counterbalanced wand position sensing assembly, the wands would pivot toward the downhill side of the implement as a result of gravity acting upon the wands. Specifically, the wand position sensing assembly is designed so that the weight of the wand bracket assembly counterbalances the weight of the wands on the pivot point which is established by the rotating shaft. The wand position sensing assembly can also include a variable compensation assembly which permits the operator to adjust the counterbalance effect. The variable compensation assembly includes a shaft, a counterweight and a retention unit. The shaft is attached to the center of the U-shaped rod support.

Abstract: An edging tool includes a sleeve unit in which a weight bar is slidably received and on which a blade is mounted. The weight bar is drawn back to a cocked position by hand, and when released, impacts an impact block mounted on the sleeve unit and which is in contact with the blade so impact from the weight bar drives the blade downwardly. The blade unit has a cutting edge which is positioned adjacent to an area to be edged. The movement of the weight bar with respect to the sleeve unit is controlled by various elements on the edging tool.

Abstract: The power-take-off conversion unit of this invention is adapted for attachment to a vehicle with a driving pulley rotatable in a generally vertical plane and driving an elastic belt, wherein the vehicle has two mounting brackets located beneath the pulley. The unit has a frame with an arm that extends rearwardly from a rear portion of the frame. Two pins extending from the arm are adapted to engage within the mounting brackets on the vehicle to allow the frame to rotate about a horizontal axis. The frame has a planar locking surface extending therefrom and a cam surface which extends downwardly and outwardly from the locking surface. A driven pulley is rotatively mounted within the frame to engage with and be driven by the elastic belt of the vehicle. A belt-tensioning bar is rotatively mounted to the vehicle about a horizontal axis which is located above the locking surface of the frame.

Abstract: A height-position sensing device for use with a contol circuit for controlling the height position of a blade in the case of a motor grader includes a mechanical height-position sensor and a ultrasonic height-position sensor which are connected to a common control circuit via a switch.

Abstract: An archery bowstring release includes a body mounting a bowstring retainer hook member and a hook release lever releasably engaging the hook member and movable in the release direction by the resilient pressure of a spring interposed between the body and the hook release lever. In one embodiment the hook release lever is held in hook retaining position by thumb pressure of an archer's hand. In another embodiment the hook release lever is controlled by a trigger lever movable between a cocked position in which the hook release lever is held in hook retaining position and a triggered position in which the hook release member is disengaged from the trigger lever for movement to release the hook member. In still another embodiment a whisk hammer and fulcrum lever are interposed between the trigger lever and hook release lever, and an adjustable spring tension may be applied to the whisk hammer to vary the resistive pressure applied by the whisk hammer to the trigger lever.

Abstract: An arrow support for use with a bow having a bow string and an arrow having an arrow shaft, a nock and fletch. The arrow support includes a support base connected to the bow. A first and a second post each are connected to the support base. A first roller arm is connected to the first post and the first roller arm extends at an angle upwardly from the base a distance from the first post generally toward the second post. A second roller arm is connected to the second post and the second roller arm extends a distance generally upwardly from the base and generally toward the first post. A roller is rollingly connected to the first roller arm and a second roller is rollingly connected to the second roller arm. The first and the second rollers each extend a distance from the respective first and the second roller arms for forming first and second roller contact surfaces.

Abstract: A guidance system for an agricultural implement pulled by a tractor is disclosed. The implement, such as a cultivator or planter, has ground-engaging discs mounted to a frame or toolbar and includes a control hitch mounted to the conventional three-point tractor hitch. The toolbar of the implement is mounted to the control hitch for rotation about a vertical axis. A first sensing device senses the position of the implement relative to a desired lateral position, such as the distance from a crop row, and generates a signal representative of the displacement of the implement from that desired lateral position. The sensing device actuates a hydraulic circuit to turn the implement toolbar toward the desired position; and the discs steer the implement toward the desired lateral position. A second sensing device senses the angular position of the implement relative to the control hitch.

Abstract: A root crop harvester comprising a soil-separating primary web arranged to discharge material on to a crop-conveying second web which passes about two rollers adapted to define in the load-bearing run of the second web an overhanging step section.

Abstract: A vertical angle adjustable quick-attaching coupler for attaching an implement to the three point hitch of a vehicle. The coupler comprises a coupler frame, attachment means for pivotally mounting the coupler to the three point hitch of the vehicle, hook members for attaching the coupler to the implement, and angle adjustment means which includes a lever arm and a hydraulic cylinder for adjusting the vertical angle of the plane defined by the three attachment points of the three point hitch relative to the plane defined by the hook members of the coupler.

Abstract: An apparatus for aerating turf including a mounting frame (11) for mounting the apparatus to the hydraulic lift system (12) of a utility tractor. A trailer support frame (13) is pivotably mounted to the mounting frame (11) so as to enable the trailer support frame (13) to tilt toward and away from engagement with the turf. A plurality of rotary hoes (39) are supported within the trailer support frame (13) along a drive shaft (41). The drive shaft (41) is rotated by the power take-off (44) of the tractor, and causes the rotary hoes (39) to vibrate as the tines (58) of the rotary hoes (39) penetrate the soil so as to aerate the turf without causing compaction of the soil.

Abstract: A hydraulic stone picker adapted for use in conjunction with a modified front-end loader. The fork is pivotally mounted to the side of the front-end loader which has been modified by addition thereto of a front and extended side walls to define a collecting bin. Stones dislodged by the fork are transferred to the collecting bin by actuation of a hydraulic ram which rotates the fork from a lowered to a raised position. The apparatus is provided with support members to prevent damage to the fork during use. The linkage of the fork to the hydraulic ram includes a lost-motion connection which permits the fork to pivot during use to accommodate surface irregularities.

Abstract: The invention is designed primarily for use with resilient tine components which include a pair of resilient spring coils having an attaching U extending between adjacent ends and a resilient tine extending from the outer end of each of the resilient coils substantially perpendicular to the longitudinal axis thereof. These often wear and the most expensive replacement cost is the resilient spring coils. The present invention overcomes these disadvantages by provided a sleeve which engages over the worn ends of the tines and is secured thereto and which has a replacement tine portion secured within the other end of the tubes and extending axially therefrom thus returning the tines to their original length. The sleeves can be secured to the worn ends of the tines either by welding, set screws or other means.

Abstract: A fertilizer applicator employs a rotating, trash-cutting coulter and a knife located immediately behind the coulter with the leading arcuate edge of the knife and the rearward arcuate periphery of the coulter in intimately spaced relation to one another. As the coulter wears, the knife may be adjusted upwardly and forwardly along a slightly arcuate path of travel while simultaneously rocked slightly forwardly so as to maximize the length of the front knife edge that is close to the coulter while maintaining a substantially constant depth relationship between the knife and the coulter.

Abstract: A reversible moldboard plow has a plow carrying beam swingably mounted at the rear crossbar of a frame which carries trunnion mounted cylinders connected to the beam for moving the beam, the front of the frame carrying hitch pins for connection to a tractor hitch, the hitch pins being vertically movable in alternate relation in order to tilt the frame and the beam with the moldboards supported thereon. The hitch pins may be moved by independent cylinders and pistons or, alternately, by the movement of a transverse hitch bar on which they are mounted.

Abstract: A foldable implement carrier is disclosed including a central support bar supporting two pivotally connected tool bar sections which are movable from a laterally extended position to a folded position to reduce the width of the foldable implement carrier for transport. The tool bar sections have pivot columns which are rotationally received within a H-shaped frame member. A main wheel set is privotally connected to a frame, which includes the H-shaped member and the central support member, and is driven vertically downwardly to raise the frame off of the ground. The first and second tool bar sections are driven to pivot within the H-shaped frame member and move from the extended position to the folded position. Each tool bar section includes a latch and a wheel to secure the tool bar section to the central support bar. When folded, the latches are received upon the top of the central support bar and the wheels are retracted and abut a lower portion of the central support bar.

Abstract: A secondary containment pipe system disposed around a primary pipe system and comprising a joint that is divided along a central parting plane and has laterally projecting flanges that form internal passages for adhesive sealing cement, that is injected through ports while the joint is clamped together around secondary containment pipes. The joint has pipe sockets that have internal grooves that also are filled with injected cement, thus forming a continuous, uninterrupted seal around the interior of the joint, and also has spillover grooves and wells for minimizing leakage, and lateral aligning surfaces. The clamping means are C-shaped clips that can be left in place indefinitely. The secondary containment pipes also are divided, being formed by elongated pipe elements fitted together around the primary pipes and having snap-latching coupling means along their abutting edges.

Abstract: A portable bow press for facilitating repair and adjustment of an archer's compound-type bow is disclosed which includes a first elongated member having a threaded aperture formed centrally therein and removable structure at each end for engaging the ends of each of the bow limbs. A second elongated member is threaded through the threaded aperture to engage the handle of the bow and apply a force against the handle to remove tension from the bow string and tension cable to allow needed repairs to the various elements of the bow. A sleeve member is mounted on the second elongated member for travel therealong and includes a hook member to hold one end of a scale while the other end of the scale is attached to the center of the bow string.

Abstract: A bowstring release for balanced release of the bowstring of an archery bow includes a pair of movable jaw members. Each jaw member includes a pair of lower and upper engagement portions spaced from one another in the linear direction of the bowstring in its uncocked disposition. The upper and lower engagement portions of the jaw members are movable into engagement with the bowstring above and below the vertical midpoint of the bowstring. Accordingly, when the nock of the arrow is disposed at the vertical midpoint of the bowstring, the bowstring release device applies substantially equal drawing force to the bowstring above and below the nock of the arrow during cocking of the bowstring and simultaneously releases and bowstring with a balanced release.

Abstract: A reversible plow comprising a three point hitch, a pivotally mounted tool bar provided with a plurality of adjustable plow gangs, and gauge wheels wherein said tool bar can be shifted from left of center to right of center, and back, by a hydraulic piston such that the plowed ground can be directed in a desired direction.

Abstract: A combination tillage and incorporating implement having widely spaced sweeps in several rows at the forward portion of the main frame with tow trailing rows of angled spider wheels supported in pairs, for ground contour following ability and ease and flexibility of manufacture, by rockable arms extending rearwardly from the frame. Spray nozzles or the like, positioned rearwardly of the sweeps and forwardly of the spider wheels, apply material to the soil loosened and leveled by the sweeps to eliminate banding and uneven application otherwise causded by sweeps parting the soil or by material being deposited on rough ground surfaces. The rotational axes of the wheels of each row are parallel and angled with respect to the transverse direction with the rear row of wheels being angled in the opposite direction to that of the leading row to provide aggressive mixing and smooth uninterrupted soil flow across the width of the implement.