Abstract: A robotic lawn mower includes a first wheel driven by a first electric wheel motor, a second wheel driven by a second electric wheel motor, a cutting implement driven by an electric cutting implement motor, a power system for powering the electric wheel motors and the electric cutting implement motor, and a controller configured to control operation of the electric wheel motors and the electric cutting implement motor to autonomously mow a yard. The power system includes multiple removable rechargeable battery modules and multiple receptacles, each receptacle configured to receive one of the battery modules.

Abstract: A tool head for a hand-guided implement possesses two rotatably mounted tools, wherein a first tool is drivable via a first linkage and a second tool is drivable via a second linkage. The tools are drivable so that they rotate back and forth in opposite directions about a common rotational axis. The first linkage possesses a first drive member coupled to a first coupling member pivotably about a first link axis. The first coupling member is coupled to the first tool pivotably about a second link axis. The second linkage possesses a second drive member coupled to a second coupling member pivotably about a third link axis. The second coupling member is coupled to the second tool pivotably about a fourth link axis. The rotational axis of the tools and the coupling drive axis span a center plane, which runs between the second link axis and the fourth link axis.

Abstract: A header for a combine harvester comprising a drive arm assembly, bearing assembly and knife head assembly is disclosed. The drive arm assembly includes a drive arm with a proximal end operatively connected to a drive mechanism for reciprocating motion therewith and a distal end opposite the proximal end. The bearing assembly is attachable to the distal end of the drive arm and includes an eccentric hub. The knife head assembly includes a knife head and a housing mounted to the knife head. The housing houses the bearing assembly.

Abstract: A reciprocating, brush cutting attachment for a vehicle such as a riding lawn mower. The attachment is in the form of a sickle head having a bottom support plate that acts as a frame for the sickle head. Two top blades reciprocate back and forth on top of the support plate, one on each side. The bottom support plate and the two top blades all include front blade edges having a plurality of teeth. As the top blades move back and forth, vegetation between the teeth is cut. The prime advantage of the sickle head of the present invention is the reduction of vibrations achieved by continuously driving the colinear top blades in opposite directions with respect to each other.

Abstract: The cutting device proposed has cutting cells (3), located side by side, which collect the items to be cut. Each cell (3) contains a stationary element, which is designed to act as a support for the items to be cut and has a stop edge for the items, and a mobile element (4) which is designed to press the items together in the cell (3). During the cutting process, the mobile element is driven so that it remains substantially parallel to the support edge, and its motion during cutting is tangential to the items being cut. This tangential cutting action enables very considerable reductions to be made in energy consumption and noise generation. The cutting device is suitable for use in grass mowers, agricultural reaping and mowing machines and hedge clippers.

Abstract: Disclosed is a mowing apparatus, which includes a pair of first and second cutting members slidably superposed with each other, each of the members including a plurality of aligned cutting teeth; mechanism for moving the first cutting member relative to the second cutting member reciprocably within a predetermined range in the direction of the aligned cutting teeth at a substantially uniform speed; and a drive source for driving the moving mechanism. The moving mechanism includes a solenoid actuator having first and second coils and a plunger provided reciprocatingly movably between the first and second coils. The plunger is connected to the first cutting member.

Abstract: Disclosed herein is a mowing apparatus including: a motive power source for supplying rotating motion; a mowing head; a pair of first and second cutting disks slidably superposed with each other, each of the disks including a plurality of peripheral cutting teeth and the first and second cutting disks being oscillatably mounted to the mowing head; a mechanism for reciprocatively oscillating the first and second cutting disks oppositely with each other within a predetermined oscillating range, the reciprocatively oscillating mechanism being accommodated in the mowing head and adapted to be driven by the rotational motion supplied form the motive power source; and a mechanism for changing the mounting position of the first and second cutting disks about the mowing head in the circumferential directions of the cutting disks so that a portion to be used for mowing in the first and second cutting disks can be changed without removing the first and second cutting disks from the apparatus, the mounting position chan

Abstract: A lawnmower comprising a mower deck carried by four wheels positioned in laterally opposed pairs, with the forward wheels being adjustable for selecting mowing height. A pair of longitudinal blades are carried at the forward edge of the deck and have respective arrays of blade teeth projecting forwardly of the deck. The lower blade is affixed to the deck and the upper blade is coupled by a bell crank and a pitman drive to the output shaft of an engine for reciprocating the upper blade over the lower blade and thereby scissoring the respective blade teeth arrays. A guard shell is carried by the mower deck enclosing the mower blades and has vertical slots in the forward shell wall for receiving and combing grass to positions among the mower blade teeth. A blower is coupled to the shell for assisting such combing action and for removing clippings from the shell enclosure. The shell slots are dimensioned to prevent entry of rocks, tree trunks and human limbs.

Abstract: An oscillating knife cutting apparatus preferably for use on a row crop harvesting unit of a forage harvester to sever crop material from its standing position in a field as it is delivered into the harvester. The apparatus comprises a main support with a main pair of knives fixed thereon, a bearing fixed to said main support, a shaft rotatably mounted in said bearing, and a secondary support with a knife fixed thereto. The secondary support is mounted on said shaft for oscillatory movement therewith relative to said main support. The secondary knife is disposed between the pair of main knives and is used to sever material disposed between the secondary knife and each of the main knives. The secondary knife is adjustably mounted for movement toward the plane defined by the main knives by adjustment of a member threadably mounted longitudinally of the shaft whereby rotation of the threaded member frictionally engages a clamp mounting the secondary support on the shaft.

Abstract: A multirow forage harvester header for cutting and conveying a row crop from a standing position in the field into a crop receiving throat of the harvester for processing. The header is provided with an improved drive means for actuating a pair of crop cutters respectively disposed adjacent the crop entries of two crop receiving and conveying passageways of the header. The drive means includes a reciprocatable rod connected between one of the cutters and a remotely located input drive and a second reciprocatable rod connected between the two cutters. The two cutters are synchronously driven by the input drive through the first and second reciprocating rods.

Abstract: The invention relates to an improvement in a reciprocating mower of the type wherein pivotal reciprocation of the cutting blades is produced by impact blows received from a rotary impactor. In accordance with this invention, two actuating levers are employed to transmit impact forces from a rotary impactor to the movable blades of the mower; one such lever moves the blades in one direction and the other lever effects the return movement of the movable blades. The rotary impactor successively contacts the two levers so that the resulting movements of the cutting blade is a movement in one direction followed by a dwell period, then a movement in the opposite direction followed by a dwell period. A fan, driven by the same prime mover as utilized to drive the rotary impactor, generates air currents which pick up and straighten the grass or other vegetation to be cut by the reciprocating blades and directs the cut vegetation through the plenum chamber of the fan and outwardly through a discharge chute.

Abstract: A lawn mower of the sickle-bar type having an elongated straight double-edged blade mounted at either end by a planetary mount producing in the horizontal plane a generally laterally reciprocating motion combined with an orbital motion creating cutting forces in both directions with the double-edged blade. The basic support wheels, handle and blade mounting and driving system are so mounted to allow one of the cutting sides or edges of the blade to be used for usual lawn mowing operation, which side is located well within and under and centrally to the basic mower structure, and the other, opposite cutting side to be used for trimming close to walls, trees, etc., which side is located at and moves past the end of the basic mower structure. The handle is reversible from one side to the other to allow the operator to move to and push from the appropriate side, depending on whether mowing or trimming operation is desired.

Abstract: A shearing device is disclosed for severing trees and the like. The device is vehicle mounted, preferably on the front of a tractor, so that forward movement of the tractor causes shearing of a tree in contact with the device. The device includes a frame member with a pair of forwardly extending spaced arms one of which has a pivot member mounted thereon, with the pivot member carrying a severing element that can be moved in an arc toward and away from the other arm of the frame member. A tree brought into contact with the severing element will be severed as the severing element is caused to move toward the other arm of the frame member due to continued forward movement of the vehicle. After a tree has been severed, the pivot member is preferably biased to automatically return to normal position near the end of the arms of the frame member with the severing element at least partially spanning the space between the arms.

Abstract: A cutting machine including a mobile housing having mounted thereon a cutting blade driven by a prime mover in the form of a motor or the like which also drives a source of fluid flow disposed in communicating relation with the cutting area defined by the operative positioning of the cutting blade such that the debris from the cut grass is forced into a collection container or the like which is disposable and removably mounted from the housing. The cutting blade is interconnected to a drive shaft by a cam element engaging the cutting blade in such a manner as to move it in an eccentric fashion relative to the longitudinal axis of the drive shaft but in a non-rotational direction relative thereto.

Abstract: An upright cordless grass trimmer incorporated incoporates fixed multi-toothed bottom blade and plural sets of top blades which oscillate over the bottom blade to achieve cutting. The sets of top blades are driven by a motor through a gear and cam mechanism and are synchronized so that one top blade set cuts at a different time in the cycle from the other set to achieve a counterbalancing and load leveling effect. A clutch mechanism absorbs abrupt blade stoppage and shock situations and a rechargeable battery pack is releasably received by an elevated cavity in a shroud which mounts over the motor and drive mechanism. An upright handle and electrical control means are attached to the trimmer which allows the operator to operate the trimmer in an upright position.