Abstract: A power divider may include a signal conductor. The signal conductor may include an input, a first conductor section with a first width and a first output, and a second conductor section with a second width and a second output. The first and second widths may be different. The signal conductor may also include a septum. The septum may extend into the signal conductor from a side of the signal conductor opposite the input.

Abstract: A compaction machine such as a vibration trench roller has a supplemental receiver such as an eye located generally centrally of the machine and within a common reception zone of another receiver on the machine. The eye can receive a signal that is blocked from impinging upon the machine's other receiver(s), preventing the machine from shutting down when it passes beneath an obstruction and negating the need for the operator to reposition himself or herself to reestablish communications with the machine. The supplemental receiver may be positioned so as to maximize the operating range of the controller while reducing or avoiding false signals that otherwise could occur due to signal reflection. This positioning may include providing shielding around the supplemental receiver that creates a geometric umbrella of reception capability that forms a protection zone beneath it. Signals transmitted from within the protection zone cannot impinge on the supplemental receiver.

Abstract: A power divider may include a signal conductor. The signal conductor may include an input, a first conductor section with a first width and a first output, and a second conductor section with a second width and a second output. The first and second widths may be different. The signal conductor may also include a septum. The septum may extend into the signal conductor from a side of the signal conductor opposite the input.

Abstract: A compaction machine such as a vibration trench roller has a supplemental receiver such as an eye located generally centrally of the machine and within a common reception zone of another receiver on the machine. The eye can receive a signal that is blocked from impinging upon the machine's other receiver(s), preventing the machine from shutting down when it passes beneath an obstruction and negating the need for the operator to reposition himself or herself to reestablish communications with the machine. The supplemental receiver may be positioned so as to maximize the operating range of the controller while reducing or avoiding false signals that otherwise could occur due to signal reflection. This positioning may include providing shielding around the supplemental receiver that creates a geometric umbrella of reception capability that forms a protection zone beneath it. Signals transmitted from within the protection zone cannot impinge on the supplemental receiver.

Abstract: A vibratory ride-on roller machine includes a chassis supported on front and rear vibrating drum assemblies that compact the surface on which the machine travels. The machine is controlled via a control assembly including a control lever. A number of control elements for controlling operations of the roller machine are located on the control lever, the operations including one or more of turning the exciter assembly on and off, switching between exciter assemblies, controlling the level of vibration of the exciter assemblies, controlling a spray assembly, and sounding a horn element. The control elements are advantageously positioned to enable operator actuation regardless of the operator's orientation on the roller and regardless of the position of the control lever within its operating stroke.

Abstract: A vibratory ride-on roller machine includes a chassis supported on front and rear vibrating drum assemblies that compact the surface on which the machine travels. The machine is controlled via a control assembly including a control lever. A number of control elements for controlling operations of the roller machine are located on the control lever, the operations including one or more of turning the exciter assembly on and off, switching between exciter assemblies, controlling the level of vibration of the exciter assemblies, controlling a spray assembly, and sounding a horn element. The control elements are advantageously positioned to enable operator actuation regardless of the operator's orientation on the roller and regardless of the position of the control lever within its operating stroke.

Abstract: A dosing apparatus includes a feed device for a liquid or pasty medium, which supplies the medium at a given preliminary pressure. A pressure control valve communicates with the feed device, a dosing pump is fluidically connected to the pressure control valve, a driving motor that drives the dosing pump, a discharge valve discharges the medium as a volume flow modifiable over time. A control and regulation device feeds a control signal to the pressure control valve in accordance with a predefined setpoint volume flow value. A comparator of the control and regulation device compares the input and output pressure values, and a control unit modifies the control signal fed to the pressure control valve in order to drive the difference between the input and output pressure values to a given value.

Abstract: A dosing apparatus includes a feed device for a liquid or pasty medium, which supplies the medium at a given preliminary pressure. A pressure control valve communicates with the feed device, a dosing pump, particularly a gear pump, is fluidically connected to the pressure control valve, a driving motor that drives the dosing pump, a discharge valve which communicates with the dosing pump and via which the medium is discharged as a volume flow modifiable over time. A control and regulation device feeds a control signal to the pressure control valve in accordance with a predefined setpoint volume flow value. A first pressure sensor detects the input pressure of the medium upstream from the dosing pump, a second pressure sensor detects the output pressure of the medium downstream from the dosing pump.

Abstract: A lightweight, easy to assemble, and compact exciter assembly for a compaction device such as a drum assembly of a vibratory trench roller or the like includes a fixed weight and one or more free swinging weights mounted on an exciter shaft, without using any mounting hardware, so as to hold the free swinging weights axially in position while permitting them to swing between first and second angular positions on the exciter shaft. Preferably, the fixed weight is mounted on a central portion of the exciter shaft, and two free swinging weights are mounted adjacent the ends of the fixed weight so as to be restrained from substantial sliding movement along the exciter shaft solely by the fixed weight and other operative components of the exciter assembly such as bearings and/or gears or other torque transfer elements.

Abstract: A method of assembling an exciter assembly for a compaction machine includes mounting a torque transfer element and a bearing on an exciter shaft. A fixed eccentric weight is mounted on the exciter shaft. First and second free swinging eccentric weights are mounted on the exciter shaft adjacent respective ends of the fixed eccentric weight so as to be rotatable a limited amount relative to the exciter shaft. The first and second free swinging eccentric weights are restrained from substantial axial movement along the exciter shaft solely by being sandwiched the first and second free swinging eccentric weights between the respective ends of the fixed eccentric weight and operative components of the exciter assembly. All of the mounting steps are performed without the use of any mounting hardware.

Abstract: A fault detecting circuit for use with an electromagnetic acoustic transducer having an electrostatic shield and a wear surface for determining when the wear surface for contacting test surfaces has developed holes.