Abstract: A headset includes: a first ear cup comprising one or more first output transducers for provision of first sound based on a first audio input signal; and a second ear cup comprising one or more second output transducers for provision of second sound based on a second audio input signal; wherein the first ear cup comprises a first communication interface configured to communicatively connect to a first external device; wherein the second ear cup comprises a second communication interface having a second device connector configured to communicatively connect to a second external device; wherein the first ear cup and the second ear cup are interconnected by one or more interconnection cables; wherein the headset comprises one or more electronic circuits configured to enable the first external device to exchange non-audio data with the second external device via the one or more interconnection cables.

Abstract: A communication device for a hearing protection system comprising one or more hearing protection devices. The communication device comprises a processing unit, a memory, and an interface. The interface comprises a first hearing protection device interface comprising a first connector for connection of a hearing protection device. The interface comprises a second hearing protection device interface comprising a second connector for connection of a hearing protection device. The first connector and the second connector are of the same connector type.

Abstract: A hydraulic system for a working machine, the hydraulic system includes: a hydraulic fluid reservoir; a boom actuator having an ascending chamber and a descending chamber; a first pump; a first directional control valve comprising a first ascending state configured for moving the boom in the ascending direction, a descending state configured for moving the boom actuator in the descending direction, and a first neutral state; a second pump; a second directional control valve comprising a second ascending state configured for moving the boom actuator in the ascending direction, and a second neutral state; wherein the second directional control valve further comprises a float state configured to connect at least one of the ascending and descending chambers to the hydraulic reservoir for permitting the boom to move freely in the descending and/or descending directions.

Abstract: A hydraulic system for a working machine, the hydraulic system includes: a hydraulic fluid reservoir; a boom actuator having an ascending chamber and a descending chamber; a first pump; a first directional control valve comprising a first ascending state configured for moving the boom in the ascending direction, a descending state configured for moving the boom actuator in the descending direction, and a first neutral state; a second pump; a second directional control valve comprising a second ascending state configured for moving the boom actuator in the ascending direction, and a second neutral state; wherein the second directional control valve further comprises a float state configured to connect at least one of the ascending and descending chambers to the hydraulic reservoir for permitting the boom to move freely in the descending and/or descending directions.

Abstract: A string trimmer includes a handle portion that includes an arm cuff for securing a portion of an arm of an operator to the handle portion, and a grip portion enabling the operator to hold the grip portion using a hand of the same arm during operation of the string trimmer. The string trimmer also includes a first shaft coupled to the handle portion, a second shaft at least partially slidable into the first shaft, and a head portion coupled to the second shaft. The head portion includes a hub comprising a cutting tool and a motor configured to rotate the hub.

Abstract: An apparatus and method are disclosed for mixing materials using a portable mixing apparatus. The portable mixing apparatus includes a base, a support stand coupled to and extending upward from the base, and an opening disposed to one side of the base and configured to receive a container. The mixing apparatus may also include a timer for terminating power to the handheld power tool upon reaching a predefined time value. The method includes providing a base, providing a support stand coupled to and extending upward from the base, and providing an opening disposed to one side of the base for receiving a container. A mixing paddle is also included with a central portion having a first end having a bend in a first direction, a second end having a second bend in an opposing direction, and a flexible portion coupled to a bottom surface formed by the central portion.