Abstract: A lockbox has a body housing that includes a back portion and a front portion which together enclose an interior space for storing contents. A shackle slidingly engages with the body housing so that the shackle can slide between a lowered locked position and a raised unlocked position. A lockbox security lock mechanism is provided on an exterior surface of the body housing for locking the front portion in a closed position for preventing access into the interior space of the body housing. A shackle security lock mechanism is positioned within the interior space of the body housing for engaging the shackle for preventing the shackle from moving to the raised unlocked position until the shackle security lock mechanism is unlocked.

Abstract: There is disclosed a suction dredge system and method. The suction dredge system may include a suction dredge head, an exhaust hose connected to the suction dredge head, a high pressure fluid source connected to the suction dredge head for providing a flow of high pressure fluid to the suction dredge head to induce a vacuum in the suction dredge head, and the suction dredge head including an automatic blockage clearing device. The method of suction dredging may include providing a flow of high pressure fluid within a suction dredge head in a first direction for inducing a vacuum at an intake of the suction dredge head, and changing the direction of the flow of the high pressure fluid within the suction dredge head to a second direction for clearing a blockage at the intake of the suction dredge head.

Abstract: In practical application, it often happens that a large number of motion sensors and control mechanisms is required in order to carry out controlled movements, e.g., of welding tongs. The object of the present invention is to provide a solution for controlling the movement of a pair of welding tongs in the most efficient and economical manner possible with a minimum of electrical and mechanical expenditure. This object is attained by the present invention by using mechanical displacement-limiting means that limit a swiveling motion if it should occur. The advantage is the robust design and elimination of electronics and sensor systems, which are susceptible to interference.