An autonomous hydraulic expansion and contraction apparatus comprises a fixing unit, a cylinder unit, a support unit, a piston unit, a valve unit and oil supply parts. By controlling the expansion and contraction length of the support part by a simple manipulation of the valve part by moving the lever, the autonomous hydraulic expansion and contraction apparatus can be easily expanded and contracted to the combined length of the expansion and contraction equipment, and additionally, the convenience of use can be enhanced.

An autonomous hydraulic expansion and contraction apparatus comprises a fixing unit, a cylinder unit, a support unit, a piston unit, a valve unit and oil supply parts. By controlling the expansion and contraction length of the support part by a simple manipulation of the valve part by moving the lever, the autonomous hydraulic expansion and contraction apparatus can be easily expanded and contracted to the combined length of the expansion and contraction equipment, and additionally, the convenience of use can be enhanced.

The present invention relates to a pusher mechanism comprising a column (1) capable of being subjected to a compressive force or a pulling force when in use and having a height (H) defining a first direction, a width (l) and a thickness (E), the thickness (E) being constant, the height (H) being variable, when in use, between a quiescent value (H.sub.0) and a maximum value (H.sub.M) and the width (l) being variable, when in use, between a quiescent value (l.sub.0) and a minimum value (l.sub.in), the column comprising two vertical members (2, 3) facing each other and extending along the height (H) and the thickness (E), and reversible means (6) supported by the vertical members and designed to transform a compressive force exerted on the vertical members along the width (l) of the column into a movement along the first direction of the column, the width (l) of which subsequently decreases (l<l.sub.0) and the height (H) of which subsequently increases (H>H.sub.0), and vice versa.

The present invention relates to a pusher mechanism comprising a column (1) capable of being subjected to a compressive force or a pulling force when in use and having a height (H) defining a first direction, a width (l) and a thickness (E), the thickness (E) being constant, the height (H) being variable, when in use, between a quiescent value (H.sub.0) and a maximum value (H.sub.M) and the width (l) being variable, when in use, between a quiescent value (l.sub.0) and a minimum value (l.sub.in), the column comprising two vertical members (2, 3) facing each other and extending along the height (H) and the thickness (E), and reversible means (6) supported by the vertical members and designed to transform a compressive force exerted on the vertical members along the width (l) of the column into a movement along the first direction of the column, the width (l) of which subsequently decreases (l<l.sub.0) and the height (H) of which subsequently increases (H>H.sub.0), and vice versa.

A clamping device for a cable closure system. The clamping device (1) includes a supporting base (2), a pulley (3), operatively associable with a closure cable, and a handle (4), connected integrally to the pulley (3) and manually activatable. The clamping device (1) includes first and second retaining means (5,6) operatively engageable with a toothed surface (331) of the pulley (3) and control means (7), separate from said handle (4). The retaining means (5,6) and the control means (7) are operatively associated with one another so as to be able to obtain a complete release or a controlled release of the clamping tension of the closure cable.

A clamping device for a cable closure system. The clamping device (1) includes a supporting base (2), a pulley (3), operatively associable with a closure cable, and a handle (4), connected integrally to the pulley (3) and manually activatable. The clamping device (1) includes first and second retaining means (5,6) operatively engageable with a toothed surface (331) of the pulley (3) and control means (7), separate from said handle (4). The retaining means (5,6) and the control means (7) are operatively associated with one another so as to be able to obtain a complete release or a controlled release of the clamping tension of the closure cable.

An anchor point for a lever binder is disclosed herein. The anchor point includes a collar. The anchor point also includes a cap including a base and at least one arm. The collar and the cap cooperate to form an aperture for receiving a handle of a lever binder.

An anchor point for a lever binder is disclosed herein. The anchor point includes a collar. The anchor point also includes a cap including a base and at least one arm. The collar and the cap cooperate to form an aperture for receiving a handle of a lever binder.

A barrier cable coupler for coupling two lengths of barrier cable comprises a coupler body including a threaded inner surface, a first end, and a second end; a fixed retaining collar having an outer surface and being retained to the first end of the coupler body, the fixed retaining collar including a tapered inner surface; one or more fixed end wedges positioned within the tapered inner surface of the fixed retaining collar; a tensioning retaining collar having an outer surface, the tensioning retaining collar positioned at least partially within the second end of the coupler body and including a tapered inner surface; one or more tensioning end wedges positioned within the tapered inner surface of the tensioning retaining collar; and a tensioning nut including a threaded outer surface engaging the threaded inner surface of the second end of the coupler body and retaining the tensioning retaining collar therein.

A barrier cable coupler for coupling two lengths of barrier cable comprises a coupler body including a threaded inner surface, a first end, and a second end; a fixed retaining collar having an outer surface and being retained to the first end of the coupler body, the fixed retaining collar including a tapered inner surface; one or more fixed end wedges positioned within the tapered inner surface of the fixed retaining collar; a tensioning retaining collar having an outer surface, the tensioning retaining collar positioned at least partially within the second end of the coupler body and including a tapered inner surface; one or more tensioning end wedges positioned within the tapered inner surface of the tensioning retaining collar; and a tensioning nut including a threaded outer surface engaging the threaded inner surface of the second end of the coupler body and retaining the tensioning retaining collar therein.