Abstract: A safety release device particularly useful for tethering horses comprises a cylindrical housing, a central shaft therein having on one end a spring retainer/trigger and on the other end a capture washer held by a stop or shoulder on the shaft, a spring between the retainer and the washer, two opposed spring loaded capture dogs engaging the capture washer and preventing it and the shaft from being pulled from the housing until released and fastening members, one attached to the end of the shaft and another attached to the housing to permit lines to be attached thereto. The operation of the device is such that when a sufficient pull is exerted on the shaft, the spring compresses allowing the retainer/trigger to move toward the capture washer against the action of the spring and in so doing to force the dogs apart releasing the washer and thus the shaft.

Abstract: In the mooring of ships, boats and barges to a dock or oil well platform it is necessary to have a line run from the ship or boat or barge to the dock or platform. The line running from the dock or platform to the ship or boat or barge is under tension. This invention is directed to a RELEASEABLE HOOK which, automatically, trips and releases the line when the tension on the line exceeds a predetermined tension. The ship or boat or barge at that time is free to move. The increase in the tension in the line maybe be brought about by rough water or by a wind or other causes. This RELEASEABLE HOOK is a design to trip and release the line without an operator. The tension in the line, when it exceeds a predetermined tension or pressure on the hook, will cause the hook to automatically trip.

Abstract: A hydro-pneumatic device secures and releases a mooring or towing hawser to a vessel. A carriage reciprocates on a frame on the vessel and moves a bollard between one position securing a hawser to the towing or moored vessel and another position releasing the hawser. Movement of the carriage on the frame is accompanied by movement of a piston in a cylinder on the frame, the piston being connected to the carriage by a chain trained around a sprocket on the piston rod. A combination of liquid and gaseous fluid systems with various manual and automatic controls is connected to the cylinder and normally allows the piston to oscillate about a chosen average position. The fluid system by manual or automatic control lets the carriage move to a predetermined, extreme position on the frame. In such position the carriage actuates the bollard to release position, freeing the line. The carriage can be locked to the frame in the extreme position.