Manual release of the loaded Hook-Clamp is activated by first removing the safety / hitch pin. This is done either manually (directly by hand) or by a pull cord attached to the spring loaded safety hitch pin; i.e. remotely and safety from a distance. The safety hitch pin release cord can be activated from any direction. LiftingSafety's Automatic release Hook-Clamps provide a unique method to Automatically release a load from the rigging and can easily be adapted to suit customers requirements. Fully corrosion resistant designed specifically for subsea and offshore use with a proven pedigree and reliability. Conversion for subsea ROV operation (Work class Remote operated vehicle also referred to as WROV usually by manipulator arm though also can be converted to hotstab. Multi-Directional operation, can be used in the horizontal or vertical plain. To place a load safely and precisely or as a dropping clamp. The Hook-Clamp is now ready to be loaded. Once the safety / hitch pin is removed, the Hook-Clamp is armed and ready to be released. Either to “set down” a load or to drop a load in a controlled manor (as a drop test / dropping clamp)

Air Cylinders provide another method of release and are fitted for activation using shop air at 60 to 100 PSI. Safe working loads / Capacities range from 590kg to 69,000kg though special bespoke HookClamps are available on request, (we have designed and made units up to 250 tonne though greater capacities can be made on request) Off-shore applications as used by the oil, gas, maritime, coastal, fishing, lifeboat industries etc.... Welding, Heat Treatment, and Lubrication - All welding is with 17-4 SS wire only. All welded parts and pins are thoroughly cleaned and heat treated to H-1025 which increases the rating of the welding by 20-30% and the parts by 15%. Heat treating also results in improved mechanical, fatigue and corrosion properties across the board. Final assembly of the product includes the light application of a lubricant to each pin such as AQUA Lube, to protect the pin surfaces from pitting during extended marine use and aid in smooth mechanical function of the device. For higher capacity units, an NLGI #2.5 grease with moly added and a temperature range from 0 to 425F is applied. Inertial Load: A load resulting from accelerated releasing caused by tension on the object that is greater than gravity.

Camloc quick release fasteners : Quarter Turns

Choose the proper size Remote load release device so that it is not loaded with or releasing more than its rated load. The Auto HookClamp can also used as a drop test clamp or load dropping clamp. This is where the clamp is used to release the load "under load", for example when dropping sea defences into the sea from a boat. Effort required to release the load can be adjusted to suit your application (effort can be reduced or increased)

Once the safety hitch pin has been removed the clamp is“loaded” or “Live” and pulling the cord attached to the release lever WILL DROP / RELEASE the load. Pulling firmly on a release line connected to the end of the release lever also means that the operator can safety release the load away from the “danger area”. The release line can be activated “Directly” in any direction within the 90 degrees perpendicular and parallel to the line of load. The “Standard” release lever can also be operated from above the load as shown in the diagram below with the use of a suitable pulley; effectively giving 180 degree operation. To prevent the need to work at height, enabling the load to be disconnected from distance with-out the need to climb onto the load.

Fully certified for use in the UK, Europe and the United states of America (USA), CE Marked and supplied with an EC Declaration of conformity / Operation and user manual.

Toggle latches can come with or without catch plates, strikes or split pins as optional features for helping to secure the closed latch. They are available in a diverse selection of models and configurations, including:

The "S-Series" Hook-Clamp is affixed to a steel plate to allow more accuracy when attempting to release a load, applications such as towing and off-loading in the ocean are perfect for this Hook-Clamp The Hook-Clamp can release the load with or without load on the unit. (providing the safety hitch pin is removed). Quality Control - The manufacturer assumes the responsibility of inspecting each production unit for function, specifications, and appearance. Units not meeting the above rigid requirements are rejected. Manually, pulling a long release line. No modification of the device is required. This method is used with lower capacity models, offers the lowest cost, and has many satisfied users. A multitude of general Industrial applications; indeed for any application where the rigging gear needs to be disconnected though is is an awkward, difficult to get to position. Automatic remote release of the rigging gear prevents unavoidable accidents.

The Hook-Clamp consists of several moving parts that allow the 'jaw' to open and release a load, generally you would use a release line to attach to the lever, pull this line and the load will release. Alternative Methods of Release After use in or near sea water, a fresh water rinse of the Remote load release device is advised before it is stored. Ideal for use in the water utilities industry to automatically place pumps into sumps or wet wells. It is important to test the effort frequently after some material has been removed so as to prevent the removal of too much material. Third part whiteness test and certification available at extra cost (3rd party approval DNV, BV, Lloyds etc...)

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Used to precisely place a load in position then remotely (and therefore safely) release the load from the crane hook (rigging gear). Using this method the clamp releases the load when the weight has been transferred to the floor, (other surface for example lorry trailer building, ground etc....) The "PNU-Series" Hook-Clamp is fitted with a compressed air cylinder (Pneumatic ram) and allows for air pressure to release the load. The Air Cylinders operate at 60 to 100 PSI. Hydraulic pressure to drive a hydraulic cylinder to actuate the release lever of the Remote load release device is being used with the device ram models. These units can be activated by hydraulic hand pump, air-hydraulic foot pump, or electric pump.