Knights Media & Public Relations

London, 9 June 2021: William Hackett, world-leaders and pioneers of offshore lifting hoists and chains, announce today a major step forward for onshore operators with the launch of the WH C4 QP, incorporating the company's patented quad pawl (QP) mechanism - positioned as the safest and most efficient chain hoist in the world.

Designed for critical lifting applications that are onshore where resilience to failure and fine tolerance adjustment are essential, the WH C4 range of chain hoists are the only chain hoists to incorporate a QP mechanism for onshore use and endurance tested to twice the required industry norm.

Safety: Enhanced resilience to failure

The patented QP of the WH C4 chain hoist has four independent pawls, each which provide a 4:1 factor of safety and which will operate safely should any individual pawls or pawl springs fail.

Proven: Tested for durability

Proof tested to more than 3,000 cycles; twice the required standard of BS EN 13157.

Endurance: Improved performance to weight ratio

WH C4 is manufactured with strict quality of design and materials to make it weigh less. Its reduced unit mass reduces the risk of injury to the user during handling, transfer and rigging.

"Innovation based on a detailed understanding of lifting applications is at the heart of what we do, and this latest addition of the QP in the WH C4 range of hoists increases the level of operational safety and performance levels provided by chain blocks," said Ben Burgess, director at William Hackett.

"The QP offset load bearing mechanism is the best in the market, and it offers enhanced operating performance compared to first-generation twin-pawl products," said Burgess. "With double the number of offset pawls in a chain hoist, from two to four, the load is spread securely against the ratchet gear to provide increased redundancy and resilience for the user."

Safe and continual performance of lifting equipment crucially depends on minimising risk through improved resilience to failure. Lift operations are often fast-moving, challenging and hazardous environments. Improvements in efficiency, ease of use, and safety can yield large returns for operators across any industry - from construction, engineering and shipping, through to energy and transport.

The QP works by allowing all four pawls to engage with the ratchet gear in an offset configuration that allows for finer adjustment, and tensioning capability, while maintaining pawl and ratchet gear engagement.

The pawl springs are enclosed in the product's brake chamber to minimise contamination, and the patented pawl design ensures that in the unlikely event of both pawl springs failing, the quad pawls maintain full function with the ratchet gear, making the hoist operation much safer to use. The patented QP mechanism synchronises to minimise the time and distance travelled to the next point of engagement further improving hoist times and providing smooth lift operations.

"It overcomes jamming and unintended malfunctions that can be experienced when using other simpler first-generation products," said Burgess. "This helps to minimise project downtime or costly delays to work scopes, providing reassurance and peace of mind for operators and contractors."

The QP innovation is the result of William Hackett's long-term investment strategy to innovate and develop lifting solutions that help to mitigate potential areas of risks and failure. It is preparing to launch a subsea version of the WH C4 QP that comes with high corrosion-protection for offshore operations.

Burgess said: "We continue to work hard to create a technically-superior chain hoist that save operators money, and consistently performs on safety for those valuable payloads. While we recognise there are economic challenges for industry, and increased operating pressures as a result of a global health pandemic, we believe the approach to innovation with the WH C4 QP will better support industry at this critical time. Safe just became safer by design."


Notes to editors


1. WH C4 QP product image (available on request).

2. Video animation of the QP technology

About William Hackett

William Hackett was founded in England in 1892 and has been manufacturing chain-related products, celebrating its 125th Anniversary in 2017. In 1989 the company established a lifting division in Northumberland, UK, and today is a global supplier of lifting equipment and chain products into lifting, lashing, marine, mining, energy and agricultural markets around the world.

William Hackett is renowned for its ethos of integrity and dependability, which is built on its world-class service in design, assembly, certification, compliance and distribution capabilities.

Discover more at Follow us on LinkedIn @William Hackett.

For media enquiries contact

Jason Knights, director, Knights Media & Public Relations

M +44 (0)78 51 866 007



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