116
The Haines Interlocking
Screw System
by Lee Bartlett
A new generation of screw recess that cannot slip and requires no forward pressure to bore.
As screws bore they run away from the driver so a constant make things worse, once you spin a couple of screws and the driver
forward pressure must be applied to keep the driver and fastener becomes damaged then the system breaks down and the likelihood of
engaged. This forward pressure can be substantial and is related damaging new fasteners is greatly increased.
to friction on the fastener from the material into which it bores. If To start Mr Haines identified the weakest link in the screw design
the applied pressure is not enough then the connection as the driver/screw connection. He felt that if he could create a
between both driver and recess fails, the driver spins screw design that interlocked in
out of the recess and both components are some way, then the work to
damaged, often catastrophically. input the screw would be done
The patented Haines Interlocking Screw entirely by power tool and the
System (HISS) is the only thread of the screw. After four
driver/fastener recess years of constant design and
concept to date that redevelopment, the resulting
achieves 100% interlock screw system is an
when engaged, completely interlocking driver/recess
negating the requirement that requires no forward
for forward pressure on the pressure to insert and, in
screw and eliminating the contrast to current screw recess design,
possibility for the driver and actually draws the operator in as it bores.
screw components to slip or Removing the requirement for pressure on
‘spin’. The result is a fastener the driver meant the problem of
that requires a fraction of the screwing in awkward places was
effort to insert, as well as offering a solved and limited access was
massive increase in the potential torque no longer a problem as the
that can be applied. The HISS system driver can be ‘flexi cord’
still retains many attributes operated without the
of current screw possibility to slip. Also,
technology; a key feature driver life will be
being that the screw and dramatically extended and
driver immediately disengage screws can never be
the moment power is released. The rounded off. Finally the
HISS system essentially enables a screw interlocking nature of the
to behave as a nut but without the screw means that there is a mas-
possibility to 'round off'. In addition, the sive increase in the potential torque that
power tool and fastener do all of the work, not can be applied to the screw and unlike
the operator. any other screw it can be ratchet
The HISS was invented by Daniel Haines, a operated. From an everyday
professional builder who perspective, plumbers can remove
has spent over 20 years or insert this screw in awkward
in the trade rounding places such as under baths
off screws and their with a flexi chord; mechanics
drivers on a daily basis. can reach screws in car
Mr Haines sought to engines where limited
improve on current clearance is a problem; heavy
screw design, mainly to timber can be fastened using
eliminate the a ratchet, inserting screws
requirement for forward while standing on a ladder is
pressure on the screw. This safer as the screws holds the
problem is at its most prevalent when inserting operator in place rather than pushing
volumes of screws into awkward angles or ceilings where it is often them back; and doors can be hung or removed using this fastener,
difficult to constantly apply enough pressure to insert the fastener. To even after painting.
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