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THE NEW GENERATION

Unlike conventional clutches the Constrictor® system does not crush the rope between two metal surfaces. Instead, the loaded rope is held securely in a textile sleeve, itself attached to a base unit. The rope runs freely through the sleeve in one direction, but is gripped instantly when running out in the opposite direction. This patented "constrictor effect", provides greater holding power as the load increases.

FEATURES

Stronger and lighter

Twice the holding power and a third of the weight of conventional rope clutches.

Release Under Load

The line can easily be released under load without the use of a winch simply by pulling the lanyard.

Remote Release System:

The Dyneema® lanyard can be extended for remote release; for example, to lock a halyard or reefing line to reduce spar compression and minimise rope creep.

Structural integration

The Constrictor® is also available in a version suitable for structurally integrated installations. Instead of the notched alloy base unit, the sleeve is supplied with an alloy mounting collar that can be built into a suitably reinforced bulkhead or a customised base fitting.

Non destructive

The textile sleeve closes like a constrictor on the line. The extraordinary grip is the result of fibre-to-fibre contact that is far less aggressive than a traditional metal cam, and much more effective.

See the full Constrictor® range

Constrictor


ANATOMY

Technora® aramid textile sleeve

  • Braid Orientation: Cousin Trestec® experience and expertise in rope manufacture guided the development of the critical braiding angle to maximise grip and minimise slippage.
  • Fibre Assembly: Extensive knowledge of fibres combined with laboratory and field testing has resulted in an optimum fibre balance and density for unmatched strength.
  • Treatment: A specialised surface treatment plays a critical role in extending the product life, boosting grip and reducing abrasion in stress areas.

Bi-conical Titanium ring:

The patented textile sleeve element is locked in place between a titanium ring and the base unit. The unique conical geometry allows easy insertion of the rope, and ensures that the sleeve is perfectly integrated with the alloy base unit in supporting the applied load.

Controlled holding power:

Pulling on the Dyneema® lanyard retracts the sleeve, relaxing the grip on the rope and allowing it to run freely in either direction. The lanyard can be fixed in the V-notch of the base unit to hold the Constrictor® in the open position. Releasing the lanyard allows the sleeve to be drawn to its extended position by a shock cord, constricting the rope in a firm, secure grip.


MODELS AND DIMENSIONS


Constrictor Diagram

Product No
(With Alloy Base Unit)
Clutch Size Breaking Load (” rope) Weight C Width B Length
Kg lb g oz mm in mm in
CT306P001 Constrictor 6 (1/4”) 460(Ø5) / 750(Ø6) 1010(Ø3/16”) / 1670(Ø1/4”) 150 5.3 25 1” 115 4 9/16”
CT308P001 Constrictor 8 (5/16”) 710(Ø6) / 1170 (Ø8) 1560 (Ø1/4") / 2570(Ø5/16”) 155 5.4 25 1” 115 4 9/16”
CT310P001 Constrictor 10 (3/8”) 1220(Ø8) / 2240(Ø10) 2680(Ø5/16") /4920(Ø3/8”) 160 4.6 25 1” 115 4 9/16”
CT312P001 Constrictor 12 (1/2”) 1530(Ø10) / 2850(Ø12) 3360(Ø3/8") / 6270(Ø1/2”) 330 11.6 36 1 3/8” 126 5”
CT314P001 Constrictor 14 (9/16”) 1830(Ø12) / 3770 (Ø14) 4020(Ø1/2”) / 8290 (Ø9/16") 340 12.0 36 1 3/8” 126 5”


Product No
(with Alloy Base Unit)
Clutch Size A Height LOA E min E max Ø Screw
mm in mm in mm in mm in mm in
CT306P001 Constrictor 6 (1/4”) 45 4 1/2” 588 23 5/32” 70 2 3/4” 90 3 1/2” 8 5/16”
CT308P001 Constrictor 8 (5/16”) 45 4 1/2” 638 25 1/8” 70 2 3/4” 90 3 1/2” 8 5/16”
CT310P001 Constrictor 10 (3/8”) 45 4 1/2” 638 25 1/8” 70 2 3/4” 90 3 1/2” 8 5/16”
CT312P001 Constrictor 12 (1/2”) 58 5” 787 31” 70 2 3/4” 90 3 1/2” 12 1/2”
CT314P001 Constrictor 14 (9/16”) 58 5” 787 31” 70 2 3/4” 90 3 1/2” 12 1/2”

Constrictor Diagram

Product No
(For Structural Integration)
Clutch Size Breaking Load (” rope) Weight I Width L Length
Kg lb g oz mm in mm in
CT306P001-EN Constrictor 6 (1/4”) 460(Ø5) / 750(”6) 1010(”3/16”) / 1670(Ø1/4”) 56 2.0 20 25/32” 25 1”
CT308P001-EN Constrictor 8 (5/16”) 910(Ø6) / 1170 (Ø8) 1560 (Ø1/4") / 2570(Ø5/16”) 62 2.2 20 25/32” 25 1”
CT310P001-EN Constrictor 10 (3/8”) 1220(Ø8) / 2240(Ø10) 2680(Ø5/16") /4920(Ø3/8”) 116 4.1 30 1 3/16” 30 1 3/16”
CT312P001-EN Constrictor 12 (1/2”) 1530(Ø10) / 2850(Ø12) 3360(Ø3/8") / 6270(Ø1/2”) 156 5.5 33 1 5/16” 34 1 11/32”
CT314P001-EN Constrictor 14 (9/16”) 1830(Ø12) / 3770 (Ø14) 4020(Ø1/2”) / 8290 (Ø9/16") 192 6.8 36 1 13/32” 36 1 13/32”


<
Product No
(For Structural Integration)
Clutch Size H Height LOA F Ø Screw
mm in mm in mm in mm
CT306P001-EN Constrictor 6 (1/4”) 25 1” 910 35 13/16” 550 21 21/32" M4
CT308P001-EN Constrictor 8 (5/16”) 25 1” 960 37 25/32” 600 23 5/8” M4
CT310P001-EN Constrictor 10 (3/8”) 40 1 9/16” 960 37 25/32” 600 23 5/8” M4
CT312P001-EN Constrictor 12 (1/2”) 44 1 9/16” 1110 43 11/16” 750 29 17/32” M4
CT314P001-EN Constrictor 14 (9/16”) 47 1 27/32” 1110 43 11/16” 750 29 17/32” M4


USED BY THE BEST

You will already find the Constrictor® solution in use on the top Maxi, Mini, Multi, IMOCA and AC72 teams. COUSIN Trestec have developed a trouble-free and ergonomic product that will please anyone looking for the New Generation in rope holding technology.

COUSIN Trestec

The manufacturer of the Constrictor® COUSIN Trestec is renowned for technical and professional competence in lines, ropes and fibre cables. COUSIN Trestec brings together the strength and knowledge of a industrial group for the service of its customers. The secret of their success? Unrivalled know-how, coupled with a wide and diversified range of high spec products supplied and supported through a worldwide network of agents and distributors.

Pittman Innovation Award

INTEGRATED SOLUTIONS

Constrictor® gives you the opportunity to completely redefine your deck plan. It offers high performance rope holding with an unrivalled level of integrated and aesthetically pleasing solutions � free from the clutter, bulk and obstruction of conventional rope clutches. Why have your clutches visible when they can be hidden under a low profile hood or partition!

Constrictor Integration

CUSTOM SOLUTIONS

Custom Constrictor® solutions are available with holding power up to the break load of the rope, and �insert� designs are possible for direct integration into hull or spars via lamination or other methods. Contact us to discuss your needs.

Custom Constrictor