Throw lock assemblies, throw bolt assemblies, and methods for assembling and using same

A throw lock assembly to lock a gateway, comprising:

• a throw bolt, a bolt holder and a bolt keeper, and
• the throw bolt comprising a cutting barrier and a bolt casing to house the cutting barrier, the cutting barrier being harder than the bolt casing, and the bolt casing being more corrosion-resistant than the cutting barrier;
• configured such that when arranged as in use,
• the throw bolt will be moveably coupled to the bolt holder, and is configured to be moved between a locking position and a non-locking position, in which
• in the locking position, a throw portion of the throw bolt will project from the bolt holder and extend into the bolt keeper, and
• in the non-locking position, the throw bolt will be retracted from the bolt keeper;
• and in which
• the throw portion of the throw bolt will include at least a portion of the cutting barrier, and an entirety of said portion of the cutting barrier in the throw portion will be shielded;
• in which
• the throw bolt comprises a spacer member housed within the bolt casing, arranged between the cutting barrier and a side wall of the bolt casing;
• in which the spacer member comprises material having lower hardness than the cutting barrier;
• and the throw lock assembly comprising:
• a drive mechanism to move the throw bolt in use between the non-locking and locking positions, responsive to an engagement member of the drive mechanism being inserted into a recess provided in the throw bolt and applying a force to the throw bolt;
• and in which
• the spacer member is configured such that the recess is formed through the side wall of the bolt casing and into the spacer member, without passing through the spacer member.