This is another work in progress.

Background: often travel in the mountains will include the use of an ice axe. There are instances when a leash connecting the hand to the tool is useful and times when a leash is undesirable. Other tools such as ski poles have leashes that are sometimes useful and sometimes not desirable. The idea is to remove all leashes from all tools and build a new device that combines the glove with the leash. There are basically two configurations for leashing the hand to a tool and both configurations are incorporated into the experimental design in order to assess the appropriateness of the basic concepts as well as to start to determine the final form of potential solutions (a heuristic search). The basic concepts to assess include: is the leash better on its own or incorporated into a glove(s); can one configuration satisfy all user needs. While the heuristic search will help determine specific product behaviours and attributes.

This experimental concept is in testing and I am disclosing it here to claim authorship and ownership.

The glove has a leash configured like a basic ice axe leash where the webbing connects the tool through a long strand that wraps around the back of the hand and below the wrist.

Ice Axe Leash Configuration

This leash configuration is like a large hand grip and allows connection of the hand with the tool in a variety of ways.

Large Grip Leash Configuration

Using the leash in self arrest position. Some say this is bad.

The loop fits over the adze and allows fast and efficient switching back and forth between hands. If the situation dictates and you don’t want to be attached to your tool then simply do not hook the loop over the adze. The loop is small and will not get in the way like a normal leash would. Also because the loop is not a long leash that attaches the hand to the head of the axe it may behave differently if the axe is pulled out of your hands during a self-arrest. It is my current opinion that I would rather have the axe still attached to me during a fall then lose the axe in the fall and not have it to self-arrest. Testing will tell me if this is to remain true in the future.

Using the leash for climbing.

Things to be assessed also include various concepts for hooking the leash on the axe. Is a slider the way to go? (requires stops at the top and bottom or pinched fingers) or should there be static hooks directly attached to the shaft that do not move? (any protuberance will change how the straight shaft behaves when being used in plunge mode).
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More secure ice axe configuration.

The small loop configuration is modelled after the basic form of the ski pole strap. The strap pulls on the pole from the top and it goes down the palm of the hand between the first finger and thumb and wraps around the back of the wrist.

Ski Pole Strap

Ski Pole Strap

Small Loop

I think of this as a tight grip behaviour and the large loop like a finger tip grip.

The plan is to develop a ski pole handle that behaves three ways. 1) a free position that allows forces to be directed down through the ski pole, but when pulled up the leash would come free with no resistance 2) a break away mode where forces down are the same but a pull up would not come away free until a minimum force was overcome 3) a locked position where large forces up would be needed to separate the pole and leash.

Small Leash Loop

Small leash loop configuration with ski pole.

The system has at many things to consider and three of these are: how to allow adjustment for the large loop; how to allow adjustment for the small loop; and how to allow adjustment around the wrist. How the loops need to behave during different performances is what will be determined. Solutions will have to optimize these three requirements.

Looking at both leash loops.