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Automatically adjustable climbing harness
| Details |
Inventors: Markwell, John H.; Isenhart, Kyle;
Assignee:
Primary Examiner: Britts; Ramon S.
Assistant Examiner: Chin-Shue; Alvin
Attorney, Agent or Firm: Fallow; Charles W., Hoffman; Martin P., Wasson; Mitchell B.
A seat harness for mountain climbers is formed from a continuous length of woven fabric webbing having, at intervals, transverse slots formed therethrough by the weaving process. The leg loops of the harness are formed by passing the ends of the webbing through certain of its own slots. The leg loops are drawn snug while applying the harness; one size harness thus adapts to all leg sizes, avoiding the need for leg loop adjustment buckles. A chest harness formed of the same type webbing is also disclosed. |
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DETAILED DESCRIPTION We have accordingly developed a seat harness for mountain climbers, having simplified construction and automatic leg loop adjustment.
According to our invention, a seat harness is formed from a single length of webbing, both of the leg loops and the waist belt being continuous.
Each leg loop is formed by a length of webbing passing downward from the waist belt through the wearer's crotch, below his hip and outward around the upper thigh, terminating at a front portion crossing the body below the hips and common to each leg loop.
The webbing from the waist belt passes through slots extending laterally through the webbing in the front piece, thus forming a noose which adjusts automatically to the wearer's leg size when the waist belt is tightened during application.
We have discovered a webbing material, previously used in other technical fields, that has proven especially useful for this construction, specifically, a nylon webbing normally used to construct cargo nets.
This material, available from Murdock Webbing Company, Inc.
, Central Falls, R.
I.
satisfying Military Specification No.
Mil 23223.
Type 1, is approximately 13/4" wide and has a breaking strength of 6500 lbs.
The distinguishing feature of this material, which we have employed to advantage, is that it has transverse slots woven into it by the manufacturer.
Thus, the strength of the slots does not depend on the strength of transverse stitching, which has previously been necessary to define slots in harness webbing.
See U.
S.
Pat.
No.
4,121,688 for an example of prior art construction, or the stitching closing the loops 22 in U.
S.
Pat.
No.
2,979,153.
Not only do the recurring slots (every eight inches of web length) greatly facilitate belt manufacture by making stitching steps unnecessary, they also have strength that would be difficult to duplicate by stitching.
In one test, 3/8" diameter pins were placed in the slots and were then forced away from one another.
Failure occurred at 5000 lbs.
tension, nearly the breaking strength of the webbing itself
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Exercise Devices2 
