Lineman Harness Three-Point Attachment Weight Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing safety harnesses for linemen restrict blood flow and vision due to their design, particularly when used for fall protection and rescue operations, as they often require a single point of attachment on the back, leading to uneven weight distribution and potential strain on the legs.
Innovation Solution
A three-point attachment system for full-body harnesses placed on the back, with additional loops for connecting multiple users, ensures even weight distribution, reduces visual obstruction, and minimizes the risk of accidental loosening or improper wearing by integrating locking elements into the harness design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single point attachment on the back is used, then the harness structure is simple, but the weight distribution becomes uneven causing strain on the legs and restricting blood flow
Solution Approach 1:
The single attachment point is segmented into three separate attachment points: one at the upper back and two at the lower back on either side. This segmentation distributes the load across multiple points rather than concentrating it at one location, preventing excessive strain on the legs and maintaining proper blood flow while still keeping the overall structure relatively simple.
2Ease of operation
If front-attached harness is used, then the safety cable is easily accessible, but it restricts vision and movement of the lineman
Solution Approach 1:
Instead of attaching the safety cable to the front of the body as in conventional harnesses, the attachment point is inverted to the upper back. This allows the lineman to work without vision or movement restrictions while the safety cable remains easily accessible through the back D-ring, eliminating the harmful effects of front attachment.
3Ease of operation
If back-attached harness with leg loops is used, then the lineman is supported from the back, but the leg loops tighten and restrict blood flow in the legs
Solution Approach 1:
The single back attachment point is segmented into three points: one upper back attachment and two lower back attachments positioned on either side. This segmentation provides back support while distributing the load to prevent leg loop tightening and blood flow restriction, maintaining both ease of operation and reliability.
4Reliability
If connecting rope is placed in front of the lower lineman, then the connection between linemen is secure, but the vision of the lower person is restricted
Solution Approach 1:
The connection arrangement is inverted by placing the attachment points on the backs of both linemen. The connecting rope runs between the back D-rings of the upper and lower linemen, securing the connection while eliminating vision restrictions for the lower lineman, thus maintaining connection security without generating harmful visual obstruction.
Data Source
AI summary
An integral lineman safety harness system, having: a body harness having: a belt; a back ring; a left belt strap; and a right belt strap; and a harness adapter having: a first strap having a first top end; wherein a first harness loop at a first bottom end and the left belt strap are sewn around a first ring element; a second strap having a second top end; wherein a second harness loop at a second bottom end and the right belt strap are sewn around a second ring element; a third strap having a third top end; wherein a back loop at a third bottom end is sewn around the back ring; wherein the first strap, the second strap, and the third strap join at the first top end, the second top end, and the third top end into a single top loop configured to receive a locking element.