Harness systems having adjustable spines

A harness system comprising:

• a shoulder member;
• a belt member;
• and
• a spine comprising:
• an inner plate connected to the shoulder member, the inner plate comprising:
• a plurality of locking notches arranged in a direction from the belt member to the shoulder member;
• and
• an outer plate connected to the belt member, the outer plate comprising:
• a pair of hinged locking elements having tabs to selective engage the locking notches, wherein the inner plate is in sliding engagement with the outer plate and the inner plate is lockable into a plurality of positions with respect to the outer plate based on the locking notches to which the tabs of the pair of hinged locking elements are engaged.

A clamping system for a bull handle of a power equipment, the clamping system comprising:

• an upper clamp member;
• a rotational position locking member having a plurality of first mating elements, wherein some of the plurality of first mating elements are arc segments and some of the plurality of first mating elements are line segments that extend from a center of the rotational position locking member to edges of the rotational position locking member;
• and
• a lower clamp member positioned between the upper clamp member and the rotational position locking member, the lower clamp member comprising:
• a plurality of second mating elements that are to mate with the plurality of first mating elements, wherein some of the plurality of second mating elements are arc segments and some of the plurality of second mating elements are line segments that extend from a center of the lower clamp member to edges of the lower clamp member;
• and
• wherein the bull handle is to be held between the upper clamp member and the lower clamp member and wherein the plurality of first mating elements and the plurality of second mating elements are arranged to enable the bull handle to be securely held in either a storage position or usage position while preventing the bull handle from being securely held when in a position between the storage position and the usage position.