Patent ID: 9661965
Date: 2017-05-30
CPC Classifications: A45F,A47L

Claim:
1. A backpack work apparatus comprising: a back carrier frame to be piggybacked by an operator, the back carrier frame having an upper part and a lower part; a drive motor mounted on the back carrier frame; a work tool driven by the drive motor; a pair of right and left shoulder straps each coupled to the back carrier frame for the operator to piggyback the back carrier frame, each of the shoulder straps having an upper end, a lower end and an intermediate point, the upper end being connected to the upper part of the back carrier frame and the lower end being connected to the lower part of the back carrier frame; a chest strap for linking the right and left shoulder straps, the chest strap having a first end joined to the intermediate point of one of the shoulder straps and a second end joined to the intermediate point of another of the shoulder straps; and an emergency release buckle device provided at the point where the first end of the chest strap is joined to the intermediate point of the one of the shoulder straps, the buckle device dividing the one of the shoulder straps into two parts, an upper strap and a lower strap, the upper strap forming a first coupling end toward the buckle device, the lower strap forming a second coupling end toward the buckle device and the first end of the chest strap constituting a third coupling end toward the buckle device, the buckle device normally buckling the first coupling end, the second coupling end and the third coupling end together, and being capable of releasing at least two of the first, second and third coupling ends from the buckle device via a one part motion.