| 摘要 |
An improved fall protection system has been developed. The system functions by: (1) arresting the fall of such users, thereby protecting them from impact with the ground which could cause serious injury or death; (2) providing a method of recovery and escape from a fall-arresting device by providing a user with a controlled descent back to the ground or to a lower place of safety at a safe and gradual rate of descent; (3) providing greater simplicity and wearer comfort in fall-arresting and self-recovery devices; and (4) incorporating gear storage capability into such protective devices, in order to eliminate the need to wear a separate gear storage pack, vest, tool belt, or other such garment or accessory. |
| 主权项 |
1. A fall arresting and emergency descent system comprising:
a safety harness having a pair of load bearing straps configured to extend from a junction area on a back of the safety harness where the straps intersect, over shoulders of a harness wearer, and over a chest of the harness wearer, and downward from the chest, each of the pair of load bearing straps terminating in a first end, and in the back of the harness, the pair of load-bearing straps extending downward from the junction area on the back of the harness, around legs of the harness wearer, each of the pair terminating in a second end, the respective first and second ends adapted to be connected together to form a pair of leg supporting loops, a length of descent line, configured in a coil, having a first end and a second end, and the coil of descent line is contained within an enclosure, the enclosure being securely fastened to the safety harness, the enclosure fitted with an internal, central spindle, upon which the first end of the coil of descent line is placed, to permit free rotation of the coil and free extraction of the length of descent line from the coil, the descent line extending from the enclosure to an entry point of a controlled-descent device for self-lowering of the harness wearer back to a safe platform or to ground level, the controlled descent device being attached to one or more of the pair of load-bearing straps, the controlled descent device further comprising: a primary braking system, comprising
a plate having a first face plane and a second face plane, the plate being fitted with at least two spaced apart rectangular holes in the plate, which holes penetrate the plate completely from the first face plane through to the second face plane, and edge and corner surfaces of the at least two holes comprising friction inducing surfaces to induce friction upon a length of descent line as the descent line is pulled through the at least two spaced apart rectangular holes, and the at least two spaced apart rectangular holes forming a convoluted pathway through which the descent line must pass as the descent line is pulled through the at least two spaced apart rectangular holes by weight of the harness wearer after a fall, the friction inducing surfaces and convoluted path causing frictional resistance to the passage of the descent line through the at least two spaced apart rectangular holes, in order to provide a gradual descent for the harness wearer who has fallen from an elevated structure,an exit point at the upper end of the plate, from which the second end of the descent line is pulled during a descent of the harness wearer, and the second end of the descent line which exits at an upper end of the plate being fitted with a connector to enable attachment of the second end of the descent line to a tether which connects to an elevated anchor point, the primary braking system further comprising: a secondary braking system which permits the harness user to manually initiate, or to slow, or to automatically stop a descent after an arrested fall, the secondary braking system comprising: a braking pad, having a surface which bears upon the descent line at at least one point, and which exerts force and therefore frictional resistance upon the descent line as a result of a biased-loaded brake tensioning assembly which holds the braking pad firmly against the descent line, and an actuator line attached to the braking pad,the secondary braking system preventing automatic payout of the descent line after an arrested fall, unless and until the secondary braking system is activated manually by the harness wearer by pulling on the actuator line to initiate a controlled descent after an arrested fall, which controlled descent rate may be slowed by selective application of the secondary braking system by the harness wearer during a descent, wherein the braking pad is attached to an actuator line which travels over one shoulder and terminates on a front of one of the pair of load bearing straps, whereby the harness wearer may initiate, control, or stop a controlled descent after an arrested fall through selective manual control of the braking pad by pulling or releasing the actuator line. |
