Self-rescue safety device
View Patent ↗A self-rescue device includes a rope operatively connected to a lifeline connector. The lifeline connector is releasably operatively connected to a frame member of the self-rescue device, and should a fall occur, the user releases the lifeline connector from the frame member. A centrifugal braking mechanism controls the rate at which the rope is paid out, which controls the rate of the user's descent.
1. A self-rescue safety device, comprising:
a frame configured and arranged to be connected to a safety harness;
a lifeline connector;
a rope having an intermediate portion interconnecting a first end and a second end, the first end being operatively connected to the frame, the second end being operatively connected to the lifeline connector;
a sheave through which a portion of the intermediate portion is routed, the sheave being rotatably operatively connected to the frame;
a releasable connecting member operatively connected to the frame and the lifeline connector, the releasable connecting member having an engaged position and a disengaged position, the engaged position engaging the lifeline connector and the disengaged position allowing the lifeline connector to be released from the releasable connecting member;
a brake assembly operatively connected to the frame, the brake assembly controlling a rate at which the rope is paid out when the lifeline connector is released;
the frame includes a brake cavity configured and arranged to receive at least a portion of the brake assembly, the brake cavity being defined by a frame surface, wherein the brake assembly comprises a rotor to which at least one pawl is pivotally connected and to which a rotor gear is operatively connected and at least one brake pad operatively connected to the at least one pawl, the at least one brake pad contacting the frame surface to control the rate at which the rope is paid out as the sheave rotates; and
a sheave gear operatively connected to the sheave, the sheave gear mating with the rotor gear operatively connected to the rotor.
2. The self-rescue safety device of claim 1 , further comprising a drum rotatably operatively connected to the frame, the first end of the rope being operatively connected to the drum, the brake assembly being operatively connected to the drum; and wherein at least a portion of the intermediate portion is paid out from and wound about the drum as the drum rotates.
3. The self-rescue safety device of claim 1 , further comprising a drum rotatably operatively connected to the frame, the frame interconnecting the drum and the releasable connecting member, wherein the sheave is rotatably operatively connected to the frame.
4. The self-rescue safety device of claim 1 , further comprising a biasing member engaged to assert a biasing force between the frame and the lifeline connector.
5. The self-rescue safety device of claim 1 , wherein the releasable connecting member comprises a mounting portion and a holder configured and arranged to engage the lifeline connector in the engaged position and to release the lifeline connector in the disengaged position.
6. The self-rescue safety device of claim 5 , wherein the mounting portion and the holder are pivotally connected and a knob interconnects the mounting portion and the holder in the engaged position to prevent pivoting, the knob is removable to pivot at least one of the mounting portion and the holder to position the releasable connecting member in the disengaged position.
7. A self-rescue safety assembly, comprising:
a safety harness including straps and a dorsal pad through which the straps are routed;
a housing defining a cavity;
a drum positioned within the cavity and rotatably operatively connected to the housing;
a rope having an intermediate portion interconnecting a first end and a second end, the first end being operatively connected to the drum, the second end being operatively connected to a lifeline connector, and wherein at least a portion of the intermediate portion is paid out from and wound about the drum as the drum rotates;
a sheave through which a portion of the intermediate portion is routed, the sheave being rotatably operatively connected to the drum;
a brake assembly operatively connected to the sheave, the brake assembly controlling a rate at which the rope is paid out from the drum;
a releasable connecting member operatively connected to the drum and the lifeline connector, the releasable connecting member having an engaged position and a disengaged position, the engaged position engaging the lifeline connector and the disengaged position allowing the lifeline connector to be released from the releasable connecting member;
a harness connector interconnecting the drum and the straps of the safety harness;
further comprising a frame operatively connected to the drum, the frame including a brake cavity configured and arranged to receive at least a portion of the brake assembly, the brake cavity being defined by a frame surface, wherein the brake assembly comprises a rotor to which at least one pawl is pivotally connected and to which a rotor gear is operatively connected and at least one brake pad operatively connected to the at least one pawl, the at least one brake pad contacting the frame surface to control the rate at which the rope is paid out from the drum as the sheave rotates; and
further comprising a sheave gear operatively connected to the sheave, the sheave gear mating with the rotor gear operatively connected to the rotor.
8. The self-rescue safety assembly of claim 7 , further comprising a frame interconnecting the drum and the releasable connecting member.
9. The self-rescue safety assembly of claim 8 , wherein the sheave is rotatably operatively connected to the frame.
10. The self-rescue safety assembly of claim 7 , further comprising a biasing member biasing the lifeline connector in an upright position.
11. The self-rescue safety assembly of claim 7 , wherein the releasable connecting member comprises a mounting portion and a holder configured and arranged to engage the lifeline connector in the engaged position and to release the lifeline connector in the disengaged position.
12. The self-rescue safety assembly of claim 11 , wherein the mounting portion and the holder are pivotally connected and a knob interconnects the mounting portion and the holder in the engaged position to prevent pivoting, the knob is removable to pivot at least one of the mounting portion and the holder to position the releasable connecting member in the disengaged position.
13. A method of self-rescue, comprising:
connecting a self-rescue device to a safety harness, the self-rescue device comprising a frame configured and arranged to be connected to a safety harness, a lifeline connector, a rope having an intermediate portion interconnecting a first end and a second end, the first end being operatively connected to the frame, the second end being operatively connected to the lifeline connector, a releasable connecting member operatively connected to the frame and the lifeline connector, the releasable connecting member having an engaged position and a disengaged position, the engaged position engaging the lifeline connector and the disengaged position allowing the lifeline connector to be released from the releasable connecting member, a brake assembly operatively connected to the frame, the brake assembly controlling a rate at which the rope is paid out when the lifeline connector is released;
turning a knob to break a first pin; and
removing a second pin operationally coupled to the knob from the releasable connecting member to disengage the lifeline connector thereby allowing the rope to pay out at a controlled rate.
14. The method of claim 13 , wherein the controlled rate is approximately 1½ to 6 feet per second.
15. The method of claim 13 , wherein removing the second pin from the releasable connecting member further comprises:
unscrewing the second pin away from the releasable connecting member.