Energy-absorbing unit for self-retracting lifeline

Inventors: Christopher W. Coyle (Eagan, MN); Michael N. Milbright (Red Wing, MN)

Assignee: 3M INNOVATIVE PROPERTIES COMPANY

A62B35/04 A62B35/0093

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Quick Facts

Patent No.: US 12685884
App. No.: 17/767,017
Granted: Jul 21, 2026
Kind: B2

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Abstract

An energy-absorbing unit with a first end bearing a modular connector that is disconnectably connectable to a complementary modular connector of a cable of a self-retracting lifeline, and with a second end bearing a fastener that is fastenable to a dorsal connection point of a fall-protection harness. Uses of such units in combination with self-retracting lifelines and fall-protection harnesses.

Claims (23)

1 . A self-retracting lifeline fall-protection apparatus comprising:

a base unit comprising a housing and a reel that is rotatably connected to the housing;

a load-bearing cable with a first end that is attached to the reel of the base unit of the self-retracting lifeline and with a second end that is attached to a first modular connector;

and,

an energy-absorbing unit comprising an energy absorber with a first end to which is attached a second modular connector that is disconnectably connected to the first modular connector and with a second, opposing end to which is attached a fastener that is configured to be fastened to a dorsal connection point of a fall-protection harness.

2 . The self-retracting lifeline of claim 1 wherein the energy absorber comprises at least one elongate length of webbing comprising at least one elongate portion that is folded upon itself multiple times to form overlapping sections at least some of which are joined to each other.

3 . The self-retracting lifeline of claim 2 wherein a first terminal portion of a first end of the elongate length of webbing passes through a through-opening of the second modular connector and is turned back on itself and attached to itself thereby causing the second modular connector to be attached to the first end of the energy absorber.

4 . The self-retracting lifeline of claim 2 wherein a second terminal portion of a second, opposing end of the elongate length of webbing passes through a through-opening of the fastener and is turned back on itself and attached to itself thereby causing the fastener to be attached to the second end of the energy absorber.

5 . The self-retracting lifeline of claim 1 wherein the fastener that is attached to the second end of the energy absorber is a hook.

6 . The self-retracting lifeline of claim 1 wherein the dorsal connection point comprises a dorsal D-ring.

7 . The self-retracting lifeline of claim 1 wherein the first modular connector is a male modular connector and the second modular connector is a female modular connector.

8 . The self-retracting lifeline of claim 7 wherein the first modular connector comprises a loop portion from which a male member of the first, male modular connector extends, wherein the loop portion defines a through-opening, and wherein a terminal portion of the second end of the cable passes through the through-opening of the loop portion and is turned back on itself and attached to itself thereby causing the second end of the cable to be attached to the first, modular connector.

9 . The self-retracting lifeline of claim 1 wherein the first and second modular connectors are configured to allow automatic engagement of the first and second connectors into a connected condition and to require the second modular connector to be actuated into an unlocked state before the first and second modular connectors can be disengaged into a disconnected condition.

10 . The self-retracting lifeline of claim 1 wherein the first modular connector is a female modular connector and the second modular connector is a male modular connector.

11 . The self-retracting lifeline of claim 1 wherein the energy-absorbing unit is configured to comprise a total elongate length, including the length of the energy absorber, the second modular connector and the fastener, of from 8 inches to 24 inches.

12 . A fall-protection system comprising the self-retracting lifeline of claim 1 and a fall-protection harness configured to be worn by a human user, wherein the fastener of the energy-absorbing unit is fastened to a dorsal connection point of the fall-protection harness so that the cable of the self-retracting lifeline is connected to the fall-protection harness.

13 . A kit comprising the self-retracting lifeline of claim 1 and further comprising at least one additional energy-absorbing unit that is identical to the energy-absorbing unit of claim 1 but that is not connected to the self-retracting lifeline.

14 . A self-retracting lifeline fall-protection apparatus comprising:

a base unit comprising a housing and a reel that is rotatably connected to the housing;

a load-bearing cable with a first end that is attached to the reel of the base unit of the self-retracting lifeline and with a second end that is attached to a first modular connector;

and,

wherein the first modular connector and the second modular connector are a pair of complementary modular connectors, with the first modular connector not being connectable to any connector other than the second modular connector and with the second modular connector not being connectable to any connector other than the first modular connector.