Personal escape device
View Patent ↗A personal escape device which can be used by men, women, and children, including physically disabled persons, to descend in a controlled and secure manner from high structures such as office buildings, multistory homes, and the like. The device is designed for a relatively low-cost, small size which may be used by payloads of variable weights. The rescue device of the invention may be a single-use device or a multi-use device.
1. A personal escape device, comprising:
A. a housing having a port,
B. a primary spool extending along a central axis and disposed within said housing opposite said port, said primary spool being rotatably coupled to said housing to permit rotation of said primary spool about said central axis,
C. an elongated cord having a proximal end and a distal and, said proximal end being affixed to said primary spool and said distal end extending through said port, said cord including a plurality of windings around said primary spool,
D. a secondary spool coupled to a first idler shaft extending along an idler axis parallel to said central axis, said secondary spool being rotatably coupled to said housing to permit rotation of said secondary spool about said idler axis, and said secondary spool including an elongated, circular cross-section core extending along said idler axis, said core having a lateral surface disposed about said idler axis, and wherein said cord includes two or more mutually adjacent, single layer full windings around said secondary spool between said primary spool and said port,
E. an anchor assembly extending from said distal end of said cord, including means for selectively coupling said distal end of said cord to an external object,
F. a payload coupler affixed to said housing for receiving a harness assembly for supporting a payload, and
G. an unwind control assembly including centrifugal assembly for controlling the rate of exit of said cord from said housing to be a predetermined function of time in response to a substantially constant pulling force on said distal end, and
i. wherein said unwind control assembly includes a centrifugal brake connected by a coupling assembly between said secondary spool and said housing, and
ii. wherein said centrifugal brake is disposed on a second idler shaft coupled to said housing and extending parallel to said central axis.
2. A device according to claim 1 wherein said secondary spool includes a conical outer surface for receiving said at least one winding.
3. A device according to claim 1 , further including:
a. an input cord guide element having an input central void region adapted to allow passage of said cord from said primary spool to said secondary spool, and
b. an output cord guide element having an output central void region adapted to allow passage of said cord from said secondary spool through said port,
wherein said input cord guide element and said output cord guide element are rigidly coupled to said housing, and wherein said input central void region and said output central void region are laterally offset in the direction of said idler axis.
4. A device according to claim 3 , wherein said cord extends from said primary spool, through said input central void region, at least one loop around said core, through said output central void region, and through said port.
5. A device according to claim 1 , wherein said lateral surface of said core is characterized by a relatively high coefficient of friction.
6. A device according to claim 5 , wherein said core is made of a resilient material.
7. A device according to claim 6 , wherein said resilient material is rubber.
8. A device according to claim 5 , wherein said lateral surface of said core is covered by a layer of rubber.
9. A device according to claim 5 , wherein said lateral surface of said core is textured metal.
10. A device according to claim 5 , wherein said lateral surface of said core is knurled metal.
11. A device according to claim 1 , further including a rewind kit for rewinding said cord onto said primary spool after at least partial deployment.
12. A device according to claim 11 wherein the rewind kit comprises a selectively activatable motor, selectively coupled to the primary spool for rewinding deployed cord, and a cable distribution assembly for controlling the distribution of cord rewound on said primary spool.