US20140166395A2

US20140166395A2 - Load balancing descending device

Info

Publication number: US20140166395A2
Application number: US12/924,909
Authority: US
Inventors: Barnett Tracy
Original assignee: Great Trango Holdings Inc
Current assignee: Great Trango Holdings Inc
Priority date: 2005-06-03
Filing date: 2010-10-07
Publication date: 2014-06-19
Also published as: US9016431B2; US20140054109A1; US20150202476A1

Abstract

A load balancing descending device for controlling the descent of a user descending on a rope carrying a load is provided. The rope has a decreasing rope free end as the user descends. The load balancing descending device comprises a first plate and a second plate. A first pin is positioned between the first plate and the second plate with the first pin spacing the first plate from and pivotally connecting the first plate to the second plate and the combined first plate and second plate having a first side and a second side. A second pin is positioned between the first plate and the second plate with the second pin spaced from the first pin. An attachment mechanism is formed in the first side of the combined first plate and second plate for attaching a user and/or load. The rope is wrapped in a serpentine manner about the first pin and the second pin between the first plate and the second plate with the rope free end exiting the combined first plate and second plate from the second side. As the user descends the rope, the length and weight of the rope free end decreases thereby causing the load balancing descending device to rotate moving the rope free end in a general direction from the first side toward the second side and automatically balancing the weight of the user and load against the weight of the rope free end in order to maintain a controlled rate of descent.

Description

The present application is a continuation-in-part of pending U.S. patent application Ser. No. 11/445,499, filed Jun. 1, 2006, entitled “Fast Rope Descending Device”, which claims benefit of priority of U.S. Provisional Patent Application, Ser. No. 60/687,234, filed Jun. 3, 2005, entitled “Fast Rope Descending Device”.

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a load balancing descending device and, more particularly, it relates to a load balancing descending device for controlling the descent of a user.
2. Description of the Prior Art
Soldiers who descend from helicopters into combat zones do not have the luxury of using standard rappel devices to control their rate of descent. It takes too long to engage and disengage the devices, the ropes are so thin that they get sucked into the helicopter's rotors and they typically allow only one soldier on the rope at a time. Additionally, the ropes typically apply friction in proportion to the amount of rope between the device and the ground. As the descending soldier approaches the ground there is less friction through the device because there is less rope weight and it becomes difficult to control the rate of descent. The currently accepted method is for the soldiers to slide down a roughly braided rope, approximately 50 mm in diameter, in the same manner as a fireman sliding down a pole. The technique is called fast-roping and requires no special equipment or devices. While this works well for a single soldier and his personal gear, it does not work when the soldier has an additional load such as a medical kit, a crew-served weapon, a canine unit, or other heavy equipment.
Accordingly, there exists a need for a load balancing descending device which automatically adjusts the amount of friction applied to the rope based on the combined weight of the soldier and his load. Additionally, a need exists for a load balancing descending device which automatically balances the weight of the soldier and his load against the weight of the free end of the rope in order to maintain a controlled rate of descent. Furthermore, there exists a need for a load balancing descending device which is easy to engage and disengage and allows a user to control the rate of descent with one hand.

SUMMARY

A load balancing descending device for controlling the descent of a user descending on a rope carrying a load is provided. The rope has a decreasing rope free end as the user descends. The load balancing descending device comprises a first plate and a second plate. A first pin is positioned between the first plate and the second plate with the first pin spacing the first plate from and pivotally connecting the first plate to the second plate and the combined first plate and second plate having a first side and a second side. A second pin is positioned between the first plate and the second plate with the second pin spaced from the first pin. An attachment mechanism is formed in the first side of the combined first plate and second plate for attaching a user and/or load. The rope is wrapped in a serpentine manner about the first pin and the second pin between the first plate and the second plate with the rope free end exiting the combined first plate and second plate from the second side. As the user descends the rope, the length and weight of the rope free end decreases thereby causing the load balancing descending device to rotate moving the rope free end in a general direction from the first side toward the second side and automatically balancing the weight of the user and load against the weight of the rope free end in order to maintain a controlled rate of descent.
In addition, the present invention includes a method for controlling the descent of a user descending on a rope carrying a load. The rope has a decreasing rope free end as the user descends. The method comprises providing a first plate, providing a second plate, positioning a first pin between the first plate and the second plate, spacing the first plate from the second plate, pivotally connecting the first plate to the second plate with the combined first plate and second plate having a first side and a second side, positioning a second pin between the first plate and the second plate, spacing the second pin from the first pin, attaching a user and/or load to the first side of the combined first plate and second plate, wrapping the rope in a serpentine manner about the first pin and the second pin between the first plate and the second plate, exiting the rope free end of the combined first plate and second plate from the second side, descending the rope such that the length and weight of the rope free end decreases, rotating the load balancing descending device, moving the rope free end in a general direction from the first side toward the second side, and automatically balancing the weight of the user and load against the weight of the rope free end in order to maintain a controlled rate of descent.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional side view illustrating a load balancing descending device, constructed in accordance with the present invention;

FIG. 2 is a perspective view illustrating the load balancing descending device of FIG. 1, constructed in accordance with the present invention;

FIG. 3 is an elevational side view illustrating the load balancing descending device of FIG. 1, constructed in accordance with the present invention;

FIGS. 4 a and 4 b are photos illustrating the load balancing descending device of FIG. 1, constructed in accordance with the present invention, with the load balancing descending device in use by a user;

FIG. 5 is an elevational side view illustrating the left side of the load balancing descending device, constructed in accordance with the present invention;

FIG. 6 is another elevational side view illustrating the left side of the load balancing descending device, constructed in accordance with the present invention;

FIG. 7 is still another elevational side view illustrating the left side of the load balancing descending device, constructed in accordance with the present invention;

FIG. 8 is an elevational side view illustrating the right side of the load balancing descending device, constructed in accordance with the present invention;

FIG. 9 is another elevational side view illustrating the right side of the load balancing descending device, constructed in accordance with the present invention;

FIG. 10 is still another elevational side view illustrating the right side of the load balancing descending device, constructed in accordance with the present invention;

FIGS. 11 a-11 d are elevational side views and end views illustrating the load balancing descending device, constructed in accordance with the present invention;

FIG. 12 is an exploded view illustrating the load balancing descending device, constructed in accordance with the present invention; and

FIG. 13 is an elevational side view illustrating a carabiner for use with the load balancing descending device, constructed in accordance with the present invention.

Before explaining the disclosed embodiment of the present invention in detail, it is to be understood that the invention is not limited in its application to the details of the particular arrangement shown, since the invention is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As illustrated in FIGS. 1-13, the present invention is a load balancing descending device, indicated generally at 10, for use with large ropes 12, such as found in military operations. As a user descends using the load balancing descending device 10, the load balancing descending device 10 gradually slows the descent by rotating as the length and weight of the free rope 14 decreases. The load balancing descending device 10 of the present invention can be used by military personnel, climbers, and others during any type of climbing activity including, but not limited to, military operations, mountaineering, rock climbing, safety descents during emergencies and rescues, etc. Other uses for the load balancing descending device 10 not specifically set forth herein are also within the scope of the present invention. It should also be noted that the load balancing descending device 10 can be used with small ropes, also.
The load balancing descending device 10 of the present invention is preferably constructed from a steel material, however, constructing the load balancing descending device 10 from other rigid, durable materials is within the scope of the present invention.
As illustrated in FIGS. 2 and 3, the load balancing descending device 10 of the present invention includes a swivel plate 16 having a substantially key-shaped slotted aperture 18, a substantially round aperture 20, and a plurality of carabiner receiving apertures 22. The slotted aperture includes a wide portion 24 and a narrow portion 26. The load balancing descending device 10 further includes a base plate 28 having a first substantially round aperture 30, a second substantially round aperture 32, and a plurality of carabiner receiving apertures 34. A carabiner 36 is receivable within either of the carabiner receiving apertures 22, 34 formed in both the swivel plate 16 and the base plate 28.
As illustrated in FIGS. 5-12, in an embodiment of the load balancing descending device 10 of the present invention, the swivel plate 16 and the base plate 28 have an angled portion 38. The angled portion 38 allows the portion of the swivel plate 16 and base plate 28 about the carabiner receiving apertures 22, 34 to contact each other when assembled together, as will be discussed in further detail below.
As best illustrated in FIG. 12, the load balancing descending device 10 of the present invention further includes a first dowel 40 positionable between the swivel plate 16 and the base plate 28 and a second dowel 42 positionable between swivel plate 16 and the base plate 28. The first dowel 40 and the second dowel 42 are preferably constructed from aviation grade aluminum (2023 T-3) although constructing the first dowel 40 and the second dowel 42 from other rigid, durable materials is within the scope of the present invention.
A first bolt 44 extends through the round aperture 20 on the swivel plate 16, the first dowel 40, and the first round aperture 30 of the base plate 28. The first bolt 44 is secured in place by a nut 46 or the like. Washers 48 and lock washers 50 further maintain the position of the first bolt 44 to the swivel plate 16 and the base plate 28. The connection between the swivel plate 16 and the base plate 28 through the first bolt 44 allows the swivel plate 16 to rotate relative to the base plate 28 and the base plate 28 to rotate relative to the swivel plate 16.
A second bolt 52 extends through the slotted aperture 18 on the swivel plate 16, the second dowel 42, and the second round aperture 32 of the base plate 28. The second bolt 52, similar to the first bolt 44, is secured in place by a nut 46 or the like. Washers 48 and lock washers 50 further maintain the position of the second bolt 52 to the swivel plate 16 and the base plate 28. During use, the second bolt 52 travels from the wide portion 24 of the slotted aperture 18 to the narrow portion 26 of the slotted aperture 26 of the swivel plate 16, being releasably retained therein, as will be described in detail below.
Preferably, the first bolt 44 and the second bolt 52 have a length of approximately four (4″) inches although having a bolt with length greater than or less than approximately four (4″) inches is within the scope of the present invention.
In operation of the load balancing descending device 10 of the present invention, the carabiner 36 is removed from the carabiner apertures 22, 34 and the load balancing descending device 10 is constructed using the first and second dowels 40, 42, first and second bolts 44, 52, washers 48, and lock washers 50, as described above. The swivel plate 16 is then rotated relative to the base plate 28 exposing the first bolt 44 and the second bolt 52. Next, the rope 12 is positioned about the first bolt 44 and the second bolt 52, as best illustrated in FIGS. 1 and 2. The swivel plate 16 is then rotated until the second bolt 52 is received within the wide portion 24 of the slotted aperture 18. The swivel plate 16 is rotated a little further until the second bolt 52 is received within the narrow portion 26 of the slotted aperture 18. Finally, the carabiner 36 is inserted into and releasably secured within the carabiner receiving apertures 22, 34.
The load balancing descending device 10 of the present invention allows a rapid, controlled descent of a user. As illustrated in FIG. 1, as the user descends down the rope 12, the rope tail 14 decreases in length weight thereby causing the load balancing descending device 10 to automatically rotate impeding the movement of the rope 12 about the first and second bolts 44, 52 and creating greater friction between the first and second bolts 44, 52 and the rope 12. Therefore, as the user approaches the ground or other landing area, the user's rate of descent will slow thereby allowing a safe, controlled landing.
In sum, the load balancing descending device 10 of the present invention automatically adjusts the amount of friction applied to the rope based on the combined weight of the soldier and his load. The load balancing descending device 10 automatically balances the weight of the soldier and his load against the weight of the free end of the rope in order to maintain a controlled rate of descent. Furthermore, the load balancing descending device is easy to engage and disengage and allows a user to control the rate of descent with one hand.
The foregoing exemplary descriptions and the illustrative preferred embodiments of the present invention have been explained in the drawings and described in detail, with varying modifications and alternative embodiments being taught. While the invention has been so shown, described and illustrated, it should be understood by those skilled in the art that equivalent changes in form and detail may be made therein without departing from the true spirit and scope of the invention, and that the scope of the present invention is to be limited only to the claims except as precluded by the prior art. Moreover, the invention as disclosed herein, may be suitably practiced in the absence of the specific elements which are disclosed herein.

Claims

1. A load balancing descending device for controlling the descent of a user descending on a rope carrying a load, the rope having a decreasing rope free end as the user descends, the load balancing descending device comprising:

a swivel plate and a base plate, the swivel plate and base plate aligning and joining to form a plate set having an attachment end, a rope end, and a central region located between the attachment end and the rope end;

a first pin positioned between the swivel plate and the base plate, the first pin joining the swivel plate and the base plate at the rope end and such that the swivel plate pivots about the first pin;

a second pin positioned between the swivel plate and the base plate, the second pin located at the central region of the plate set and fixed to the second plate;

an attachment means formed in the attachment end of the plate set, the attachment means providing for attachment of the plate set with a user and/or load;

wherein the first and second pins facilitate wrapping a rope in serpentine manner about the pins and between the swivel plate and the base plate, such that a free end of the rope exits the plate set from the rope end; and

wherein the load balancing descending device prevents the rope from contacting itself within the device any other portion of the rope; and

wherein as the load balancing descending device descends the rope, the length and weight of the free end of the rope decreases, thereby causing the load balancing descending device to rotate about a long axis of the second pin to move the rope end rotationally upward to increase the friction applied to the rope at the first pin and the second pin, thereby automatically balancing weight of the user and/or load with the weight of the free end of the rope in order to slow a rate of descent as the user descends the rope.

2. The load balancing descending device of claim 1, the load balancing descending device configured to automatically adjust the amount of friction applied to the rope based on the weight of the user and/or load by adjusting the amount of rotation about the long axis of the second pin.

3. The load balancing descending device of claim 1 wherein:

the swivel plate has a first aperture and a second aperture,

the base plate has a closed first aperture and a closed second aperture,

the first aperture of the swivel plate is alignable with the closed first aperture of the base plate,

the second aperture of the swivel plate is alignable with the closed second aperture of the base plate,

the second first pin extends through the second aperture of the swivel plate and the closed second aperture of the base plate,

the second pin is movable within the second aperture, and

the first pin extends through the first aperture of the swivel plate and the closed first aperture of the base plate;

wherein the first and second pins secure the swivel plate with the base plate.

4. The load balancing descending device of claim 3, wherein the load balancing descending device is configured to impede the movement of the rope about the first and second pins by increasing the amount of friction applied to the rope, thereby reducing the rate of descent as the user and/or load approaches the end of the rope.

5. The load balancing descending device of claim 3 wherein the second aperture of the swivel plate is a substantially key-shaped slotted aperture and the first aperture of the swivel plate is a substantially round aperture, the slotted aperture having a wide portion and a narrow portion, the second pin moveable into the wide portion of the slotted aperture and from the wide portion of the slotted aperture to the narrow portion of the slotted aperture of the swivel plate during assembly, and wherein the second pin is secured in a fixed position within the key-shaped slotted aperture during use.

6. The load balancing descending device of claim 3 wherein the first aperture of the base plate is a substantially round aperture and the second aperture of the base plate is a substantially round aperture.

7. The load balancing descending device of claim 3, further comprising:

a plurality of same sized swivel plate carabiner receiving apertures formed in the swivel plate; and

a plurality of same sized base plate carabiner receiving apertures formed in the base plate;

wherein the swivel plate carabiner receiving apertures are aligned with the base plate carabiner receiving apertures and wherein a first angle formed between a first receiving aperture, the first pin and the second pin is larger than a second angle formed between a second receiving apertures, the first pin and the second pin.

8. The load balancing descending device of claim 7, further comprising:

a carabiner receivable within the aligned carabiner receiving apertures.

9. The load balancing descending device of claim 3, further comprising:

an angled portion formed on each of the swivel plate and the base plate, the angled portions allowing a portion of the swivel plate and base plate to contact each other when assembled together.

10. The load balancing descending device of claim 3, wherein the first and second pins comprise first and second bolts, each of the first and second bolts secured with a nut.

11. A method of manufacturing a load balancing descending device for controlling the descent of a user descending on a rope, the method comprising:

forming a base plate and a swivel plate, each of the base plate and swivel plate having an attachment end, a rope end and a central region located between the attachment end and the rope end;

forming one or more swivel plate carabiner receiving apertures in the swivel plate at the attachment end;

forming one or more base plate carabiner receiving apertures in the base plate at the attachment end;

securing a first pin to the base plate at the rope end;

securing a second pin to the base plate at its central region;

pivotally connecting the rope end of the swivel plate to the first pin;

forming an aperture in the central region of the swivel plate for accepting the second pin;

providing an angle between one of the one or more base plate carabiner receiving apertures, the second pin and the first pin, such that, when in operation, the load balancing descending device automatically increases the amount of friction applied to the rope during a descent by rotating in its entirety about a long axis of the second pin based on the decreasing length/weight of the rope free end, thereby automatically slowing the rate of descent as the load balancing descending device approaches the end of the rope.

12. The method of claim 11, comprising:

automatically adjusting the amount of friction applied to the rope based on the combined weight of the user and a load associated with the user.

13. The method of claim 11 wherein the swivel plate has a first aperture and a second aperture, the base plate has a closed first aperture and a closed second aperture, the first aperture of the swivel plate alignable with the closed first aperture of the base plate, the second aperture of the swivel plate alignable with the closed second aperture of the base plate, and wherein the first pin extends through the first aperture of the swivel plate and the closed first aperture of the base plate, the pin movable within the first aperture, and the second pin extending through the second aperture of the swivel plate and the closed second aperture of the base plate.

14. The method of claim 13 wherein the first aperture of the swivel plate is a substantially key-shaped slotted aperture and the second aperture of the swivel plate is a substantially round aperture, the slotted aperture having a wide portion and a narrow portion, the swivel plate moveable relative to the base plate.

15. The method of claim 13 wherein the closed first aperture of the base plate is a substantially round aperture and the closed second aperture of the base plate is a substantially round aperture.

16. The method of claim 13, further comprising:

aligning the swivel plate carabiner receiving apertures with the base plate carabiner receiving apertures.

17. The method of claim 16, wherein the first angle is greater than a second angle formed between (a) a second one of the plurality of base plate carabiner receiving apertures, (b) the first pin, and (c) the second pin.

18. The method of claim 13, further comprising:

forming an angled portion on each of the swivel plate and the base plate, the angled portions providing a point of contact between the swivel plate and base plate when assembled together.

19. A load balancing descending device for controlling the descent of a user descending on a rope, the rope having a decreasing rope free end as the user descends, the descending device comprising:

a swivel plate having a first substantially key-shaped slotted aperture and a second, substantially round aperture, the slotted aperture having a wide portion and a narrow portion;

a base plate having a substantially round, closed first aperture and a substantially round, closed second aperture, the first aperture of the swivel plate alignable with the closed first aperture of the base plate, the second aperture of the swivel plate alignable with the closed second aperture of the base plate;

a plurality of swivel plate carabiner receiving apertures formed in the swivel plate;

a plurality of base plate carabiner receiving apertures formed in the base plate and alignable with the swivel plate carabiner receiving apertures;

an angled portion formed about the carabiner receiving apertures on each of the swivel plate and the base plate, the angled portions providing a point of contact between the swivel plate and base plate when assembled together;

a first securement mechanism extending through the first aperture of the swivel plate and the closed first aperture of the base plate; and

a second securement mechanism extending through the second aperture of the swivel plate and the closed second aperture of the base plate;

a first hollow dowel configured with the first securement means, the first dowel positionable within the wide portion of the key-shaped slotted aperture and moveable from the wide portion of the slotted aperture to the narrow portion of the slotted aperture;

a second hollow dowel configured with the second securement means;

wherein, when assembled for use, the rope is wrapped in a serpentine manner about the first hollow dowel and the second hollow dowel between the swivel plate and the base plate to create friction between the first and second hollow dowels and the rope, thereby impeding movement of the rope through the device;

wherein each portion of the rope within the device is free from contact with any other portion of the rope within the device; and

wherein as the user descends the rope, the length and weight of the rope free end decreases, thereby causing the load balancing descending device to rotate about a long axis of the first securement mechanism to change an angle of the rope about each dowel, which increases the friction applied to the rope at the first dowel and the second dowel, thereby automatically balancing the weight of the user against the weight of the rope free end in order to control the rate of descent.

20. The load balancing descending device of claim 19, wherein upon rotation of the load balancing descending device, the load balancing descending device automatically adjusts the amount of friction applied to the rope based on the weight of the user.

21. A load balancing descending device, comprising:

a swivel plate and a base plate each including an attachment mechanism and coupled together by first and second pins therebetween, wherein the swivel and base plates pivot about the second pin to generate friction on a rope serpentinely wrapped about the first and second pins, without contacting itself, thereby providing a controlled descent of a user and/or load attached to the attachment mechanism and descending the rope.

22. The load balancing descending device of claim 21, the device increasing friction on the rope during descent of the rope.

23. The load balancing descending device of claim 22, wherein increasing friction is based on decreasing angles formed by the rope about the first and second pins as the device rotates about the second pin.