# US 7,475,867 B1 · Fairleads for building platforms

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- Number: US 7,475,867 B1
- Document ID: US7475867B1
- Status: Granted
- Kind: B1
- Application number: 11/851,975
- Filed: 2007-09-07
- Granted: 2009-01-13
- Earliest claimed: 2007-09-07
- Assignees: SafeWorks, LLC
- Inventors: David Arevalo Romo
- Web page: https://patentgrep.com/patent/US7475867B1

## CPC

- E04G 3/30: suspended by flexible supporting elements, e.g. cables
- B63B 21/10: Fairleads
- B66D 1/36: Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
- B66D 1/605: {scaffolding winshes (B66D1/74 takes precedence)}
- B66F 11/04: for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations ({Working platforms on fork-lift trucks B66F9/127; } vehicle aspects of service vehicles B60P3/14; platforms for cleaning windows A47L3/02; devices for rescuing persons from buildings A62B1/02; liftable or lowerable platforms for use on ladders E06C7/16; maintenance travellers for bridges E01D19/10; scaffolds on an extensible sub-structure E04G1/22)
- E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06)
- B66D: CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS (winding or unwinding ropes or cables for feeding or storage purposes B65H; rope or cable winding or unwinding mechanisms for lifts B66B)
- B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00)

## Abstract

In various embodiments, an apparatus is disclosed comprising a platform, a hoisting machine mounted on the platform, and a rigging operable to raise and lower the elevator platform, said rigging passing through a fairlead, said fair lead stabilizing said elevator platform to a single location proximate a top of said elevator platform, said fairlead comprising two separable parts wherein said separable parts can be placed around said rigging without accessing an end of said rigging. Such a fairlead improves the serviceability of the equipment and reduce down time for replacement of a worn or damaged fairlead.

## Claims

### Claim 1

An apparatus comprising:
a platform;
a hoisting machine mounted on the platform;
a rigging operable to raise and lower the platform, said rigging further comprising a cable passing through a fairlead, said fairlead stabilizing said platform to a single location proximate a top of said platform, said fairlead comprising at least two separable parts wherein said each separable part further comprises fastening means and a radial gap on one side of said separable part.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein said rigging comprises one of at least wire, cable, chain or rope.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein said platform comprises one of a scaffolding, basket, or cabin.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein said separable parts are comprised of at least one of a polymer, plastic, wood, or nylon.

### Claim 5 (depends on 1)

The apparatus of claim 1, wherein said separable parts are interlocking.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein said separable parts are substantially identical mating pieces.

### Claim 7 (depends on 6)

The apparatus of claim 6, wherein said separable parts are self locking.

### Claim 8 (depends on 1)

The apparatus of claim 1, wherein said separable part further comprises an indication of a degree of wear.

### Claim 9 (depends on 1)

The apparatus of claim 1, wherein a first separable part is designed to be mounted under a fairlead support member and a second separable part is designed to mate to said first separable part by inverting said second separable part with respect to said first separable part other piece and rotating 180 degrees with respect to said first separable part.

### Claim 10 (depends on 9)

The apparatus of claim 9, wherein said separable part is designed to fit to a U-shaped fairlead mount.

### Claim 11 (depends on 10)

The apparatus of claim 10, wherein said separable part is generally circular, said gap is U-shaped with the curved area located co-centrically with said separable part, further comprising: an outer rim for mating with said fairlead mount; and an inner rim generally co-centric with said fairlead mount and forming a substantially enclosed coaxial opening when said first separable part is mated with said second separable part.

### Claim 12 (depends on 1)

The apparatus of claim 1, wherein said separable part further comprises at least one hole for mounting and locking.

### Claim 13 (depends on 12)

The fairlead of claim 12, wherein said fairlead further comprises an indication of a degree of wear.

### Claim 14 (depends on 12)

The fairlead of claim 12, wherein a first separable part is designed to be mounted under a fairlead support member and a second separable part is designed to mate to said first separable part by inverting said second separable part with respect to said first separable part other piece and rotating 180 degrees with respect to said first separable part.

### Claim 15 (depends on 14)

The fairlead of claim 14, wherein said fairlead is designed fit to a U-shaped fairlead mount.

### Claim 16 (depends on 15)

The fairlead of claim 15, wherein said separable part is generally circular, said gap is U-shaped with the curved area located co-centrically with said separable part, further comprising: an outer rim for mating with said fairlead mount; and an inner rim generally co-centric with said fairlead mount and forming a substantially enclosed coaxial opening when said first separable part is mated with said second separable part.

### Claim 17 (depends on 12)

The fairlead of claim 12, wherein said separable part further comprises at least one hole for mounting and locking.

### Claim 18

A fairlead for guiding and securing a rigging used with a hoisting device in an elevator platform, said fairlead comprising at least two separable parts wherein said each separable part further comprises fastening means and a radial gap on one side of said separable part.

### Claim 19 (depends on 18)

The fairlead of claim 18, wherein said fairlead is comprised of nylon.

### Claim 20 (depends on 18)

The fairlead of claim 18, wherein said fairlead is interlocking.

### Claim 21 (depends on 20)

The fairlead of claim 20, wherein said separable interlocking parts are identical mating pieces.

### Claim 22 (depends on 21)

The fairlead of claim 21, wherein said separable interlocking parts are self locking.

### Claim 23

An apparatus for restraining rigging movement on an elevator platform for building maintenance, said elevator platform having a hoisting machine coupled to a rigging, said rigging passing through a fairlead, said fair lead stabilizing said elevator platform to a single location proximate a top of said elevator platform, said fairlead comprising at least two separable parts wherein said each separable part further comprises fastening means and a radial gap on one side of said separable part.

### Claim 24 (depends on 23)

The apparatus of claim 23, wherein said rigging comprises one of at least wire, cable, chain or rope.

### Claim 25 (depends on 23)

The apparatus of claim 23, wherein said elevator platform comprises one of a scaffolding, basket, or cabin.

### Claim 26 (depends on 23)

The apparatus of claim 23, wherein said fairlead is comprised of nylon.

### Claim 27 (depends on 23)

The apparatus of claim 23, wherein said fairlead is interlocking.

### Claim 28 (depends on 27)

The apparatus of claim 27, wherein said separable interlocking parts are identical mating pieces.

### Claim 29 (depends on 28)

The apparatus of claim 28, wherein said separable interlocking parts are self locking.

### Claim 30 (depends on 23)

The apparatus of claim 23, wherein said fairlead further comprises an indication of a degree of wear.

### Claim 31 (depends on 23)

The apparatus of claim 23, wherein a first separable part is designed to be mounted under a fairlead support member and a second separable part is designed to mate to said first separable part by inverting said second separable part with respect to said first separable part other piece and rotating 180 degrees with respect to said first separable part.

### Claim 32 (depends on 31)

The apparatus of claim 31, wherein said fairlead is designed fit to a U-shaped fairlead mount.

### Claim 33 (depends on 32)

The apparatus of claim 32, wherein said separable part is generally circular, said gap is U-shaped with the curved area located co-centrically with said separable part, further comprising: an outer rim for mating with said fairlead mount; and an inner rim generally co-centric with said fairlead mount and forming a substantially enclosed coaxial opening when said first separable part is mated with said second separable part.

### Claim 34 (depends on 23)

The apparatus of claim 23, wherein said separable part further comprises at least one hole for mounting and locking.

### Claim 35

A method for replacing a fairlead used in an apparatus comprising a platform, a hoisting machine mounted on the platform, and a rigging operable to raise and lower the platform, said rigging passing through a fairlead, said fair lead stabilizing said platform to a single location proximate a top of said platform, said fairlead comprising at least two separable parts wherein said each separable part further comprises fastening means and a radial gap on one side of said separable part, the method comprising separating and removing a first pair of separable parts without accessing an end of said rigging, and installing a second pair of separable parts around said rigging without accessing an end of said rigging.

### Claim 36 (depends on 35)

The method of claim 35, wherein a first separable part is designed to be mounted under a fairlead support member and a second separable part is designed to mate to said first separable part by inverting said second separable part with respect to said first separable part other piece and rotating 180 degrees with respect to said first separable part.

### Claim 37

A method for replacing a fairlead used for guiding and securing a rigging used with a hoisting device in an elevator platform, said fairlead comprising at least two separable parts wherein said each separable part further comprises fastening means and a radial gap on one side of said separable part, the method comprising separating and removing a first pair of separable parts without accessing an end of said rigging, and installing a second pair of separable parts around said rigging without accessing an end of said rigging.

### Claim 38 (depends on 37)

The method of claim 37, wherein said first separable part is mounted under a fairlead support member and said second separable part is inverted and rotated 180 degrees to mate to said first separable part.