# US 2019/0169002 A1 · Pulley for high-efficiency winch

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- Number: US 2019/0169002 A1
- Document ID: US20190169002A1
- Status: Published application
- Kind: A1
- Application number: 16/269,474
- Filed: 2019-02-06
- Published: 2019-06-06
- Earliest claimed: 2013-04-22
- Assignees: Kite Gen Research S.R.L.
- Applicants: Kite Gen Research S.R.L.
- Inventors: Massimo IPPOLITO
- Web page: https://patentgrep.com/patent/US20190169002A1

## CPC

- B66D 1/7415: {Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees}
- B66D 1/74: Capstans
- F16H 55/50: Features essential to rope pulleys
- Y02E 10/70: Wind energy
- 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)
- F16H: GEARING
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An improved pulley for a winch is described, in contact with at least one section of rope included between an inlet section connected to a working load and an outlet section connected to a resisting load, comprising a plurality of peripheral supports deformable depending on a length variation of such section of rope.

## Claims

### Claim 1

A Pulley for winch, in contact with at least one section of rope included between an inlet section, connected to a working load, and a outlet section, with minimum or null tension, said improved pulley comprising a kinematic chain formed of peripheral supports, each of said peripheral supports being an articulated quadrilateral composed of at least one frame integral with at least one disk, at least one crank, at least one rocker-type rod and at least one connecting rod in contact with said section of said rope, characterized in that each one of said peripheral supports is connected to two of said adjacent peripheral supports through a union of forks integral with said crank, respectively with a first fork integral with a first adjacent crank, and with a second fork integral with a second adjacent crank.

### Claim 2 (depends on 1)

The pulley according to claim 1, characterized in that each one of said peripheral supports is actuated through a motor according to a reciprocal motion law.

### Claim 3 (depends on 1)

The pulley according to claim 1, characterized in that said crank is composed of a collar-type eccentric, whose internal axis is occupied by a pin at whose ends said forks are placed, and in that said forks are geometrically configured with an offset (T) with respect to a plane perpendicular to said axis of said pin.

### Claim 4 (depends on 3)

The pulley according to claim 3, characterized in that said reciprocal and offset motion of each one of said peripheral supports is made by means of a mechanism kinematically equivalent to an articulated pentalateral device.

### Claim 5 (depends on 4)

The pulley according to claim 4, characterized in that two of five rods composing said articulated pentalateral device are mechanically made through eccentrical rotors having independent rotation speeds and predetermined phases, one of said independent rotation speeds being three times the other.

### Claim 6 (depends on 1)

The pulley according to claim 1, characterized in that a radial profile of each one of said peripheral supports, measured in a plane X-Z parallel to a rotation axis of said pulley, is subjected to an exponential function to be adapted to a tension gradient variable along said rope (1).

### Claim 7 (depends on 1)

The pulley according to claim 1, characterized in that a back surface of each one of said connecting rods, in contact with a section of said rope, has a profile, measured in a plane X-Y perpendicular to said rotation axis, with a circumferentially rounded shape.

### Claim 8 (depends on 1)

The pulley according to claim 1, characterized in that said kinematic chain formed of said peripheral supports is connected by means of cardan joints or equivalent and/or said reciprocal motion is actuated by cams or mechanical actuators, electric or electromagnetic actuators.