US3805706A - Pulley device adapted for use in a ski tow installation - Google Patents

Pulley device adapted for use in a ski tow installation Download PDF

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Publication number
US3805706A
US3805706A US00207762A US20776271A US3805706A US 3805706 A US3805706 A US 3805706A US 00207762 A US00207762 A US 00207762A US 20776271 A US20776271 A US 20776271A US 3805706 A US3805706 A US 3805706A
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United States
Prior art keywords
pulley
flange
pulley device
roller
groove
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Expired - Lifetime
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US00207762A
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English (en)
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G Bancel
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B61B12/06—Safety devices or measures against cable fracture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • F16H55/50—Features essential to rope pulleys

Definitions

  • ABSTRACT A pulley device adapted for use in a ski tow installation.
  • the device comprises a pulle ported on an axle adapted to be in pole, a web and a grooved rim cable for pulling the loads throu tow bars.
  • An annular flan side of the groove and is [30] Foreign Application Priority Data Dec. 21, 1970 France y having a hub supounted on a support 52 us. 104/197, 74/2303, 74/2305, the 74/23013, 104/173 ST ghihe mtermedlary Of [51] Int. B6lb 7/10, B61b ll/OO ge 1s provided on at least one 58 Field of Search..........
  • rollers 104/173 ST, 182, 197; mounted 1 295/9 R; 74/2303, 2305 23011, 23013 web by means of rollers supported on roller bearings 1 forming a circular rolling path.
  • Each of the rollers has [56] References Cited a groloveflfor receiying the roundedhinner edge of the annu ar ange.
  • T e periphery of t e flange includes UNITED STATES PATENTS teeth forming cut-outs for receiving the bars. 347,443 8/1886 Roe et al.
  • the invention relates to a pulley device comprising a pulley mounted for rotation about its hub and having a grooved rim for receiving a cable adapted to pull a load, in particular a ski tow cable, at least one side extending the groove per se and mounted for rotation with respect thereto.
  • a tow cable passes most often at the upper part of a pulley, sometimes at the lower part, according to the grade of the terrain and the height above the ground of the support poles carrying pulleys. It is not unusual for a cable to come off a guiding pulley, owing to changes in the load suspended from the cable, for example in the case of a ski tow, on the sudden departurefrom a seat during the run, or because of forces exerted on the cable due, for example, to sudden changes in climatic conditions such as gusts of wing or the like.
  • An object of the invention is to provide an improved pulley device which completely eliminates such occurrences, which is of a simple construction, inexpensive, and capable of being constructed by modifying existing pulleys without it being necessary for the rest of the installation to undergo any transformation, namely the support poles.
  • a still further object of the invention is to provide such an improved pulley device which is free of risk and which is therefore not a new source of accidents.
  • the pulley device comprises means angularly distributed about the drum of the pulley for forming a circular path of travel in the rim of generally annular shape having an outer periphery with a cut out adapted to receive an arm or the like by means of which the cable exerts its driving action on the load.
  • FIG. 1 is a diagrammatic showing of the general organization of a cable guiding device for pulling loads
  • FIG. 2 is a side elevation view of a pulley device according to the invention in a first embodiment
  • FIG. 3 is a view similar to that of FIG. 2 for another embodiment
  • FIG. 4 is a front elevation view of a pulley device according to the invention
  • FIG. 5 is a view in section taken along line 55 of FIG. 4 on a larger scale
  • FIG. 6 is a front elevation view of a pulley adapted to be provided with means according to the invention
  • FIG. 7 is a partial view in section of a pulley according to FIG. 6 provided with means according to the invention
  • FIG. 8 is schematic detail of another embodiment of the improved pulley according to the invention
  • FIG. 9 is a partial view of the periphery of a rim for a pulley device according to the invention.
  • a cable 10 of a cable guiding device adapted to pull loads, for example ski tows, the cable 10 passage in a known way over pulleys 11,, 1 1 etc., placed at the top of support poles 12,, 12 etc., erected at intermediary or high points of the terrain and possibly on pulleys 13 13 etc., carried by support poles 14 14 etc., erected at low points the bars or cross members 15 by which skiers are pulled are fixed to the cable 10 driven by a motor (not shown) usually in a releasable manner by sleeves 16.
  • loads for example ski tows
  • a pulley shown is FIGS. 2 and 3 at is mounted for rotation about an axle 21 carried by a bracket 22 on a support pole 12 or 14, and the pulley has a groove 23 for receiving the cable and comprises, for example, a
  • a torus-shaped member 31 forms the grooved rim of the pulley and is advantageously secured by welding to the gusset plates 32 and 33 placed on each side of the plane of symmetry 34 of the pulley and connected by arms 35 to the hub 36.
  • At least one flange 40 of generally annular shape is mounted for rotation relative to the pulley 20 its inner edge 42 cooperating with guiding and centering devices fixed for rotation with the central web and advanta geously comprising rollers mounted on roller bearings.
  • the flange 40 comprises a planar annular portion 41 with a rounded inner edge followed by a portion 43 extending radially outward and inclined relative to the portion 41 and on which are provided teeth 41,, 41 etc., defining spaces therebetween for receiving the bent ends of the bars 15.
  • the pitch of the teeth is chosen to ensure a height such as to avoid sudden disengagement of the cable, even where the cable is subject to forces with a large lateral component.
  • each one of the teeth 41 has an outer edge with an inwardly curved portion 44 (FIGS. 5 and 9).
  • a fillet 60 extending substantially along the entire base of the tooth and in the vicinity of the junction of the portions 41' and 43 of the flange such that the fillet is disposed above the ends 61 of the groove 23 of the pulley when the flange is mounted thereon.
  • Reinforcing ribs (FIGS. 4, 5 and 7) are secured on the outer surface of the flange for resisting deformation of the flange.
  • FIGS. 4-7 provides as centering and guiding devices in rotation with respect to the pulley per se, rollers 50 rotatably mounted on roller bearings 67.
  • Each roller comprises a sleeve 51 with a flange 52 at one end and in which is formed a groove, preferably V-shaped with walls 53 and 54, in which the inner edge 42 of the flange 40 is received.
  • the rounded inner edge 42 of the flange and the V-shaped groove assure a contact of the cooperating surfaces of the flange and the roller along a line which favors reliable operation even with unfinished molded or cast flanges.
  • a sleeve 63 is inserted in each of the two gusset plates and fixed therein, for example by welding thereto at 64 or the sleeves 63 are fixed to the gusset plates such as 26 (FIGS. 4 and without extending into the same.
  • Each one of the sleeves then receives a roller bearing device comprising a pin 65 having a head 72 at its end 66 for supporting a roller 67 surrounded by a metal ribbon 73 and a threaded end 68 adapted to cooperate with a nut 69 with the interpositioning of a washer 70.
  • a keeper pin 71 prevents the unloosening of the nut 69.
  • a washer 75 which forms a slight gap 76 with the roller 50.
  • a flange 40 is mounted on the rollers with its inner edge 42 received in the V-shaped groove therein.
  • a roller 50 not mounted on a bearing, is positioned facing the third point and on the inside of the flange until the axis of the roller is substantially aligned with the axis of the hole in the gusset plate 26.
  • a roller bearing device is then inserted which is different from the two devices previously put into place in that the pin 91 of the fixed support 66 for the rollers 67 is eccentric relativeto the axis 92 of the rod 65 introduced into the sleeve 63 previously fixed to the web of the pulley per se.
  • a displacement of the roller 50 is brought about until line contact of the rounded edge 42 of the flange with the sides of the grooves 53 and 54 of the V- shaped groove in the roller is established.
  • the gap 76 formed between the washer 75 and the opposing surface of the sleeve 51 enables a slight displacement of the roller 50 relative to the sleeve 63 associated therewith, allowing a certain amount of pivoting of the flange with respect to the pulley without disturbing the operating conditions.
  • FIG. 2 shows an improved device according to the invention comprising a flange 40 and an identical flange 400 on the respective sides of the groove 23, the bracket 22 carrying a conventional cable guide 81 by means of an upright 80.
  • flange 40 is mounted on the web of the pulley 20 per se.
  • the groove 23 of the pulley extends onto the opposite surface supporting the flange 40 by a truncated conical flange having a periphery 82 withough cut outs.
  • the cable 10 may tend to be displaced with an upward movement on the inner surface of the teeth 41 relative to the pulley.
  • the rolling path of the flange instead of being constituted by rollers having a V-shaped grooves comprises rollers 83 having rectangular-shaped grooves which receive an enlarged edge 84 of flange 85.
  • the shape of the edge of the flange and the groove of the rollers provides linear contact along the cooperating surfaces permitting a slight displacement of the flange relative to the rollers favorable to reliable operation of the device.
  • the means according to the invention comprising the rolling path ensures that even in the case of accidential loosening of one of the nuts of the securing means for the roller hearings on the web, the flange will remain fixed to the pulley.
  • a pulley device comprising a pulley including a hub, an annular rim provided with a groove adapted to receive a cable for pulling loads by means of bars, gusset plates secured to said rim and extending inwardly therefrom towards the hub, means secured to the gusset plates for defining a circular rolling and guiding path, at least one annular flange having cut-outs in the periphery thereof, said flange having one lateral face extending adjacent said rim in confronting relation to said groove and extending in continuity thereof, said flange being rotatably mounted on said circular guiding and rolling path, whereby said cut-outs allow the passage of said bars, and means connecting said plates to said hub.
  • a pulley device according to claim 1, wherein the means defining the circular rolling and guiding path comprises roller bearings secured to said gusset plates, rollers'rotatably mounted on said roller bearings, each of said rollers having a groove receiving the inner edge of said flange.
  • a pulley device as claimed in claim 2 comprising sleeves fixed to said gusset plates and receiving said roller bearings.
  • a pulley device according to claim 2, wherein the inner edge of the annular flange is rounded.
  • a pulley device comprising sleeves fixed to said gusset plates and receiving said roller bearings, a washer mounted on the roller bearing between the roller and the sleeve, a slight play being provided between the washer and the surface of the roller facing the washer.
  • a pulley device comprising eccentric means supporting at least one of said rollers in adjustable position from said gusset plates.
  • a pulley device wherein the groove in each roller is bounded by opposed surfaces, the surface most distant from the gusset plates having an outer edge of a diameter larger than that of the opposite surface so that removal of the flange is prevented after the flange is mounted onto the pulley.
  • a pulley device defines teeth between the cut-outs, said teeth including inwardly curved portions at the outer edges thereof, and ribs extending substantially the entire length of the teeth at the base thereof, said ribs being located on the inner face of the flange facing said rim, said rib being adjacent the outer edge of the groove of the pulley.
  • a pulley device according to claim 1, further comprising guiding means for said bars in the vicinity of the pulley.
  • a pulley device wherein two of said annular flanges are provided disposed respectively on opposite sides of said rim.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Pulleys (AREA)
  • Electric Cable Installation (AREA)
US00207762A 1970-12-21 1971-12-14 Pulley device adapted for use in a ski tow installation Expired - Lifetime US3805706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7045974A FR2119109A5 (fr) 1970-12-21 1970-12-21

Publications (1)

Publication Number Publication Date
US3805706A true US3805706A (en) 1974-04-23

Family

ID=9066109

Family Applications (1)

Application Number Title Priority Date Filing Date
US00207762A Expired - Lifetime US3805706A (en) 1970-12-21 1971-12-14 Pulley device adapted for use in a ski tow installation

Country Status (8)

Country Link
US (1) US3805706A (fr)
JP (1) JPS5242510Y2 (fr)
AT (1) AT319330B (fr)
CA (1) CA936385A (fr)
CH (1) CH548304A (fr)
DE (1) DE2160163B2 (fr)
FR (1) FR2119109A5 (fr)
IT (1) IT944037B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669619A (en) * 1983-03-25 1987-06-02 Sonnig, S.A. Device and method for transporting a load by cable
US8555299B2 (en) * 2011-06-23 2013-10-08 Philips & Lite-On Digital Solutions Corporation Optical disc drive and tray driving device thereof
US20220323850A1 (en) * 2021-04-13 2022-10-13 Robert BUTTON Portable line ascending device for sliding or roller sports
GB2611543A (en) * 2021-10-06 2023-04-12 Mindling Design Ltd Sheave assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US347443A (en) * 1886-08-17 peaece eoe and peteb boe bedlington
US1063522A (en) * 1913-01-04 1913-06-03 Bion Bradford Farnham Ball-bearing flanged trolley-wheel.
US1369839A (en) * 1920-03-27 1921-03-01 Joseph St Guido Reynolds Tait Flanged wheel
US1577260A (en) * 1925-06-27 1926-03-16 James M Jones Car wheel
US3339497A (en) * 1964-04-06 1967-09-05 Bancel Guy Henri Ski-lift pulley arrangements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US347443A (en) * 1886-08-17 peaece eoe and peteb boe bedlington
US1063522A (en) * 1913-01-04 1913-06-03 Bion Bradford Farnham Ball-bearing flanged trolley-wheel.
US1369839A (en) * 1920-03-27 1921-03-01 Joseph St Guido Reynolds Tait Flanged wheel
US1577260A (en) * 1925-06-27 1926-03-16 James M Jones Car wheel
US3339497A (en) * 1964-04-06 1967-09-05 Bancel Guy Henri Ski-lift pulley arrangements

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669619A (en) * 1983-03-25 1987-06-02 Sonnig, S.A. Device and method for transporting a load by cable
US8555299B2 (en) * 2011-06-23 2013-10-08 Philips & Lite-On Digital Solutions Corporation Optical disc drive and tray driving device thereof
US20220323850A1 (en) * 2021-04-13 2022-10-13 Robert BUTTON Portable line ascending device for sliding or roller sports
GB2611543A (en) * 2021-10-06 2023-04-12 Mindling Design Ltd Sheave assembly

Also Published As

Publication number Publication date
AT319330B (de) 1974-12-10
JPS51117955U (fr) 1976-09-24
IT944037B (it) 1973-04-20
DE2160163B2 (de) 1978-07-27
CH548304A (fr) 1974-04-30
FR2119109A5 (fr) 1972-08-04
JPS5242510Y2 (fr) 1977-09-27
DE2160163C3 (fr) 1979-04-12
DE2160163A1 (de) 1972-07-13
CA936385A (en) 1973-11-06

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