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WO1995010719A1 - A rope block - Google Patents

A rope block Download PDF

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Publication number
WO1995010719A1
WO1995010719A1 PCT/DK1993/000328 DK9300328W WO9510719A1 WO 1995010719 A1 WO1995010719 A1 WO 1995010719A1 DK 9300328 W DK9300328 W DK 9300328W WO 9510719 A1 WO9510719 A1 WO 9510719A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling bodies
sheave
block
groove
rope
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DK1993/000328
Other languages
French (fr)
Inventor
Gert Hans Frederiksen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU54618/94A priority Critical patent/AU5461894A/en
Priority to PCT/DK1993/000328 priority patent/WO1995010719A1/en
Publication of WO1995010719A1 publication Critical patent/WO1995010719A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/046—Openable pulley blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/08—Connections of sails to masts, spars, or the like
    • B63H9/10—Running rigging, e.g. reefing equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/49—Bearings with both balls and rollers
    • 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
    • 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
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/18—Means for guiding or supporting belts, ropes, or chains
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/30—Ships, e.g. propelling shafts and bearings therefor

Definitions

  • a rope block especially for use on board sailing boats, comprising a sheave having an outer groove to receive the rope and a housing fixed thereto having a shaft portion, whereon the sheave is rotatably arranged by means of a bearing means, said sheave having lateral wall portions with co-axial, circular grooves being open to the side, and wherein rolling bodies are arranged of such a diameter relative to the depth of the groove that they extend beyond the groove in order to roll on an adjacent track.
  • the object of the invention is to provide a rope block of the above type being more simple and easy to manufacture than hitherto known blocks.
  • the rope block according to the invention is characterised in that at least one of the grooves for the rolling bodies is outwardly defined by an opening having a width being less than the width of the rolling bodies for retaining these in the groove.
  • the rope block may be disassem ⁇ bled and the sheave removed from the housing of the rope block without the rolling bodies falling out of their grooves. Further, a reduction in weight and in the number of parts forming the rope block is obtained by rendering the side plates used on the known rope blocks superfluous. Moreover, as a result hereof, it is possible to increase the width of the bearing face between the sheave and the shaft portion, whereby the surface pressure therebetween may be reduced.
  • the rolling bodies may be balls, which advantageously may be made of plastic.
  • this embodiments has proved particularly advantageous.
  • the housing may be provided with a track for the rolling bodies, extending less than 360° when seen in a circumferential direction, preferably less than 270°, and most preferably less than 180°. Due to the fact that the rolling bodies are continuously retained in their groove, it is not necessary for these to roll continuously on the track of the housing in order to remain in the groove, whereby a saving in weight is obtained, as the housing can be made smaller.
  • the sheave may be provided with an insertion opening for the rolling bodies and a releasable closing means for closing of the insertion opening.
  • This embodiment is particular advantageous when the closing means is accessible from the outside, as the rolling bodies can thereby be replaced merely by removing the releasable closing means without having to disassemble the entire rope block, as is the case with known rope blocks.
  • the opening may be formed of least one lip extending radially inwardly at the outer edge portion of the groove.
  • the lip may be integrally formed with the sheave, whereby the number of parts of the rope block is advantageously reduced.
  • the closing means may be formed of a screw accessible from the outside and screwed into the lateral wall of the sheave, the head thereof closing the insertion opening formed in the lip to prevent the rolling mem ⁇ bers from entering the insertion opening.
  • this embodiment has proved particularly advantageous.
  • the housing may be formed of two identical housing halves, each comprising a shaft half, whereby an advantageous reduction of the number of parts forming the rope block is obtained.
  • the bearing means may be formed of a rolling bearing, the inner track thereof being formed of an outer cylindrical surface on each of the outer surfaces of the two shaft halves, and the outer track thereof being formed of an inner cylindrical surface on the sheave.
  • the rolling bearing may comprise rolling bodies in form of rollers, which advantageously may be made of plastic. In practice, this embodiments has proved particularly advantageous.
  • Fig. 1 is a side view of a rope block according to the invention.
  • Fig. 2 is a sectional view- along the line II-II in Fig. 1,
  • Fig. 3 shows the area III in Fig. 1 on a larger scale
  • Fig. 4 shows the area IV in Fig. 2 on a larger scale.
  • the rope block according to the invention shown in the drawing comprises a sheave 1 rotatably arranged in a block housing 2.
  • the block housing 2 comprises two identical halves 3a, 3b, each provided with a side plate 4a, 4b, having an essentially plane outer surface 5a, 5b.
  • the side plate 4a, 4b On its inner face, the side plate 4a, 4b is provided with a hollow shaft member 6a,6b, extending from the inner surface 7a, 7b of the side plate 4a, 4b.
  • the shaft member 6a, 6b has a oval, inner cavity 8a, 8b and a circular, cylindrical outer surface 9a, 9b, forming a track for the rolling bodies described below.
  • two diametrically opposing areas with large wall thickness are arranged, in which diametrically opposing holes 10a, 11a; 10b, lib are formed.
  • the holes are used for assembling the two housing halves, guide bushes 12, 13 being arranged therein, having internal screw thread 14, 15, intended to receive screws 16 screwed into the bushes from the outer face of the side plate 4a, 4b in question.
  • each side plate has an upper projection 17a, 17b, extending outwardly from the inner face 7a, 7b of the side plate 4a, 4b.
  • two holes 18a, 18b are formed symmetrically relative to the axis 47 of the rope block, guide bushes with internal screw thread being arranged in the holes. Screws 22 are screwed into the thread of the bushes to hold the two housing halves 3a,3b together.
  • Each of the two housing halves comprises two symmetrically arranged, upper openings 23, 24 of an essentially triangular shape and having two symmetrical arranged small, lower openings 53, 54 of an essentially rectangular shape.
  • the upper and lower openings serve to make the rope block lighter.
  • a radial semi-circular opening 25a, 25b is formed, the openings forming a radial bore for receiving the shaft 26 of a swivel part 27 having a transverse hole 28, in which a shackle can be mounted, whereby the block can be attached for instance to a fixed fitting on a sailing boat.
  • the sheave 1 is provided with a circumferential groove 29 in order to receive the rope.
  • the sheave is provided with an inner circular, cylindrical surface 30 forming an outer track for the rolling bodies in form of rollings 31, the inner track thereof being formed of the outer surface 9a, 9b of the shaft members 6a, 6b.
  • the sheave 1 is provided with a circular groove 34, 35 in each side face 32,33.
  • rolling bodies 36 are arranged in form of balls being of a larger diameter than the depth of the grooves 34, 35 so that they extend therebeyond and may roll on a track 37a,37b formed by the inner surface 7a, 7b of the housing halves 3a, 3b.
  • said tracks 37a, 37b only extend essentially 180°, as the lower porion of the housing halves 3a, 3b does not extend to the groove 34,35.
  • the grooves 34, 35 are provided with an outer opening 38 having a width less than that of the rolling bodies, i.e. the diameter of the balls 36, so that they are retained in the grooves 34,35.
  • the outer opening 38 is formed by two opposing lips 39, 40; 41, 42, extending towards one another at the outer edge portion of the groove 34, 35.
  • each groove is provided with an insertion opening 43 formed of an axial bore in the opposing lips 39,40 of the groove 35 and enabling insertion of the balls 36 in the groove.
  • the insertion opening is closed by means of the screw head 44 of a screw 45 screwed into a threaded hole 46 axially formed in the sheave 1 adjacent the groove 35.
  • the block housing and the sheave may advantageously be made of anodized alumi ⁇ nium.
  • the radial or inner rolling bodies (the rollers 31) are advantageously made of plastic, for instance Torlon ® .
  • the axial or outer rolling bodies (the balls 36) are advantageously made of plastic, for instance Delrin ® .
  • the remaining parts of the block, that is the swivel part 27, the guide bushes 12,13,20, and the screws , 22, are advantageously made of stainless steel.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Pulleys (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A rope block, especially for use on board sailing boats, comprising a sheave (1) having an outer groove (29) to receive the rope and a housing (2) fixed relative thereto having a shaft portion (6a, 6b), whereon the sheave (1) is rotatably arranged by means of a bearing means. The sheave (1) has lateral wall portions with co-axial, circular grooves (34, 35) being open to the side, and wherein rolling bodies (36) are arranged. The rolling bodies (36) are of such a diameter relative to the depth of the groove (34, 35) that they extend therebeyond in order to roll on an adjacent track (37a, 37b). At least one of the grooves (34, 35) of the rolling bodies is outwardly defined by an opening (38) having a width less than the width of the rolling bodies (36) for retaining the rolling bodies in the groove (34, 35). As a result, a rope block is obtained which is more simple, lighter and more easy to manufacture than known rope blocks.

Description

A rope block
Technical Field
A rope block, especially for use on board sailing boats, comprising a sheave having an outer groove to receive the rope and a housing fixed thereto having a shaft portion, whereon the sheave is rotatably arranged by means of a bearing means, said sheave having lateral wall portions with co-axial, circular grooves being open to the side, and wherein rolling bodies are arranged of such a diameter relative to the depth of the groove that they extend beyond the groove in order to roll on an adjacent track.
Background Art
Frederiksen Boat Fittings' 1993 main catalogue discloses a rope block of the above type, wherein the rolling bodies in form of balls are retained in their grooves by means of side plates mounted on a fixed hollow shaft, whereon the sheave is rotatably arranged. The hollow shaft, the side plates and the sheave form a unit being detachable from the housing of the rope block. A corresponding rope block is known from US-A-5, 156,378.
Brief Description of the Invention
The object of the invention is to provide a rope block of the above type being more simple and easy to manufacture than hitherto known blocks.
The rope block according to the invention is characterised in that at least one of the grooves for the rolling bodies is outwardly defined by an opening having a width being less than the width of the rolling bodies for retaining these in the groove.
As a result hereof, contrary to known rope blocks, the rope block may be disassem¬ bled and the sheave removed from the housing of the rope block without the rolling bodies falling out of their grooves. Further, a reduction in weight and in the number of parts forming the rope block is obtained by rendering the side plates used on the known rope blocks superfluous. Moreover, as a result hereof, it is possible to increase the width of the bearing face between the sheave and the shaft portion, whereby the surface pressure therebetween may be reduced.
According to the invention, the rolling bodies may be balls, which advantageously may be made of plastic. In practice, this embodiments has proved particularly advantageous.
Furthermore, according to the invention, the housing may be provided with a track for the rolling bodies, extending less than 360° when seen in a circumferential direction, preferably less than 270°, and most preferably less than 180°. Due to the fact that the rolling bodies are continuously retained in their groove, it is not necessary for these to roll continuously on the track of the housing in order to remain in the groove, whereby a saving in weight is obtained, as the housing can be made smaller.
Moreover, according to the invention, the sheave may be provided with an insertion opening for the rolling bodies and a releasable closing means for closing of the insertion opening. This embodiment is particular advantageous when the closing means is accessible from the outside, as the rolling bodies can thereby be replaced merely by removing the releasable closing means without having to disassemble the entire rope block, as is the case with known rope blocks.
Furthermore, according to the invention, the opening may be formed of least one lip extending radially inwardly at the outer edge portion of the groove.
Moreover, according to the invention, the lip may be integrally formed with the sheave, whereby the number of parts of the rope block is advantageously reduced.
Further, according to the invention, the closing means may be formed of a screw accessible from the outside and screwed into the lateral wall of the sheave, the head thereof closing the insertion opening formed in the lip to prevent the rolling mem¬ bers from entering the insertion opening. In practice, this embodiment has proved particularly advantageous.
Moreover, according to the invention, the housing may be formed of two identical housing halves, each comprising a shaft half, whereby an advantageous reduction of the number of parts forming the rope block is obtained.
Furthermore, in the above embodiment, the bearing means may be formed of a rolling bearing, the inner track thereof being formed of an outer cylindrical surface on each of the outer surfaces of the two shaft halves, and the outer track thereof being formed of an inner cylindrical surface on the sheave.
Finally, the rolling bearing may comprise rolling bodies in form of rollers, which advantageously may be made of plastic. In practice, this embodiments has proved particularly advantageous.
Brief Description of the Drawings
The invention is explained in detail below with reference to the drawing, in which
Fig. 1 is a side view of a rope block according to the invention.
Fig. 2 is a sectional view- along the line II-II in Fig. 1,
Fig. 3 shows the area III in Fig. 1 on a larger scale,
Fig. 4 shows the area IV in Fig. 2 on a larger scale.
Best Mode for carrying out the Invention The rope block according to the invention shown in the drawing comprises a sheave 1 rotatably arranged in a block housing 2.
The block housing 2 comprises two identical halves 3a, 3b, each provided with a side plate 4a, 4b, having an essentially plane outer surface 5a, 5b.
On its inner face, the side plate 4a, 4b is provided with a hollow shaft member 6a,6b, extending from the inner surface 7a, 7b of the side plate 4a, 4b. The shaft member 6a, 6b has a oval, inner cavity 8a, 8b and a circular, cylindrical outer surface 9a, 9b, forming a track for the rolling bodies described below. Between the oval cavity 8a, 8b and the circular track 9a, 9b, two diametrically opposing areas with large wall thickness are arranged, in which diametrically opposing holes 10a, 11a; 10b, lib are formed. The holes are used for assembling the two housing halves, guide bushes 12, 13 being arranged therein, having internal screw thread 14, 15, intended to receive screws 16 screwed into the bushes from the outer face of the side plate 4a, 4b in question.
Furthermore, at its upper end each side plate has an upper projection 17a, 17b, extending outwardly from the inner face 7a, 7b of the side plate 4a, 4b. In each projection, two holes 18a, 18b are formed symmetrically relative to the axis 47 of the rope block, guide bushes with internal screw thread being arranged in the holes. Screws 22 are screwed into the thread of the bushes to hold the two housing halves 3a,3b together.
Further, Each of the two housing halves comprises two symmetrically arranged, upper openings 23, 24 of an essentially triangular shape and having two symmetrical arranged small, lower openings 53, 54 of an essentially rectangular shape. The upper and lower openings serve to make the rope block lighter.
Finally, in each of the upper bushes 17a, 17b at the upper end of the block, a radial semi-circular opening 25a, 25b is formed, the openings forming a radial bore for receiving the shaft 26 of a swivel part 27 having a transverse hole 28, in which a shackle can be mounted, whereby the block can be attached for instance to a fixed fitting on a sailing boat.
At its outer periphery, the sheave 1 is provided with a circumferential groove 29 in order to receive the rope. At its inner periphery, the sheave is provided with an inner circular, cylindrical surface 30 forming an outer track for the rolling bodies in form of rollings 31, the inner track thereof being formed of the outer surface 9a, 9b of the shaft members 6a, 6b. Between the inner surface 30 and the groove 29, the sheave 1 is provided with a circular groove 34, 35 in each side face 32,33. In the grooves 34,35, rolling bodies 36 are arranged in form of balls being of a larger diameter than the depth of the grooves 34, 35 so that they extend therebeyond and may roll on a track 37a,37b formed by the inner surface 7a, 7b of the housing halves 3a, 3b. As it most clearly appears from Fig. 1, said tracks 37a, 37b only extend essentially 180°, as the lower porion of the housing halves 3a, 3b does not extend to the groove 34,35.
As it is evident from Fig. 3, the grooves 34, 35 are provided with an outer opening 38 having a width less than that of the rolling bodies, i.e. the diameter of the balls 36, so that they are retained in the grooves 34,35. The outer opening 38 is formed by two opposing lips 39, 40; 41, 42, extending towards one another at the outer edge portion of the groove 34, 35. Moreover, each groove is provided with an insertion opening 43 formed of an axial bore in the opposing lips 39,40 of the groove 35 and enabling insertion of the balls 36 in the groove. In order to prevent the balls from leaving the groove, the insertion opening is closed by means of the screw head 44 of a screw 45 screwed into a threaded hole 46 axially formed in the sheave 1 adjacent the groove 35.
The block housing and the sheave may advantageously be made of anodized alumi¬ nium. The radial or inner rolling bodies (the rollers 31) are advantageously made of plastic, for instance Torlon®. Likewise, the axial or outer rolling bodies (the balls 36) are advantageously made of plastic, for instance Delrin®. The remaining parts of the block, that is the swivel part 27, the guide bushes 12,13,20, and the screws , 22, are advantageously made of stainless steel.

Claims

Claims
1. A rope block, especially for use on board sailing boats, comprising a sheave (1) having an outer groove (29) to receive the rope and a housing (2) fixed relative thereto having a shaft portion (6a, 6b), whereon the sheave (1) is rotatably arranged by means of a bearing means, said sheave (1) having lateral wall portions (32, 33) with co-axial circular grooves (33, 34), being open to the side, and wherein rolling bodies (36) are arranged of such a diameter relative to the depth of the groove (34,35) that they extend beyond the groove in order to roll on an adjacent track (37a, 37b), characterised in that at least one of the grooves (34,35) for the rolling bodies (34, 35) is outwardly defined by an opening (38), having width being less than the width of the rolling bodies (36) for retaining said rolling bodies (36) in the groove (34,35).
2. A block as claimed in claim 1, characterised in that the rolling bodies are balls (36).
3. A block as claimed in claim 1, characterised in that the housing
(2) is provided with a track (37a, 37b) for the rolling bodies, extending less than 360° when seen in a circumferential direction, preferably less than 270°, and most preferably less than 180°.
4. A block according to one or more of the preceding claims, characte- r i s e d in that sheave is provided with an insertion opening (43) for the rolling bodies (36) and a releasable closing means for closing of the insertion opening.
5. A block according to one or more of the preceding claims, characte¬ rised in that the opening (38) is formed of least one lip (39, 40;41,42) extending radially inwardly at the outer edge portion of the groove (34,35).
6. A block as claimed in claim in claim 5, characterised in that the lip (39, 40; 41, 42) is integrally formed with the sheave (1).
7. A block as claimed in claim 4 or 5, characterised in that the closing means is formed of a screw (45) accessible from the outside and screwed into the side wall of the sheave (1), the head (44) closing the insertion opening (43) formed as an opening in the lip (3) to prevent the rolling bodies (36) from entering the insertion opening (43).
8. A block as claimed in claim 1, characterised in that the housing (2) is formed of two identical housing halves (3 a, 3b), each being provided with a shaft half (6a, 6b).
9. A block as claimed in claim 1, characterised in that the bearing means is formed a rolling bearing, the inner track thereof being formed of an outer cylindrical surface (9a, 9b) one each of the two halves (6a,6b) of the shaft, and the outer track thereof being formed of an inner cylindrical surface (30) on the sheave (1).
10. A block as claimed in claim 9, characterised in that the rolling bearing is provided with rolling bodies in form of rollers (31).
PCT/DK1993/000328 1993-10-07 1993-10-07 A rope block Ceased WO1995010719A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU54618/94A AU5461894A (en) 1993-10-07 1993-10-07 A rope block
PCT/DK1993/000328 WO1995010719A1 (en) 1993-10-07 1993-10-07 A rope block

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DK1993/000328 WO1995010719A1 (en) 1993-10-07 1993-10-07 A rope block

Publications (1)

Publication Number Publication Date
WO1995010719A1 true WO1995010719A1 (en) 1995-04-20

Family

ID=8154349

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1993/000328 Ceased WO1995010719A1 (en) 1993-10-07 1993-10-07 A rope block

Country Status (2)

Country Link
AU (1) AU5461894A (en)
WO (1) WO1995010719A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1544153A3 (en) * 2003-12-18 2006-06-07 Demag Cranes & Components GmbH Lower pulley block for hoists with a single pulley
FR2891603A1 (en) * 2005-10-03 2007-04-06 Marin Clausin Sail boat pulley for e.g. circulating rope, has guiding element with revolution shape and with balls placed on its left and right lateral sides, and rollers situated between interior of element and revolution surface of rolling ring
WO2007039684A1 (en) * 2005-10-03 2007-04-12 Marin Clausin Rolling mechanism for supporting very large maximum loads
WO2008011861A1 (en) * 2006-07-27 2008-01-31 Schaeffler Kg Rolling bearing having a rolling-bearing-mounted cage
WO2009036469A2 (en) 2007-09-13 2009-03-19 Harken, Inc. Block with improved central mounting
WO2014065762A1 (en) * 2012-10-26 2014-05-01 Tajfun Planina Proizvodnja Strojev, D.O.O. Portable pulley block
CN103950857A (en) * 2014-04-28 2014-07-30 陈良伟 Combined lifting pulley

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110510451A (en) * 2019-09-03 2019-11-29 同济大学 wide body pulley

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006278A1 (en) * 1988-12-02 1990-06-14 Gert Hans Frederiksen A rope block
EP0510432A1 (en) * 1991-04-25 1992-10-28 Harken Inc. Bearing block having high strength to weight ratio
GB2269794A (en) * 1992-08-20 1994-02-23 Harken Inc Openable snatch block.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990006278A1 (en) * 1988-12-02 1990-06-14 Gert Hans Frederiksen A rope block
EP0510432A1 (en) * 1991-04-25 1992-10-28 Harken Inc. Bearing block having high strength to weight ratio
GB2269794A (en) * 1992-08-20 1994-02-23 Harken Inc Openable snatch block.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1544153A3 (en) * 2003-12-18 2006-06-07 Demag Cranes & Components GmbH Lower pulley block for hoists with a single pulley
FR2891603A1 (en) * 2005-10-03 2007-04-06 Marin Clausin Sail boat pulley for e.g. circulating rope, has guiding element with revolution shape and with balls placed on its left and right lateral sides, and rollers situated between interior of element and revolution surface of rolling ring
WO2007039684A1 (en) * 2005-10-03 2007-04-12 Marin Clausin Rolling mechanism for supporting very large maximum loads
WO2008011861A1 (en) * 2006-07-27 2008-01-31 Schaeffler Kg Rolling bearing having a rolling-bearing-mounted cage
WO2009036469A2 (en) 2007-09-13 2009-03-19 Harken, Inc. Block with improved central mounting
EP2185407A4 (en) * 2007-09-13 2017-01-04 Harken, Inc. Block with improved central mounting
WO2014065762A1 (en) * 2012-10-26 2014-05-01 Tajfun Planina Proizvodnja Strojev, D.O.O. Portable pulley block
CN103950857A (en) * 2014-04-28 2014-07-30 陈良伟 Combined lifting pulley
CN103950857B (en) * 2014-04-28 2016-08-24 陈良伟 A kind of combined type lifting pulley

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