WO2016062340A1 - A portable winch - Google Patents

A portable winch Download PDF

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Publication number
WO2016062340A1
WO2016062340A1 PCT/EP2014/072656 EP2014072656W WO2016062340A1 WO 2016062340 A1 WO2016062340 A1 WO 2016062340A1 EP 2014072656 W EP2014072656 W EP 2014072656W WO 2016062340 A1 WO2016062340 A1 WO 2016062340A1
Authority
WO
WIPO (PCT)
Prior art keywords
winch
line
drum
portable winch
portable
Prior art date
Application number
PCT/EP2014/072656
Other languages
French (fr)
Inventor
Per Olsson
Original Assignee
Per Olsson
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 Per Olsson filed Critical Per Olsson
Priority to PCT/EP2014/072656 priority Critical patent/WO2016062340A1/en
Publication of WO2016062340A1 publication Critical patent/WO2016062340A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/02Manually-operated, e.g. lever-actuated, devices operating on ropes, cables, or chains for hauling in a mainly horizontal direction

Abstract

A portable winch comprising: - a main rod (2); - a rotatable drum (3) arranged at a first end of the main rod; - a releasable reverse rotation stop (6) allowing the drum to rotate in only one direction when unreleased; and - a line attachment portion (5) for attachment of an external line. The line attachment portion is provided at a second end (25) of the main rod, at a distance from the rotatable drum. In a state of use, the portable winch is arranged to engage, with an external line extending from an external fastening point to the drum, at least one turn around the drum, further to an external turning point and back to the line attachment portion, at which the external line is attached.

Description

A PORTABLE WINCH

FIELD OF THE INVENTION

The present invention relates to a portable winch. BACKGROUND OF THE INVENTION

Portable winches are used for winching objects when it is not suitable to use a vehicle that can pull or lift the object, or when such a vehicle is simply not at hand and is not possible to provide. There are many examples of prior art portable winches, such as a disclosed in US 199134. However, such a prior art winch has the drawback of being provided with a pulling cable that is winded about the drum of the winch, and is arranged to be pulled out, attached to the object, and pulled in again when operating the winch. Thereby the winch becomes undesirably heavy, and unflexible as to for instance a limited length of the cable.

SUMMARY OF THE INVENTION

It would be advantageous to provide a portable winch which is useable with different kinds of lines, and which does not collect the line during the winching operation.

To better address this concern, in a first aspect of the invention there presented a portable winch comprising a main rod, a rotatable drum arranged at a first end of the main rod, a releasable reverse rotation stop allowing the drum to rotate in only one direction, and a line attachment portion for attachment of an external line, the line attachment portion being provided at a second end of the main rod, at a distance from the rotatable drum. The portable winch is arranged to engage, in a state of use, with an external line extending from an external fastening point to the drum, at least one turn around the drum, further to an external turning point and back to the line attachment portion, at which the external line is attached. Thereby a portable winch, which does not wind up the line or carries a line of its own on the drum, has been obtained. Additionally, the portable winch is self-tensioning, in that it automatically tensions the line during winching, since the portable winch moves along the line towards the object during winching, while simultaneously pulling the line, due to the attachment to the line attachment portion, away from the turning point. The higher pulling force, the higher tension in the line around the drum, minimizing the risk that the line slips on the drum. It should be noted that the turning point has some kind of low friction member, typically a pulley, around which the line extends. It should also be noted that an object to be winched can include either the fastening point or the turning point, i.e. it does not matter at which end of the line that the object is fastened .

In accordance with an embodiment of the portable winch it further comprises a line guide arranged at the main rod between the rotatable drum and the line attachment portion. The line guide provides a more stable operation of the portable winch.

In accordance with an embodiment of the portable winch the line guide is elongated and groove shaped. This embodiment provides the external line a good guidance along the length of the line guide, while still permitting easy access for the line by receiving it through the mouth of the groove.

In accordance with an embodiment of the portable winch it comprises a support roller arranged between the rotatable drum and the line guide to support the external line at entrance of the winch line guide. Thereby the friction against the line support is reduced.

In accordance with an embodiment of the portable winch it comprises a shield flange arranged at the drum and extending above a part the width and circumference of the drum. The shield flange protects the user and provides an enhanced guidance of the line entering the drum from the object.

In accordance with an embodiment of the portable winch it further comprises a winch lever snap connection for removably connecting a separate winch lever. This is advantageous in order to limit the weight and size of the main part of the winch.

In accordance with an embodiment of the portable winch it further comprising a winch lever for rotating the drum. This is advantageous in that the winch is always complete, in comparison to comprising several separate parts.

In accordance with an embodiment of the portable winch the winch lever is hinged at a drum end thereof, and wherein the winch lever is thereby pivotable between an operation position where it extends at a distance from the main rod, and an idle position where it extends closer to the main rod. Thereby, the winch has been made foldable in order to reduce its size during storage.

In accordance with an embodiment of the portable winch, the winch lever is a ratchet lever.

In accordance with an embodiment of the portable winch the reverse rotation stop has a release portion, by operation of which the reverse rotation stop is released. Thereby the operation of releasing the tension of the line is fast.

In accordance with an embodiment of the portable winch the winch lever is telescopic.

In accordance with an embodiment of the portable winch the portable winch further comprises an electric winch driver. Thereby, no winch lever is needed, and the winching operation is facilitated.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described in more detail and with reference to the appended drawings, in which the same reference numerals refer to like elements throughout, and in which:

Figs. 1 to 3 are schematic perspective views of an embodiment of the portable winch according to the present invention;

Fig. 4 is a schematic perspective view exemplifying the use of the portable winch;

Fig. 5 is an exploded view of an embodiment of the winch;

Fig. 6 is a schematic perspective view of another embodiment of the portable winch according to this invention; and

Fig. 7 is a schematic perspective view of still another embodiment of the portable winch according to this invention. DESCRIPTION OF EMBODIMENTS

In accordance with a first embodiment of the portable winch 1 , it comprises a main rod 2, a rotatable drum 3 arranged at a first end 4 of the main rod 2, a reverse rotation stop 6 allowing the drum 3 to rotate in only one direction, and a line attachment portion 5 for attachment of an external line. However the reverse rotation stop 6 is releasable to allow rotation of the drum 3 in the opposite direction. The line attachment portion 5 is provided at a second end 7 of the main rod 2, at a distance from the rotatable drum 3. This is the basic structure of the portable winch 1 .

The portable winch 1 is arranged to engage, in a state of use, with an external line 8 extending from a fastening point 9 to the drum 3, at least one turn 10 around the drum 3, further to a turning point 1 1 and back to the line attachment portion 5, at which the external line 8 is attached. In this embodiment the line attachment portion 5 simply is a ring. In Fig. 4 the arrangement of the portable winch 1 and the external line 8 is shown with the fastening point 9 at an object 12 to be pulled, and the turning point 1 1 at some fixed structure 13, but the opposite is applicable as well, i.e. the fastening point 9 at the fixed structure 13 and the turning point 1 1 at the object 12. In this example, a first end 15 of the line 8 is fastened at the object 12, and a second, opposite, end 16 of the line 8 is fastened at the line attachment portion 5. Of course, however, it does not necessary have to be the very ends of the line that are fastened, it can be other parts of the line located at a large enough distance from each other. When the portable winch 1 has been arranged in this state of use the object 12 is pulled by operating the drum 3, i.e. by rotating it. As will be described below the rotating of the drum 3 can be done in different ways according to different embodiments of the portable winch.

More particularly, when the portable winch 1 is operated by rotating the drum 3, a pulling force is generated in the part of the line 14 extending from the object 12 to the drum 3. Additionally, since the portable winch 1 is not collecting the line 8 on the drum 3 but merely passing it on, the portable winch 1 can be regarded as moving along the line 8 towards the object 12 and away from the turning point 1 1 . Since the opposite ends 15, 16 of the line 8 are fastened at the object 12 and at the line attachment portion 5, respectively, and since the line 8 extends from the portable winch 1 to the turning point 1 1 and back to the line attachment portion 5, when the portable winch 1 moves away from the turning point 1 1 it pulls the second end 16 away from the turning point 1 1 , and thus pulls the object 12 closer to the turning point 1 1 , which is fixed.

In order to make the line 8 easily, i.e. with low friction, pass the turning point 1 1 a pulley 17 is fastened to the fixed structure 13 at the turning point 1 1 , and the line 8 extends around the pulley 17.

Furthermore, the portable winch 1 comprises a line guide 18 arranged at the main rod 2 between the rotatable drum 3 and the line attachment portion 5. It should be noted that in a simplest possible embodiment the portable winch does not have any line guide, but its operation is considerably stabilized due to the line guide 18. The line guide 18 is elongated and groove shaped. In this embodiment it constitutes a slotted tube, which has a longitudinally extending slot 19 in its wall. In this embodiment, the line guide 18 constitutes a major part of the main rod 2, and also a central part thereof, and it extends tangentially of the drum 3. The mouth 20 of the groove 21 , defining the slot 19, faces to one side of the portable winch 1 , i.e. a plane in which the longitudinal axis of the line guide 18 extends, and which extends through the middle of the slot 19, also extends in parallel with the rotation axis of the drum 3. A first end portion 22 of the rod 2, at its first end 4, is attached to, and can be been made integral with, the line guide 18. The first end portion extends between the line guide 18 and a side plate 23 from which a centre axle 24 for the drum 3 protrudes, see Fig. 5. The drum 3 is mounted on the centre axle 24 and rotates about the centre axle 24. A second end portion 25 of the rod 2, at its second end 7, is attached to and extends between the line guide 18 and the line attachment portion 5. In the state of use, the line 8 extends through the groove, and has been entered into the groove passed the mouth 20. Thus, when the winch 1 is operated, the line 8 slides through the line guide 18. Additionally, the first embodiment, where the line guide 18 is integrated in the rod 2, has a lower weight than some other embodiments that will be described below.

Furthermore, in the first embodiment there is provided a separate winch lever 26, which is removably connectable with a winch lever connection 27, arranged at the opposite side of the drum 3 relative to the side plate 23. Preferably, the winch lever connection 27 is a snap connection, and can for instance include a simple locking pin 28.

According to a second embodiment of the portable winch 30, as shown in Fig. 3, is comprises an integrated winch lever 31 , i.e. the winch lever 31 is permanently attached to the drum 3. Preferably, in this second embodiment, the winch lever 31 is foldable in that it is hinged at a drum end thereof. More particularly, the winch lever 31 has a handle 32 which is connected via a hinge 33 with a head 34. Thereby, the winch lever 31 is pivotable between an operation position where is extends at a distance from the main rod 2, and an idle position where is extends closer to the main rod 2, and abuts on the rod 2 at its free end, as shown with broken lines in Fig. 3. The hinge 33 is provided with a stop to prevent the handle from pivoting further away from the rod 2 than the shown operation position, which could make the portable winch 30 inconvenient to use, and preferably the hinge 33 is also lockable in the operation position. Furthermore, preferably the handle 32 is telescopic.

Except for the winch lever 31 the rest of the portable winch 30 has the same structure as in the first embodiment.

According to a third embodiment of the portable winch 35, as shown in the exploded view in Fig. 5, it comprises a line brake 48 arranged at the line guide 18. The line brake comprises a brake lever 49, which is pivotably attached to a lever support 50 at an opening 51 through the wall of the line guide 18. When operated, i.e. pivoted, the brake lever 49 extends through the opening 51 and engages with the line in a frictional engagement. The line brake 48 thereby prevents the line 8 from loosening after having been tensioned by the winch 35 if the line 8 would slip on the drum 3, or may even manage to brake the line 8 if the reverse rotation stop 6 is released. The line brake 48 is also shown in the second embodiment of the winch 30, although it does not have to be included in that embodiment. According to a fourth embodiment of the portable winch 40, as shown in Fig. 6, it is additionally provided with a line roller 36 arranged at the end of the line guide 18 which is closest to the drum 3. The line roller 36 supports the line 8 at the entrance of the line guide 18 and decreases the friction between the line and the line guide 18.

The portable winch 35 can additionally, or alternatively, be provided with a shield flange 37, which is shown in conjunction with the fourth embodiment for reasons of limiting the number of figures. The shield flange 37 is arranged at the drum 3, and extends above a part of the width and circumference of the drum 3, and more particularly it is attached to the side plate 23, and extends coaxially of the drum 3. Furthermore, as exemplified here, a further line roller 52 is arranged at the shield flange 37 in order to guide the line 8 at its entrance of the portable winch 40, and of the drum 3. The shield flange 37 is provided with a slot 38 for passage of the line 8.

According to a fifth embodiment of the portable winch 55, it has a main rod 41 with a rotatable drum 43 at a first end thereof, and a line attachment portion 42 at a second end thereof. The rotation of the drum 43 is, however, driven by an electric motor 44 arranged on the rod 41 , via a gear 45 arranged at one side of the drum 43. The motor 44 is energized by a rechargeable battery 46, which is also arranged on the rod 41 . A line guide 47 is arranged on the rod 41 as well.

In all embodiments of the portable winch, the drum is preferably provided with transversal grooves 56 and ridges 57 at its surface, which provide a good grip for the line in a peripheral direction while the line slides relatively easy along the grooves, i.e. laterally of the drum 3.

In the exploded view in Fig. 5 there is shown an example of a mechanism for a reverse rotation stop 6, comprising a ratchet 58, a biasing spring 59 biasing the ratchet towards an engagement position, and at least partly wedge shaped stop protrusions 60 arranged at an outside of a side plate 61 of the drum 3. The ratchet 58 and the biasing spring 59 are arranged at the rod 2, where the ratchet 58 is pivoted. In the engagement position, the ratchet 58 engages with one of the stop protrusions 60. By a release portion 62, such as an end portion, of the ratchet 58 it is released and the drum 3 is allowed to rotate reversely. Additionally a drum brake can be provided to have a controlled release of the drum 3, in particular when the line 8 is tensioned, as understood by the person skilled in the art, but it is not shown for reasons of simplicity.

While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments.

For instance, a gear, similar to that of the motorized embodiment, can be provided also for embodiments with a manual winch lever.

Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measured cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1 . A portable winch comprising:
- a main rod (2);
- a rotatable drum (3) arranged at a first end (4) of the main rod;
- a releasable reverse rotation stop (6) allowing the drum to rotate in only one direction when unreleased; and
- a line attachment portion (5) for attachment of an external line (8), the line attachment portion being provided at a second end (25) of the main rod, at a distance from the rotatable drum, wherein the portable winch is arranged to engage, in a state of use, with an external line extending from an external fastening point (9) to the drum, at least one turn around the drum, further to an external turning point (1 1 ) and back to the line attachment portion, at which the external line is attached.
2. The portable winch according to claim 1 , further comprising a line guide (18) arranged at the main rod (2) between the rotatable drum (3) and the winch line attachment portion.
3. The portable winch according to claim 2, wherein the line guide (18) is elongated and groove shaped.
4. The portable winch according to claim 2 or 3, further comprising a support roller (36) arranged between the rotatable drum (3) and the line guide (18) to support the external line (8) at entrance of the line guide.
5. The portable winch according to any one of the previous claims, further comprising a shield flange (37) arranged at the drum (3) and extending above a part of the width and circumference of the drum.
6. The portable winch according to any one of the preceding claims, further comprising a winch lever snap connection (27) for removably connecting a separate winch lever (26).
7. The portable winch according to any one of claims 1 to 5, further comprising a winch lever (31 ) for rotating the drum.
8. The portable winch according to claim 7, wherein the winch lever (31 ) is hinged at a drum end thereof, and wherein the winch lever is thereby pivotable between an operation position where it extends at a distance from the main rod (2), and an idle position where it extends closer to the main rod.
9. The portable winch according to any one of claims 6 to 8, wherein the winch lever (26) is a ratchet lever.
10. The portable winch according to any one of claims 1 to 8, wherein the reverse rotation stop (6) has a release portion (62), by operation of which the reverse rotation stop is released.
1 1 . The portable winch according to any one of claims 6 to 9, wherein the winch lever (31 ) is telescopic.
12. The portable winch according to any one of claims 1 to 6, wherein the portable winch (55) further comprises an electric winch driver (44).
PCT/EP2014/072656 2014-10-22 2014-10-22 A portable winch WO2016062340A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/072656 WO2016062340A1 (en) 2014-10-22 2014-10-22 A portable winch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/072656 WO2016062340A1 (en) 2014-10-22 2014-10-22 A portable winch

Publications (1)

Publication Number Publication Date
WO2016062340A1 true WO2016062340A1 (en) 2016-04-28

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ID=51790690

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/072656 WO2016062340A1 (en) 2014-10-22 2014-10-22 A portable winch

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR497574A (en) * 1918-02-13 1919-12-10 Alfred Arthur Quick A traction or tension
US3677521A (en) * 1970-03-13 1972-07-18 Roger Kinnicutt Jr Self-tailing portable capstan
US4531715A (en) * 1984-06-11 1985-07-30 Wiens Ralph W Winch with storable handle
JPH01101775U (en) * 1987-12-28 1989-07-10
JPH079891U (en) * 1993-07-12 1995-02-10 直光 石塚 Winch
WO2011036520A1 (en) * 2009-09-28 2011-03-31 Harken Italy S.P.A. Rope ascender device and method for use thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR497574A (en) * 1918-02-13 1919-12-10 Alfred Arthur Quick A traction or tension
US3677521A (en) * 1970-03-13 1972-07-18 Roger Kinnicutt Jr Self-tailing portable capstan
US4531715A (en) * 1984-06-11 1985-07-30 Wiens Ralph W Winch with storable handle
JPH01101775U (en) * 1987-12-28 1989-07-10
JPH079891U (en) * 1993-07-12 1995-02-10 直光 石塚 Winch
WO2011036520A1 (en) * 2009-09-28 2011-03-31 Harken Italy S.P.A. Rope ascender device and method for use thereof

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