GB2478175A - Pruning hook with toothed engagement - Google Patents

Pruning hook with toothed engagement Download PDF

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Publication number
GB2478175A
GB2478175A GB201019877A GB201019877A GB2478175A GB 2478175 A GB2478175 A GB 2478175A GB 201019877 A GB201019877 A GB 201019877A GB 201019877 A GB201019877 A GB 201019877A GB 2478175 A GB2478175 A GB 2478175A
Authority
GB
United Kingdom
Prior art keywords
arm
hole
mounting seat
driven
driving
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.)
Granted
Application number
GB201019877A
Other versions
GB2478175B (en
GB201019877D0 (en
Inventor
Yao-Chuang Huang
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.)
Ho Cheng Garden Tools Co Ltd
Original Assignee
Ho Cheng Garden Tools Co Ltd
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 Ho Cheng Garden Tools Co Ltd filed Critical Ho Cheng Garden Tools Co Ltd
Priority to GB201019877A priority Critical patent/GB2478175B/en
Publication of GB201019877D0 publication Critical patent/GB201019877D0/en
Priority to FR1153298A priority patent/FR2967549B3/en
Publication of GB2478175A publication Critical patent/GB2478175A/en
Application granted granted Critical
Publication of GB2478175B publication Critical patent/GB2478175B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears
    • A01G3/025—Secateurs; Flower or fruit shears having elongated or extended handles
    • A01G3/0255—Tree pruners, i.e. pruning shears carried at the end of a pole
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears
    • A01G3/025—Secateurs; Flower or fruit shears having elongated or extended handles

Abstract

A pruning hook comprises an extension shank10, a driven arm20pivotally connected with the extension shank, a driving arm30pivotally connected with the extension shank and engaging the driven arm, an operation cord35mounted between the driving arm and the extension shank, an elastic member34biased between the driving arm and the extension shank, and a limit plate40abutting the driving arm and the driven arm to limit the driving arm and the driven arm between the extension shank and the limit plate. The driven arm has an end provided with a toothed rack and the driving arm has a side provided with a toothed driving rack which meshes with the rack of the driven arm. Thus, the driven arm and the driving arm have different pivot centers, and the total arm length of the driven arm and the driving arm has a larger force arm and a larger torque.

Description

* PRUNING HOOK WITH TOOTHED ENGAGEMENT
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a shearing tool and, more particularly, to a pruning hook for a gardening purpose to shear branches or leaves at a higher location.
2. Description of the Related Art
A conventional pruning hook in accordance with the prior art shown in Fig. 7 is used to shear branches of a tree at a higher location and comprises an extension shank 50 having an end portion provided with a mounting seat 51, a driving arm 60 pivotally connected with the mounting seat 51 of the extension shank 50, an operation cord 631 mounted on the driving arm 60, and an elastic member 54 biased between the driving arm 63 and the mounting seat 51 of the extension shank 50. The mounting seat 51 of the extension shank 50 is provided with a fixed blade 53 and a first pivot hole 52. The driving arm 60 has a first end provided with a movable blade 61 and a second pivot hole 62 and a second end provided with a driving portion 63. The second pivot hole 62 of the driving arm 60 is pivotally connected with the first pivot hole 52 of the mounting seat 51. The movable blade 61 of the driving arm 60 is movable relative to the fixed blade 53 of the mounting seat 51 to perform a shearing action. The driving portion 63 of the driving arm 60 is connected with the operation cord 631. Thus, when the operation cord 631 is driven by a user, the driving arm 60 is pivoted about the first pivot hole 52 and the second pivot hole 62 to move the movable blade 61 relative to the fixed blade 53 so as to perform a shearing action. However, the user has to apply a larger force to drive the driving arm 60 so as to perform the shearing action, thereby wasting the user's energy. In addition, a clearance is easily produced between the driving arm 60 and the mounting seat 51 of the extension shank 50 during a long-term utilization so that the movable blade 61 cannot shear the fixed blade 53 closely and exactly.
BRIEF SUMMARY OF THE INVENTION
In accordance with the present invention, there is provided a pruning hook, comprising an extension shank, a driven arm pivotally connected with the extension shank, a driving arm pivotally connected with the extension shank and engaging the driven arm to drive and move the driven arm relative to the extension shank, an operation cord mounted between the driving arm and the extension shank, an elastic member biased between the driving arm and the extension shank, and a limit plate abutting the driving arm and the driven arm to limit the driving arm and the driven arm between the extension shank and the limit plate.
The extension shank has an end portion provided with a mounting seat. The mounting seat of the extension shank is provided with a fixed blade, a main shaft hole and a secondary shaft hole. The driven arm has a first end provided with a rotation hole and a movable blade and a second end provided with a toothed driven rack. The rotation hole of the driven arm is pivotally connected with the main shaft hole of the mounting seat. The movable blade of the driven arm is movable relative to the fixed blade of the mounting seat between a closed position where the movable blade of the driven arm abuts the fixed blade of the mounting seat, and an open position where the movable blade of the driven arm is spaced from the fixed blade of the mounting seat.
The driving arm has a first end provided with a pivot hole and a second end provided with a connecting hole. The pivot hole of the driving arm is pivotally connected with the secondary shaft hole of the mounting seat. The connecting hole of the driving arm is connected with the operation cord. The driving arm has a side provided with a toothed driving rack meshing with the driven rack of the driven arm. The limit plate has a first end provided with a first through hole aligning with the rotation hole of the driven arm and the main shaft hole of the mounting seat and a second end provided with a second through hole aligning with the pivot hole of the driving arm and the secondary shaft hole of the mounting seat.
The primary objective of the present invention is to provide a pruning hook with a toothed engagement to provide an energy-saving effect.
According to the primary advantage of the present invention, the driven arm is pivoted about the main shaft hole of the mounting seat, and the driving arm is pivoted about the secondary shaft hole of the mounting seat, so that the driven arm and the driving arm have different pivot centers, and the total arm length of the driven arm and the driving arm has a larger force arm and a larger torque output so as to achieve an energy-saving effect.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAW[NG(S) Fig. 1 is a perspective view of a pruning hook in accordance with the preferred embodiment of the present invention.
Fig. 2 is an exploded perspective view of the pruning hook as shown inFig. 1.
Fig. 3 is a partially front view of the pruning hook as shown in Fig. 1.
Fig. 4 is a front view of the pruning hook as shown in Fig. 1.
Fig. 5 is a schematic operational view of the pruning hook as shown inFig.4 in use.
Fig. 6 is a schematic operational view of the pruning hook as shown in Fig. 5 in use.
Fig. 7 is an exploded perspective view of a conventional pruning
hook in accordance with the prior art.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings and initially to Figs. 1-3, a pruning hook in accordance with the preferred embodiment of the present invention comprises an extension shank 10, a driven arm 20 pivotally connected with the extension shank 10, a driving arm 30 pivotally connected with the extension shank 10 and engaging the driven arm 20 to drive and move the driven arm 20 relative to the extension shank 10, an operation cord 35 mounted between the driving arm and the extension shank 10, an elastic member 34 biased between the driving arm 30 and the extension shank 10, and a limit plate 40 abutting the driving arm 30 and the driven arm 20 to limit the driving arm 30 and the driven arm 20 between the extension shank 10 and the limit plate 40.
The extension shank 10 has an end portion provided with a mounting seat 11. The mounting seat 11 of the extension shank 10 is provided with a fixed blade 12, a main shaft hole 13 and a secondary shaft hole 14. The mounting seat 11 of the extension shank 10 is further provided with a first fixing hole 15. The mounting seat 11 of the extension shank 10 has a surface provided with a limit knob 16.
The driven arm 20 has a first end provided with a rotation hole 21 and a movable blade 22 and a second end provided with a toothed driven rack 24.
The rotation hole 21 of the driven arm 20 is pivotally connected with the main shaft hole 13 of the mounting seat 11. The movable blade 22 of the driven arm is movable relative to the fixed blade 12 of the mounting seat 11 between a closed position as shown in Fig. 6 where the movable blade 22 of the driven arm 20 abuts the fixed blade 12 of the mounting seat 11, and an open position as shown in Fig. 3 where the movable blade 22 of the driven arm 20 is spaced from the fixed blade 12 of the mounting seat 11. The driven rack 24 of the driven arm 20 has a curved shape and has a radian that is equal to a circumferential projection of the rotation hole 21 so that the driven rack 24 of the driven arm 20 is centered at the rotation hole 21. The driven arm 20 has a mediate section provided with a recessed connecting portion 23 located between the movable blade 22 and the driven rack 24, and the driven rack 24 of the driven arm 20 is angled relative to the connecting portion 23. The movable blade 22 of the driven arm 20 is movable to abut the limit knob 16 of the mounting seat 11 when the movable blade 22 of the driven arm 20 is disposed at the open position thereof, and the connecting portion 23 of the driven arm 20 is movable to abut the limit knob 16 of the mounting seat 11 when the movable blade 22 of the driven arm 20 is disposed at the closed position thereof.
The driving arm 30 and the driven arm 20 are limited between the mounting seat 11 of the extension shank 10 and the limit plate 40. The driving arm 30 has a first end provided with a pivot hole 31 and a second end provided with a connecting hole 33. The pivot hole 31 of the driving arm 30 is pivotally connected with the secondary shaft hole 14 of the mounting seat 11. The connecting hole 33 of the driving arm 30 is connected with the operation cord 35. The driving arm 30 has a side provided with a toothed driving rack 36 meshing with the driven rack 24 of the driven arm 20. The driving rack 36 of the driving arm 30 is located between the pivot hole 31 and the connecting hole 33. The driving rack 36 of the driving arm 30 has a curved shape and has a radian that is equal to a circumferential projection of the pivot hole 31 so that the driving rack 36 of the driving arm 30 is centered at the pivot hole 31. The driving arm 30 has a mediate section provided with a second fixing hole 32 which is located between the pivot hole 31 and the connecting hole 33. The pivot hole 31, the second fixing hole 32 and the connecting hole 33 of the driving arm 30 are arranged to have a triangular shape.
The elastic member 34 is a tensile spring and has two hook portions 341 formed on two opposite ends thereof The two hook portions 341 of the elastic member 34 are hooked onto the first fixing hole 15 of the mounting seat 11 and the second fixing hole 32 of the driving arm 30 respectively to drive and move the movable blade 22 of the driven arm 20 relative to the fixed blade 12 of the mounting seat 11 to the closed position thereof.
The pruning hook further comprises a fixed pulley 351 pivotally connected with the connecting hole 33 of the driving arm 30, and a guide roller 352 rotatably mounted on the extension shank 10.
The operation cord 35 is extended through the fixed pulley 351 and the guide roller 352 to drive and move the movable blade 22 of the driven arm relative to the fixed blade 12 of the mounting seat 11 to the open position thereof.
The limit plate 40 has a first end provided with a first through hole 41 aligning with the rotation hole 21 of the driven arm 20 and the main shaft hole 13 of the mounting seat 11 and a second end provided with a second through hole 42 aligning with the pivot hole 31 of the driving arm 30 and the secondary shaft hole 14 of the mounting seat 11.
The pruning hook further comprises a first fastening bolt "A" in turn extending through the first through hole 41 of the limit plate 40, the rotation hole 21 of the driven arm 20 and the main shaft hole 13 of the mounting seat 11, a first fastening nut "B" screwed onto the first fastening bolt "A", a second fastening bolt "C" in turn extending through the second through hole 42 of the limit plate 40, the pivot hole 31 of the driving arm 30 and the secondary shaft hole 14 of the mounting seat 11, and a second fastening nut "D" screwed onto the second fastening bolt "C".
In operation, referring to Figs. 3-6 with reference to Figs. 1 and 2, when the operation cord 35 is pulled downward, the fixed pulley 351 is moved downward to move the connecting hole 33 of the driving arm 30 downward so that the driving arm 30 is pivoted downward about the pivot hole 31 of the driving arm 30 and the secondary shaft hole 14 of the mounting seat 11. In such a manner, the driving rack 36 of the driving arm 30 is moved to drive the driven rack 24 of the driven arm 20 so that the driven arm 20 is pivoted downward about the rotation hole 21 of the driven arm 20 and the main shaft hole 13 of the mounting seat 11, and the movable blade 22 of the driven arm 20 is moved relative to the fixed blade 12 of the mounting seat ii to the closed position as shown in Fig. 6 so as to perform a cutting action. At this time, the elastic member 34 is expanded by the pulling force.
On the contrary, when the pulling force applied on the operation cord disappears, the second fixing hole 32 of the driving arm 30 is moved upward by the restoring force of the elastic member 34 so that the driving arm is pivoted upward about the pivot hole 31 of the driving arm 30 and the secondary shaft hole 14 of the mounting seat 11. In such a manner, the driving rack 36 of the driving arm 30 is moved to drive the driven rack 24 of the driven arm 20 so that the driven arm 20 is pivoted upward about the rotation hole 21 of the driven arm 20 and the main shaft hole 13 of the mounting seat 11, and the movable blade 22 of the driven arm 20 is moved relative to the fixed blade 12 of the mounting seat 11 to the open position as shown in Figs. 3 and 4.
Referring to Figs. 4-6 with reference to Figs. 1-3, the driven rack 24 of the driven arm 20 has a free end provided with a first toothed portion 241, and the driving rack 36 of the driving arm 30 has a free end provided with a second toothed portion 361. A first extension line "Li" is defined and extended through the first toothed portion 241 of the driven rack 24 and the main shaft hole 13 of the mounting seat 11, a second extension line "L2" is defined and extended through the second toothed portion 361 of the driving rack 36 and the main shaft hole 13 of the mounting seat 11, and a third extension line "L3" is defined and extended through the connecting hole 33 of the driving arm 30 and the main shaft hole 13 of the mounting seat 11. In addition, a first angle "Ri" is defined between the first extension line "Ll" and the third extension line "L3", and a second angle "R2" is defined between the third extension line "L3" and the second extension line "L2".
As shown in Fig. 4, the first angle "Ri" is equal to the second angle "R2" when the movable blade 22 of the driven arm 20 and the fixed blade 12 of the mounting seat 11 are disposed at the open position. In the preferred embodiment of the present invention, each of the first angle "Ri" and the second angle "R2" is ranged between ten to twenty degrees (10-20°).
As shown in Fig. 5, the first angle "Ri" is gradually greater than the second angle "R2" when the movable blade 22 of the driven arm 20 and the fixed blade 12 of the mounting seat 11 are disposed between the open position and the closed position.
As shown in Fig. 6, the first angle "Ri" is much greater than the second angle "R2" when the movable blade 22 of the driven arm 20 and the fixed blade 12 of the mounting seat ii are disposed at the closed position. In the preferred embodiment of the present invention, the first angle "Ri" is ranged between twenty to forty degrees (20-40°), and the second angle "R2" is smaller than ten degrees (10°).
Accordingly, the driven arm 20 is pivoted about the main shaft hole 13 of the mounting seat ii, and the driving arm 30 is pivoted about the secondary shaft hole 14 of the mounting seat 11, so that the driven arm 20 and the driving arm 30 have different pivot centers, and the total arm length of the driven arm 20 and the driving arm 30 has a larger force arm and a larger torque output so as to achieve an energy-saving effect. In addition, the driving rack 36 of the driving arm 30 meshes with the driven rack 24 of the driven arm 20 so that the driving arm 30 and the driven arm 20 are connected exactly to perform the cutting action smoothly and stably. Further, the driving arm 30 and the driven arm 20 are limited between the mounting seat 11 of the extension shank and the limit plate 40 so that the driving arm 30 and the driven arm 20 are pivoted exactly and smoothly.
Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims (8)

  1. CLAIMS1. A pruning hook, comprising: an extension shank; a driven arm pivotally connected with the extension shank; a driving arm pivotally connected with the extension shank and engaging the driven arm to drive and move the driven arm relative to the extension shank; an operation cord mounted between the driving arm and the extension shank; an elastic member biased between the driving arm and the extension shank; and a limit plate abutting the driving arm and the driven arm to limit the driving arm and the driven arm between the extension shank and the limit plate; wherein the extension shank has an end portion provided with a mounting seat; the mounting seat of the extension shank is provided with a fixed blade, a main shaft hole and a secondaiy shaft hole; the driven arm has a first end provided with a rotation hole and a movable blade and a second end provided with a toothed driven rack; the rotation hole of the driven arm is pivotally connected with the main shaft hole of the mounting seat; the movable blade of the driven arm is movable relative to the fixed blade of the mounting seat between a closed position where the movable blade of the driven arm abuts the fixed blade of the mounting seat, and an open position where the movable blade of the driven arm is spaced from the fixed blade of the mounting seat; the driving arm has a first end provided with a pivot hole and a second end provided with a connecting hole; the pivot hole of the driving arm is pivotally connected with the secondary shaft hole of the mounting seat; the connecting hole of the driving arm is connected with the operation cord; the driving arm has a side provided with a toothed driving rack meshing with the driven rack of the driven arm; the limit plate has a first end provided with a first through hole aligning with the rotation hole of the driven arm and the main shaft hole of the mounting seat and a second end provided with a second through hole aligning with the pivot hole of the driving arm and the secondary shaft hole of the mounting seat.
  2. 2. The pruning hook of claim 1, wherein the driven rack of the driven arm has a free end provided with a first toothed portion; the driving rack of the driving arm has a free end provided with a second toothed portion; a first extension line is defined and extended through the first toothed portion of the driven rack and the main shaft hole of the mounting seat; a second extension line is defined and extended through the second toothed portion of the driving rack and the main shaft hole of the mounting seat; a third extension line is defined and extended through the connecting hole of the driving arm and the main shaft hole of the mounting seat; a first angle is defined between the first extension line and the third extension line; a second angle is defined between the third extension line and the second extension line; when the movable blade of the driven arm and the fixed blade of the mounting seat are disposed at the open position, the first angle is equal to the second angle, and each of the first angle and the second angle is ranged between ten to twenty degrees (1O2O0); when the movable blade of the driven arm and the fixed blade of the mounting seat are disposed at the closed position, the first angle is greater than the second angle, the first angle is ranged between twenty to forty degrees (20-40°), and the second angle is smaller than ten degrees (100).
  3. 3. The pruning hook of claim 1, wherein the pruning hook further comprises: a first fastening bolt in turn extending through the first through hole of the limit plate, the rotation hole of the driven arm and the main shaft hole of the mounting seat; a first fastening nut screwed onto the first fastening bolt; a second fastening bolt in turn extending through the second through hole of the limit plate, the pivot hole of the driving arm and the secondary shaft hole of the mounting seat; a second fastening nut screwed onto the second fastening bolt.
  4. 4. The pruning hook of claim 1, wherein the driven rack of the driven arm has a curved shape and has a radian that is equal to a circumferential projection of the rotation hole so that the driven rack of the driven arm is centered at the rotation hole; the driving arm and the driven arm are limited between the mounting seat of the extension shank and the limit plate; the driving rack of the driving arm is located between the pivot hole and the connecting hole; the driving rack of the driving arm has a curved shape and has a radian that is equal to a circumferential projection of the pivot hole so that the driving rack of the driving arm is centered at the pivot hole; the pivot hole, the second fixing hole and the connecting hole of the driving arm are arranged to have a triangular shape.
  5. 5. The pruning hook of claim 1, wherein the mounting seat of the extension shank is further provided with a first fixing hole; the driving arm has a mediate section provided with a second fixing hole which is located between the pivot hole and the connecting hole; the elastic member is a tensile spring and has two hook portions formed on two opposite ends thereof the two hook portions of the elastic member are hooked onto the first fixing hole of the mounting seat and the second fixing hole of the driving arm respectively to drive and move the movable blade of the driven arm relative to the fixed blade of the mounting seat to the closed position thereof
  6. 6. The pruning hook of claim 1, wherein the pruning hook further comprises: a fixed pulley pivotally connected with the connecting hole of the driving arm; a guide roller rotatably mounted on the extension shank; the operation cord is extended through the fixed pulley and the guide roller to drive and move the movable blade of the driven arm relative to the fixed blade of the mounting seat to the open position thereof.
  7. 7. The pruning hook of claim 1, wherein the mounting seat of the extension shank has a surface provided with a limit knob; the driven arm has a mediate section provided with a recessed connecting portion located between The movable blade and the driven rack; the driven rack of the driven arm is angled relative to the connecting portion; the movable blade of the driven arm is movable to abut the limit knob of the mounting seat when the movable blade of the driven arm is disposed at the open position thereof; the connecting portion of the driven arm is movable to abut the limit knob of the mounting seat when the movable blade of the driven arm is disposed at the closed position thereof.
  8. 8. A pruning hook substantially as hereinbefore described with reference to and as shown in Figures 1 -6 of the accompanying drawings.
GB201019877A 2010-11-24 2010-11-24 Pruning hook with toothed engagement Active GB2478175B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB201019877A GB2478175B (en) 2010-11-24 2010-11-24 Pruning hook with toothed engagement
FR1153298A FR2967549B3 (en) 2010-11-24 2011-04-15 EBRANCHOIR A COMMITMENT TO TEETH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201019877A GB2478175B (en) 2010-11-24 2010-11-24 Pruning hook with toothed engagement

Publications (3)

Publication Number Publication Date
GB201019877D0 GB201019877D0 (en) 2011-01-05
GB2478175A true GB2478175A (en) 2011-08-31
GB2478175B GB2478175B (en) 2012-08-01

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ID=43467192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB201019877A Active GB2478175B (en) 2010-11-24 2010-11-24 Pruning hook with toothed engagement

Country Status (2)

Country Link
FR (1) FR2967549B3 (en)
GB (1) GB2478175B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2499407A (en) * 2012-02-15 2013-08-21 Ho Cheng Garden Tools Co Ltd Shears with toothed engagement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040045175A1 (en) * 2002-09-05 2004-03-11 Ming-Shan Jang Tree pruner
US20080052916A1 (en) * 2006-09-06 2008-03-06 Thomas Lin Tree pruner
GB2447303A (en) * 2007-05-10 2008-09-10 Ho Cheng Garden Tools Co Ltd Gardening shears having energy saving function
DE202009014849U1 (en) * 2009-12-14 2010-04-08 Ho Cheng Garden Tools Co., Ltd., Fu Shing Energy saving pruning shears

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040045175A1 (en) * 2002-09-05 2004-03-11 Ming-Shan Jang Tree pruner
US20080052916A1 (en) * 2006-09-06 2008-03-06 Thomas Lin Tree pruner
GB2447303A (en) * 2007-05-10 2008-09-10 Ho Cheng Garden Tools Co Ltd Gardening shears having energy saving function
DE202009014849U1 (en) * 2009-12-14 2010-04-08 Ho Cheng Garden Tools Co., Ltd., Fu Shing Energy saving pruning shears

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2499407A (en) * 2012-02-15 2013-08-21 Ho Cheng Garden Tools Co Ltd Shears with toothed engagement

Also Published As

Publication number Publication date
FR2967549B3 (en) 2012-11-30
FR2967549A3 (en) 2012-05-25
GB2478175B (en) 2012-08-01
GB201019877D0 (en) 2011-01-05

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