GB2122470A - Improvements in harvesting and pruning knives - Google Patents

Improvements in harvesting and pruning knives Download PDF

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Publication number
GB2122470A
GB2122470A GB08214508A GB8214508A GB2122470A GB 2122470 A GB2122470 A GB 2122470A GB 08214508 A GB08214508 A GB 08214508A GB 8214508 A GB8214508 A GB 8214508A GB 2122470 A GB2122470 A GB 2122470A
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GB
United Kingdom
Prior art keywords
knife
harvesting
assemblies
hydraulic ram
assembly
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
GB08214508A
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GB2122470B (en
Inventor
Chek Kwai Wong
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 GB08214508A priority Critical patent/GB2122470B/en
Publication of GB2122470A publication Critical patent/GB2122470A/en
Application granted granted Critical
Publication of GB2122470B publication Critical patent/GB2122470B/en
Priority to MY8700338A priority patent/MY8700338A/en
Expired legal-status Critical Current

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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
    • A01G3/08—Other tools for pruning, branching or delimbing standing trees
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D46/00—Picking of fruits, vegetables, hops, or the like; Devices for shaking trees or shrubs
    • A01D46/24—Devices for picking apples or like fruit
    • A01D46/253—Portable motorised fruit pickers

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Harvester Elements (AREA)

Abstract

A harvesting knife (10) has a first blade (11) secured to a blade holder (13) fixed for movement with a cylinder (16) of a hydraulic ram. To piston (30) of the hydraulic is secured a second blade assembly (20) and extension of the hydraulic ram urges together the first blade (11) and the second knife assembly (20) to perform a cutting operation. A spring (31) separates the blades when a cutting operation is complete. <IMAGE>

Description

SPECIFICATION Improvements in harvesting and pruning knives The invention relates to harvesting knives.
According to the invention there is provided a harvesting knife comprising first and second mutually facing knife assemblies, arranged for sliding move mentthe one relative to the other, and power means for causing the knife assemblies to perform a cutting stroke by moving the knife assemblies between a first position in which the knife assemblies are spaced apart and a second position in which the two knife assemblies engage the one with the other.
Means are preferably provided for biasing the knife assemblies towards the first position. The biasing means may comprise a spring.
Thefirst knife assembly may comprise a knife having an inwardly curved cutting edge.
The second knife assembly may comprise a pair of parallel blades each having a generally outwardly curved working edge. The working edge of each blade ofthe second knife assembly may be serrated and may comprise a plurality of spikes extending towards the first knife assembly.
The knife assemblies are preferably slidable linearly the one relative to the other.
The power means preferably comprise a hydraulic ram, one portion ofthe hydraulic ram being secured to thefirstknife assembly and a second part of the hydraulic ram being secured to the second knife assembly, the arrangement being such that extension of the hydraulic ram urgestogetherthetwo knife assemblies.
The hydraulic ram is preferably adapted to be attached to rotary power means, for example a hand rotary hydraulic engine.
By way of example, one embodiment of the harvesting knife according to the invention will now be described with reference to the accompanying drawings, in which: Fig. is is a sideview of a harvesting knife; Fig. 2 is a perspective view of the harvesting knife of Fig 1; and Fig. 3 is an exploded view offirst and second knife assemblies ofthe harvesting knife.
A harvesting knife generally indicated at 10 has a first knife blade 11 of steel having a knife edge 12 generally inwardly curved. The blade 11 is secured to a steel blade holder 13, the blade holder 13 in turn being secured bynutand bolt assemblies 14to a plate 15 attached to a cylinder 16 of a hydraulic ram.
Asecond knife assembly 20 has a pair of parallel, spaced apart, serrated blades 21,22 of steel. Between the blades 21 and 22 are arranged a steel spacer 23: and guide bars 24 and 25. The second knife assembly is held together by nuts 26 and bolts 27.
The guide bars 24 and 25 provide a guide slot 28 through which the blade holder 13 slides.
The spacer 23 is secured by welding or other suitable means to a piston 30 ofthe hydraulic ram.
Figs. 1 and 2 show the harvesting knife 10 in a first position in which the two blade assemblies are spaced apart ready to receive an article, such as a palm to be harvested, between the two knife assemblies. A tension spring 31 attached at one end to a bolt 27 ofthe second knife assernbly and at the other wend to a mounting 32 on the plate 15 to which the blade holder 13forthefirst knife 11 is attached.
When hydraulic fluid is introduced into the hydraulic ram, the piston 30 is urged out of the cylinder 16, thereby urging the second knife assembly 20 towards the knife edge 12 of the first knife 11. In addition to serrations, the blades 21 and 22 have spikes 35 which bite into material ofthe article to be cut, thereby achieving a grip on the article.The ram continues to extend until the blade 11 passes between the two blades 21 and 22, at which point hydraulic pressure in the cylinder 16 is released through an outlet valve 40.
Atthis point, the spring 31 returns the blades 21 and 22 to the position shown in Figs. 1 and 2.
Hydraulic fluid under pressure forthe hydraulic ram may conveniently be provided by attaching the ram to a hand rotaryhydraulic engine (notshown), a typical engine size being 24 c.c. The end of the ram is attached to the hydraulicfluid under pressure is introduced into the cylinder 16 of the ram.
It will be appreciated that while the term "harvesting knife" has been used throughout this specification, the knives according tothe invention could be used for other purposes, such as pruning.
1. A harvesting knife comprising first and second mutuallyfacing knife assemblies arranged for sliding movementthe one relative to the other, and power meansforcausingthe knife assemblies to perform a cutting stroke by moving the knife assemblies between a first position in which the knife assemblies are spaced apart and a second position in which the two knife assemblies engage the one with the other.
2. A harvesting knife as claimed in claim 1 comprising means for biasing the knife assemblies towardsthefirst position.
3. A harvesting knife as claimed in claim 2 wherein the biasing means comprise a spring.
4. A harvesting knife as claimed in any preceding claim wherein the first knife assembly comprises a knife having an inwardly curved cutting edge.
5. Aharvesting knife as claimed in any preceding claim wherein the second knife assembly comprises a pair of parallel blades each having a generally outwardly curved working edge.
6. A harvesting knife as claimed in claim 5 wherein the working edge of each blade of the second knife assembly is serrated.
7. A harvesting knife as claimed in claim 5 or claim 6 wherein the working edge of each blade of the second knife assembly comprises a plurality of spikes extending towards the first knife assembly.
8. A harvesting knife as claimed in any preceding claim wherein the knife assemblies are slidable linearlytheone relative to the other.
9. A harvesting knife as claimed in any preceding claim wherein the power means comprises a hyd The drawing(s) originally filed was/were informal and the print here reproduced is taken from a later filed formal copy.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in harvesting and pruning knives The invention relates to harvesting knives. According to the invention there is provided a harvesting knife comprising first and second mutually facing knife assemblies, arranged for sliding move mentthe one relative to the other, and power means for causing the knife assemblies to perform a cutting stroke by moving the knife assemblies between a first position in which the knife assemblies are spaced apart and a second position in which the two knife assemblies engage the one with the other. Means are preferably provided for biasing the knife assemblies towards the first position. The biasing means may comprise a spring. Thefirst knife assembly may comprise a knife having an inwardly curved cutting edge. The second knife assembly may comprise a pair of parallel blades each having a generally outwardly curved working edge. The working edge of each blade ofthe second knife assembly may be serrated and may comprise a plurality of spikes extending towards the first knife assembly. The knife assemblies are preferably slidable linearly the one relative to the other. The power means preferably comprise a hydraulic ram, one portion ofthe hydraulic ram being secured to thefirstknife assembly and a second part of the hydraulic ram being secured to the second knife assembly, the arrangement being such that extension of the hydraulic ram urgestogetherthetwo knife assemblies. The hydraulic ram is preferably adapted to be attached to rotary power means, for example a hand rotary hydraulic engine. By way of example, one embodiment of the harvesting knife according to the invention will now be described with reference to the accompanying drawings, in which: Fig. is is a sideview of a harvesting knife; Fig. 2 is a perspective view of the harvesting knife of Fig 1; and Fig. 3 is an exploded view offirst and second knife assemblies ofthe harvesting knife. A harvesting knife generally indicated at 10 has a first knife blade 11 of steel having a knife edge 12 generally inwardly curved. The blade 11 is secured to a steel blade holder 13, the blade holder 13 in turn being secured bynutand bolt assemblies 14to a plate 15 attached to a cylinder 16 of a hydraulic ram. Asecond knife assembly 20 has a pair of parallel, spaced apart, serrated blades 21,22 of steel. Between the blades 21 and 22 are arranged a steel spacer 23: and guide bars 24 and 25. The second knife assembly is held together by nuts 26 and bolts 27. The guide bars 24 and 25 provide a guide slot 28 through which the blade holder 13 slides. The spacer 23 is secured by welding or other suitable means to a piston 30 ofthe hydraulic ram. Figs. 1 and 2 show the harvesting knife 10 in a first position in which the two blade assemblies are spaced apart ready to receive an article, such as a palm to be harvested, between the two knife assemblies. A tension spring 31 attached at one end to a bolt 27 ofthe second knife assernbly and at the other wend to a mounting 32 on the plate 15 to which the blade holder 13forthefirst knife 11 is attached. When hydraulic fluid is introduced into the hydraulic ram, the piston 30 is urged out of the cylinder 16, thereby urging the second knife assembly 20 towards the knife edge 12 of the first knife 11. In addition to serrations, the blades 21 and 22 have spikes 35 which bite into material ofthe article to be cut, thereby achieving a grip on the article.The ram continues to extend until the blade 11 passes between the two blades 21 and 22, at which point hydraulic pressure in the cylinder 16 is released through an outlet valve 40. Atthis point, the spring 31 returns the blades 21 and 22 to the position shown in Figs. 1 and 2. Hydraulic fluid under pressure forthe hydraulic ram may conveniently be provided by attaching the ram to a hand rotaryhydraulic engine (notshown), a typical engine size being 24 c.c. The end of the ram is attached to the hydraulicfluid under pressure is introduced into the cylinder 16 of the ram. It will be appreciated that while the term "harvesting knife" has been used throughout this specification, the knives according tothe invention could be used for other purposes, such as pruning. CLAIMS
1. A harvesting knife comprising first and second mutuallyfacing knife assemblies arranged for sliding movementthe one relative to the other, and power meansforcausingthe knife assemblies to perform a cutting stroke by moving the knife assemblies between a first position in which the knife assemblies are spaced apart and a second position in which the two knife assemblies engage the one with the other.
2. A harvesting knife as claimed in claim 1 comprising means for biasing the knife assemblies towardsthefirst position.
3. A harvesting knife as claimed in claim 2 wherein the biasing means comprise a spring.
4. A harvesting knife as claimed in any preceding claim wherein the first knife assembly comprises a knife having an inwardly curved cutting edge.
5. Aharvesting knife as claimed in any preceding claim wherein the second knife assembly comprises a pair of parallel blades each having a generally outwardly curved working edge.
6. A harvesting knife as claimed in claim 5 wherein the working edge of each blade of the second knife assembly is serrated.
7. A harvesting knife as claimed in claim 5 or claim 6 wherein the working edge of each blade of the second knife assembly comprises a plurality of spikes extending towards the first knife assembly.
8. A harvesting knife as claimed in any preceding claim wherein the knife assemblies are slidable linearlytheone relative to the other.
9. A harvesting knife as claimed in any preceding claim wherein the power means comprises a hyd The drawing(s) originally filed was/were informal and the print here reproduced is taken from a later filed formal copy.
raulic ram, one portion ofthe hydraulic ram being secured to the first knife assembly and a second portion of the hydraulic ram being secured to the second knife assembly, the arrangement being such that extension ofthe hydraulic ram urges together the two knife assemblies.
10. A harvesting knife as claimed in claim 9 wherein the hydraulic ram is adapted to be attached to rotary power means.
11. A harvesting knife as claimed in claim 10 wherein the hydraulic ram is adapted to be attached to a hand rotary hydraulic engine.
12. A harvesting knife substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB08214508A 1982-05-18 1982-05-18 Improvements in harvesting and pruning knives Expired GB2122470B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB08214508A GB2122470B (en) 1982-05-18 1982-05-18 Improvements in harvesting and pruning knives
MY8700338A MY8700338A (en) 1982-05-18 1987-12-30 Improvements in harvesting and pruning knives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08214508A GB2122470B (en) 1982-05-18 1982-05-18 Improvements in harvesting and pruning knives

Publications (2)

Publication Number Publication Date
GB2122470A true GB2122470A (en) 1984-01-18
GB2122470B GB2122470B (en) 1986-04-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08214508A Expired GB2122470B (en) 1982-05-18 1982-05-18 Improvements in harvesting and pruning knives

Country Status (2)

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GB (1) GB2122470B (en)
MY (1) MY8700338A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741962A1 (en) * 1995-05-11 1996-11-13 Netanya Istam Ltd. Fruit picking apparatus
GB2305881A (en) * 1995-10-05 1997-04-23 William George Lyne Sliding knife pruner
CN105532185A (en) * 2016-03-18 2016-05-04 温州职业技术学院 Multifunctional high-altitude fruit picking equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104396419A (en) * 2014-11-21 2015-03-11 广西大学 Manual rice cutter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1099948A (en) * 1965-08-27 1968-01-17 New Draulics Inc Hydraulically operated pruner
GB1196795A (en) * 1966-07-20 1970-07-01 H P Burman Ltd A Branch Cutter.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1099948A (en) * 1965-08-27 1968-01-17 New Draulics Inc Hydraulically operated pruner
GB1196795A (en) * 1966-07-20 1970-07-01 H P Burman Ltd A Branch Cutter.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741962A1 (en) * 1995-05-11 1996-11-13 Netanya Istam Ltd. Fruit picking apparatus
GB2305881A (en) * 1995-10-05 1997-04-23 William George Lyne Sliding knife pruner
CN105532185A (en) * 2016-03-18 2016-05-04 温州职业技术学院 Multifunctional high-altitude fruit picking equipment

Also Published As

Publication number Publication date
GB2122470B (en) 1986-04-16
MY8700338A (en) 1987-12-31

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Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920518