EP3761778A1 - Ébrancheur avec bord de coupe supplémentaire - Google Patents

Ébrancheur avec bord de coupe supplémentaire

Info

Publication number
EP3761778A1
EP3761778A1 EP18829298.1A EP18829298A EP3761778A1 EP 3761778 A1 EP3761778 A1 EP 3761778A1 EP 18829298 A EP18829298 A EP 18829298A EP 3761778 A1 EP3761778 A1 EP 3761778A1
Authority
EP
European Patent Office
Prior art keywords
lever
cutting
cutting edge
cutting tool
support surface
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.)
Withdrawn
Application number
EP18829298.1A
Other languages
German (de)
English (en)
Inventor
Peter Kohl
Markus Maag
Fatma ASIK
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.)
Husqvarna AB
Original Assignee
Husqvarna AB
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 Husqvarna AB filed Critical Husqvarna AB
Publication of EP3761778A1 publication Critical patent/EP3761778A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A01G3/0251—Loppers, i.e. branch cutters with two handles

Definitions

  • the present disclosure relates to cutting tools such as loppers. More specifically, the present disclosure relates to a lopper with an additional cutting edge which leads to a convenient implementation of the lopper.
  • Cutting tools such as loppers are used for performing cutting action where substantial heights are involved. Put simply, such tools provide increased reach to a common user to conveniently perform operations such as with branches at quite an elevation.
  • Cutting blades are typically provided in various relative configurations.
  • One of such configurations is a bypass type of configuration.
  • a bypass configuration two cutting blades are provided such that cutting blades are in adjacent parallel planes. The cutting blades, therefore, bypass each other while performing a cutting action and do not intersect each other.
  • This arrangement requires the cutting blades to be pre-tensioned so that the cutting blades do not cut an object placed between the cutting blades unintentionally. Further, the object to be cut may also, sometimes, slip from between the bypass type of cutting blades.
  • Trapping bypass type of configuration is defined as having a combination of two cutting blades which bypass each other, and additionally define boundaries of a space between which the cutting blades accept a material to be cut.
  • the cutting blades may have curved shape of any other such shape which allows defining of boundaries of the cutting space, and provides trapping bypass. Trapping bypass arrangement allows better grip of object to be cut, and does not allow the object to slip from between the cutting blades. However, there is a need for a very large cutting angle, even in case of smaller branches in such a configuration, making it less appealing for users.
  • U.S. Patent 1,520,529 (hereinafter referred to as’529 reference).
  • The’529 reference provides a pruning shears which includes a pair of pivoted blades, one being a cutting blade and the other a holding blade.
  • the cutting blade includes straight cutting edges positioned in offset relation to each other, and the holding blade includes inwardly curved gripping edges positioned in opposed relation.
  • the pruning shears have a combination of a trapping bypass configuration and a bypass configuration.
  • cutting blades in front are provided as having bypass type of configuration, making it necessary to provide pre-tensioning to the cutting blades.
  • the cutting tool includes a first lever having a first end and a second end.
  • the first lever defines a first handle portion towards the first end of the first lever.
  • the cutting tool includes a second lever having a first end and a second end.
  • the second lever defines a second handle portion towards the first end of the second lever.
  • the second lever is pivotally coupled to the first lever at a pivot point.
  • the cutting tool includes a first cutting edge defined by the first lever between the pivot point and the second end of the first lever. The cutting edge has an end point.
  • the cutting tool includes a first support surface defined by the second lever between the pivot point and the second end of the second lever.
  • the first cutting edge and the first support surface define a first gap which accepts a material to be cut between the first cutting edge and the first support surface by moving the first lever and the second lever by a first angle.
  • the first cutting edge and the first support surface are designed such that the first gap starts to close from the end point.
  • the cutting tool includes a second cutting edge defined by the first lever between the end point and a front end of the cutting tool.
  • the cutting tool includes a second support surface defined by the second lever.
  • the second cutting edge and the second support surface define a second gap which accepts a material to be cut between the second cutting edge and the second support surface by moving the first lever and the second lever by a second angle.
  • the second angle is smaller than the first angle.
  • the cutting tool is characterized in that the second support surface is an anvil shear type surface.
  • the anvil shear type second support surface provides support for a material to be cut between the second cutting edge and the second support surface. Further, due to the presence of second set of surfaces, small branches or twigs etc. may be cut easily without fully opening the first lever and the second lever.
  • the second set of surfaces also mark boundaries of a trapping bypass between the first set of surfaces. Conventional bypassing blades generally require certain amount of pre-tensioning to provide reliable cutting action.
  • the cutting tool of the present disclosure with the anvil shear type surface allows ease of cutting compared to the conventional bypassing blades. This can be further supported by comparison between the second angle (i.e. smaller) and the first angle. This leads to multiple benefits such as, but not limited to, low maintenance, ease and economy of manufacture and assembly.
  • the second support surface is removably coupled to the second lever.
  • the removable coupling allows any lopper to have an additional cutting edge leading to more efficient use of the lopper.
  • the second support surface is an integral part of the second lever.
  • Cutting tools which have a provision of multiple cutting edges along with the second support surface allow cutting of smaller branches with lesser effort due to a small cutting angle for the second support surface. Further, this allows cutting of multiple branches using the multiple cutting edges of the cutting tools.
  • the cutting tool can be a lopper.
  • Loppers are used for outdoor applications such as pruning, cutting and the like, particularly while working under conditions requiring extended reach. Further, loppers provide ease of working while ensuring safety for an operator.
  • the first handle and the second handle each has hand grips. Presence of the hand grips not only provides safety of operation but also improves the grip of the cutting tool for the operator.
  • the hand grips can be made of one or more of a material selected from soft polymers, plastics and rubbers.
  • the material for the hand grips can lead to increased life of the cutting tool while protecting the operator from any damage while working.
  • the first lever and the second lever can be made of a metal material such as aluminum, iron etc.
  • the first lever and the second lever may also be made of steel.
  • the first and second levers may be produced by a die casting process.
  • the preference for aluminum would keep the cutting tool lightweight and strong such that it remains relevant for a wide range of applications.
  • the first lever and the second lever can be made of a polymer material such as plastics etc.
  • the first and second lever may be produced by an injection molding process, Injection molding process allows for ease of manufacturing in high volumes as well as provides cost effectiveness as well.
  • FIG. 1 shows a perspective view of a cutting tool, in accordance with an embodiment of the present invention
  • FIG. 2 shows a perspective view of the cutting tool, in accordance with an embodiment of the present invention
  • FIG. 3 shows a perspective view of the cutting tool with a branch engaged with a first support surface, in accordance with an embodiment of the present invention.
  • FIG. 4 shows a perspective view of the cutting tool with a branch engaged with a second support surface, in accordance with an embodiment of the present invention.
  • FIG. 1 illustrates a cutting tool 100 (in a closed configuration.
  • the cutting tool 100 is illustrated as a lopper in the present disclosure, however, it can be any other tool (say shears, pruners, cutters, pliers, scissors etc.), particularly garden tool, as known or used in the art.
  • the present disclosure presents the cutting tool 100 with fixed-length handles, however, in practical application the cutting tool 100 may have extendable handles since the present disclosure is not limited by length of the handle, or the type of the cutting tool 100 itself, in any manner.
  • the cutting tool 100 includes a first lever 110 having a first end 112 and a second end 114.
  • the first lever 110 defines a first handle portion 116 towards the first end 112 of the first lever 110.
  • the cutting tool 100 includes a second lever 120 having a first end 122 and a second end 124.
  • the second lever 120 defines a second handle portion 126 towards the first end 122 of the second lever 120.
  • the second lever 120 is pivotally coupled to the first lever 110 at a pivot point 130.
  • the first lever 110 and the second lever 120 may be pivotally coupled to each other at the pivot point 130 by any suitable joining mechanism as applicable with various aspects of the present disclosure.
  • first lever 110 and the second lever 120 are illustrated as having a solid rod-like structure. However, actual implementation of the cutting tool 100 may have hollow sections for any of the first lever 110 and the second lever 120, or any part of the cutting tool 100 itself, from considerations such as weight, portability, storage among others.
  • first lever 110 and the second lever 120 may be made of aluminum which provides strength while being lightweight in nature. Although any other material may also be used as per the requirements of the application for which the cutting tool 100 is being used.
  • first lever 110 and the second lever 120 as illustrated in the present disclosure is for representative purposes only and a person having ordinary knowledge in the art will appreciate that there would be ergonomic features such as grips, covers, cushioning, thermoplastic attachments and the like, depending upon the type of application, and the present disclosure is not to be limited by any such features in any manner.
  • the first handle portion 116 and the second handle portion 126 each has hand grips (not shown).
  • the role of the hand grips is to provides safety of operation while improving the grip of the cutting tool 100 for the operator.
  • the hand grips may be made of one or more of a material selected from soft polymers, plastics and rubbers.
  • the choice of material for the hand grips shall take into account the type of application such as heavy or light among other factors of the cutting tool 100 as discussed in the present disclosure and as known to a person having ordinary knowledge in the art. Further, there will be provision to replace the hand grips as would be expected due to wear, tear etc. during working life of the cutting tool 100.
  • the first lever 110 and the second lever 120 may be made of a metal material such as aluminum, iron etc.
  • the first lever 110 and the second lever 120 may also be made of steel.
  • the first and second levers 110, 120 may be produced by a die casting process.
  • the preference for aluminum would keep the cutting tool 100 lightweight and strong such that it remains relevant for a wide range of applications.
  • the first lever 110 and the second lever 120 may also be made of a polymer material such as plastics etc.
  • the first and second levers 110, 120 may be produced by an injection molding process, Injection molding process allows for ease of manufacturing in high volumes as well as provides cost effectiveness as well.
  • the cutting tool 100 includes a support surface 150 around a front end 140 of the cutting tool 100.
  • the support surface 150 may be removably coupled to the second lever 120.
  • the removable coupling may allow any cutting tool to be used in implementation of the benefits of the present disclosure. Further, this allows use of the support surface 150 with different cutting tools at disposal of the operator/user.
  • the anvil type support surface 150 can be an integral part of the second lever 120.
  • the anvil type support surface 150 can be integrated with the cutting tool 100 such as welding, bolting, riveting etc. or any other means as used or known in the pertinent art.
  • FIG. 2 illustrates the cutting tool 100 in an open configuration.
  • the cutting tool 100 includes a first cutting edge 202 defined by the first lever 110 between the pivot point 130 and the second end 114 of the first lever 110.
  • the cutting edge has an end point 204.
  • the first cutting edge 202 and a third cutting edge 208 are designed such that a first gap starts to close from the end point 204.
  • the cutting tool 100 includes a second cutting edge 206 defined by the first lever 110 between the end point 204 and the front end 140 of the cutting tool 100.
  • the cutting tool 100 includes the third cutting edge 208 defined by the second lever 120 between the pivot point 130 and the second end of the second lever 120.
  • the first gap between the first cutting edge 202 and the third cutting edge 208 shall generally be employed, only as a preference and not as a restriction, to engage branches of larger dimension since a large cutting angle and/or a large cutting force would be expected to execute cutting through this arrangement of the cutting tool 100.
  • FIG. 3 illustrates the cutting tool 100 with a branch 302 engaged with the third cutting edge208.
  • the first cutting edge 202 and the third cutting edge 208 define the first gap which can accept a material to be cut between the first cutting edge 202 and the third cutting edge 208 by moving the first lever 110 and the second lever 120 by a first angle a.
  • the first angle a may depend on the dimensions, type, or number of the branch 302 to be cut between the first cutting edge 202 and the third cutting edge 208.
  • the first cutting edge 202 may be used as“bypass” with a branch engaged with the third cutting edge 208 while cutting is performed by the second cutting edge 206.
  • the first cutting edge 202 and/or the second cutting edge 206 may be provided with a compound action mechanism which increases the ease of operation by providing more leverage to provide a more powerful force to any cutting edge of the cutting tool 100, particularly for more demanding cutting operations or for inexperienced, or disadvantaged operators/users. Additionally, or alternatively, there may be any other mechanism such as ratchet gear, or any other mechanism as used in the art for the working of the cutting tool 100 as per the type of application.
  • FIG. 4 illustrates the cutting tool 100 with the branch 302 engaged with the support surface 150.
  • the cutting tool 100 includes the support surface 150 defined by the second lever 120 such that the second cutting edge 206 and the support surface 150 define a second gap which can accept a material (i.e. the branch 302) to be cut between the second cutting edge 206 and the support surface 150 by moving the first lever 110 and the second lever 120 by a second angle b.
  • the second angle b is smaller than the first angle a. This reduces the effort for cutting with the support surface 150 and the second cutting edge 206 as compared to the first cutting edge 202 as employed by conventional cutting tools.
  • the support surface 150 is an anvil shear type surface.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Scissors And Nippers (AREA)

Abstract

Cette invention concerne un outil de coupe (100), comprenant un premier levier (110) et un second levier (120). L'outil de coupe (100) comprend un premier bord de coupe (202) défini par le premier levier (110). L'outil de coupe (100) comprend un deuxième bord de coupe (206) défini par le premier levier (110). L'outil de coupe (100) comprend un troisième bord de coupe (208) défini par le second levier (120) de telle sorte que le premier bord de coupe (202) et le troisième bord de coupe (208) reçoivent un matériau à découper en déplaçant le premier levier (110) et le second levier (120) à un premier angle (alpha). L'outil de coupe (100) comprend une surface de support (150) définie par le second levier (120) de telle sorte que le deuxième bord de coupe (206) et la surface de support (150) reçoivent un matériau à couper entre le deuxième bord de coupe (206) et la surface de support (150) à un second angle (bêta), le second angle (bêta) étant inférieur au premier angle (alpha). L'outil de coupe (100) est caractérisé en ce que la surface de support (150) est une surface de type à sécateur à enclume.
EP18829298.1A 2018-03-08 2018-12-17 Ébrancheur avec bord de coupe supplémentaire Withdrawn EP3761778A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018001881 2018-03-08
PCT/EP2018/085225 WO2019170271A1 (fr) 2018-03-08 2018-12-17 Ébrancheur avec bord de coupe supplémentaire

Publications (1)

Publication Number Publication Date
EP3761778A1 true EP3761778A1 (fr) 2021-01-13

Family

ID=64902030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18829298.1A Withdrawn EP3761778A1 (fr) 2018-03-08 2018-12-17 Ébrancheur avec bord de coupe supplémentaire

Country Status (2)

Country Link
EP (1) EP3761778A1 (fr)
WO (1) WO2019170271A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021078383A1 (fr) * 2019-10-23 2021-04-29 Husqvarna Ab Outil de coupe
EP4062746A1 (fr) * 2021-03-22 2022-09-28 Husqvarna AB Outil de coupe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1520529A (en) 1924-12-23 Lopping ob
DE1482264A1 (de) * 1961-02-14 1969-06-04 Bahco Ab Verfahren zum Befestigen langer rohrfoermiger Handgriffschenkel an geschmiedeten Schenkeln von Zangen,Buschscheren u.dgl.
CO6360206A1 (es) * 2010-07-30 2012-01-20 Pontifica Universidad Javerian Herramienta ergonomica para el corte de flores y frutos
US20170055458A1 (en) * 2015-08-28 2017-03-02 Partners In Innovation Limited, Llc Landscaping tool

Also Published As

Publication number Publication date
WO2019170271A1 (fr) 2019-09-12

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