SIST EN ISO 11680-1:2009
(Main)Machinery for forestry - Safety requirements and testing for pole-mounted powered pruners - Part 1: Units fitted with an integral combustion engine (ISO 11680-1:2000)
Machinery for forestry - Safety requirements and testing for pole-mounted powered pruners - Part 1: Units fitted with an integral combustion engine (ISO 11680-1:2000)
This part of ISO 11680 specifies safety requirements, and the verification of those requirements, for the design, fabrication and use of portable, hand-held, pole-mounted powered pruners, having an integral combustion engine as the power source and using a drive shaft to transmit power to cutting attachments. The cutting attachments covered are saw chains, and reciprocating and circular saw blades. This part of ISO 11680 describes methods for the elimination or reduction of hazards arising from their use. In addition it specifies the type of information on safe working practices to be provided by the manufacturer. It does not cover the risk of electric shock from overhead electric power lines during use of the pruners, with the exception of warnings and advice intended for inclusion in instruction handbooks. A test method and safety requirements addressing this risk are yet to be developed. The list of significant hazards which require action to reduce the risk is given in annex A. Environmental aspects have not been considered. This part of ISO 11680 applies primarily to pruners manufactured after its date of issue.
Forstmaschinen - Sicherheitstechnische Anforderungen und Prüfung für motorbetriebene Hochentaster - Teil 1: Geräte mit integriertem Verbrennungsmotor (ISO 11680-1:2000)
Dieser Teil der ISO 11680 enthält sicherheitstechnische Anforderungen und die Feststellung deren Übereinstimmung
für die Gestaltung und Konstruktion von handgehaltenen Hochentastern (nachfolgend als
„Hochentaster“ bezeichnet) mit integriertem Verbrennungsmotor als Antrieb, die mit einer Antriebswelle zur
Kraftübertragung auf die Schneidgarnitur ausgestattet sind. Die behandelten Schneidgarnituren sind Sägeketten,
scherenartige Schneidvorrichtungen und rotierende Kreissägeblätter.
Dieser Teil der ISO 11680 beschreibt Verfahren für die Beseitigung oder Verringerung von Gefährdungen, die
durch ihren Einsatz entstehen. Außerdem legt er die Art der Informationen für sichere Arbeitsweisen fest, die
vom Hersteller zur Verfügung zu stellen sind. Das Risiko des Kontaktes oder der unmittelbaren Nähe zu
Starkstromleitungen wird abgesehen von Warnhinweisen und Hinweisen in der Betriebsanleitung in dieser
Norm nicht behandelt. Zu diesem Risiko müssen Prüfmethoden und Anforderungen erarbeitet werden.
Die Liste der signifikanten Gefährdungen, die Maßnahmen zur Verminderung des Risikos erfordern, ist in
Anhang A enthalten.
Die Gefährdung der Umwelt wird in dieser Norm nicht in Betracht gezogen.
Dieser Teil der ISO 11680 gilt in erster Linie für Hochentaster, die nach dem Ausgabedatum der Norm
hergestellt worden sind.
Matériel forestier - Exigences de sécurité et essais pour les perches élagueuses à moteur - Partie 1: Machines équipées d'un moteur à combustion interne intégré (ISO 11680-1:2000)
La présente partie de l'ISO 11680 spécifie les exigences de sécurité et les vérifications requises pour la conception et la construction des perches élagueuses à moteur portatives (appelées perches élagueuses dans le texte), tenues à la main, équipées d'un moteur à combustion interne intégré comme source motrice et fonctionnant avec un arbre de transmission pour alimenter le dispositif de coupe. Les dispositifs de coupe couverts sont les chaînes de scies, les lames de scie circulaires et les lames alternatives. La présente partie de l'ISO 11680 décrit les méthodes pour éliminer ou réduire les phénomènes dangereux inhérents à l'utilisation des perches élagueuses. En outre, elle spécifie le type d'informations que le fabricant doit donner sur les pratiques d'utilisation sûre. Elle ne spécifie cependant pas de mesures techniques permettant de réduire les risques liés au contact ou à la proximité de lignes électriques aériennes, en dehors des avertissements et conseils donnés dans la notice d'instructions. Une méthode d'essai et des exigences de sécurité traitant de ce type de risque reste encore à élaborer. La liste des phénomènes dangereux significatifs, nécessitant une action pour réduire le risque, est donnée à l'annexe A. Les aspects liés à l'environnement ne sont pas couverts. La présente partie de l'ISO 11680 s'applique avant tout aux perches élagueuses fabriquées après sa date de publication.
Gozdarski stroji - Zahteve za varnost in preskušanje motornih žag za obvejevanje z drogom - 1. del: Stroji z vgrajenim motorjem z notranjim zgorevanjem (ISO 11680-1:2000)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11680-1:2009
01-maj-2009
1DGRPHãþD
SIST EN ISO 11680-1:2001
SIST EN ISO 11680-1:2001/AC:2004
Gozdarski stroji - Zahteve za varnost in preskušanje motornih žag za obvejevanje z
drogom - 1. del: Stroji z vgrajenim motorjem z notranjim zgorevanjem (ISO 11680-
1:2000)
Machinery for forestry - Safety requirements and testing for pole-mounted powered
pruners - Part 1: Units fitted with an integral combustion engine (ISO 11680-1:2000)
Forstmaschinen - Sicherheitstechnische Anforderungen und Prüfung für motorbetriebene
Hochentaster - Teil 1: Geräte mit integriertem Verbrennungsmotor (ISO 11680-1:2000)
Matériel forestier - Exigences de sécurité et essais pour les perches élagueuses à
moteur - Partie 1: Machines équipées d'un moteur à combustion interne intégré (ISO
11680-1:2000)
Ta slovenski standard je istoveten z: EN ISO 11680-1:2008
ICS:
65.060.80 Gozdarska oprema Forestry equipment
SIST EN ISO 11680-1:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11680-1:2009
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SIST EN ISO 11680-1:2009
EUROPEAN STANDARD
EN ISO 11680-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2008
ICS 65.060.80 Supersedes EN ISO 11680-1:2000
English Version
Machinery for forestry - Safety requirements and testing for pole-
mounted powered pruners - Part 1: Units fitted with an integral
combustion engine (ISO 11680-1:2000)
Matériel forestier - Exigences de sécurité et essais pour les Forstmaschinen - Sicherheitstechnische Anforderungen
perches élagueuses à moteur - Partie 1: Machines und Prüfung für motorbetriebene Hochentaster - Teil 1:
équipées d'un moteur à combustion interne intégré (ISO Geräte mit integriertem Verbrennungsmotor (ISO 11680-
11680-1:2000) 1:2000)
This European Standard was approved by CEN on 15 October 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11680-1:2008: E
worldwide for CEN national Members.
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SIST EN ISO 11680-1:2009
EN ISO 11680-1:2008 (E)
Contents Page
Foreword.3
Annex ZA (Informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC .4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .5
2
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SIST EN ISO 11680-1:2009
EN ISO 11680-1:2008 (E)
Foreword
The text of ISO 11680-1:2000 has been prepared by Technical Committee ISO/TC 23 “Tractors and
machinery for agriculture and forestry” of the International Organization for Standardization (ISO) and has
been taken over as EN ISO 11680-1:2008 by Technical Committee CEN/TC 144 “Tractors and machinery for
agriculture and forestry” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by May 2009, and conflicting national standards shall be withdrawn at the
latest by December 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11680-1:2000.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directives.
For relationship with EC Directives, see informative Annexes ZA and ZB, which are an integral part of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11680-1:2000 has been approved by CEN as a EN ISO 11680-1:2008 without any
modification.
3
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SIST EN ISO 11680-1:2009
EN ISO 11680-1:2008 (E)
Annex ZA
(Informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 98/37/EC on machinery, amended by the New Approach Directive 98/79/EC.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements except Essential Requirement 1.2.7 of that Directive and associated
EFTA regulations.
WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling within the
scope of this standard.
4
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SIST EN ISO 11680-1:2009
EN ISO 11680-1:2008 (E)
Annex ZB
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity
with the relevant Essential Requirements except Essential Requirements 1.2.1 fourth indent and second
paragraph, third indent, 1.7.3 first paragraph, first and second indents, 1.7.4.2 q), t) and u) fourth paragraph
second indent and 2.2.1.1 first paragraph second indent of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.
5
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SIST EN ISO 11680-1:2009
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SIST EN ISO 11680-1:2009
INTERNATIONAL ISO
STANDARD 11680-1
First edition
2000-08-01
Machinery for forestry — Safety
requirements and testing for pole-mounted
powered pruners —
Part 1:
Units fitted with an integral combustion
engine
Matériel forestier — Exigences de sécurité et essais pour les perches
élagueuses à moteur —
Partie 1: Machines équipées d'un moteur à combustion interne intégré
Reference number
ISO 11680-1:2000(E)
©
ISO 2000
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
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ii © ISO 2000 – All rights reserved
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Safety requirements .4
4.1 General.4
4.2 Noise .4
4.3 Vibration .4
4.4 Hand-grips.5
4.5 Engine-starting device .5
4.6 Engine-stopping device .5
4.7 Throttle trigger .6
4.8 Clutch.6
4.9 Harness.6
4.10 Power-driven components.6
4.11 Cutting attachment .6
4.12 Transport guard for cutting attachment.7
4.13 Distance to cutting attachment .7
4.14 Protection against contact with parts under high voltage .7
4.15 Protection against contact with hot parts.7
4.16 Exhaust gases.8
4.17 Tank openings.8
5 Verification of safety requirements.9
6 Information for the operator .10
6.1 General.10
6.2 Technical data.10
6.3 Instruction handbook .11
6.4 Marking .12
Annex A (normative) List of hazards.14
Annex B (normative) Noise test for pole-mounted powered pruners (grade 2 accuracy).17
Annex C (normative) Vibrations test for pole-mounted powered pruners.23
Annex D (normative) Warning symbol for overhead electric-power lines .28
Annex E (informative) Ergonomic design.29
Bibliography.30
© ISO 2000 – All rights reserved iii
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 11680 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 11680-1 was prepared by Technical Committee ISO/TC 23, Tractors and machinery for
agriculture and forestry, Subcommittee SC 17, Manually portable forest machinery.
ISO 11680 consists of the following parts, under the general title Machinery for forestry — Safety requirements and
testing for pole-mounted powered pruners:
� Part 1: Units fitted with an integral combustion engine
� Part 2: Units for use with a back-pack power unit
Annex A to D form a normative part of this part of ISO 11680. Annex E is for information only.
For the purposes of this part of ISO 11680, the CEN annex regarding fulfilment of European Council Directives has
been removed.
iv © ISO 2000 – All rights reserved
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
Introduction
The extent to which hazards are covered is indicated in the scope of this part of ISO 11680. In respect of hazards
not covered by this part of ISO 11680, it is intended that machinery comply as appropriate with ISO/TR 12100.
Certain noise- and vibration-reduction measures are covered in this part of ISO 11680 for the type of machinery
concerned. It is the intention of ISO/TC 23/SC 17 to collect noise and vibration values for each forestry-machine
type in accordance with relevant measurement standards. These values will be used to define the “state of the art”
levels based on principles to be established by SC 17. The interaction of noise and vibration on the machine
characteristics will be assessed, and the relationship between “state of the art” values and exposure limits
considered.
© ISO 2000 – All rights reserved v
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SIST EN ISO 11680-1:2009
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SIST EN ISO 11680-1:2009
INTERNATIONAL STANDARD ISO 11680-1:2000(E)
Machinery for forestry — Safety requirements and testing
for pole-mounted powered pruners —
Part 1:
Units fitted with an integral combustion engine
1 Scope
This part of ISO 11680 specifies safety requirements, and the verification of those requirements, for the design,
fabrication and use of portable, hand-held, pole-mounted powered pruners, having an integral combustion engine
as the power source and using a drive shaft to transmit power to cutting attachments. The cutting attachments
covered are saw chains, and reciprocating and circular saw blades.
This part of ISO 11680 describes methods for the elimination or reduction of hazards arising from their use. In
addition it specifies the type of information on safe working practices to be provided by the manufacturer. It does
not cover the risk of electric shock from overhead electric power lines during use of the pruners, with the exception
of warnings and advice intended for inclusion in instruction handbooks. A test method and safety requirements
addressing this risk are yet to be developed.
The list of significant hazards which require action to reduce the risk is given in annex A.
Environmental aspects have not been considered.
This part of ISO 11680 applies primarily to pruners manufactured after its date of issue.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 11680. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 11680 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 266:1997, Acoustics — Preferred frequencies.
ISO 3744:1994, Acoustics — Determination of sound power levels of noise sources using sound pressure —
Engineering method in an essentially free field over a reflecting plane.
ISO 3767-5:1992, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment —
Symbols for operator controls and other displays — Part 5: Symbols for manual portable forestry machinery.
ISO 6531:1999, Machinery for forestry — Portable hand-held chain-saws — Vocabulary.
ISO 7112:1999, Machinery for forestry — Portable hand-held brush-cutters and grass-trimmers — Vocabulary.
ISO 7113:1999, Portable hand-held forestry machines — Cutting attachments for brush cutters — Single-piece
metal blades.
© ISO 2000 – All rights reserved 1
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
ISO 8662-1:1988, Hand-held portable power tools — Measurement of vibrations at the handle — Part 1: General.
ISO 8893:1997, Forestry machinery — Portable brush cutters and grass-trimmers — Engine performance and fuel
consumption.
ISO 11201:1995, Acoustics — Noise emitted by machinery and equipment — Measurement of emission sound
pressure levels at a work station and at other specified positions — Engineering method in an essentially free field
over a reflecting plane.
ISO 11684:1995, Tractors, machinery for agriculture and forestry, powered lawn and garden equipment — Safety
signs and hazard pictorials — General principles.
ISO/TR 12100-1:1992, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic
1)
terminology, methodology.
ISO/TR 12100-2:1992, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical
2)
principles and specifications.
ISO 13852:1996, Safety of machinery — Safety distances to prevent danger zones being reached by the upper
3)
limbs.
IEC 60651, Sound level meters.
IEC 60804, Integrating-averaging sound level meters.
IEC 60335-1:1991, Safety of household and similar electrical appliances — Part 1: General requirements (third
edition).
IEC 61260:1995, Electroacoustics — Octave-band and fractional-octave-band filters.
3 Terms and definitions
For the purposes of this part of ISO 11680, the following terms and definitions apply.
3.1
pole-mounted powered pruner
pruner
portable, hand-held machine fitted with a cutting attachment mounted on a pole to enable an operator to cut the
branches of standing trees
NOTE See example, Figure 1.
3.2
unit
complete machine including power source, drive shaft, cutting attachment and guard, but excluding harness
3.3
cutting attachment
cutting device in the form of a reciprocating blade, circular saw blade with its retainer, or saw chain with its guide
bar
1) Equivalent to EN 292-1:1991.
2) Equivalent to EN 292-2:1991.
3) Equivalent to EN 294:1992.
2 © ISO 2000 – All rights reserved
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
3.4
handgrip
part of the machine designed to be held by the operator to enable the unit to be manoeuvred
Key
1 Combustion engine
2 Rear hand-grip
3 Harness
4 Front hand-grip
5 Outer shaft tube
6 Cutting attachment
Figure 1 — Pole-mounted powered pruner with integral combustion engine
and saw-chain cutting attachment
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
4 Safety requirements
4.1 General
The safe operation of the pole-mounted powered pruner (hereafter called pruner) depends not only on the following
safety requirements, but also on the safe environment associated with the use of personal-protection equipment
(PPE) such as gloves, slip-resistant footwear, and eye-, ear- and head-protection equipment.
Annex E gives certain ergonomic factors that should be taken in account.
4.2 Noise
4.2.1 Reduction by design and protective measures
The pruner shall be designed to generate a noise level as low as practicable. The main sources of noise from
combustion-engine-driven pruners are the following:
� air intake system,
� engine cooling system,
� engine exhaust system,
� cutting system,
� vibrating surfaces.
[1]
ISO/TR 11688-1 gives general technical information on widely recognized technical rules and means to be
followed in the design of machines with low-noise emission. In the case of combustion-engine driven machines,
special care shall be taken in the design of the exhaust system and selection of the silencer.
[2] [3]
NOTE ISO 11691 and ISO 11820 can be used for the testing of the silencer.
4.2.2 Reduction by information
In addition to technical measures for noise reduction, the instruction handbook accompanying the pruner shall
include:
� recommendation for limiting duration of operation, as appropriate
� warning of noise level with recommendation of the use of ear protection.
4.2.3 Noise measurement
For the measurement of sound power and emission sound pressure at the operator’s position, the methods given
in annex B shall be used.
4.3 Vibration
4.3.1 Reduction by design and protective measures
The pruner shall be designed to generate a vibration level as low as practicable. The main sources of vibration are:
� oscillating forces from the motor
� cutting parts
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
� unbalanced moving parts
� impact in gears, bearings and other mechanisms
� interaction between operator, machine and material being worked.
In addition to measures to reduce vibration at source, technical measures such as isolators and resonating masses
shall be used to isolate, when appropriate, the vibration source from the hand-grip.
NOTE Technical information on widely recognized technical rules and means to be followed in the design of machines for
[4]
low hand-arm vibration solutions is given in a variety of publications such as CEN CR 1030-1:1995 .
4.3.2 Reduction by information
In addition to all possible technical measures for vibration reduction, the instruction handbook shall include a
recommendation for:
� limiting the duration of operation, as appropriate;
� the wearing of PPE such as gloves.
4.3.3 Vibration measurement
For the determination of hand-arm vibration the method given in annex C shall be used.
4.4 Hand-grips
The pruner shall have a hand-grip for each hand. The shape and surface of the hand-grips shall be designed to
provide the necessary sureness of grip: this shall also apply when the operator is wearing gloves. If the hand-grip
nearest the cutting attachment is an integrated part of the shaft tube, its periphery shall be within the diameters of
25 mm min and 50 mm max. The hand-grip length shall be at least 100 mm.
The gripping length of a bail or closed hand-grip shall comprise any length that is straight or curved at a radius
greater than 100 mm together with any blend radius, but not more than 10 mm at either or both ends of the gripping
surface.
NOTE If the shaft tube is used as a hand-grip, the entire shaft tube length can be considered as the grip area. The strength
of the hand-grip is to be considered in a future revision.
4.5 Engine-starting device
The engine shall be provided with an integral starting device. This device can be a self-contained battery electric
starter or a manual starter where the actuator is permanently attached to the pruner. The engine shall not be
provided with a starter operated by means of a loose rope. To activate any electrical starting device two or more
independent motions shall be required.
4.6 Engine-stopping device
The pruner shall have a control for stopping the engine able to be operated with a gloved hand and without
releasing the hold on either of the hand-grips. The engine-stopping device shall not depend on sustained manual
effort for its operation. The stop position shall be clearly marked.
The colour of the control shall be in contrast to its background.
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SIST EN ISO 11680-1:2009
ISO 11680-1:2000(E)
4.7 Throttle trigger
A pruner shall be provided with a throttle trigger that, when released, automatically reverts to the idling position and
is retained in that position by the automatic engagement of a throttle trigger lock-out.
The throttle trigger shall be positioned so that it can be pressed and released with a gloved hand while both hand-
grips are held.
If a throttle lock is provided for cold starting, it shall be self-releasing when the throttle trigger is depressed. In the
starting mode the cutting attachment could be engaged, therefore the throttle lock shall be designed so that t
...
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