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WO1995008256A1 - Dispositif de coupe de vegetation actionne par batterie et procede d'utilisation - Google Patents

Dispositif de coupe de vegetation actionne par batterie et procede d'utilisation Download PDF

Info

Publication number
WO1995008256A1
WO1995008256A1 PCT/US1994/009431 US9409431W WO9508256A1 WO 1995008256 A1 WO1995008256 A1 WO 1995008256A1 US 9409431 W US9409431 W US 9409431W WO 9508256 A1 WO9508256 A1 WO 9508256A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
motor
cutting
recharger
lawn
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.)
Ceased
Application number
PCT/US1994/009431
Other languages
English (en)
Inventor
& Stratton Corporation Briggs
John E. Feldner
Patrick J. Bruener
Paul A. Tharman
Richard J. Frangesch
Robert K. Mitchell
Richard A. Dykstra
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.)
Briggs and Stratton Corp
Original Assignee
Briggs and Stratton Corp
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 Briggs and Stratton Corp filed Critical Briggs and Stratton Corp
Priority to AU76008/94A priority Critical patent/AU7600894A/en
Priority to CA002195995A priority patent/CA2195995C/fr
Priority to JP8508036A priority patent/JP2837960B2/ja
Priority to AU20953/95A priority patent/AU684928B2/en
Priority to BR9508744A priority patent/BR9508744A/pt
Priority to EP95913566A priority patent/EP0777410A2/fr
Priority to PCT/US1995/002765 priority patent/WO1996005719A2/fr
Publication of WO1995008256A1 publication Critical patent/WO1995008256A1/fr
Anticipated expiration legal-status Critical
Priority to AU56423/98A priority patent/AU695414B2/en
Priority to AU56424/98A priority patent/AU701777B2/en
Priority to AU56425/98A priority patent/AU5642598A/en
Priority to AU56422/98A priority patent/AU5642298A/en
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
    • A01D69/02—Driving mechanisms or parts thereof for harvesters or mowers electric
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/76—Driving mechanisms for the cutters
    • A01D34/78—Driving mechanisms for the cutters electric

Definitions

  • This invention relates to electric vegetation cutting systems. More particularly, this invention relates to battery-powered electric grass cutting apparatus having removable, rechargeable batteries and a rotating cutting device.
  • Electric lawnmowers which operate on AC line current. These lawnmowers typically have a plug attached to the handle that is suitable for connection with an AC power cord.
  • a primary disadvantage of such prior art lawnmowers is that the cord is unwieldy and cumbersome, requiring the operator to constantly manipulate or move the cord to keep it out of the way of the cutting blade. Also, the cord may be cut by the rotating cutting blade, leading to a short circuit or worse.
  • cordless battery-electric lawnmowers are known.
  • Such lawnmowers typically have one or more large rechargeable batteries disposed on the mower deck with the electric motor.
  • the batteries are typically recharged by connecting a battery charger to the lawnmower.
  • a major disadvantage of such prior art "cordless electric” lawnmowers is that they are difficult to maneuver and push due to the weight of the batteries.
  • the batteries must typically be very large for the lawnmower to run a sufficient length of time to mow the average size lawn.
  • the batteries will operate the lawnmower from 30 to 90 minutes before the batteries have to be recharged.
  • a typical lawnmower generally weighs about 55 to 80 pounds.
  • Such lawnmowers are difficult to maneuver and to push uphill. Such lawnmowers may be impossible to use by weaker people.
  • a vegetation cutting system uses a cutting apparatus having an electric motor, at least one removable, rechargeable battery adapted to being connected in circuit with the electric motor, a deck means for supporting the electric motor, a plurality of wheels interconnected with the support means to allow the mower to be moved, a handle interconnected with the support means, and a rotary cutting means, such as a cutting blade, interconnected with a rotatable motor shaft of the motor.
  • the vegetation cutting system also includes a means for recharging the battery, which may be disposed on the cutting apparatus or provided as a separate unit.
  • the cutting system may also include a control circuit that controls the current supplied by the battery to the motor to conserve the output of the battery in response to variations in cutting conditions.
  • the cutting apparatus includes a retaining means, such as a housing, having an attachment means to which said battery is attached, or having an opening therein into which the battery is placed. Both the battery and the retaining means have quick disconnect terminals to allow the battery to be quickly attached or inserted into the housing opening, and quickly removed and replaced.
  • the battery has a handle, preferably connected to its upper portion, so that the battery may be readily lifted out of, or otherwise detached from, the retaining means.
  • the battery recharging means may be connected to the battery via a plug in the battery, or the battery may be lifted from the lawnmower and either connected to the recharging means or placed in a receptacle opening within the battery recharging means.
  • the battery recharging means may include one or more receptacle openings, each of the openings being adapted to receive a battery.
  • An alarm circuit may be provided on the battery that emits an alarm signal when the voltage of the battery falls below a predetermined level.
  • the present invention also comprises a unique method of cutting vegetation, such as a lawn or the like, with a battery-powered cutting apparatus.
  • the cutting apparatus is operated using a first removable, rechargeable battery until the first battery is discharged to a selected level.
  • the first battery is then electrically disconnected from the electric motor of the cutting apparatus and removed, and the cutting apparatus continues to operate to cut the vegetation using a second battery as a power source.
  • the first battery may remain in place for recharging, or it may be removed and placed into or connected to a separate recharging unit.
  • the first battery is removed and replaced by a second battery which has been fully charged by the battery recharger.
  • the second battery is electrically disconnected from the electric motor.
  • the second battery is preferably disconnected by removing it and replacing it with either the recharged first battery or with a third battery, which is then electrically connected to the electric motor.
  • the discharged second battery is then electrically connected with the recharger by either attaching the discharged second battery to the recharger or by placing the discharged second battery within an opening in the recharger housing. The operation of the cutting apparatus is then continued, using either the recharged first battery or the third battery.
  • the cutting apparatus may be substantially continuously operated for an extended period of time to cut almost any sized lawn. At the same time, the weight and size of the cutting apparatus is reduced since the cutting apparatus only carries with it a single battery at a time.
  • the cutting apparatus may be continuously operated for twice as long, even without recharging.
  • the recharger is a so-called "quick charge" recharger that recharges a battery to 80% of its maximum level within a short period of time. Using this embodiment, almost all lawns may be cut using such a recharger and two or three batteries - only one of which need be disposed on the cutting apparatus at any given time.
  • a second battery could optionally be carried on the cutting apparatus to be used when the first battery becomes discharged.
  • Fig. 1 is a perspective view of the vegetation cutting system according to the present invention.
  • Fig. 2 is a side view, shown in partial section, of the cutting system's power unit.
  • Fig. 3 is a top view of the power unit, depicted from line 3-3 of Fig. 2.
  • Fig. 4 is a side view, shown in partial section, of the battery recharger depicted in Fig. 1.
  • Fig. 5 is a cross-sectional view of the battery charger, taken along line 5-5 of Fig. 4.
  • Fig. 6 is a side view of the battery recharger, shown in partial section, depicting one of the batteries being removed.
  • Fig. 7 is a schematic diagram of the battery recharger circuit.
  • Fig. 8 is a side view, shown in partial section, of the female portion of a quick disconnect battery terminal.
  • Fig. 1 is a perspective view depicting the major components of the vegetation cutting system.
  • the system depicted in Fig. 1 preferably includes a battery-powered lawnmower 10, and either a trickle battery recharger 12 or a stand-alone battery recharger 14.
  • Lawnmower 10 includes a deck 16 that provides support to a power unit consisting of an electric motor 18, a control circuit 20 (Fig. 2), an optional battery recharger circuit 22 (Fig. 2), a removable, rechargeable battery 24, and a housing 26 which retains battery 24 in a substantially fixed position.
  • Battery recharger circuit 22 is not used if trickle recharger 12 is used.
  • Housing 26 includes side walls 30 and a top wall 32.
  • the battery retaining means could comprise a frame that, along with the quick disconnect electrical terminals discussed below, acts as a retainer member to hold battery 24 in place.
  • the retaining means could comprise one or more mechanical connectors that keep the battery in a substantially fixed position.
  • the retaining means could also consist of the electrical terminals alone.
  • lawnmower 10 may include a chute 34 for discharging cut grass, although other devices may be used for mulching or bagging the grass.
  • Deck 16 is supported by rotatable wheels 36 that are connected therewith, which allow the lawnmower 10 to be moved from one place to another.
  • bale lever 40 also known as a "deadman switch”. Bale 40 must be held in the engaged position to operate the lawnmower.
  • bale 40 Interconnected with bale 40 is a Bowden wire assembly 42 that includes an outer casing 44 and an inner wire 46. The release of bale lever 40 causes wire 46 to move, thereby activating an ignition cut-off switch 48 as a safety feature. When switch 48 is activated, power to motor 18 is interrupted, thereby slowing the rotation of a rotating cutting blade 50 (Fig. 2) .
  • removable battery 24 includes a handle 52 attached to its upper end. After battery 52 has been discharged to a predetermined level, the battery may be removed from housing 26 as depicted in Fig. 2, and thereafter placed in one of two openings 54 in the upper end of battery recharger 14. Other means could be used to retain battery 24 in recharger 14, such as a frame structure, one or more mechanical connectors, or the electrical connectors alone. Battery recharger 14 is connected to a source of AC line current via cord 56.
  • battery 24 may also include an optional alarm circuit 100.
  • Alarm 100 is preferably an audible alarm that sounds when battery 24 has been discharged below a predetermined, safe level. Such an alarm is desirable when the vegetation cutting system is used, for example, in climates having a long winter during which the lawnmower is placed in storage, or during prolonged shelf storage of the batteries prior to sale or use. Since permanent damage may occur to a typical lead-acid battery when it is maintained in a discharged state for extended periods, alarm 100 will sound as a reminder that battery 24 needs to be recharged. To prevent such damage to battery 24, it is desirable to keep the battery electrically connected to the recharger during extended periods of nonuse.
  • trickle charger 12 has an input plug or cord with plug 58 connected to AC line current, and output wires 60 connected to a plug 62 disposed on the upper surface of battery 24. Plug 62 is shown in Fig. 5.
  • Trickle charger 12 also may have a light emitting diode (LED) indicator 64 for indicating the state of the battery's charge.
  • LED light emitting diode
  • the line voltage could be 110 VAC, 60Hz or 220 VAC, 50Hz (the latter being commonly used in Europe) .
  • electric motor 18 includes a motor shaft 66 interconnected with a rotatable cutting member 50.
  • cutting member 50 is preferably a rotating blade, it is apparent that a rotating string or wire, or two or more rotatable blades, may be used instead.
  • the blades could have various lengths, such as 12, 14, 16 or 18 inches.
  • Motor 18 includes a top motor end cap 68, a bottom motor end cap 70, and two motor throughbolts 72.
  • Throughbolts 72 connect motor 18 and housing 26 together.
  • Throughbolts 72 have threaded ends 74 that are affixed to housing 26 via nuts 76.
  • Motor end cap 70 has apertures 78 which receive bolts 80.
  • Bolts 80 and nuts 82 affix the motor to adapter plate 84.
  • Bolts 83 and nuts 85 affix adapter plate 84 to deck 16.
  • adapter plate 84 To enable the electric motor to be used on existing lawnmower decks designed for gasoline-powered engines, it is desirable to place an adapter plate 84 adjacent end cap 70 to support motor 18 on the deck.
  • the purpose of adapter plate 84 is to cover a large portion of opening 86 in deck 16, if deck 16 was designed to accommodate a gasoline-powered engine.
  • Adapter plate 84 has an aperture 88 therein for receiving motor shaft 66.
  • the adapter plate may be made as an integrated part of end cap 70.
  • Electric motor 18 is powered by removable battery 24.
  • battery 24 When battery 24 is attached to housing 28, two electrical connectors 90 engage two mating connectors 92 interconnected with housing 28. Connectors 90 are shown attached to a flange 94 on the upper end of battery 24, although they may be placed in other locations as well.
  • Fig. 8 is a side view, shown in partial section, of one of connectors 90.
  • connector 90 is mechanically floatable to facilitate its engagement with mating connector 92.
  • Such mechanical floatability is achieved by placing washer 91 in an oversized opening 93, and by disposing terminal member 93 in an oversized opening 95.
  • other means could be used to achieve mechanical floatability, such as surrounding the connector in an elastomeric material.
  • a wire 96 is in circuit connection with connector 92. Wire 96 is connected directly to motor 18, or is connected to control circuit 20 if the control circuit is used. Control circuit 20 is desirable to control the power being supplied to motor 18 and thus prolong the lawnmower operating time on each of batteries 24.
  • Control circuit 20 may also be used to vary lawnmower operation according to the condition of the lawn.
  • One suitable control circuit is disclosed in U.S. patent application Serial No. 07/864,404 filed April 6, 1992 to Richard A. Dykstra et al, now Patent No. and assigned to Briggs & Stratton Corporation,
  • control circuits may be used.
  • Power is input to motor 18 via a wire 98 connected to the motor. If a control circuit is used, wire 98 is connected to control circuit 20. If no control circuit is used, wire 98 is connected in series with key switch 102 and cut-off switch 48.
  • the power unit also includes a key-type switch 102 connected in circuit between battery 24 and motor 18.
  • Key switch 102 is adapted to receive a key 104 therein.
  • Key switch 102 is an on/off switch.
  • the power unit also includes indicator means for indicating the state of battery charge as well as the magnitude of the load being applied to the motor.
  • LED 106 is green when battery 24 is charged above a predetermined level, and turns red when the battery output falls below a predetermined level.
  • a single LED 106 provides both of these indicating functions.
  • LED 108 turns red when the load being applied to the motor is near or at full load, thereby indicting to the operator that the load should be decreased to prevent rapid discharge of battery 24 or possible damage to motor 18.
  • LED 108 may turn red, for example, when the operator is cutting wet or heavy grass.
  • the electric motor, the battery retaining means, and the control circuit (if used) as a single integral unit.
  • the integral unit would then be bolted or otherwise mechanically connected to the mower deck.
  • Figs. 4 through 7 relate to the means for recharging the removable battery according to the present invention.
  • Figs. 4-6 depict stand-alone recharger 14;
  • Fig. 7 is a schematic diagram of the stand-alone recharger circuit.
  • the recharger circuit described herein may be one of many types of circuits used to recharge batteries such as lead acid batteries.
  • each of batteries 24 and 24a is received in a respective opening 54 and 54a located at the upper ends of battery recharger 14.
  • Recharger 14 has two opposed handles 110 which enable the recharger to be carried from one place to another.
  • Each battery 24 and 24a has two female-type connectors 90 and 90a respectively, that receive male-type connectors 112 and 112a respectively, the latter connectors being disposed on recharger 14.
  • Also located on the upper surface of recharger 14 are a pair of optional ammeters 114 and 114a which show the state of charge of batteries 24 and 24a respectively.
  • Ammeters 114 and 114a are connected by wires 116 and 116a respectively to a pair of regulators 118 and 118a respectively (Fig. 7) .
  • LED' s may also be used to indicate the state of charge of batteries 24 and 24a.
  • each battery has a positive terminal and a negative terminal.
  • battery 24 has two connectors 90 and battery 24a has two connectors 90a.
  • Each of the negative terminals is connected to ground at points 122 and 124. In practice, these ground terminals consist of screw-type connectors fastened to the housing of recharger 14 (Fig. 5) .
  • Each of the positive terminals of the batteries is connected to the respective ammeter 114 or 114a by wires 126 and 126a respectively.
  • Ammeters 114 and 114a are connected to their respective regulators 118 and 118a by wires 128 and 128a respectively.
  • recharger 14 is connected to a 110 VAC power supply via a connector 130.
  • Connector 130 is a three-prong connector, with one prong 132 being connected to ground.
  • a second prong is connected to a fuse 134, the latter being connected in series with an on/off switch 136.
  • An LED 138 is connected to the switch to indicate whether power is being supplied to the recharger.
  • Lines 140 and 142 of connector 130 are connected across a primary winding 144 of transformer 146.
  • Each of regulators 118 and 118a is connected across a secondary winding 148 of transformer 146 via lines 150 and 152. Two transformers may also be used, with regulator 118 connected to a first transformer and regulator 118a connected to the other transformer. Regulators 118 and 118a regulate the recharging of batteries 24 and 24a respectively to prevent the batteries from being overcharged.
  • the vegetation cutting system may include a single battery, or two or more batteries.
  • the number and/or size of batteries that are included in the system are dictated by cost factors and by the length of time the operator wants to run the lawnmower continuously. For example, the operator may have a small lawn and thus be able to cut the entire lawn in 20 to 30 minutes. In that case, the operator would only require a single small battery, which will run the lawnmower from 15 to 30 minutes.
  • the user may purchase a system (or upgrade a previously-purchased single battery system) to include two or more batteries.
  • the operator runs the lawnmower with a first battery until the first battery discharges below a predetermined level.
  • the first battery is then placed in the battery recharger as depicted in Fig. 6.
  • a second, recharged battery which may have been connected to the battery recharger, is then connected to battery housing 26 or inserted into the opening of battery housing 26 (Fig. 1) , and the operation of the lawnmower is continued.
  • the second battery has discharged below a predetermined level as indicated by indicator 106 (Fig. 3) , the second battery is electrically disconnected from motor 18 and is removed from battery housing 26.
  • the second battery is then electrically connected to recharger 14 by either attaching the battery to the recharger or by inserting the second battery into one of openings 54 of the recharger (Fig. 1) . Thereafter, either the recharged first battery or a third battery is placed in opening 28 of housing 26 of the lawnmower (Fig. 1) , so that operation of the lawnmower is continued. It may be desirable to use a quick-charge recharger 14 to enable the first battery to be recharged to above approximately 80% of full charge within a short period of time.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

Le dispositif de coupe de gazon actionné par batterie utilise une ou plusieurs batteries amovibles et rechargeables (24) permettant à la tondeuse à gazon de fonctionner pendant une durée prolongée. La tondeuse à gazon fonctionne avec une première batterie jusq'à ce que celle-ci soit déchargée à un niveau sélectionné. On enlève ensuite la première batterie, on la place dans un chargeur rapide (14) et on la remplace par une deuxième batterie chargée. On fait fonctionner la tondeuse à gazon jusqu'à ce que le gazon soit coupé ou jusqu'au déchargement de la deuxième batterie. On enlève ensuite la deuxième batterie et on la remplace soit par la première batterie rechargée, soit par une troisième batterie chargée. Chacune des batteries peut être relativement petite et est pourvue d'une poignée (52) à son extrémité supérieure, afin de pouvoir la soulever facilement hors de la tondeuse à gazon et la porter vers le chargeur. Le poids de la tondeuse à gazon est limité, ce qui augmente sa maniabilité étant donné qu'une seule batterie relativement petite est portée à la fois par la tondeuse.
PCT/US1994/009431 1993-09-22 1994-08-22 Dispositif de coupe de vegetation actionne par batterie et procede d'utilisation Ceased WO1995008256A1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
AU76008/94A AU7600894A (en) 1993-09-22 1994-08-22 Battery-powered vegetation cutting system and method of using same
EP95913566A EP0777410A2 (fr) 1994-08-22 1995-03-02 Systeme ameliore de tondeuse a gazon a batteries
JP8508036A JP2837960B2 (ja) 1994-08-22 1995-03-02 バッテリー駆動型の改善された芝刈り装置
AU20953/95A AU684928B2 (en) 1994-08-22 1995-03-02 Improved battery-powered lawn cutting system
BR9508744A BR9508744A (pt) 1994-08-22 1995-03-02 Sistema de corte de grama energizado a bateria aperfeiçoado
CA002195995A CA2195995C (fr) 1994-08-22 1995-03-02 Systeme ameliore de tondeuse a gazon a batteries
PCT/US1995/002765 WO1996005719A2 (fr) 1994-08-22 1995-03-02 Systeme ameliore de tondeuse a gazon a batteries
AU56423/98A AU695414B2 (en) 1994-08-22 1998-03-02 Apparatus for mounting a removable battery to a lawnmower
AU56424/98A AU701777B2 (en) 1994-08-22 1998-03-02 A safety device for electric lawnmowers
AU56425/98A AU5642598A (en) 1994-08-22 1998-03-02 A safety interlock for a lawnmower
AU56422/98A AU5642298A (en) 1994-08-22 1998-03-02 Apparatus for simultaneously recharging two batteries

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12548693A 1993-09-22 1993-09-22
US8/125,486930922 1993-09-22

Publications (1)

Publication Number Publication Date
WO1995008256A1 true WO1995008256A1 (fr) 1995-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/009431 Ceased WO1995008256A1 (fr) 1993-09-22 1994-08-22 Dispositif de coupe de vegetation actionne par batterie et procede d'utilisation

Country Status (2)

Country Link
AU (1) AU7600894A (fr)
WO (1) WO1995008256A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528166C1 (de) * 1995-08-01 1996-08-01 Wolf Geraete Gmbh Vertrieb Rasenmäher
FR2730376A1 (fr) * 1995-02-14 1996-08-14 Briggs & Stratton Corp Tete motrice pour dispositif de coupe de l'herbe electrique
DE19528167C1 (de) * 1995-08-01 1996-08-29 Wolf Geraete Gmbh Vertrieb Rasenmäher
US5787693A (en) * 1994-10-28 1998-08-04 Black & Decker Inc. Universal, retrofittable powerhead for small gasoline engine power implements
FR2768298A1 (fr) * 1997-09-12 1999-03-19 Wolf Outils Tondeuse a gazon a moteur electrique
GB2338392A (en) * 1998-06-16 1999-12-22 Black & Decker Inc Switch for battery powered lawn mower.
WO2003090596A1 (fr) * 2002-04-25 2003-11-06 Polar Light Limited Procede de mise en fonctionnement d'un dispositif
CN108496526A (zh) * 2017-02-24 2018-09-07 苏州宝时得电动工具有限公司 一种行走机械设备及其控制方法、装置和设备
CN109874487A (zh) * 2016-06-30 2019-06-14 创科（澳门离岸商业服务）有限公司 一种自主式割草机及其导航系统
US11172607B2 (en) 2016-06-30 2021-11-16 Tti (Macao Commercial Offshore) Limited Autonomous lawn mower and a system for navigating thereof
US11592819B2 (en) * 2016-11-29 2023-02-28 Briggs & Stratton, Llc Robotic lawn mower including removable rechargeable battery module

Citations (7)

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Publication number Priority date Publication date Assignee Title
US3581480A (en) * 1969-09-30 1971-06-01 Black & Decker Mfg Co Multiple-function receptacle and interconnecting plugs therefor
FR2252802A1 (en) * 1973-11-30 1975-06-27 Gutbrod Werke Gmbh Lawn mower with chassis to carry garden equipment - electric rotary type with power take off for other motorised tools
US3973378A (en) * 1975-03-18 1976-08-10 Disston, Inc. Cordless grass trimmer having removable battery pack
DE2545629A1 (de) * 1975-10-11 1977-04-21 Erich Wunsch Elektrisches garten-handgeraet, insbesondere gras- oder heckenschere
US4446680A (en) * 1982-04-26 1984-05-08 Alessandro Thomas C D Battery powered lawn edger
FR2636498A1 (fr) * 1988-09-20 1990-03-23 Balva Claude Dispositif tondeuse a gazon alimente par une batterie
DE9313032U1 (de) * 1993-08-31 1993-12-02 AL-KO Geräte GmbH, 89359 Kötz Mobiles Arbeitsgerät

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581480A (en) * 1969-09-30 1971-06-01 Black & Decker Mfg Co Multiple-function receptacle and interconnecting plugs therefor
FR2252802A1 (en) * 1973-11-30 1975-06-27 Gutbrod Werke Gmbh Lawn mower with chassis to carry garden equipment - electric rotary type with power take off for other motorised tools
US3973378A (en) * 1975-03-18 1976-08-10 Disston, Inc. Cordless grass trimmer having removable battery pack
DE2545629A1 (de) * 1975-10-11 1977-04-21 Erich Wunsch Elektrisches garten-handgeraet, insbesondere gras- oder heckenschere
US4446680A (en) * 1982-04-26 1984-05-08 Alessandro Thomas C D Battery powered lawn edger
FR2636498A1 (fr) * 1988-09-20 1990-03-23 Balva Claude Dispositif tondeuse a gazon alimente par une batterie
DE9313032U1 (de) * 1993-08-31 1993-12-02 AL-KO Geräte GmbH, 89359 Kötz Mobiles Arbeitsgerät

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5787693A (en) * 1994-10-28 1998-08-04 Black & Decker Inc. Universal, retrofittable powerhead for small gasoline engine power implements
FR2730376A1 (fr) * 1995-02-14 1996-08-14 Briggs & Stratton Corp Tete motrice pour dispositif de coupe de l'herbe electrique
DE19528166C1 (de) * 1995-08-01 1996-08-01 Wolf Geraete Gmbh Vertrieb Rasenmäher
DE19528167C1 (de) * 1995-08-01 1996-08-29 Wolf Geraete Gmbh Vertrieb Rasenmäher
WO1997004638A1 (fr) * 1995-08-01 1997-02-13 Wolf-Geräte Gmbh Vertriebsgesellschaft Kg Tondeuse a gazon a accumulateurs
US5937623A (en) * 1995-08-01 1999-08-17 Wolf-Gerate Gmbh Vertriebsgesellschaft Accumulator-powered lawn-mower
FR2768298A1 (fr) * 1997-09-12 1999-03-19 Wolf Outils Tondeuse a gazon a moteur electrique
EP0966011A3 (fr) * 1998-06-16 2000-07-26 Black & Decker Inc. Commutateur électrique
GB2338392A (en) * 1998-06-16 1999-12-22 Black & Decker Inc Switch for battery powered lawn mower.
US6404078B1 (en) 1998-06-16 2002-06-11 Black & Decker Inc. Electric switch
WO2003090596A1 (fr) * 2002-04-25 2003-11-06 Polar Light Limited Procede de mise en fonctionnement d'un dispositif
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