GB2174287A - Improvements relating to the use of power tools - Google Patents

Improvements relating to the use of power tools Download PDF

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Publication number
GB2174287A
GB2174287A GB08511407A GB8511407A GB2174287A GB 2174287 A GB2174287 A GB 2174287A GB 08511407 A GB08511407 A GB 08511407A GB 8511407 A GB8511407 A GB 8511407A GB 2174287 A GB2174287 A GB 2174287A
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GB
United Kingdom
Prior art keywords
weight
powertool
operator
section
cable
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
GB08511407A
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GB8511407D0 (en
GB2174287B (en
Inventor
William Ernest Davies
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB08511407A priority Critical patent/GB2174287B/en
Publication of GB8511407D0 publication Critical patent/GB8511407D0/en
Publication of GB2174287A publication Critical patent/GB2174287A/en
Application granted granted Critical
Publication of GB2174287B publication Critical patent/GB2174287B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0028—Tool balancers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Harvester Elements (AREA)

Abstract

A support apparatus for use in aiding the manual support of a power tool comprises a framework adapted to be secured to an operator's back, having a back section (1) and a jib section (3). Located within an elongate guide (7) secured to the back section (1), is a counterbalance weight (11), which is movable along the elongate guide (7) and connected to one end of a cable (13) which extends out of the guide and over pulley wheels (17) on the jib section (3). The free end of the cable (13) has a clip (19) which enables the cable to be secured to a power tool. Preferably the counterbalance weight (11) is slightly heavier than the power tool, so that the power tool is balanced in a desired position and can be manually raised or lowered from this position with a minimum of effort. <IMAGE>

Description

SPECIFICATION Improvements relating to the use of power tools The present invention relates to a support apparatus for use in aiding the manual support of a powertool during use.
Conventionally power tools are relatively heavy due to the necessary inclusion of a drive motor. Thus, manual operation of such tools over extended periods of time can be extremely tiring. This is especially the case with an electric hedge cutter, where the hedge cutter has to be heldfora period oftime with the arms outstretched whilst the top of a hedge is being cut.
The aim ofthe presentinvention isto provide a supportapparatuswhich can take the weightofa powertool, or at leastthe majoritythereof, off an operator's arms, thus making iteasierto operate the powertool over a period oftime.
According to the present invention there is provided a support apparatus for use in aiding the manual supportofa powertool, said apparatus comprising a framework adapted to be secured to an operator's back,theframeworkhaving a jib section and a back section, a counterbalance weight being displaceably located within an elongate guide secured to the back section, with a cable attached to the counterbalance weight extending outfrom the elongate guide and overfurtherguides on the jib section, thefree end of the cable being adapted to be secured a power tool.
Thus, in use,theframework is secured an operator's back, with the jib section extending over the operator's head. With the free end of the cable attached to a powertool, e.g. an electric hedge cutter, the counterbalance weight slightly exceeds the weight ofthetool, making it easy forthetool to be held and used by the operator for long periods of time, even at arm's length. Slight manual forces on the tool will cause the counter-balance weightto slide up or down the elongate guide, to thus easily lower or raise the tool respectively. Alternatively, the counterbalance weight may be less than or equal to the weight ofthe tool to be supported.
In a preferred embodimentofthe present invention, the back section of the framework is generally rectangular and made of tubular sections, with appropriate padding and straps to secure the framework to an operator's back. The jib section is generallytriangularwith spaced guides in the form of freely rotatable pulleywheels overwhich the cable extends. Finally, the counterbalance weight is of tubular steel filled with lead,theweight being axially displaceable in a rectangular section elongate guide which is closed at its lower end.
With a hedge cutter of approximately 6-3/4 Ibs.
weight a counterbalance of preferably 7-lbs weight is used, so that an operator has to apply 1/4-lb. weight downward force to maintain the required tool position.
Whilstthe preferred embodiment ofthe present invention is preferably proposed to be made of metal, it is envisaged that the framework may alternatively be moulded from a suitable plastics material in one piece or as a number of interlocking sections.
The present invention will now be further described, by way of example, with reference to the accompanying drawing, in which a perspective view of a preferred embodiment of the present invention is shown.
The support apparatus illustrated in the accompanying drawing comprises a framework made of tubularsections,which is formed by a generally rectangularbacksection 1 and a generallytriangular jib section 3. As an alternative, the framework may be moulded from a suitable plastics material either in one piece or as several interlocking sections.
The back section 1 is provided with appropriate padding and straps 5 for use in securing the framework to an operator's back in the manner of a rucksack. Further, an elongate box-section guide 7 is secured to the back section 1 and is closed at its bottom end 9. Within the guide 7 a counterbalance weight 11 is axially displaceably located,the weight 11 comprising a cylindrical casing filled with lead.The weight 11 is secured to one end of a cable 1 3 which extends out ofthe open top end 15 ofthe guide 7, and across pulley wheel guides 17 on thejib section 3.The depending free end region 19 ofthe cable 13 is adapted to be secured to a powertool A.
In use, with the back section 1 strapped to an operator's back and the jib section 3 extending over the operator's head, the depending free end region 19 ofthe cable 13 is secu red to the powertool A. In this way, the counterbalance weight 1 1 counterbalances at least the majority ofthe weight ofthe power tool A, allowing a minimal force to be applied by the operator to raise or lowerthe powertool A; the counterbalance weight 11 sliding along the elongate guide 7.
In the event that friction hinders the movement of the counterbalance weight along the guide 7,the guide can be greased.
With, for exa m ple, a powertool of 6-3/4 Ibs. weight, a counterbalance weight of approx. 7-lbs is preferred, so that an operator has to apply a downward force of only 1/4-lb. weight to maintain the powertool position.
The present invention thus provides a simple support apparatus for use in aiding the manual support of a powertool during use.
1. Asupport apparatus for use in aiding the manual supportofa powertool, said apparatus comprising a framework adapted to be secured to an operator's back, the framework having a jib section and a back section, a counterbalance weight being displaceably located within an elongate guide secured to the back section, with a cable attached to the counterbalance weight extending outfromtheelon- gate guide and over a cable guide on the jib section, the free end of the cable being adapted to be secured to a power tool.
2. Asupport apparatus as claimed in claim 1, in which the back section is generally rectangular and made of tubular material, with appropriate padding and straps provided on theframeworkto secure the apparatus to an operator's back.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (13)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements relating to the use of power tools The present invention relates to a support apparatus for use in aiding the manual support of a powertool during use. Conventionally power tools are relatively heavy due to the necessary inclusion of a drive motor. Thus, manual operation of such tools over extended periods of time can be extremely tiring. This is especially the case with an electric hedge cutter, where the hedge cutter has to be heldfora period oftime with the arms outstretched whilst the top of a hedge is being cut. The aim ofthe presentinvention isto provide a supportapparatuswhich can take the weightofa powertool, or at leastthe majoritythereof, off an operator's arms, thus making iteasierto operate the powertool over a period oftime. According to the present invention there is provided a support apparatus for use in aiding the manual supportofa powertool, said apparatus comprising a framework adapted to be secured to an operator's back,theframeworkhaving a jib section and a back section, a counterbalance weight being displaceably located within an elongate guide secured to the back section, with a cable attached to the counterbalance weight extending outfrom the elongate guide and overfurtherguides on the jib section, thefree end of the cable being adapted to be secured a power tool. Thus, in use,theframework is secured an operator's back, with the jib section extending over the operator's head. With the free end of the cable attached to a powertool, e.g. an electric hedge cutter, the counterbalance weight slightly exceeds the weight ofthetool, making it easy forthetool to be held and used by the operator for long periods of time, even at arm's length. Slight manual forces on the tool will cause the counter-balance weightto slide up or down the elongate guide, to thus easily lower or raise the tool respectively. Alternatively, the counterbalance weight may be less than or equal to the weight ofthe tool to be supported. In a preferred embodimentofthe present invention, the back section of the framework is generally rectangular and made of tubular sections, with appropriate padding and straps to secure the framework to an operator's back. The jib section is generallytriangularwith spaced guides in the form of freely rotatable pulleywheels overwhich the cable extends. Finally, the counterbalance weight is of tubular steel filled with lead,theweight being axially displaceable in a rectangular section elongate guide which is closed at its lower end. With a hedge cutter of approximately 6-3/4 Ibs. weight a counterbalance of preferably 7-lbs weight is used, so that an operator has to apply 1/4-lb. weight downward force to maintain the required tool position. Whilstthe preferred embodiment ofthe present invention is preferably proposed to be made of metal, it is envisaged that the framework may alternatively be moulded from a suitable plastics material in one piece or as a number of interlocking sections. The present invention will now be further described, by way of example, with reference to the accompanying drawing, in which a perspective view of a preferred embodiment of the present invention is shown. The support apparatus illustrated in the accompanying drawing comprises a framework made of tubularsections,which is formed by a generally rectangularbacksection 1 and a generallytriangular jib section 3. As an alternative, the framework may be moulded from a suitable plastics material either in one piece or as several interlocking sections. The back section 1 is provided with appropriate padding and straps 5 for use in securing the framework to an operator's back in the manner of a rucksack. Further, an elongate box-section guide 7 is secured to the back section 1 and is closed at its bottom end 9. Within the guide 7 a counterbalance weight 11 is axially displaceably located,the weight 11 comprising a cylindrical casing filled with lead.The weight 11 is secured to one end of a cable 1 3 which extends out ofthe open top end 15 ofthe guide 7, and across pulley wheel guides 17 on thejib section 3.The depending free end region 19 ofthe cable 13 is adapted to be secured to a powertool A. In use, with the back section 1 strapped to an operator's back and the jib section 3 extending over the operator's head, the depending free end region 19 ofthe cable 13 is secu red to the powertool A. In this way, the counterbalance weight 1 1 counterbalances at least the majority ofthe weight ofthe power tool A, allowing a minimal force to be applied by the operator to raise or lowerthe powertool A; the counterbalance weight 11 sliding along the elongate guide 7. In the event that friction hinders the movement of the counterbalance weight along the guide 7,the guide can be greased. With, for exa m ple, a powertool of 6-3/4 Ibs. weight, a counterbalance weight of approx. 7-lbs is preferred, so that an operator has to apply a downward force of only 1/4-lb. weight to maintain the powertool position. The present invention thus provides a simple support apparatus for use in aiding the manual support of a powertool during use. CLAIMS
1. Asupport apparatus for use in aiding the manual supportofa powertool, said apparatus comprising a framework adapted to be secured to an operator's back, the framework having a jib section and a back section, a counterbalance weight being displaceably located within an elongate guide secured to the back section, with a cable attached to the counterbalance weight extending outfromtheelon- gate guide and over a cable guide on the jib section, the free end of the cable being adapted to be secured to a power tool.
2. Asupport apparatus as claimed in claim 1, in which the back section is generally rectangular and made of tubular material, with appropriate padding and straps provided on theframeworkto secure the apparatus to an operator's back.
3. Asupport apparatus as claimed in claim 1 or claim 2, inwhich the jib section isgenerallytriangular with the cable guide provided atthe apex of the triangularsection, remote from said back section.
4. Asupport apparatus as claimed in any one of claims 1 to 3, in which said cable guide is in the form of a freely rotatable pulley wheel over which the cable extends.
5. A support apparatus as claimed in any one of the preceding claims, in which the counterbalance weight is oftubular steel filled with lead.
6. Asupport apparatus as claimed in any one of the preceding claims, in which said elongate guide is formed by a hollow tube of rectangularsection, which is closed at its lower end.
7. Asupport apparatus as claimed in anyone of the preceding claims, in which the framework is made from a numberofinterlocking sections.
8. A support apparatus as claimed in any one of the preceding claims, in which the framework is made ofmetal.
9. A support apparatus as claimed in any one of claims 1 to 7, in which the framework is made of a plastics material.
10. Asupport apparatus as claimed in any one of claims 1 to 6, in which the framework is moulded in one piece using a suitable plastics material.
11. Asupportapparatus as claimed in any one of the preceding claims, in which a releasable clip is provided atthefree end ofthe cable, forsecuring the cableto a powertool.
12. Asupportapparatus as claimed in anyone of claims 1 to 1 1,when attached to a powertool,the counterbalance weight being heavierthan the power tool.
13. Asupportapparatusforusein aiding the manual support of a powertool, constructed and arranged substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB08511407A 1985-05-03 1985-05-03 Improvements relating to the use of power tools Expired GB2174287B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08511407A GB2174287B (en) 1985-05-03 1985-05-03 Improvements relating to the use of power tools

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08511407A GB2174287B (en) 1985-05-03 1985-05-03 Improvements relating to the use of power tools

Publications (3)

Publication Number Publication Date
GB8511407D0 GB8511407D0 (en) 1985-06-12
GB2174287A true GB2174287A (en) 1986-11-05
GB2174287B GB2174287B (en) 1988-12-07

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Family Applications (1)

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GB08511407A Expired GB2174287B (en) 1985-05-03 1985-05-03 Improvements relating to the use of power tools

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997014540A1 (en) * 1995-10-19 1997-04-24 Atlas Copco Berema Aktiebolag A device for supporting hand-held machine-driven tools
GB2306295A (en) * 1995-10-24 1997-05-07 David Slinger Optical instrument support
FR2812068A1 (en) 2000-07-20 2002-01-25 Ponte Fernand De Hedge trimmer support comprises frame, supported by shoulder straps and belt, with vertical pivoting mast with cable winder and horizontal telescopic extension through which cable runs
FR2882422A1 (en) * 2005-02-22 2006-08-25 Guiseppe Armetta Motorized portable tool assisting support for hedge pruning, has pole bearing link, and having pulley and groove housing carriage with guiding casters, where pole base is fixed on plate with sections linked by dismountable assembling units

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107414505A (en) * 2017-08-11 2017-12-01 安徽华隆精密机械有限公司 A kind of column durable type precise vertical machining centre

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1203250A (en) * 1967-12-21 1970-08-26 Mervyn Wilson Ltd Improvements in or relating to portable mounts particularly for motion-picture cameras

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1203250A (en) * 1967-12-21 1970-08-26 Mervyn Wilson Ltd Improvements in or relating to portable mounts particularly for motion-picture cameras

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997014540A1 (en) * 1995-10-19 1997-04-24 Atlas Copco Berema Aktiebolag A device for supporting hand-held machine-driven tools
GB2306295A (en) * 1995-10-24 1997-05-07 David Slinger Optical instrument support
GB2306295B (en) * 1995-10-24 1999-07-14 David Slinger Optical instrument support
FR2812068A1 (en) 2000-07-20 2002-01-25 Ponte Fernand De Hedge trimmer support comprises frame, supported by shoulder straps and belt, with vertical pivoting mast with cable winder and horizontal telescopic extension through which cable runs
FR2882422A1 (en) * 2005-02-22 2006-08-25 Guiseppe Armetta Motorized portable tool assisting support for hedge pruning, has pole bearing link, and having pulley and groove housing carriage with guiding casters, where pole base is fixed on plate with sections linked by dismountable assembling units

Also Published As

Publication number Publication date
GB8511407D0 (en) 1985-06-12
GB2174287B (en) 1988-12-07

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

Effective date: 20010503