WO2005079550A1 - Instrument de creusage - Google Patents

Instrument de creusage Download PDF

Info

Publication number
WO2005079550A1
WO2005079550A1 PCT/GB2005/000624 GB2005000624W WO2005079550A1 WO 2005079550 A1 WO2005079550 A1 WO 2005079550A1 GB 2005000624 W GB2005000624 W GB 2005000624W WO 2005079550 A1 WO2005079550 A1 WO 2005079550A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
digging
handle
footrest
adjustment
Prior art date
Application number
PCT/GB2005/000624
Other languages
English (en)
Inventor
Paul Clements
Original Assignee
Paul Clements
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 Paul Clements filed Critical Paul Clements
Publication of WO2005079550A1 publication Critical patent/WO2005079550A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B1/00—Hand tools
    • A01B1/22—Attaching the blades or the like to handles; Interchangeable or adjustable blades
    • A01B1/222—Adjustable blades
    • A01B1/225—Adjustable blades around a substantially horizontal axis
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B1/00—Hand tools
    • A01B1/02—Spades; Shovels
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B1/00—Hand tools
    • A01B1/22—Attaching the blades or the like to handles; Interchangeable or adjustable blades

Definitions

  • the present invention relates to a device such as a spade or the like for use in digging, and in particular relates to a digging device designed to minimise physical strain on a user during use.
  • Digging implements have a variety of uses, including uprooting weeds, vegetables and other plants, as well as working soil.
  • a conventional digging implement such as a spade or digging fork has a long handle to the lower end of which is secured a digging blade or fork tines.
  • To uproot weeds for example, the user pushes the blade or fork into the earth next to a weed, using force exerted on the blade by the foot of the user, and then, using the handle as a lever, pulls back on the handle forcing the blade or fork tines upwardly beneath the weed until the weed is free of the ground.
  • the blade or fork tines, and hence the handle of the digging implement must be moved to a nearly horizontal position close to the ground before complete uprooting of the weed occurs. This has a disadvantage of requiring the user to bend at the waist. However, this digging action may be either undesirable or impossible for some users and therefore such a digging action cannot be carried out.
  • the present invention seeks to address the problems of the prior art.
  • a first aspect of the present invention provides a device for use in digging comprising an elongate shaft defining a longitudinal axis with means adapted to receive a first handle at a first end thereof and means adapted to receive a digging means at an opposing end thereof and a footrest located between the first end and the opposing end of the shaft so as to intersect the longitudinal axis defined by the elongate shaft such that, in use, the digging means is moveable relative to the footrest about an axis perpendicular to the longitudinal axis.
  • the term digging is intended to encompass digging of any material, working of any material including soil, weeding of the ground or growing bed or the like and all similar operations.
  • footrest it is intended a surface on which the foot of a user may rest during use of the device.
  • the foot of the user may rest on the footrest, the foot of the user thereby intersecting the longitudinal axis defined by the shaft.
  • the foot of the user cannot intersect a longitudinal axis defined by the shaft of the device as the footrest is not continuous, but is interrupted by the shaft itself.
  • the user places a foot on the footrest, and exerts a downward force onto the footrest, thereby pushing the device into the ground.
  • the force exerted by the user on the footrest is more centrally applied to the digging means than would be possible with prior art digging devices such as a spade, in which the foot of the user is displaced from a central point above the digging means.
  • the shaft of a device may be further provided with means adapted to receive a second handle between the first end and the opposing end of the shaft, such that in use, the digging means is moveable about an axis perpendicular to the longitudinal axis.
  • the second handle preferably comprises a shaft provided with means for gripping by a user during use of the device.
  • the shaft and means for gripping by a user may be integral or may be two or more separate members which are interconnected for use.
  • a device according to the present invention further comprises an adjustment means to allow adjustment of the position of the digging means relative to the shaft.
  • the digging means may be pivoted through difference angles relative to the longitudinal axis defined by the shaft and may be retained at various angles relative to the shaft between and open position and a closed position.
  • a device according to the present invention further comprises a first handle located at a first end of the shaft.
  • a device according to the present invention further comprises a digging means located at an end of the shaft opposing the means adapted to receive a first handle.
  • a device according to a second aspect of the present invention further comprises a second handle located between the first end and the opposing end of the shaft.
  • the second handle is moveable relative to the digging means about the elongate axis defined by the shaft.
  • the second handle may be fixed relative to the shaft.
  • the shaft may be hollow with connection means extending therethrough thereby connecting the digging means to the first handle.
  • the second handle may be moveable relative to the shaft about the elongate axis defined by the shaft.
  • the second handle may be moveable relative to the shaft about an axis perpendicular to the longitudinal axis defined by the shaft, between a collapsed position and an extended position. In this way, the second handle may be retained in a collapsed position when not in use, for example when the device is being stored, and may be moved to an extended position of use when lifting and/or unloading material from the device.
  • the second handle may be detachable from the shaft or removable, for example, to allow easier storage of the device.
  • the second handle may be hingedly connected to the shaft.
  • the second handle is connected to the shaft by means of a multifunctional joint such that the second handle may be moved both about the longitudinal axis defined by the shaft and about an axis perpendicular to the longitudinal axis.
  • the device further comprises an adjustment release means for releasing the adjustment means and allowing the digging means to return to an open position.
  • the adjustment release means may be a switch or lever provided on the first handle which, when operated, releases the adjustment means thereby allowing the digging means to return to the open position by means of a central biasing force operable to bias the digging means in the open position.
  • the central biasing force may comprise a spring or the like.
  • the adjustment release means may be provided on the first handle so that, in use, the user may control the release of the adjustment means and return the digging means to an open position using a single-handed action without having to release their grip on the first or second handles.
  • the adjustment means comprises a locking mechanism.
  • the locking mechanism comprises complementary inter-engagement members, such as a pawl and a member provided with a plurality of recesses within at least one of which said pawl may be received.
  • complementary inter-engagement members such as a pawl and a member provided with a plurality of recesses within at least one of which said pawl may be received.
  • any other suitable adjustment means may be used such as, for example, a conventional ratchet mechanism.
  • the adjustment means may be manually actuated.
  • the device may further comprise a powered drive means, such as a solenoid/electro magnet or motor, or any other suitable drive means.
  • the device may be further provided with a power source such as a battery or the like, for example, to power the drive means.
  • a power source such as a battery or the like, for example, to power the drive means.
  • the device may be provided with a connector for connection with an external power source, by which to power the drive means.
  • the footrest is provided with abutments to retain the foot of a user within the footrest. This allows the user to exert force on the footrest without risk that their foot will slip off the footrest as would typically be the case with a prior art digging device such as a spade or the like.
  • the footrest is at least partially enclosed around the space which in use would be occupied by the foot of a user. In this way, additional security is provided to the user that their foot will be retained within the footrest during use.
  • the digging means is releasably connected to the elongate shaft. This allows the device to be used with interchangeable digging means such that the digging means used may be selected based on the type of digging action to be carried out and/or the conditions of the material to be dug. For example, if the digging action involves breaking up soil, a digging means such as a spade head may be most appropriate.
  • a digging means such as a hoe-head or a digging means comprising rake-like tines may be more appropriate. Therefore, in use, the user may attach a selected digging means to the shaft, carry out the desired digging operation and then replace the digging means with another digging means when required or desired.
  • a device according to the present invention may comprise a spade, or may comprise a digging fork or any other suitable digging device.
  • a further aspect of the present invention provides a digging means for use with a device according to a preceding aspect of the invention in which the digging means is releasably connected to the shaft.
  • Figure 1 is a three dimensional view of an embodiment of a device according to the present invention
  • Figure 2 is a three dimensional view of an electrically driven version of the embodiment of figure 1
  • Figure 3 is a cross-sectional view of the embodiment of figure 1
  • Figures 4A to D are cross-sectional views of a further embodiment of a device according to the present invention, in use
  • Figures 5A and B are views of a further embodiment of a device according to the present invention
  • Figure 6 is a perspective view of an electrically driven version of a further embodiment of a device according to the present invention
  • Figure 7 is a cross-sectional view of a part of a mechanically driven version of the embodiment of figure 6.
  • Figure I shows a device 10 according to the present invention for use in digging, the device 10 having a first handle 20, an elongate shaft 30 and a digging means in the form of a blade 40.
  • a footrest 50 is located above the blade 40 such that the footrest 50 intersects the axis A defined by the elongate shaft 30.
  • a user places a foot on the footrest 50 and applies a downward force through the footrest 50 thereby driving the digging device 10 into the material to be dug.
  • the sides 60 of the footrest 50 prevent the foot of a user from slipping off the footrest 50 when downward force is applied by the user to the footrest 50.
  • This safety feature prevents slipping of the user's foot off the footrest and subsequent injury to the user caused by accidental contact between the lower leg and/or foot of the user and the edge of the digging device as can often occur during use of prior art spades and the like.
  • the first handle 20 is fixedly connected to an elongate shaft 30 and to the blade 40.
  • the blade 40 is hingedly connected to the shaft 30 and is capable of pivotal movement about an axis C perpendicular to the longitudinal axis A defined by the shaft 30.
  • the moveable footrest 50 with sides 60 moves in the direction of Axis A of the shaft 30 and is connected to a lever 180 at the first handle 20.
  • the position of the blade 40 relative to the shaft 30 is controlled by means of a locking mechanism.
  • the locking mechanism is shown in more detail in figure 3 where toothed member 80 is shown at the upper edge of the blade 40 and the lower surface of the footrest 50 comprises a pawl 90 for inter-engagement with recesses formed in the toothed member 80.
  • a spring 170 is provided to re-establish inter-engagement of the pawl 90 and toothed member 80 after disengagement of the pawl 90 and toothed member 80 by lever 180.
  • the arrow shown in figure 3 indicates the movement of the pawl 90 located on the lower surface of footrest 50, relative to the toothed member 80, the pawl 90 moving upwards out of inter-engagement with the toothed member 80 on actuation of lever 180 shown in figure 1; and downwards to inter-engage with toothed member 80 on release of lever 180 under the influence of biasing spring 170.
  • the pressure applied by the user on the footrest 50 as shown in figure 3, further ensures a positive lock of the pawl 90 with the toothed member 80.
  • the locking mechanism described in relation to the embodiment of figure 3 comprises an inter-engaging pawl and toothed member
  • this arrangement could be replaced by any suitable locking mechanism known to the skilled person.
  • a conventional ratchet mechanism could be used, comprising a spring-loaded pawl and a toothed member which will disengage automatically under pressure to allow movement in one direction, but lock automatically in the reverse direction.
  • the exemplified pawl and toothed member arrangement is preferred.
  • the device (10) is also provided with a second or auxiliary handle 70 connected to shaft 30.
  • the second handle 70 is capable of rotating relative to shaft 30 about the longitudinal axis A defined by the shaft 30.
  • the second handle 70 is also capable of moving perpendicularly to the longitudinal axis A defined by the shaft 30, as shown by arrows D in figure 1. This allows the second handle 70 to be folded against the shaft 30, for example, for the purposes of storage and/or transit and the like.
  • the second handle 70 is also capable of rotating about its own longitudinal axis, as shown by arrow E in figure 1.
  • the device shown in figure 2 may be further provided with a connector 150 for connection of the device 10 to an electrical power supply to drive a motor 160 to operate the locking mechanism.
  • the motor 160 is connected to an electrical switch 190 at the first handle 20.
  • FIGS 4 and 5 show how the digging device 10 may be used to dig up material such as soil or the like, thereby loading the blade 40 with the dug-up material.
  • a shown in figure 4A the first step is to push the digging device 10 into the ground 100.
  • the digging device 10 shown in figure 4 has a central footrest 50 (not shown) and force is therefore applied by a user by placing the foot of the user on the footrest 50 and applying force thereto to push the digging device into the ground 100.
  • Figure 4A shows the digging device 10 inserted into the soil, with the second handle 70 in a closed position. During the digging process, the user will grip the first handle 20 of the digging device 10 only.
  • Figure 4B shows the digging device in a tilted position, thereby moving a portion of soil from the ground 100.
  • the first handle 20 and the blade 40 have been moved further from the vertical when compared with its position in figure 4A.
  • the adjustment release means By actuating the adjustment release means the user may now move the shaft 30 of the digging device 10 into a more vertical position once again, whilst retaining the blade 40 in its tilted position.
  • the adjustment release means has been released and the pawl 90 has reengaged with toothed member 80 (not shown), the shaft 30 assumes a fixed position relative to the blade 40, as shown in figure 4C.
  • Figure 4D shows that the shaft 30 and blade 40 may once again be tilted by the user away from a vertical position, thereby further digging out a portion of soil from the ground 100. This process may be repeated as many times as necessary to dig out the desired amount of soil from the ground 100 without excessive bending or stretching on the part of the user.
  • FIGs 5 A and 5B show how a loaded blade 40 of a digging device 10 according to the present invention may be unloaded without undue bending or stretching on the part of the user.
  • the blade 40 of the digging device is loaded with soil.
  • the second handle 70 of the digging device 10 is in an open position and, in use, the user holds the first handle 20 with one hand and the second handle 70 with the other hand, thereby allowing stable movement of the digging device from one location to another without the excessive strain through the arms of the user which would be experienced if only a first handle 20 was provided.
  • the digging device is then moved to a desired location for unloading.
  • the digging device is unloaded by holding the second handle 70 steady while rotating the first handle 20 about a longitudinal axis defined by the elongate shaft 30.
  • the blade 40 is rotated about the longitudinal axis also thereby causing the load to slide off the blade 40. This allows the load to be moved from one location to another and subsequently unloaded by a user without the need for bending or stretching.
  • the user may return the blade 40 to the open position (as shown in figure 4A) ready for another digging operation.
  • a digging device 10 according to the present invention may be a spade, as shown for example, in figure 1.
  • the blade 40 may be substituted by any other suitable digging means, such as a digging fork attachment, a hoe attachment or even a trowel attachment, as shown in figure 6.
  • FIG. 6 shows an electrically driven long-handled trowel according to second aspect of the present invention, in which the device 10 is provided with a first handle 20 at one end of an elongate shaft 30 having an electrical switch/button 190 for actuation of powered drive means 160 for driving adjustment of the position of a trowel attachment 110 relative to the shaft 30.
  • the trowel attachment 110 is provided as an alternative to the blade 40 of the device 10 shown in figures 1 to 5.
  • the trowel attachment 110 is provided at the opposite end of the shaft 30 from the first handle 20.
  • a locking mechanism is provided between the trowel attachment 110 and the shaft 30, and a second handle 70 is provided on the shaft 30, by means of a connection joint allowing the second handle 70 to rotate relative to the shaft 10 about a longitudinal axis A defined by the shaft 30.
  • the second handle 70 is also capable of moving perpendicularly to the longitudinal axis A defined by the shaft 30, as shown by arrow D in figure 6, as well as being capable of rotation about its own longitudinal axis, as shown by arrow E
  • the device 10 is operated in a similar manner to that described for the device 10 shown in figures 4A to D and 5A and 5B.
  • Figure 7 shows a first handle 20 of a mechanically driven version of the device shown in figure 6.
  • the adjustment release means comprises a push button 120 provided in the first handle 20, connected to a flexible cable 130 attached to a pawl 90 (see figure 6) for inter-engagement with a toothed member 80 (see figure 6).
  • the button 120 By pushing the button 120, the user effectively draws the flexible cable 130 up into the first handle 20 of the digging device 10, thereby withdrawing the pawl 90 from the toothed member 80 and allowing the trowel attachment 110 to return to an open position (see figure 4A).
  • a spring 140 biases the push button 120 to a returned non-actuated position, thereby releasing the flexible cable 130 and allowing the pawl 90 to return to a position where the pawl 90 may once again inter-engage with the toothed member 80.
  • the pawl 90 must be deliberately moved out of the recesses in the toothed member 80 by mechanical force as the shaft 30 of the digging device 10 is moved relative to the trowel attachment 110, to allow the angle of the trowel attachment 110 relative to the shaft 30 to be changed and the pawl then re-engaged, under the influence of a biasing spring 170, with the toothed member 80 to secure the trowel 110 in place relative to the shaft 30.
  • the handle 20 may be swivelled around the shaft 30 so as to allow adjustment of the orientation of the handle 20 relative to the shaft 30. This allows the position of the handle 20 to be adjusted for the comfort of the user.
  • the handle once located in the preferred orientation, is retained in place by means of a clamping screw 200.
  • any other suitable retaining means could be used as an alternative to a clamping screw.
  • the provision of an adjustable handle allows, for example, a wheelchair-bound user to adjust the orientation of handle 20 so as to be able to use the device from the side, rather than for use directly in front of the body of a user, thus increasing the ease of use of the device.
  • the handle is adjustable in this way, whilst described in relation to a device with a trowel attachment, is equally applicable to any digging device according to any aspect of the present invention.
  • the same adjustment means may be provided on the second handle 70, as shown, for example, in figure 7.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Rehabilitation Tools (AREA)

Abstract

L'invention concerne un dispositif servant à creuser. Ce dispositif comprend un manche allongé (30) qui définit un axe longitudinal et comporte un moyen destiné à recevoir une première poignée à une première extrémité, et un moyen destiné à recevoir un moyen de creusage à l'extrémité opposée, ainsi qu'un repose-pied (50) qui est disposé entre la première extrémité et l'extrémité opposée du manche (30) de manière à croiser l'axe longitudinal défini par le manche allongé (30), de sorte que, lors de l'utilisation, le moyen de creusage puisse être déplacé, par rapport au repose-pied (50), autour d'un axe perpendiculaire à l'axe longitudinal.
PCT/GB2005/000624 2004-02-20 2005-02-18 Instrument de creusage WO2005079550A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0403760.2 2004-02-20
GBGB0403760.2A GB0403760D0 (en) 2004-02-20 2004-02-20 Digging implement

Publications (1)

Publication Number Publication Date
WO2005079550A1 true WO2005079550A1 (fr) 2005-09-01

Family

ID=32040056

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/000624 WO2005079550A1 (fr) 2004-02-20 2005-02-18 Instrument de creusage

Country Status (2)

Country Link
GB (2) GB0403760D0 (fr)
WO (1) WO2005079550A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20110843A1 (it) * 2011-05-13 2012-11-14 Valmas Di Massimo Gramegna Struttura di vanga manuale perfezionata

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE574392C (de) * 1933-08-07 Johann Maly Spaten mit drehbarem Spatenblatt
OA02067A (fr) * 1965-05-13 1970-05-05 Amleto Vigorito Perfectionnement pour bêche.
US4180289A (en) * 1977-10-06 1979-12-25 Faine Eric N Gardening tool
US6315341B1 (en) * 2000-08-11 2001-11-13 Sandra Leon Shovel having an adjustable blade angle
US20030074765A1 (en) * 2001-10-22 2003-04-24 Quimby John Daniel Tool handle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB810800A (en) * 1954-03-26 1959-03-25 Wilkinson Sword Ltd Improvements in spades
FR2249997B1 (fr) * 1973-10-31 1979-03-09 Pomeret Jean Claude
GB1533014A (en) * 1977-03-01 1978-11-22 Stanley G Hand-held lifting implements
GB2120511B (en) * 1982-05-13 1985-08-29 Keith William Eustace Webster Hand tool
US4904011A (en) * 1988-06-02 1990-02-27 Hawk Ernest D Shovel and method of making the same
GB2266438A (en) * 1992-04-30 1993-11-03 Hugh Macintyre Double handled tools.
GB2342555A (en) * 1998-09-18 2000-04-19 Digby Uk Limited Ground penetrating implements
GB9921897D0 (en) * 1999-09-16 1999-11-17 Hafidh Cole I Ratchet mechanize digging tools
GB0202821D0 (en) * 2002-02-07 2002-03-27 York William Digging tool

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE574392C (de) * 1933-08-07 Johann Maly Spaten mit drehbarem Spatenblatt
OA02067A (fr) * 1965-05-13 1970-05-05 Amleto Vigorito Perfectionnement pour bêche.
US4180289A (en) * 1977-10-06 1979-12-25 Faine Eric N Gardening tool
US6315341B1 (en) * 2000-08-11 2001-11-13 Sandra Leon Shovel having an adjustable blade angle
US20030074765A1 (en) * 2001-10-22 2003-04-24 Quimby John Daniel Tool handle

Also Published As

Publication number Publication date
GB0503479D0 (en) 2005-03-30
GB2411095B (en) 2007-09-26
GB0403760D0 (en) 2004-03-24
GB2411095A (en) 2005-08-24

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