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WO2002090936A1 - Extractor device for extracting an increment borer - Google Patents

Extractor device for extracting an increment borer Download PDF

Info

Publication number
WO2002090936A1
WO2002090936A1 PCT/GB2002/002137 GB0202137W WO02090936A1 WO 2002090936 A1 WO2002090936 A1 WO 2002090936A1 GB 0202137 W GB0202137 W GB 0202137W WO 02090936 A1 WO02090936 A1 WO 02090936A1
Authority
WO
WIPO (PCT)
Prior art keywords
borer
extractor device
extracting
increment
immobilising
Prior art date
Application number
PCT/GB2002/002137
Other languages
French (fr)
Inventor
John Waterhouse
Neil Loader
Original Assignee
Anglia Polytechnic University
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 Anglia Polytechnic University filed Critical Anglia Polytechnic University
Publication of WO2002090936A1 publication Critical patent/WO2002090936A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
    • G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/42—Low-temperature sample treatment, e.g. cryofixation

Definitions

  • the present invention relates to devices for extracting increment borers from objects to be cored, kits of parts for such devices and methods of extracting increment borers from such objects.
  • Increment borers are simple tools used to cut cylindrical cores from objects such as trees-, telegraph poles and the- like. These cores may be used, for example, to determine the age of a tree without cutting the tree down, or to investigate whether or not a pole is rotten in the centre.
  • a typical increment borer as shown in Figure 1, consists of a hollow, cylindrical, metal shaft 1, one end having a sharp cutting rim 5 and a short section 7 of external screw thread, the opposite end having a removable handle 3.
  • The. shaft is bored into or through the object to be cored by clockwise rotation of the handle, the screw thread pulling the shaft into the object and the hollow shaft receiving a core of material cut out by the cutting rim. In normal use the core is removed from the borer, which is then withdrawn from the object by anticlockwise rotation.
  • a first aspect of the present invention provides an extractor device for extracting an increment borer from an object, the device comprising: a first body which has immobilising means for rotatably immobilising the first body relative to the object, and a, second body which is threadingly engaged to the first body and has securing means for releasably securing the second body to the increment borer; whereby, in use, rotation of the second body on the first body causes the second body to move away from the object in the axial direction of the borer thereby extracting the borer from,the object.
  • the borer may be extracted even when the borer does not purchase on the object.
  • threadingly engaged is meant any suitable construction by which rotational motion is converted into translational motion.
  • first body is threadingly engaged to the second body by means of complementary screw formations on the first and second bodies.
  • the first and second bodies comprise coaxial sleeve portions at which the bodies threadingly engage and which, in use, surround a portion of the borer projecting from the object.
  • the handle of the borer may need to be removed in order to slide the sleeve portions onto the shaft of the borer.
  • the immobilising means may comprise projections extending from the first body such as spikes or claws for gripping the object.
  • the projections are radially spaced from the longitudinal axis of the borer, which better prevents rotation of the first object relative to the object .
  • Alternative immobilising means may include (i) nails passing through respective holes in the first body, the nails then being driven into the object, or (ii) a belt attached to the first body which can then be tightened around the object.
  • the securing means may comprise one or more retaining screws which can be tightened onto the shaft of an increment borer.
  • the securing means may be of relatively soft material (such as plastics material) where it engages with the borer to avoid damaging the borer.
  • the securing means may comprise a chuck having a number of adjustable jaws.
  • the second body has a handle or handles which can be used to turn the second body.
  • the handles or handles of the second body can rotate the second body and pull the borer from the object.
  • the or each handle is detachably mounted to the second body (e.g. by threadingly engaging a corresponding hole in the second body) so that the handle can be dismounted from the second body when it is not needed.
  • the device comprises a number of component parts. Accordingly a further aspect of the present invention provides a kit of component parts for assembly into an extractor device according to the previous aspect.
  • the present invention further provides a method of extracting an increment borer from an object, comprising the steps of (i) providing an extractor device according to the first aspect of the present invention, (ii) rotatably immobilising the first body with respect to the object and securing the second body to the borer, and (iii) rotating the second body, whereby the second body moves away from the object in the axial direction of the borer, thereby extracting the borer from the object.
  • Figure 1 shows an increment borer
  • FIG. 2 is a side view of an extractor device embodying the present invention
  • Figure 3 is a top view of the device shown in Figure 2
  • Figure 4 is a further side view of the device shown in Fig ⁇ re
  • FIG. 5 illustrates the operation of an extractor device according to the present invention.
  • an extractor device has a rectangular base plate 9 with claws 93 extending forwardly from the corners thereof.
  • a hollow, cylindrical, inner sleeve 11 extends rearwardly from the base plate and has an external screw thread 111.
  • An outer sle.eve 13 is screwed over the end of the inner sleeve by means of a complementary internal thread 131.
  • the outer sleeve moves axially along the inner sleeve when the two sleeves are rotated relative to one another.
  • outer sleeve 13 furthest from base plate 9 are three retaining screws 15, which extend into the bore of the outer sleeve through threaded apertures 133.
  • the screws have hollow tips containing nylon plugs 151 to ensure secure contact between the screws and the shaft of an increment borer (which, as described below, in use extends through the sleeves) without causing damage to the borer.
  • the outer sleeve is longer than inner sleeve 11 so that when the outer sleeve is screwed fully along the inner sleeve up to the base plate, the retaining screws do not collide with the inner sleeve .
  • Figure 5 illustrates the mode of operation of the extractor device.
  • a borer such as that shown in Figure 1
  • threaded portion 7 of the borer penetrates a rotten portion (indicated by shading in Fig. 5) of the tree
  • the threaded portion may lose purchase on the tree so that the borer cannot be extracted (or indeed further penetrated into the tree) .
  • handle 3 of the borer is first removed from shaft 1, inner sleeve 11 and then outer sleeve 13 of the extractor device are slipped along the shaft, and the handle is replaced.
  • the device is slipped along shaft 1 until claws 93 engage the bark of the tree.
  • Outer sleeve 13 is screwed along inner sleeve 11. up to base plate 9, and retaining screws 15 are then tightened to clamp the outer sleeve onto the shaft of the borer.
  • Handle 3 of the borer is then rotated anticlockwise, i.e. in the direction which would ordinarily achieve withdrawal from the tree.
  • This causes outer sleeve 13 to rotate with respect to inner sleeve 11.
  • the inner sleeve cannot itself rotate, because claws 93 of base plate 9 are engaged with the bark of the tree.
  • the rotation causes the outer sleeve to be drawn along the inner sleeve away from the base plate, pulling the borer with it.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)

Abstract

An extractor device for extracting an increment borer (1) from an object (200) comprises: a first body (9, 11) which has immobilising means (93) for rotatably immobilising the first body (9, 11) relative to the object (200), and a second body (13) which is threadingly engaged to the first body (9, 11) and has securing means (15) for releasably securing the second body (13) to the increment borer (1).In use, rotation of the second body (13) on the first body (9, 11) causes the second body (13) to move away from the object (200) in the axial direction of the borer (1), thereby extracting the borer (1) from the object (200).

Description

EXTRACTOR DEVICE FOR EXTRACTING AN INCREMENT BORER
The present invention relates to devices for extracting increment borers from objects to be cored, kits of parts for such devices and methods of extracting increment borers from such objects.
Increment borers are simple tools used to cut cylindrical cores from objects such as trees-, telegraph poles and the- like. These cores may be used, for example, to determine the age of a tree without cutting the tree down, or to investigate whether or not a pole is rotten in the centre.
A typical increment borer, as shown in Figure 1, consists of a hollow, cylindrical, metal shaft 1, one end having a sharp cutting rim 5 and a short section 7 of external screw thread, the opposite end having a removable handle 3. The. shaft is bored into or through the object to be cored by clockwise rotation of the handle, the screw thread pulling the shaft into the object and the hollow shaft receiving a core of material cut out by the cutting rim. In normal use the core is removed from the borer, which is then withdrawn from the object by anticlockwise rotation.
• However, if the threaded portion of the shaft penetrates a rotten or hollow portion of the object, the thread may lose contact with sound material and lose its purchase. The borer cannot then be easily withdrawn. Thus there is a need for a tool to facilitate extraction of an increment borer (or a device having a similar rotational or axial sampling mode) from an object to be cored. .
Accordingly, a first aspect of the present invention provides an extractor device for extracting an increment borer from an object, the device comprising: a first body which has immobilising means for rotatably immobilising the first body relative to the object, and a, second body which is threadingly engaged to the first body and has securing means for releasably securing the second body to the increment borer; whereby, in use, rotation of the second body on the first body causes the second body to move away from the object in the axial direction of the borer thereby extracting the borer from,the object. Thus the borer may be extracted even when the borer does not purchase on the object.
By "threadingly engaged" is meant any suitable construction by which rotational motion is converted into translational motion. Typically the first body is threadingly engaged to the second body by means of complementary screw formations on the first and second bodies.
In one embodiment, the first and second bodies comprise coaxial sleeve portions at which the bodies threadingly engage and which, in use, surround a portion of the borer projecting from the object. With this embodiment, the handle of the borer may need to be removed in order to slide the sleeve portions onto the shaft of the borer.
The immobilising means may comprise projections extending from the first body such as spikes or claws for gripping the object. In a preferred embodiment the projections are radially spaced from the longitudinal axis of the borer, which better prevents rotation of the first object relative to the object . Alternative immobilising means may include (i) nails passing through respective holes in the first body, the nails then being driven into the object, or (ii) a belt attached to the first body which can then be tightened around the object.
The securing means may comprise one or more retaining screws which can be tightened onto the shaft of an increment borer. The securing means may be of relatively soft material (such as plastics material) where it engages with the borer to avoid damaging the borer.
Alternatively the securing means may comprise a chuck having a number of adjustable jaws.
In a further embodiment, the second body has a handle or handles which can be used to turn the second body. Thus if for any reason the end portion of the borer is broken off so that the borer handles cannot be used, the handles or handles of the second body can rotate the second body and pull the borer from the object. Preferably the or each handle is detachably mounted to the second body (e.g. by threadingly engaging a corresponding hole in the second body) so that the handle can be dismounted from the second body when it is not needed.
It will be appreciated that the device comprises a number of component parts. Accordingly a further aspect of the present invention provides a kit of component parts for assembly into an extractor device according to the previous aspect.
The present invention further provides a method of extracting an increment borer from an object, comprising the steps of (i) providing an extractor device according to the first aspect of the present invention, (ii) rotatably immobilising the first body with respect to the object and securing the second body to the borer, and (iii) rotating the second body, whereby the second body moves away from the object in the axial direction of the borer, thereby extracting the borer from the object.
A specific embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 shows an increment borer,
Figure 2 is a side view of an extractor device embodying the present invention,
Figure 3 is a top view of the device shown in Figure 2, Figure 4 is a further side view of the device shown in Figμre
2 , and
Figure 5 illustrates the operation of an extractor device according to the present invention.
Referring to Figures 2 to 4, an extractor device has a rectangular base plate 9 with claws 93 extending forwardly from the corners thereof. A hollow, cylindrical, inner sleeve 11 extends rearwardly from the base plate and has an external screw thread 111. An outer sle.eve 13 is screwed over the end of the inner sleeve by means of a complementary internal thread 131. Thus the outer sleeve moves axially along the inner sleeve when the two sleeves are rotated relative to one another.
At the end of outer sleeve 13 furthest from base plate 9 are three retaining screws 15, which extend into the bore of the outer sleeve through threaded apertures 133. The screws have hollow tips containing nylon plugs 151 to ensure secure contact between the screws and the shaft of an increment borer (which, as described below, in use extends through the sleeves) without causing damage to the borer. The outer sleeve is longer than inner sleeve 11 so that when the outer sleeve is screwed fully along the inner sleeve up to the base plate, the retaining screws do not collide with the inner sleeve .
Figure 5 illustrates the mode of operation of the extractor device. When a borer (such as that shown in Figure 1) is bored into a tree 200 and threaded portion 7 of the borer penetrates a rotten portion (indicated by shading in Fig. 5) of the tree, the threaded portion may lose purchase on the tree so that the borer cannot be extracted (or indeed further penetrated into the tree) . To extract the borer using the extractor device, handle 3 of the borer is first removed from shaft 1, inner sleeve 11 and then outer sleeve 13 of the extractor device are slipped along the shaft, and the handle is replaced.
The device is slipped along shaft 1 until claws 93 engage the bark of the tree. Outer sleeve 13 is screwed along inner sleeve 11. up to base plate 9, and retaining screws 15 are then tightened to clamp the outer sleeve onto the shaft of the borer.
Handle 3 of the borer is then rotated anticlockwise, i.e. in the direction which would ordinarily achieve withdrawal from the tree. This causes outer sleeve 13 to rotate with respect to inner sleeve 11. The inner sleeve cannot itself rotate, because claws 93 of base plate 9 are engaged with the bark of the tree. Thus the rotation causes the outer sleeve to be drawn along the inner sleeve away from the base plate, pulling the borer with it.
When thread 7 on the borer shaft re-engages with sound wood, the borer continues to withdraw from the tree by virtue of its own screw thread, and base plate 9 then disengages from the trunk. Once the borer is completely withdrawn from the tree, the extractor device can be slipped off the threaded end of the borer shaft simply by loosening clamping screws 15.

Claims

CLAIMS ;
1. An extractor device for extracting an increment borer from an object, the device comprising: a first body which has immobilising means for rotatably immobilising the first body relative to the object, and a second body which is threadingly engaged to the first . body and has securing means for releasably securing the second body to the increment borer; whereby, in use, rotation of the second body on the first body causes the second body to move away from the object in the axial direction of the borer, thereby extracting the borer from the object.
2. An extractor device according to claim 1, wherein the second body is engaged to the first body by means of complementary screw formations.
3. An extractor device according to claim 1 or claim 2 wherein the first and second bodies are threadingly engaged at respective coaxial sleeve portions which, in use, surround a portion of the borer projecting from the object.
. An extractor device according to. any one of claims 1 to 3 wherein the immobilising' means comprises projections for gripping the object.
5. An extractor device according to claim 4 wherein the projections are radially spaced from the axis of the borer.
6. An extractor device according to any one of claims 1 to 5 wherein the securing means comprises one or more retaining screws .
7. An extractor device according to any one of claims 1 to 6 having an increment borer secured at the securing means .
8. A kit of parts for assembly into an extractor device according to any one of the preceding claims
'9. A method of extracting an increment borer from an object comprising the steps of: providing the extractor device of any one of claims 1 to 6, rotatably immobilising the first body relative to the object and securing the second body to the borer, and rotating the second body, whereby the second body moves away from the object in the axial direction of the borer thereby extracting the borer from the object.'
PCT/GB2002/002137 2001-05-09 2002-05-08 Extractor device for extracting an increment borer WO2002090936A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0111293A GB0111293D0 (en) 2001-05-09 2001-05-09 Extractor device
GB0111293.7 2001-05-09

Publications (1)

Publication Number Publication Date
WO2002090936A1 true WO2002090936A1 (en) 2002-11-14

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ID=9914271

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/002137 WO2002090936A1 (en) 2001-05-09 2002-05-08 Extractor device for extracting an increment borer

Country Status (2)

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GB (1) GB0111293D0 (en)
WO (1) WO2002090936A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2474330A (en) * 2009-10-07 2011-04-13 Neil James Loader An increment borer extractor including a chuck
KR101386307B1 (en) * 2009-09-15 2014-04-17 현대중공업 주식회사 Jig for outlet line during pipe flushing of engine lubrication oil
DE102014015051B3 (en) * 2014-10-15 2015-10-22 Iml Instrumenta Mechanik Labor Gmbh Wood testing tool and method for visually inspecting a wooden object

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1458076A (en) * 1922-06-03 1923-06-05 Clifton W Potts Extracting device
US3110184A (en) * 1961-05-04 1963-11-12 Stanley A Gruetzman Wood core sample cutter
US6019551A (en) * 1997-09-23 2000-02-01 Internatioal Paper Company Extracting system and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1458076A (en) * 1922-06-03 1923-06-05 Clifton W Potts Extracting device
US3110184A (en) * 1961-05-04 1963-11-12 Stanley A Gruetzman Wood core sample cutter
US6019551A (en) * 1997-09-23 2000-02-01 Internatioal Paper Company Extracting system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101386307B1 (en) * 2009-09-15 2014-04-17 현대중공업 주식회사 Jig for outlet line during pipe flushing of engine lubrication oil
GB2474330A (en) * 2009-10-07 2011-04-13 Neil James Loader An increment borer extractor including a chuck
DE102014015051B3 (en) * 2014-10-15 2015-10-22 Iml Instrumenta Mechanik Labor Gmbh Wood testing tool and method for visually inspecting a wooden object

Also Published As

Publication number Publication date
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