WO2000015024A1 - Improvements relating to cutting apparatus - Google Patents
Improvements relating to cutting apparatus Download PDFInfo
- Publication number
- WO2000015024A1 WO2000015024A1 PCT/GB1999/002929 GB9902929W WO0015024A1 WO 2000015024 A1 WO2000015024 A1 WO 2000015024A1 GB 9902929 W GB9902929 W GB 9902929W WO 0015024 A1 WO0015024 A1 WO 0015024A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- rotation
- cutting
- blades
- fixed
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
- A01G3/047—Apparatus for trimming hedges, e.g. hedge shears portable
- A01G3/053—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven
- A01G3/0535—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven with rotatable knives
Definitions
- the present invention relates to a cutting apparatus.
- the present invention relates to a cutting apparatus of
- the rotary type comprising a stationary or fixed cutting blade and a movable
- Such rotary cutting apparatus is suitable for use in the hedge cutting
- cutting apparatus such as, for example, rotary cutting head electric razors.
- a cutting apparatus comprising at least one fixed cutting blade having a cutting edge which extends generally radially from an axis of rotation, and at least one movable blade which is mounted to be rotatable about the axis of rotation, said at least one movable blade and/or said at least one fixed cutting blade having an arcuate cutting edge which extends outwardly from the axis of rotation and which is concave in the direction of the other of said blades.
- a cutting apparatus comprising at least one fixed cutting blade having a
- said at least one movable blade having an arcuate cutting edge
- either or both of the fixed and movable cutting blades is flexible. This can be effected by the blades being resiliently mounted or by the section of the blades
- the fixed blade is rigidly mounted with a rigid cutting edge
- the blades are spring loaded together so that in the absence of any load they press against each other as the movable blade rotates.
- each blade preferably has two parallel planar surfaces with the
- the chamfered edges of the respective blades may be
- blade is pe ⁇ endicular to the axis of the material to be cut and parallel to the
- angled outer surfaces of the respective blades are preferably
- each fixed blade being formed so as to gently curve in the direction of the axis of rotation, and being secured to a first annular
- said elongate shaft may be
- Fig. 1 is a perspective view of the outside of a preferred embodiment of
- Fig. 2 is an axial elevational view of the inside of the embodiment of
- Fig. 3 is a diagrammatic partial view of the fixed blade arrangement of
- Fig. 4 is a diagrammatic illustration of the mode of operation of the
- Fig. 5 is a diagrammatic cross-sectional view of the bearing connection
- Fig. 5a diagrammatically illustrates a cross-section of a modified
- Fig. 6 is a diagrammatic illustration of the cutting blade
- Fig. 7 is a diagrammatic partial view of a modified construction in which
- the fixed blades have a concave cutting edge and the movable blades have a
- Fig. 8 is a diagrammatic illustration of an alternative cutting blade
- Fig. 9 is a diagrammatic illustration of a further alternative cutting blade interengagement.
- the fixed cutting blades 1 extend generally radially from a central hub 5
- blades 1 are equi-angularly spaced apart from each other, around the central hub
- each fixed blade being secured to a first annular member 9, to form a crown-
- blade assembly 11 is secured to, or integrally formed with, a drive guard 13
- the two movable blades 3 are mounted for rotation in the central hub 5 ,
- the movable blades 3 extend from the central hub 5 ,
- blade 3 comprises a fixed section 15 and a cutting edge section 17, with the
- cutting edge section 17 being secured to the fixed section 15 by two resiliently
- each movable blade 3 is resiliently movable, the pu ⁇ ose for which is described hereinbelow. Further whilst the radially inner end of the
- each fixed section 15 is secured to a further annular
- FIG. 3 of the accompanying drawings illustrates the rigid attachment of each fixed blade 1 to the central hub 5 by a single bolt 27 and the rigid
- Fig. 4 diagrammatically illustrating the mode of operation of the blades 1 and 3.
- Fig. 5 of the accompanying drawings is a diagrammatic cross sectional
- blades 1 carries a thrust bearing in the form of a ball race 33 which rotatably
- the shaft 35 is threaded as at 37 and can, when installed in, for example, a
- the shaft 35 can be connected to a drive motor.
- the movable blades are of
- FIG. 5a providing a region of axial splines 45 on one end region of a section of the shaft 35, which splined
- region 45 is axially movable in a bearing 47 against a spring 49, which bearing
- each fixed blade 1 has a cutting edge 2 which extends radially from the central hub 5.
- each movable blade 3 is arcuate and curves
- the fixed blades also have a
- the blades 1, 3 are so arranged that the
- acutely chamfered edges 41, 43 are spring biassed together, enhancing cutting
- the planar surfaces 39 are at an angle to the said surface of
- angled outer surfaces 39 of the respective blades 1 , 3 are contained in a blade support (not shown) which is part of the screw impeller (not shown) previously mentioned, whereby cut material is transported from the cutting apparatus in one continuous movement.
- the chamfered edges 41,43 of the respective blades 3,1 may be arranged such that the planar surface 41 of the chamfered edge of the movable blade 3 is pe ⁇ endicular to the axis of the material to be cut and parallel to the side face 39 of the fixed blade 1 commencing at the apex or cutting edge 2 of the blade 1, with the chamfered surface 41 of the movable blade 3 sliding over the said side face 39 of the fixed blade 1 during a cutting action.
- the present invention thus provides a simple though advantageous cutting apparatus for use in a variety of situations such as, for example, hedge cutting and shaving.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Environmental Sciences (AREA)
- Milling, Drilling, And Turning Of Wood (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU56406/99A AU5640699A (en) | 1998-09-11 | 1999-09-03 | Improvements relating to cutting apparatus |
EP99943129A EP1111988A1 (en) | 1998-09-11 | 1999-09-03 | Improvements relating to cutting apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9819704.9A GB9819704D0 (en) | 1998-09-11 | 1998-09-11 | Improvements relating to cutting apparatus |
GB9819704.9 | 1998-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000015024A1 true WO2000015024A1 (en) | 2000-03-23 |
Family
ID=10838616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/002929 WO2000015024A1 (en) | 1998-09-11 | 1999-09-03 | Improvements relating to cutting apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1111988A1 (en) |
AU (1) | AU5640699A (en) |
GB (1) | GB9819704D0 (en) |
WO (1) | WO2000015024A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1036818C2 (en) * | 2009-04-06 | 2010-10-07 | Vuicon Engineering B V | CUTTING DEVICE FOR CUTTING A BUSH OR THE LIKE METHOD THEREFORE. |
NL2005458C2 (en) * | 2010-10-05 | 2012-04-06 | Antonius Godefridus Maria Cornelis Lommers | CUTTING HEAD FOR A CUTTING DEVICE FOR CUTTING PLANTS. |
US10343296B2 (en) | 2015-07-25 | 2019-07-09 | Bettcher Industries, Inc. | Power operated rotary knife with notched rotary knife blade and trim guide |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109089597A (en) * | 2018-08-09 | 2018-12-28 | 徐州市铜山区汉王旅游开发有限公司 | A kind of tourist attraction tree trimming device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1453434A (en) * | 1965-08-05 | 1966-06-03 | Rotary knife machine for pruning and pruning plants | |
DE2044063A1 (en) * | 1969-10-08 | 1971-04-15 | Gregory, Geoffrey, Chalfont St Gi les, Buckinghamshire (Großbritannien) | Power tool with accessories |
GB2266648A (en) | 1992-05-09 | 1993-11-10 | Graham John Wilson | Garden cutting tools. |
-
1998
- 1998-09-11 GB GBGB9819704.9A patent/GB9819704D0/en not_active Ceased
-
1999
- 1999-09-03 EP EP99943129A patent/EP1111988A1/en not_active Withdrawn
- 1999-09-03 AU AU56406/99A patent/AU5640699A/en not_active Abandoned
- 1999-09-03 WO PCT/GB1999/002929 patent/WO2000015024A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1453434A (en) * | 1965-08-05 | 1966-06-03 | Rotary knife machine for pruning and pruning plants | |
DE2044063A1 (en) * | 1969-10-08 | 1971-04-15 | Gregory, Geoffrey, Chalfont St Gi les, Buckinghamshire (Großbritannien) | Power tool with accessories |
GB2266648A (en) | 1992-05-09 | 1993-11-10 | Graham John Wilson | Garden cutting tools. |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1036818C2 (en) * | 2009-04-06 | 2010-10-07 | Vuicon Engineering B V | CUTTING DEVICE FOR CUTTING A BUSH OR THE LIKE METHOD THEREFORE. |
NL2005458C2 (en) * | 2010-10-05 | 2012-04-06 | Antonius Godefridus Maria Cornelis Lommers | CUTTING HEAD FOR A CUTTING DEVICE FOR CUTTING PLANTS. |
WO2012047101A1 (en) * | 2010-10-05 | 2012-04-12 | Antonius Godefridus Maria Cornelis Lommers | Trimming head for a trimming device for trimming excess vegetation from plants |
US10343296B2 (en) | 2015-07-25 | 2019-07-09 | Bettcher Industries, Inc. | Power operated rotary knife with notched rotary knife blade and trim guide |
US10583577B2 (en) | 2015-07-25 | 2020-03-10 | Bettcher Industries, Inc. | Power operated rotary knife with notched rotary knife blade and trim guide |
US11654589B2 (en) | 2015-07-25 | 2023-05-23 | Bettcher Industries, Inc. | Power operated rotary knife with notched rotary knife blade and trim guide |
Also Published As
Publication number | Publication date |
---|---|
AU5640699A (en) | 2000-04-03 |
GB9819704D0 (en) | 1998-11-04 |
EP1111988A1 (en) | 2001-07-04 |
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