CA1170891A - Manually operable device for loosening, cutting and crumbling garden soil - Google Patents
Manually operable device for loosening, cutting and crumbling garden soilInfo
- Publication number
- CA1170891A CA1170891A CA000391529A CA391529A CA1170891A CA 1170891 A CA1170891 A CA 1170891A CA 000391529 A CA000391529 A CA 000391529A CA 391529 A CA391529 A CA 391529A CA 1170891 A CA1170891 A CA 1170891A
- Authority
- CA
- Canada
- Prior art keywords
- bearing
- axle
- central
- arrangements
- hand tool
- 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.)
- Expired
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
-
- 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
- A01B1/06—Hoes; Hand cultivators
- A01B1/14—Hoes; Hand cultivators with teeth only
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Soil Working Implements (AREA)
- Handcart (AREA)
Abstract
ABSTRACT
MANUALLY OPERABLE DEVICE FOR LOOSENING, CUTTING
AND CRUMBLING GARDEN SOIL
In a garden hand tool for loosening, cutting and crumbling garden soil or the like, comprising freely rotatable prong arrangements (17) in star-like formation which are arranged to face one another to form a "V" and the edges of which intersect one another because of the interengagement of the prong arrangements (17), thus forming cutting locations, these prong arrangements (17) are freely rotatably mounted on a bearing sleeve (12) and attached to a central axle (11) by means of a central aperture (12a). Between each bearing sleeve (12) which is slipped on the axle (11), a guide bearing (13) is also slipped over and clamped to the end of the axle (11) by means of an end bearing (14) and a nut (15). In such a case, the central apertures (12a) formed in the bearing sleeves (12) are disposed at an acute angle (at an inclination) relative to the external bearing surface so as to correspond to the inclined position of the prong arrangements (17).
A reinforcing plate (22) is mounted in the centre of the axle (11), and an intermediate guide bearing (10a) is formed around the reinforcing plate (22), the guide bearing (10a) being made of plastics material and leads to a shaft socket (20) for accommodating a shaft (10).
MANUALLY OPERABLE DEVICE FOR LOOSENING, CUTTING
AND CRUMBLING GARDEN SOIL
In a garden hand tool for loosening, cutting and crumbling garden soil or the like, comprising freely rotatable prong arrangements (17) in star-like formation which are arranged to face one another to form a "V" and the edges of which intersect one another because of the interengagement of the prong arrangements (17), thus forming cutting locations, these prong arrangements (17) are freely rotatably mounted on a bearing sleeve (12) and attached to a central axle (11) by means of a central aperture (12a). Between each bearing sleeve (12) which is slipped on the axle (11), a guide bearing (13) is also slipped over and clamped to the end of the axle (11) by means of an end bearing (14) and a nut (15). In such a case, the central apertures (12a) formed in the bearing sleeves (12) are disposed at an acute angle (at an inclination) relative to the external bearing surface so as to correspond to the inclined position of the prong arrangements (17).
A reinforcing plate (22) is mounted in the centre of the axle (11), and an intermediate guide bearing (10a) is formed around the reinforcing plate (22), the guide bearing (10a) being made of plastics material and leads to a shaft socket (20) for accommodating a shaft (10).
Description
~ 1~089 1 UALLY OPERA3LE DEVICE ~OR LOOSENING~ CUI~I~G
A~3 CR~MBLING GA~DEN SOIL
.
The present invention relates to a manually operable tool or device for loosening" cutting and crumbling garden soil.
DESC~IP~IO~ OF PRIOR A~
US PS 3 605 907 already discloses a manually operable tool of this -~pe having freely rotating prongs in star-like arrangement and disposed on bearing axles which face one another in the form of a "V". The central radial planes of these prong stars, which have preferably a diamond-shaped cross-section and laterally located cutting edges on each prong, intersect one another at an aCute angle so that the edges~ which slide along each other, of the crosswisely interengaging prongs form cutting locations.
Such an arrangement has substantial advantages with re~ard to the breaking-up of clods and also has an advantageous self-cleaning action as a result of the scissor-like ~ovement~
SUM~ Y OF THE INVENTION
_ me present invention seeks to further improve these known advantageous manually operable devices, wherein -two prong stars rotate freely on each a~ailable shaft~ such an improvement~
inter alia~ reducing the risk of corrosion and the number of shafts as well as improving the bearing guidance of the prong stars and their interchangeability.
This object is achieved~ with a hand tool of the above-mentioned type, in that two or more bearing sleeveq, which carry the star-like prong arrangements and guide bearings9 wllich are disposed therebetween and are made of plastics material~
q~
89~
A~3 CR~MBLING GA~DEN SOIL
.
The present invention relates to a manually operable tool or device for loosening" cutting and crumbling garden soil.
DESC~IP~IO~ OF PRIOR A~
US PS 3 605 907 already discloses a manually operable tool of this -~pe having freely rotating prongs in star-like arrangement and disposed on bearing axles which face one another in the form of a "V". The central radial planes of these prong stars, which have preferably a diamond-shaped cross-section and laterally located cutting edges on each prong, intersect one another at an aCute angle so that the edges~ which slide along each other, of the crosswisely interengaging prongs form cutting locations.
Such an arrangement has substantial advantages with re~ard to the breaking-up of clods and also has an advantageous self-cleaning action as a result of the scissor-like ~ovement~
SUM~ Y OF THE INVENTION
_ me present invention seeks to further improve these known advantageous manually operable devices, wherein -two prong stars rotate freely on each a~ailable shaft~ such an improvement~
inter alia~ reducing the risk of corrosion and the number of shafts as well as improving the bearing guidance of the prong stars and their interchangeability.
This object is achieved~ with a hand tool of the above-mentioned type, in that two or more bearing sleeveq, which carry the star-like prong arrangements and guide bearings9 wllich are disposed therebetween and are made of plastics material~
q~
89~
- 2 -are detachably mounted on a contiruous~ straight, central axle so as to be non-rotatable and displaceable in the longitudinal direction of the axleO
~hus according to the present invention there is provided in a hand tool for loosening9 cutting and crumbling garden soil or the like, comprising a continuous, straight, central axle; at leasttwo pronged wheel arrangements detachably mounted~via at least two bearing sleeves, on the central bearing axle to be freely rotatable and mounted facing one another to form V-like arrangements~ with each said bearing sleeve carrying one of said pronged wheel arrangements;
and guide bearings disposed between the bearing sleeves and made of plastics material, said bearing sleeves and guide bearings being detachably mounted on said central axle so as to be non-rotatable and displaceable in the longitudinal direction of the axle: and wherein the central radial planes of the pronged wheel arrangements intersect one another at an acute angle so that the edges of the crosswisely interengaging pronged wheel arrangements which slide along each other, form cutting locations.
~he advantage of such an arrangement is that, when several pairs of bearing axles are provided, the number of metal guide bearing members is reduced and so is the risk of corrosion. These advantages may be further increased if, according to a preferred embodiment of the invention, the bearing sleeves carrying star-like prong arrangements are made of plastics material - the star arrangements being freely rotatably mounted on said bearing sleeves by means of inserted sliding ;~ ~7V8~ 1 bearing rings made of self-lubricating plastics materi~l or the like.
~ecause the bearing sleeves and the intermediate guide bearings are displaceably mounted on the central axle, they may easily be removed from the axle in order to replace prong arrangements or bearing members~ and be slipped on again. In such a case, it is preferable, according to the invention, to clamp or tighten the displaceable bearing members (bea~ing sleeves, inte~mediate guide bearings) one relative to the other by means of clamping or tightening nuts screwed onto their ends~ so that the bearing members form~ on the central a~e~ a rigid unit which is disposed on one shaft.
It is preferable to make the external surface of the bearing sleeve discontinuous by means of annular collecting channels and discharge conduits disposed at right angles thereto, in order to discharge to the outside the precipitating material, such as sand or the like, when the star prong arrangements are inserted into the soil~
The whole ass~mbly of such manually operable devices~ from the point of view of manufacture~ can be accomplished rapidly and easily~ so that a rational manufacture is provided.
Further details and embodiments are found in the sub-claims.
I~e invention extends not only to the individual features, but also to combinations thereof.
~RIEF DESC~IPTION OF ~HE DRA~I~GS
Ihe invention will be described further, by way of exa~ple, wi~h ~ 17~8~1 reference to the accompanying drawings in which:-Fig. 1 is a side view of a hand tool having a shaft, shown in vertical section,and star-like pronged wheel arrangements mounted thereon;
Fig. 2 is a horizontal section through the same shaft and through several pairs of pronged arrangements, the bearings of which face one another to form "~' arrangemen-ts and are disposed on a central axle;
Fig. 3 is an exploded view showing bearings and intermediate guide bearings with a receiver bore formed therein or the central axle3 Fig. 4 is a cross-æectional view of a modified, round axle and a bearing slee~e attached thereto by a tongue and groove joint;
Fig. 5 is a perspective view of a modified bearing sleeve having grooves formed in the surface; and Fig. 6 is a vertical section through the bearing sleeve of Fig. 5.
DESCRIPTION OF rrHE PRE~ERRED EMBODDMENrrS
A central axle 11 of square croæs~section is secured to a shaft 10 by9 for example, being welded theretoO Bearing sleeves 12, made of hard plastics material, face one another to form a "V" dispo6ition and are arranged in pairs at corresponding angles (acute angles~, the bearing slee~es 12 being slipped onto this central axle and having inserted therebetween guide bearings 13 which are also made of hard plastics material and the side faces of which also lie 1 1~08~1 opposite one another in the form of a "V" and fully abut the side faces of the bearing sleeves 12. ~he side faces of the guide bearings 13 have small indentations therefor.
Central apertures 12a formed in the bearing sleeves 12 and guide bearings 13, as well as end bearings 14, are also of an angular or square construction to correspond to the square shape of the central axle 11 (rectangular)~ so that these be æ ing members 12, 13 and 14 are in fact displaceable ~n the longitudinal direction of the central axle 11, but they æe non-rotatably mounted on the central axle 11. ~he above-mentioned bearing members 12~ 13, 14 are clamped together to form a substantially rigid unit by means of end nuts 15 which are rotatably mounted on end threads 16 of the central axle llo In such a case, the externRl side faces of the end beari~gs 14 each abut the respeGtive end nuts 15 at right angles.
Freel~v rotatable pronged wheels or star-like prong arrangements 17~ made, for example, of a lightweight metal such as aluminium, are each diamond-shaped in cross-section and are provided with lateral cutting edges 17a. ~he star arrangements 17 are mounted 60 as to face one another on the bearing sleeves 12 in such a manner that they engage unilaterally in one another so as to slide on one another in a crosswise manner and thereby form pairs of advantageous cutting a~rangements. ~he cutting arrangements lie opposite one another in an alternately offset manner with adjacent prong arrangements 17 (cf. ~igo 2)o 8~1 For this purpose~ e~ery star arrangement 17 has a central bore 18, into which a slidable bearing ring 19, e.g. made of self-lubricating plastics material, is firmly inserted - the slidable bearing ring 19 being freely rotatably mounted on the round external surface of the be~ring sleeve 12.
~ he guide bearings 13 are provided, on their wider external face, with a trough 13b which, on the one hand, forms a guide face for grass or the like and, on the other hand~ substantially prevents grass or the like from directly entering the gaps between the guide bearing 13 and bearing 12; this therefore prevents the star arrangements 17 from becoming clogged-up.
The provision of the prong arrangements 17 with their bearings 12 on the central axle 11 provides the hand tool with an advantageous rigidity - especially also if a compacted soil is bein~ worked.
Ihe individual bearing members 12, 13, 14~ as well as the prong arrangements 17~ can be easily assembled a~d dismantled again, since the end screws 15 facilitate the attachment and clamping together of the individual members and their dismantling. The bearing members are prevented from rotating~ while the prong arrangements 17 slide with the bearing sleeves 12 and slidable bearing ring 19 ~ plastics material on plastics material~
Ihe shaft 10, preferably made of a hard plastics material~ has with its handle shaft socket 20, a longitudinal ~ 70~91 flat cavity 21 in its longitudinal direction on the axle side - a reinforcing plate 22 made of metal being inserted into this cavity 21 and being provided with central bores 23 for the formation of a plastics material bridge. ~he central ~Yle 11 is rigidly connected to this reinforcing plate 23 by being welded on the end so that the shaft and axle 11 form a non-detachable unit.
The hand tool may be manufactured and assembled, for example, so that the reinforcing plate 22 is first welded~ screwed or similarly attached in the middle of the central axle 11. ~he coating of plastics material forms an intermediate guide bearing lOa9 which is V-shaped in cross-section, and is then sprayed both around the central axle 11 and around the reinforcing plate~ whereby a handle shaft socket 20 iB formed and the fluid plastics material flows through the bores 23 and forms bridges 24 therein to reinforce and advantageously secure in position the coating of plastics material and the reinforcing plate 22.
~he bearing members (bear:Lng sleeves 12 with the attached prong arrangements 17~ inte~nediate guide bearings 13, end bearings 14) are then slipped on from each side and clamped together and relative to one another at their ends by means of tightening nuts 15 on the threads 16 (cf. Fig. 3).
The essential members of the hand tool are generally made of plastics material in oxder to eliminate a corrosive metalO
~ 170~91 ~ 8 -It therefore lie~ within the scope of the invention to manufacture the central axle 11 and the prong st~s 17 from robust~ hard plastics material also.
Instead of the many-sided central axle 11, a round axle 25 is provided in the embodiment shown in ~ig. 4 of the drawing, the round axle 25 having a groove 26 formed therein which extends over its entire length.
In such embodiment, the pertinent central aperture 12a is provided with a web or tongue 27 so that the bearing sleeve 12~ the guide bearing 13 and the end bearing 14 are prevented from rotating with the axle 25 by means of a groove and tongue joint.
Instead of the groove 26, a web, cam or the like may also be disposed on the round axle 25~ whereby an appropriate recess is formed in each respective central aperture 12a and the members 12, 13, 14 are prevented from rotating on the round axle 25.
In order to be ab~e to deflect sand or the like precipitating between the sli.ding ring 19 and the bearing sleeve 12 as the soil is being prepared and in order to reduce the friction thereby~ the surface of the bearing sleeve 12 is interrupted by annular collecting channels 28, grooves or the like~ in which the sand is collected by the frictional face during the rotational movement of the prong arrangements 17, see Figs. 5 ~nd 6.
1 1708gl These annular collecting channels 28 discharge into discharge conduits 29 which are disposed at right angles to the collecting channels 28 and are distributed over the periphery of the bearing sleeves 12. ~our discharge conduits 29 are provided in the embodLment. The sand or the like, which has started to collect in the collecting channels 28 is conducted to the outside by means of the discharge conduits 29.
A bearing sleeve which is designed in this manner there~ore reduces the friction of the rotatin~ prong arrange-ments and this has a favourable advantageous effect upon the operation and the service-life of the pronged wheels.
~hus according to the present invention there is provided in a hand tool for loosening9 cutting and crumbling garden soil or the like, comprising a continuous, straight, central axle; at leasttwo pronged wheel arrangements detachably mounted~via at least two bearing sleeves, on the central bearing axle to be freely rotatable and mounted facing one another to form V-like arrangements~ with each said bearing sleeve carrying one of said pronged wheel arrangements;
and guide bearings disposed between the bearing sleeves and made of plastics material, said bearing sleeves and guide bearings being detachably mounted on said central axle so as to be non-rotatable and displaceable in the longitudinal direction of the axle: and wherein the central radial planes of the pronged wheel arrangements intersect one another at an acute angle so that the edges of the crosswisely interengaging pronged wheel arrangements which slide along each other, form cutting locations.
~he advantage of such an arrangement is that, when several pairs of bearing axles are provided, the number of metal guide bearing members is reduced and so is the risk of corrosion. These advantages may be further increased if, according to a preferred embodiment of the invention, the bearing sleeves carrying star-like prong arrangements are made of plastics material - the star arrangements being freely rotatably mounted on said bearing sleeves by means of inserted sliding ;~ ~7V8~ 1 bearing rings made of self-lubricating plastics materi~l or the like.
~ecause the bearing sleeves and the intermediate guide bearings are displaceably mounted on the central axle, they may easily be removed from the axle in order to replace prong arrangements or bearing members~ and be slipped on again. In such a case, it is preferable, according to the invention, to clamp or tighten the displaceable bearing members (bea~ing sleeves, inte~mediate guide bearings) one relative to the other by means of clamping or tightening nuts screwed onto their ends~ so that the bearing members form~ on the central a~e~ a rigid unit which is disposed on one shaft.
It is preferable to make the external surface of the bearing sleeve discontinuous by means of annular collecting channels and discharge conduits disposed at right angles thereto, in order to discharge to the outside the precipitating material, such as sand or the like, when the star prong arrangements are inserted into the soil~
The whole ass~mbly of such manually operable devices~ from the point of view of manufacture~ can be accomplished rapidly and easily~ so that a rational manufacture is provided.
Further details and embodiments are found in the sub-claims.
I~e invention extends not only to the individual features, but also to combinations thereof.
~RIEF DESC~IPTION OF ~HE DRA~I~GS
Ihe invention will be described further, by way of exa~ple, wi~h ~ 17~8~1 reference to the accompanying drawings in which:-Fig. 1 is a side view of a hand tool having a shaft, shown in vertical section,and star-like pronged wheel arrangements mounted thereon;
Fig. 2 is a horizontal section through the same shaft and through several pairs of pronged arrangements, the bearings of which face one another to form "~' arrangemen-ts and are disposed on a central axle;
Fig. 3 is an exploded view showing bearings and intermediate guide bearings with a receiver bore formed therein or the central axle3 Fig. 4 is a cross-æectional view of a modified, round axle and a bearing slee~e attached thereto by a tongue and groove joint;
Fig. 5 is a perspective view of a modified bearing sleeve having grooves formed in the surface; and Fig. 6 is a vertical section through the bearing sleeve of Fig. 5.
DESCRIPTION OF rrHE PRE~ERRED EMBODDMENrrS
A central axle 11 of square croæs~section is secured to a shaft 10 by9 for example, being welded theretoO Bearing sleeves 12, made of hard plastics material, face one another to form a "V" dispo6ition and are arranged in pairs at corresponding angles (acute angles~, the bearing slee~es 12 being slipped onto this central axle and having inserted therebetween guide bearings 13 which are also made of hard plastics material and the side faces of which also lie 1 1~08~1 opposite one another in the form of a "V" and fully abut the side faces of the bearing sleeves 12. ~he side faces of the guide bearings 13 have small indentations therefor.
Central apertures 12a formed in the bearing sleeves 12 and guide bearings 13, as well as end bearings 14, are also of an angular or square construction to correspond to the square shape of the central axle 11 (rectangular)~ so that these be æ ing members 12, 13 and 14 are in fact displaceable ~n the longitudinal direction of the central axle 11, but they æe non-rotatably mounted on the central axle 11. ~he above-mentioned bearing members 12~ 13, 14 are clamped together to form a substantially rigid unit by means of end nuts 15 which are rotatably mounted on end threads 16 of the central axle llo In such a case, the externRl side faces of the end beari~gs 14 each abut the respeGtive end nuts 15 at right angles.
Freel~v rotatable pronged wheels or star-like prong arrangements 17~ made, for example, of a lightweight metal such as aluminium, are each diamond-shaped in cross-section and are provided with lateral cutting edges 17a. ~he star arrangements 17 are mounted 60 as to face one another on the bearing sleeves 12 in such a manner that they engage unilaterally in one another so as to slide on one another in a crosswise manner and thereby form pairs of advantageous cutting a~rangements. ~he cutting arrangements lie opposite one another in an alternately offset manner with adjacent prong arrangements 17 (cf. ~igo 2)o 8~1 For this purpose~ e~ery star arrangement 17 has a central bore 18, into which a slidable bearing ring 19, e.g. made of self-lubricating plastics material, is firmly inserted - the slidable bearing ring 19 being freely rotatably mounted on the round external surface of the be~ring sleeve 12.
~ he guide bearings 13 are provided, on their wider external face, with a trough 13b which, on the one hand, forms a guide face for grass or the like and, on the other hand~ substantially prevents grass or the like from directly entering the gaps between the guide bearing 13 and bearing 12; this therefore prevents the star arrangements 17 from becoming clogged-up.
The provision of the prong arrangements 17 with their bearings 12 on the central axle 11 provides the hand tool with an advantageous rigidity - especially also if a compacted soil is bein~ worked.
Ihe individual bearing members 12, 13, 14~ as well as the prong arrangements 17~ can be easily assembled a~d dismantled again, since the end screws 15 facilitate the attachment and clamping together of the individual members and their dismantling. The bearing members are prevented from rotating~ while the prong arrangements 17 slide with the bearing sleeves 12 and slidable bearing ring 19 ~ plastics material on plastics material~
Ihe shaft 10, preferably made of a hard plastics material~ has with its handle shaft socket 20, a longitudinal ~ 70~91 flat cavity 21 in its longitudinal direction on the axle side - a reinforcing plate 22 made of metal being inserted into this cavity 21 and being provided with central bores 23 for the formation of a plastics material bridge. ~he central ~Yle 11 is rigidly connected to this reinforcing plate 23 by being welded on the end so that the shaft and axle 11 form a non-detachable unit.
The hand tool may be manufactured and assembled, for example, so that the reinforcing plate 22 is first welded~ screwed or similarly attached in the middle of the central axle 11. ~he coating of plastics material forms an intermediate guide bearing lOa9 which is V-shaped in cross-section, and is then sprayed both around the central axle 11 and around the reinforcing plate~ whereby a handle shaft socket 20 iB formed and the fluid plastics material flows through the bores 23 and forms bridges 24 therein to reinforce and advantageously secure in position the coating of plastics material and the reinforcing plate 22.
~he bearing members (bear:Lng sleeves 12 with the attached prong arrangements 17~ inte~nediate guide bearings 13, end bearings 14) are then slipped on from each side and clamped together and relative to one another at their ends by means of tightening nuts 15 on the threads 16 (cf. Fig. 3).
The essential members of the hand tool are generally made of plastics material in oxder to eliminate a corrosive metalO
~ 170~91 ~ 8 -It therefore lie~ within the scope of the invention to manufacture the central axle 11 and the prong st~s 17 from robust~ hard plastics material also.
Instead of the many-sided central axle 11, a round axle 25 is provided in the embodiment shown in ~ig. 4 of the drawing, the round axle 25 having a groove 26 formed therein which extends over its entire length.
In such embodiment, the pertinent central aperture 12a is provided with a web or tongue 27 so that the bearing sleeve 12~ the guide bearing 13 and the end bearing 14 are prevented from rotating with the axle 25 by means of a groove and tongue joint.
Instead of the groove 26, a web, cam or the like may also be disposed on the round axle 25~ whereby an appropriate recess is formed in each respective central aperture 12a and the members 12, 13, 14 are prevented from rotating on the round axle 25.
In order to be ab~e to deflect sand or the like precipitating between the sli.ding ring 19 and the bearing sleeve 12 as the soil is being prepared and in order to reduce the friction thereby~ the surface of the bearing sleeve 12 is interrupted by annular collecting channels 28, grooves or the like~ in which the sand is collected by the frictional face during the rotational movement of the prong arrangements 17, see Figs. 5 ~nd 6.
1 1708gl These annular collecting channels 28 discharge into discharge conduits 29 which are disposed at right angles to the collecting channels 28 and are distributed over the periphery of the bearing sleeves 12. ~our discharge conduits 29 are provided in the embodLment. The sand or the like, which has started to collect in the collecting channels 28 is conducted to the outside by means of the discharge conduits 29.
A bearing sleeve which is designed in this manner there~ore reduces the friction of the rotatin~ prong arrange-ments and this has a favourable advantageous effect upon the operation and the service-life of the pronged wheels.
Claims (6)
1. A hand tool for loosening, cutting and crumbling soil or the like, comprising: a continuous, straight, central bearing axle of an angular construction, at least two pronged wheel arrangements having a central bore therein, a bearing sleeve detachably mounting each of said pronged wheel arrange-ments on the central bearing axle, to be freely rotatable and mounted facing one another to form V-like arrangements, a slidable bearing ring made of self-lubricating plastic material carried in the central bore formed in each respective pronged wheel arrangement, each bearing sleeve mounted to one of the bearing rings to carry one of said pronged wheel arrangements in a freely rotatable manner on the bearing sleeve, the external surfaces of the bearing sleeve being interrupted by means defining collecting channels and discharge conduits, guide bearings detachably mounted on said central bearing axle between the bearing sleeves and plastic end bearings detach-ably mounted on said central bearing axle, said bearing sleeves and guide bearing being non-rotatable and displaceable in the longitudinal direction of the axle and provided in a sleeve like manner with a means defining an angular central aperture, and wherein the central radial planes of the pronged wheel arrangements intersect one another at an acute angle so that the edges of the crosswisely interengaging pronged wheel arrangements which slide along each other, form cutting locat-ions.
2. A hand tool according to claim 1 further including a shaft formed of hard plastic material having a handle shaft socket formed in a first end thereof and a longitudinal flat cavity formed in a second end thereof and a reinforcing plate rigidly attached to the bearing axle and received within the longitudinal cavity of said shaft.
3. A hand tool according to claim 2 wherein the end of the reinforcing plate is welded to the bearing axle and said plastic shaft forms a fixed intermediate guide bearing, the reinforcing plate being provided with bores to form a plastics material bridge.
4. A hand tool according to claim 3 wherein the collecting channels extend annularly in the surface of the bearing sleeves.
5. A hand tool according to claim 4 wherein the discharge conduits extend at right angles to the collecting channels and extend parallel with the central axis of the bearing sleeve and are disposed in the surface of the bearing sleeve.
6. A hand tool according to claim 4 wherein the annularly extending connecting channels are disposed so as to discharge into the discharge conduits which are disposed at right angles thereto.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803046436 DE3046436A1 (en) | 1980-12-10 | 1980-12-10 | Manually operated garden cultivator - has rotors with radial blades mounted in bearing bushes with intermediate, non-rotatable, slidable guide bearings |
| DEP3046436.6 | 1980-12-10 | ||
| DEGM8132020.5 | 1981-11-03 | ||
| DE19818132020 DE8132020U1 (en) | 1981-11-03 | 1981-11-03 | "HAND DEVICE FOR UNLOCKING, CUTTING AND CUTTING GARDEN GROUND" |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1170891A true CA1170891A (en) | 1984-07-17 |
Family
ID=25789622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000391529A Expired CA1170891A (en) | 1980-12-10 | 1981-12-04 | Manually operable device for loosening, cutting and crumbling garden soil |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0053839B1 (en) |
| CA (1) | CA1170891A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1242348A (en) * | 1984-01-13 | 1988-09-27 | Hans Vom Braucke | Hand tool for loosening soil |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR736952A (en) * | 1932-05-11 | 1932-12-05 | Advanced tillage implement | |
| DE7032388U (en) * | 1970-08-31 | 1970-12-03 | Dreyer Heinrich Wilhelm | SOIL TILLING EQUIPMENT. |
| DE7822114U1 (en) * | 1978-07-24 | 1978-11-09 | Edenfeld, Heinz, 4543 Lienen | TILLAGE EQUIPMENT |
| FR2452232A3 (en) * | 1979-03-29 | 1980-10-24 | Gouvy Et Cie | Fixing tang of tool to handle - using tubular metal socket over tang with epoxy! resin filling before securing end of socket over handle |
-
1981
- 1981-12-04 CA CA000391529A patent/CA1170891A/en not_active Expired
- 1981-12-09 EP EP19810110267 patent/EP0053839B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0053839A1 (en) | 1982-06-16 |
| EP0053839B1 (en) | 1985-10-02 |
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