Patent US4424869A successfully refreshed from Google Patents.
US4424869A
Expired / Lapsed
US
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Hand tool with intersecting pronged wheels
Assignee: BIELEFELDER KUCHENMASCHINEN-UND TRANSPORTGERATEFABRIK VOM BRAUCKE TELGENBRINK 105 BIELEFELD GFR GmbH
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Filing: 1981-12-07
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Granted: 1984-01-10
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Expires: 2001-12-07
Abstract
Abstract 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 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 center 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).
Inventors
- 👤 Hans vom Braucke
- 👤 Manfred vom Braucke
- 👤 Dieter Westerwelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:07
CPC Classifications
A; A01; A01B; A01B1/00; A01B1/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
220 words
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 arrangements 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 detachably 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 locations.
Claim 2
Dependent Claim
220 words
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 arrangements 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 detachably 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 locations.
Claim 3
Dependent Claim
57 words
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.
Claim 4
Dependent Claim
43 words
A hand tool according to claim 2, wherein an 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.
Claim 5
Dependent Claim
20 words
A hand tool according to claim 3 wherein the collecting channels extend annularly in the surface of the bearing sleeves.
Claim 6
Dependent Claim
40 words
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.
Claim 7
Dependent Claim
30 words
A hand tool according to claim 4, wherein the annularly extending collecting channels are disposed so as to discharge into the discharge conduits which are disposed at right angles thereto.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |