Patent US2941925A successfully refreshed from Google Patents.
US4122902A
Expired / Lapsed
US
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Motorized gardening tool
Assignee: Individual
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Filing: 1977-10-11
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Granted: 1978-10-31
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Expires: 1997-10-11
Abstract
Abstract A motorized, hand-held garden cultivating tool having a novel assembly of parts for converting a first reciprocating motion to a second reciprocating motion at a substantial angle to the first. The conversion assembly includes a spring-connected linkage member and is free of bearings or any friction contact that would require protection from soil or grit.
Inventors
- 👤 Warren A. Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:26
CPC Classifications
A; A01; A01B; A01B1/00; A01B1/06; A01B1/065
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A garden cultivating tool comprising: (a) a first shaft having a central bore, (b) a second shaft within said bore, (c) power means for imparting a first reciprocating motion to said second shaft, (d) an assembly of parts for converting said first motion to a second reciprocating motion, and (e) a blade in combination with said assembly, (f) said assembly including a first spring member connecting said second shaft to a linkage member which supports said blade, and (g) a second spring member supporting said linkage member at a point substantially separated from the point at which said first spring member is connected.
Claim 2
Dependent Claim
103 words
A garden cultivating tool comprising: (a) a first shaft having a central bore, (b) a second shaft within said bore, (c) power means for imparting a first reciprocating motion to said second shaft, (d) an assembly of parts for converting said first motion to a second reciprocating motion, and (e) a blade in combination with said assembly, (f) said assembly including a first spring member connecting said second shaft to a linkage member which supports said blade, and (g) a second spring member supporting said linkage member at a point substantially separated from the point at which said first spring member is connected.
Claim 3
Dependent Claim
29 words
A tool as in claim 1 wherein said second spring member is anchored to a bracket member attached to said first shaft and extending therefrom at a substantial angle.
Claim 4
Dependent Claim
27 words
A tool as in claim 2 wherein said linkage member and said bracket member extend from the axis of said first shaft at substantially the same angle.
Claim 5
Dependent Claim
27 words
A tool as in claim 3 wherein the relaxed position of said second spring member is substantially parallel to said shafts and to said first spring member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |