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US4249313A
Expired / Lapsed
US
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Pruning device
Assignee: Individual
•
Filing: 1979-08-17
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Granted: 1981-02-10
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Expires: 1999-08-17
Abstract
Abstract A hand held portable pruning tool having a housing enclosing a motor one or more batteries and a saw blade. The saw blade is rotatable about an axis perpendicular to the axis of the housing. The blade is normally protected by a telescoping guard element having a forwardly extending notch for receiving a stem or limb to be cut. The telescoping guard element retracts into the housing in response to pressure exerted on the guard element in the direction of the stem thus bring the stem into contact with the blade and also energizing the motor.
Inventors
- 👤 Richard G. H. Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:31
CPC Classifications
B; B27; B27B; B27B9/00; A; A01; A01G; A01G3/00; A01G3/08; Y; Y10; Y10S; Y10S30/00; Y10S30/01
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
65 words
A portable pruning device for pruning stems, limbs and the like, comprising: a housing; a saw blade mounted within said housing and extending outward therefrom; a guard shield telescopically mounted within said housing for shielding said saw blade until said guard shield is urged into said housing; and first means for automatically rotating said saw blade when said guard shield is urged into said housing.
Claim 2
Dependent Claim
65 words
A portable pruning device for pruning stems, limbs and the like, comprising: a housing; a saw blade mounted within said housing and extending outward therefrom; a guard shield telescopically mounted within said housing for shielding said saw blade until said guard shield is urged into said housing; and first means for automatically rotating said saw blade when said guard shield is urged into said housing.
Claim 3
Dependent Claim
62 words
A portable pruning device according to claim 1 wherein said first means comprises; a switch; a motor coupled to said saw blade; second means coupled to said motor via said switch for energizing said motor when said switch is closed; and contact means coupled to said guard shield for automatically closing said switch when said guard shield is urged into said housing.
Claim 4
Dependent Claim
20 words
A portable pruning device according to claim 2 wherein said guard shield is resiliently biased to shield said saw blade.
Claim 5
Dependent Claim
28 words
A pruning device according to claim 3 wherein said guard shield has two outwardly extending arms defining a notch therebetween for receiving said stems, limbs and the like.
Claim 6
Dependent Claim
32 words
A pruning device according to claim 4 wherein said saw blade is mounted on a shaft mounted in said housing and having an axis substantially perpendicular to that of said pruning device.
Claim 7
Dependent Claim
21 words
A portable pruning device according to claim 5 wherein said motor is coupled to said saw blade by a gear assembly.
Claim 8
Dependent Claim
23 words
A portable pruning device according to claim 6 further including means mounted on the exterior of said housing for manually closing said switch.
Claim 9
Dependent Claim
21 words
A portable pruning device according to claim 7 wherein said second means includes at least one battery contained within said housing.
Claim 10
Dependent Claim
16 words
A portable pruning device according to claim 8 wherein said housing is contoured to facilitate gripping.
Claim 11
Dependent Claim
36 words
A portable pruning device according to claim 6 wherein said gear assembly comprises a gear wheel coupled to said motor and a plurality of teeth on said saw blade which are engaged by said gear wheel.
References Cited (Backward Citations)
US2217923A
Cited
US2342052A
Cited
US2638944A
Cited
US3373489A
Cited
US3282308A
Cited
US3613748A
Cited
US3805639A
Cited
US3922785A
Cited
US4081906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |