US4396047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric wood splitter
Assignee: Individual
•
Filing: 1981-06-01
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Granted: 1983-08-02
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Expires: 2001-06-01
Abstract
Abstract A device for splitting wood including worm driven parallel threaded shafts, which shafts mount the wood splitting wedge. Threaded nut means cooperate with the shafts and with the splitting wedge for effecting movement of the wedge along the shafts. A box frame is provided for supporting the wood to be split and for mounting the parallel shafts therein.
Inventors
- 👤 Carl E. Balkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:28
CPC Classifications
B; B27; B27L; B27L7/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
A wood splitting device comprising motor means, a drive shaft driven by said motor means, parallel jack screw shafts oriented in a plane perpendicular to the axis of said driven shaft, gear reduction means coupling said drive shaft to said jack screw shafts to cause counter-rotation of said jack screw shafts in response to rotation of said driven shaft, one of said jack screw shafts having a right hand threaded portion and another of said jack screw shafts having a left hand threaded portion, right hand threaded nut means on said right hand threaded jack screw shaft and left hand threaded nut means on said left hand threaded jack screw shaft, a wood splitting blade having a portion which non-rotatably supports said left and right hand threaded nut means so that said blade moves linearly in the plane of said counter rotating left and right hand threaded jack screw shafts in response to rotation of said jack screw shafts, a fixed frame including a base for supporting the wood to be split, and bearing means in said frame for rotatably supporting said counter-rotating jack screws.
Claim 2
Dependent Claim
185 words
A wood splitting device comprising motor means, a drive shaft driven by said motor means, parallel jack screw shafts oriented in a plane perpendicular to the axis of said driven shaft, gear reduction means coupling said drive shaft to said jack screw shafts to cause counter-rotation of said jack screw shafts in response to rotation of said driven shaft, one of said jack screw shafts having a right hand threaded portion and another of said jack screw shafts having a left hand threaded portion, right hand threaded nut means on said right hand threaded jack screw shaft and left hand threaded nut means on said left hand threaded jack screw shaft, a wood splitting blade having a portion which non-rotatably supports said left and right hand threaded nut means so that said blade moves linearly in the plane of said counter rotating left and right hand threaded jack screw shafts in response to rotation of said jack screw shafts, a fixed frame including a base for supporting the wood to be split, and bearing means in said frame for rotatably supporting said counter-rotating jack screws.
Claim 3
Dependent Claim
28 words
The wood splitter according to claim 1 further characterized by means for reversing the direction of rotation of said driven shaft to achieve return movement of said blade.
Claim 4
Dependent Claim
49 words
The wood splitter according to claim 2 wherein said gear reduction means comprises a worm gear on said drive shaft and spur gears on said jack screw shafts and meshing with said worm gear to drive said jack screw shafts in opposite directions but at corresponding speeds of rotation.
Claim 5
Dependent Claim
52 words
The wood splitter according to claim 3 further characterized by shield means for shielding said jack screws shafts from the wood to be split, said shield means comprising laterally spaced brackets located in spaced relationship to receive said movable blade therebetween, each said bracket having a lower end attached to said base.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |