US4275778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Log splitter
Assignee: Desa International LLC
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Filing: 1979-08-13
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Granted: 1981-06-30
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Expires: 1999-08-13
Abstract
Abstract A log splitting apparatus includes a horizontal beam, a hydraulic ram mounted at one end of the beam, and a wedge secured to the other end of the beam. A log placed between the ram and the wedge is split by extending the ram. The wedge is formed by a simple and inexpensive yet sturdy construction which includes a vertical center plate, a pair of wedge plates which are secured to and extend laterally away from the center plate, and gusset plates which extend perpendicularly to the center plate and reinforce the wedge plates. The ram is operable by two operating handles--one for high speed operation and one for high power operation. The handles can be operated separately or simultaneously to provide three operating speeds.
Inventors
- 👤 John A. Kotas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:02
CPC Classifications
B; B27; B27L; B27L7/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
A log splitting apparatus comprising a horizontally extending elongated beam having first and second ends, a hydraulic power pack mounted on the first end of the beam, a wedge assembly mounted on the second end of the beam, the wedge assembly including a vertically extending center plate extending parallel to the longitudinal axis of the beam and aligned with the power pack and secured to the second end of the beam, a pair of wedge plates, each of the wedge plates having a curved portion secured to the center plate and a substantially flat portion extending from the curved portion at an acute angle with respect to the center plate, and a triangularly shaped horizontally extending gusset plate on top of the center plate and extending between and engaging the flat portions of the wedge plates for reinforcing the wedge plates.
Claim 2
Dependent Claim
141 words
A log splitting apparatus comprising a horizontally extending elongated beam having first and second ends, a hydraulic power pack mounted on the first end of the beam, a wedge assembly mounted on the second end of the beam, the wedge assembly including a vertically extending center plate extending parallel to the longitudinal axis of the beam and aligned with the power pack and secured to the second end of the beam, a pair of wedge plates, each of the wedge plates having a curved portion secured to the center plate and a substantially flat portion extending from the curved portion at an acute angle with respect to the center plate, and a triangularly shaped horizontally extending gusset plate on top of the center plate and extending between and engaging the flat portions of the wedge plates for reinforcing the wedge plates.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 including a vertically extending cover plate extending over the second end of the beam and the center plate and secured thereto.
Claim 4
Dependent Claim
25 words
The apparatus of claim 2 in which said gusset plate is integral with the cover plate and extends toward the first end of the beam.
Claim 5
Dependent Claim
26 words
The apparatus of claim 1 including a ram pad on said power pack and a return spring connected to the ram pad and to the beam.
Claim 6
Dependent Claim
22 words
The apparatus of claim 4 in which the ram pad has a generally frusto-conical surface for engaging a log to be split.
Claim 7
Dependent Claim
27 words
The apparatus of claim 1 including a pair of stabilizing plates secured to the bottom of the beam at the ends thereof and extending laterally outwardly therefrom.
Claim 8
Dependent Claim
36 words
The apparatus of claim 1 in which the center plate extends toward the power pack beyond the curved portions of the wedge plates to provide a cutting edge, the cutting edge being inclined toward the pack.
Claim 9
Dependent Claim
68 words
The apparatus of claim 1 in which the power pack includes a ram reciprocally mounted in a ram cylinder, a pair of pumping cylinders, and a pumping piston reciprocably mounted in each of the pumping cylinders for forcing hydraulic fluid into the ram cylinder for extending the ram, each of the pumping pistons having a different diameter whereby each pumping piston extends the ram at a different speed.
Claim 10
Dependent Claim
53 words
The apparatus of claim 1 including at least one triangularly shaped reinforcing plate on each side of the center plate, each of said reinforcing plates extending parallel to said gusset plate below the gusset plate and being secured to the center plate and to the flat portion of one of the wedge plates.
References Cited (Backward Citations)
US2548903A
Cited
US2548902A
Cited
US2659307A
Cited
US2654568A
Cited
US2664073A
Cited
US3242955A
Cited
US3640323A
Cited
CH568158A5
Cited
US3982572A
Cited
US4103724A
Cited
US4102373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |