Patent US3872903A successfully refreshed from Google Patents.
US3872903A
Expired / Lapsed
US
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Multiple shake-board splitting method
Assignee: Individual
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Filing: 1974-01-25
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Granted: 1975-03-25
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Expires: 1994-01-25
Abstract
Abstract A plurality of parallel froes form the bottom of a chamber in a frame for receiving a block to be split into shake-boards. The frame guides a head reciprocable by a hydraulic ram downward against the upper end of the block to force its lower end against the froes for splitting. The froes supported on the upper ends of swingable legs can spread as the froes penetrate the block to compensate for the kerfs formed by the froes between the shake boards into which the block is split.
Inventors
- 👤 Charles E Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:39
CPC Classifications
B; B27; B27L; B27L7/00; B27M; B27M3/00; B27M3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
The method of splitting substantially an entire block into shake-boards which comprises forming all the shake-boards substantially simultaneously by placing the block with the length of its grain upright in a predetermined position relative to a plurality of froes in substantially parallel horizontal relationship beneath the lower end of the block, pushing the block downward from such predetermined block position and against the splitting edges of the froes and thereby splitting the entire block substantially simultaneously into shake-boards, and spreading the froes apart horizontally relative to each other to free the split-apart shake-boards between the froes for falling past the froes while remaining in substantially parallel relationship to each other for clearing the shake-boards from such predetermined block position for reception of the next block to be split.
Claim 2
Independent Claim
128 words
The method of splitting substantially an entire block into shake-boards which comprises forming all the shake-boards substantially simultaneously by placing the block with the length of its grain upright in a predetermined position relative to a plurality of froes in substantially parallel horizontal relationship beneath the lower end of the block, pushing the block downward from such predetermined block position and against the splitting edges of the froes and thereby splitting the entire block substantially simultaneously into shake-boards, and spreading the froes apart horizontally relative to each other to free the split-apart shake-boards between the froes for falling past the froes while remaining in substantially parallel relationship to each other for clearing the shake-boards from such predetermined block position for reception of the next block to be split.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |