US3721146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable sawmill having a horizontal traversing bandsaw
Assignee: Individual
•
Filing: 1971-03-08
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Granted: 1973-03-20
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Expires: 1991-03-08
Abstract
Abstract A sawmill comprising a horizontal bandsaw which traverses upon paired rail members supported above and straddling a log supporting base by parallel pivotal arms which transmit structural rigidity to the rail members from the base while also providing an adjustable relationship to the base. The essence of advantage resides in this rigidity, which, in combination with a low loading-level at which a log can be loaded upon the mill, enables new methods and systems of operation purporting to reduce over-all investment requirement and increase versatility and efficiency.
Inventors
- 👤 Manama C Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:56
CPC Classifications
B; B23; B23D; B23D53/00; B23D53/04; B23D53/001; B27; B27B; B27B15/00; B27B15/02; Y; Y10; Y10S; Y10S83/00; Y10S83/928; Y10T; Y10T83/00; Y10T83/707; Y10T83/7101; Y10T83/7108; Y10T83/7195; Y10T83/722; Y10T83/768; Y10T83/7684; Y10T83/7693
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
In a sawmill having a horizontal bandsaw which traverses in sawing upon a rail structure of paired side rails which straddle a log being sawed, and having a means to adjustably support this rail structure from a base upon which the log is positioned; a means to adjustably support said rail structure upon the base comprising a plural number of parallel U-shaped cross bars spaced under the rail structure, each leg of each U-shaped cross bar pivotally attached to a respective side rail, and the base of each U-shaped cross bar pivotally hinged upon the aforesaid base, and a means to move the rail structurE forward or backward upon said pivotally mounted U-shaped cross bars or retain any desired relative position thereon.
Claim 2
Dependent Claim
122 words
In a sawmill having a horizontal bandsaw which traverses in sawing upon a rail structure of paired side rails which straddle a log being sawed, and having a means to adjustably support this rail structure from a base upon which the log is positioned; a means to adjustably support said rail structure upon the base comprising a plural number of parallel U-shaped cross bars spaced under the rail structure, each leg of each U-shaped cross bar pivotally attached to a respective side rail, and the base of each U-shaped cross bar pivotally hinged upon the aforesaid base, and a means to move the rail structurE forward or backward upon said pivotally mounted U-shaped cross bars or retain any desired relative position thereon.
Claim 3
Dependent Claim
76 words
In a sawmill as set forth in claim 1, said means to move the rail structure forward and backward comprising an elongate member, pivotally attached to the rail structure and pivotally attached to the said base, adapted to extend or lesses the distance between these pivotal attachments and, by virtue of this, consequently effect movement of the rail structure forward and backward upon said pivotally mounted U-shaped cross bars or retain any desired relative position thereon.
Claim 4
Dependent Claim
34 words
In a sawmill as set forth in claim 2, a means to secure a log firmly in sawing position comprising a pair of jaws mounted upon said base adapted to engage a log therebetween.
Claim 5
Dependent Claim
117 words
In a sawmill having a horizontal bandsaw which traverses in sawing upon a rail structure of paired side rails which straddle a log being sawed, and having a means to adjustably support structure from a base upon which the log is positioned; said means to adjustably support said rail structure comprising a plural number of equal pairs of parallel arm structures hingedly attached upon an axis crosswise of said rails and base, one arm-structure of each pair attached to a respective rail of the paired side rails from the said base, and a mechanical means adapted to move the rail structure forward and backward in an arc over the base, or to retain any desired position thereupon.
Claim 6
Dependent Claim
117 words
In a sawmill having a horizontal bandsaw which traverses in sawing upon a rail structure of paired side rails which straddle a log being sawed, and having a means to adjustably support structure from a base upon which the log is positioned; said means to adjustably support said rail structure comprising a plural number of equal pairs of parallel arm structures hingedly attached upon an axis crosswise of said rails and base, one arm-structure of each pair attached to a respective rail of the paired side rails from the said base, and a mechanical means adapted to move the rail structure forward and backward in an arc over the base, or to retain any desired position thereupon.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |