US3926086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable saw mill
Assignee: Individual
•
Filing: 1974-11-01
•
Granted: 1975-12-16
•
Expires: 1994-11-01
Abstract
Abstract A portable saw mill adapted to make a longitudinal cut in a log includes an elongated frame having a front end, a rear end, a horizontal lower section adapted to support a log, and a horizontal upper section spaced above the lower section. A carriage is mounted on the frame upper section for movement therealong. A flexible cable has its ends secured to the carriage, a front portion passed around an idler pulley mounted on the front end of the frame, and a rear portion wound around a rotatable drum journalled on the rear end of the frame. A conventional chain saw is positioned between the upper and lower frame sections and is supported by the carriage. A pair of vertically-movable racks have their lower ends connected to the bar of the chain saw, and have intermediate portions engaging pinions mounted on a rotatable shaft journalled on the carriage. By rotating this shaft, the racks may be moved vertically to raise or lower the chain saw relative to a log being sawed.
Inventors
- 👤 Paul R Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:05
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/0091; B27B17/0041; B27B17/005; Y; Y10; Y10T; Y10T83/00; Y10T83/667; Y10T83/68; Y10T83/707; Y10T83/7101; Y10T83/7108; Y10T83/7145
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
217 words
A saw mill adapted to make a longitudinal cut in a log, comprising: an elongated frame having a front end and a rear end, said frame including a horizontal lower section adapted to support a log to be sawed and including a horizontal upper section spaced above said lower section; a carriage arranged on said upper section for movement therealong in either longitudinal direction; carriage movement means engaging said carriage and said front and rear frame ends and operable to move said carriage along said upper section in either of said longitudinal directions; a chain saw positioned between said upper and lower sections and supported by said carriage for movement therewith and operable to make a longitudinal cut in a log supported by said lower section; and adjustment means operAtively arranged between said chain saw and carriage for adjusting the vertical position of said chain saw relative to said carriage, said adjustment means including a pair of transversely-spaced vertically-movable racks having their lower ends connected to said chain saw, a transverse shaft rotatably mounted on said carriage, and a pair of transversely-spaced pinions mounted fast to said shaft and positioned to engage said racks, whereby by rotating said shaft said racks may be moved to adjust the vertical position of said chain saw relative to said carriage.
Claim 2
Dependent Claim
217 words
A saw mill adapted to make a longitudinal cut in a log, comprising: an elongated frame having a front end and a rear end, said frame including a horizontal lower section adapted to support a log to be sawed and including a horizontal upper section spaced above said lower section; a carriage arranged on said upper section for movement therealong in either longitudinal direction; carriage movement means engaging said carriage and said front and rear frame ends and operable to move said carriage along said upper section in either of said longitudinal directions; a chain saw positioned between said upper and lower sections and supported by said carriage for movement therewith and operable to make a longitudinal cut in a log supported by said lower section; and adjustment means operAtively arranged between said chain saw and carriage for adjusting the vertical position of said chain saw relative to said carriage, said adjustment means including a pair of transversely-spaced vertically-movable racks having their lower ends connected to said chain saw, a transverse shaft rotatably mounted on said carriage, and a pair of transversely-spaced pinions mounted fast to said shaft and positioned to engage said racks, whereby by rotating said shaft said racks may be moved to adjust the vertical position of said chain saw relative to said carriage.
Claim 3
Dependent Claim
99 words
A saw mill as set forth in claim 1 wherein said carriage movement means includes: a pulley mounted on one of said frame ends; a rotatable drum mounted on the other of said frame ends; and a flexible cable having its ends secured to said carriage, having one portion passed around said pulley, and having another portion wound around said drum, whereby when said drum is rotated in one angular direction said carriage is moved in one longitudinal direction, and when said drum is rotated in an opposite angular direction said carriage is moved in the opposite longitudinal direction.
Claim 4
Dependent Claim
26 words
A saw mill as set forth in claim 1 wherein said chain saw includes a bar, and said rack lower ends are connected to said bar.
Claim 5
Dependent Claim
60 words
A saw mill as set forth in claim 3 and further including: a fuel tank mounted on said carriage; an oil tank mounted on said carriage; a fuel conduit communicating said fuel tank with the fuel tank of said chain saw; and an oil conduit communicating said oil tank with said bar for lubricating the track groove of said bar.
Claim 6
Dependent Claim
47 words
A saw mill as set forth in claim 1 wherein said adjustment means includes: stop means mounted on said carriage and adapted to releasably hold said shaft immovable at a selected angular position to maintain a selected vertical height of said chain saw relative to said carriage.
Claim 7
Dependent Claim
56 words
A saw mill as set forth in claim 5 wherein said stop means includes: a stop pinion fast to said shaft; and a lever pivotally mounted on said carriage and having a toothed portion adapted to releasably engage said stop pinion, whereby when said toothed portion is engaged with said pinion said shaft is held immovable.
Claim 8
Dependent Claim
54 words
A saw mill as set forth in claim 1 further including: holding means mounted on said frame lower section for supporting an arcuate surface of a log to be sawed, said holding means including a transversely-extending rotatable rod journalled in said lower section and a pair of transversely-spaced cam members fast on said rod.
Claim 9
Dependent Claim
66 words
A saw mill as set forth in claim 7 wherein said cam members are circular discs mounted eccentrically on said rod such that when said rod is rotated to an operative position said discs may be exposed above said lower section to support said arcuate log surface, and when said rod is rotated to an inoperative position said discs may be concealed within said lower section.
Claim 10
Dependent Claim
38 words
A saw mill as set forth in claim 7 and further including: a peavey stop having a collar slidably and rotatably surrounding said rod and adapted to be moved to a raised position and to a lowered position.
Claim 11
Dependent Claim
58 words
A saw mill as set forth in claim 1 and further comprising: trigger disengagement means engaging the throttle trigger of said chain saw and operative to cause said chain saw when operating to return from a cutting speed to an idle speed when said disengagement means strikes an object as said carriage is moved longitudinally along said frame.
Claim 12
Dependent Claim
68 words
A saw mill as set forth in claim 1, further comprising: an end stop mounted on said lower section and adapted to prevent longitudinal movement of a log being sawed relative to said lower section, said end stop being pivtally mounted on said lower section and counter-weighted to move to an operative raised position but also adapted to pivot to an inoperative position concealed within said lower section.
Claim 13
Dependent Claim
54 words
A saw mill as set forth in claim 1 and further comPrising: a plurality of raised bosses mounted on the upper surface of said lower section and adapted to engage a squared side face of a log being sawed to prevent transverse movement in one direction of said log relative to said lower section.
Claim 14
Dependent Claim
48 words
A saw mill as set forth in claim 1, further comprising: support means mounted on the motor-housing of said chain saw and adapted to slidably engage a squared side face of a log being sawed to partially support the weight of the motor unit of said chain saw.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |