US4865094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long log waferizer
Assignee: Carmanah Design and Manufacturing Inc
•
Filing: 1988-10-24
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Granted: 1989-09-12
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Expires: 2008-10-24
Abstract
Abstract A long log waferizer for converting logs into wafers comprising a base, with a reciprocating hydraulic cylinder for controlling a wheeled movable frame adapted for linear reciprocating movement on the base. A motor is mounted to the movable frame to drive a rotary cutter that is also mounted to the movable frame. A log delivery chute adapted to direct logs in front of the rotary cutter is provided and the movable frame is moved by the hydraulic cylinder to advance the rotary cutter into the logs, the rotary cutter cutting the logs into wafers.
Inventors
- 👤 Brian T. Stroud
- 👤 Jack Weavell
- 👤 Cameron D. Mierau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:29
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/005; B27L11/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
92 words
A long log waferizer for cutting logs into wafers comprising: a base; reciprocating means mounted to said base; a movable frame on wheels adapted for linear reciprocating movement on said base under the control of said reciprocating means; power means mounted to said movable frame; rotary cutting means mounted to said movable frame, said rotary cutting means being driven by said power means; and log delivery means adapted to direct logs in front of said rotary cutter whereby said movable frame is moved to advance said rotary cutting means into said logs.
Claim 2
Dependent Claim
92 words
A long log waferizer for cutting logs into wafers comprising: a base; reciprocating means mounted to said base; a movable frame on wheels adapted for linear reciprocating movement on said base under the control of said reciprocating means; power means mounted to said movable frame; rotary cutting means mounted to said movable frame, said rotary cutting means being driven by said power means; and log delivery means adapted to direct logs in front of said rotary cutter whereby said movable frame is moved to advance said rotary cutting means into said logs.
Claim 3
Dependent Claim
31 words
A long log waferizer as claimed in claim 1 in which said base is equipped with rails and said movable frame is equipped with rotatable wheels that travel along said rails.
Claim 4
Dependent Claim
53 words
A long log waferizer as claimed in claim 2 in which at least one set of wheels moving along a rail have a V cross-section periphery adapted to engage said rail to control lateral movement of said movable frame with respect to said rail, the remaining sets of wheels having a flat periphery.
Claim 5
Dependent Claim
26 words
A long log waferizer as claimed in claim 1 in which said reciprocating means comprises a hydraulic cylinder acting between said base and said movable frame.
Claim 6
Dependent Claim
40 words
A long log waferizer as claimed in claim 4 in which said hydraulic cylinder is fitted with a sensor to control the advance of said cylinder, said sensor stopping the advance of said cylinder upon detection of an excessive force.
Claim 7
Dependent Claim
51 words
A long log waferizer as claimed in claim 1 in which said log delivery means comprises; a chute having side walls and a base; conveying means for advancing logs along said chute; and clamping means for holding down and controlling said logs as they are cut by said rotary cutting means.
Claim 8
Dependent Claim
33 words
A long log waferizer as claimed in claim 6 in which said conveying means comprises a series of conventional feeder chains mounted across said base driven by a sprocket and chain drive system.
Claim 9
Dependent Claim
68 words
A long log waferizer as claimed in claim 6 in which said clamping means comprises: a frame; and a set of independently movable vertical bars positioned in said frame above said chute, said frame having biasing means to move said frame up and down in order to clamp logs against the base of said chute, the independently movable bars configuring themselves to the shape of the logs underneath.
Claim 10
Dependent Claim
18 words
A long log waferizer as claimed in claim 8 including clamping means for moving said movable bars together.
Claim 11
Dependent Claim
18 words
A long log waferizer as claimed in claim 8 in which said biasing means is a hydraulic cylinder.
Claim 12
Dependent Claim
65 words
A long log waferizer as claimed in claim 6 in which said clamping means comprises a plurality of jointed arms extending above said chute, each jointed arm having a first pivotable portion controlled by a fluid cylinder and second portion pivotally joined to an end of said first portion such that said second portion is free to pivot and conform to the shape of logs
Claim 13
Dependent Claim
87 words
A long log waferizer as claimed in claim 1 in which said rotary cutting means comprises: a central rotatable disc; knife carriers mounted on the disc and extending radially of said disc; spaced openings between the carriers; openings in said disc communicating with openings in said carriers; a cutting knife associated with each opening; and a cutting knife clamp bolted to the carrier to clamp each cutting knife in position, said cutting knives and said cutting knife clamps extending at least to the periphery of the disc.
Claim 14
Dependent Claim
22 words
A long log waferizer as claimed in claim 12 including a reactor knife in each opening opposite each of said cutting knives.
Claim 15
Dependent Claim
38 words
A long log waferizer as claimed in claim 13 in which each of said reactor knives is located in a dove-tail slot and held in place by a threaded fastener at the outer periphery of said rotary cutter.
Claim 16
Dependent Claim
24 words
A long log waferizer as claimed in claim 12 including a series of scoring knives removable mounted in each of said cutting knife clamps.
Claim 17
Dependent Claim
28 words
A long log waferizer as claimed in claim 12 in which each cutting knife is a double-edged knife formed with a plurality of serrations on a longitudinal edge.
Claim 18
Dependent Claim
87 words
A long log waferizer as claimed in claim 12 having means for slowly rotating said rotary cutter when performing knife changes comprising an auxiliary motor; a first wheel driven by said auxiliary motor, said wheel being mounted to a pivoting arm; a second wheel mounted to the axis of rotation of said rotary cutter or to the axis of rotation of said drive motor; said pivoting arm being movable to an engaged position such that said first wheel drives said second wheel to rotate said rotary cutter.
Claim 19
Dependent Claim
17 words
A long log waferizer as claimed in claim 1 including a break-away anvil adjacent said rotary cutter.
Claim 20
Dependent Claim
100 words
A long log waferizer as claimed in claim 1 including an electronic control system comprising: an encoder mounted to said rotary cutter to monitor rotating speed; and a feed back sensor mounted to said reciprocating means and connected to said encoder, said feed back sensor controlling said reciprocating means such that as said cutter slows down while cutting into a log, said encoder will signal said sensing unit to cause said reciprocating means to slow the linear advance of said rotary cutter into said log a corresponding amount thereby maintaining a uniform quality to the cut performed by said cutter.
Claim 21
Dependent Claim
33 words
A long log waferizer as claimed in claim 19 in which said electronic control system is controlled by software, the linear advance speed of said reciprocating means being adjustable by changing software parameters.
References Cited (Backward Citations)
US4736897A
Cited
US4736781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |