Patent US2176735A successfully refreshed from Google Patents.
Patent US3736967A successfully refreshed from Google Patents.
US3736967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feeder for wood flaking or chipping machine
Assignee: Potlatch Forests Inc
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Filing: 1971-08-16
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Granted: 1973-06-05
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Expires: 1991-08-16
Abstract
Abstract A device for producing wood particles, such as chips, wafers, flakes or strands, by moving solid wood material toward a moving cutter head. Movement of the material is accomplished along a feed conveyor in the form of an endless conveying apparatus having transverse pushing bars. The conveyor is powered by a pneumatic power source, such as a rotary pneumatic motor directly geared to the conveyor elements. The resilient nature of the pneumatic power source assures quick recovery of the wood material as it is urged toward the moving cutter head, thereby producing particules of more uniform thickness.
Inventors
- 👤 W Wood
- 👤 J Fechner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:16
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
In an apparatus for production of wood particles such as chips, wafers, flakes or strands, the combination of: a cutter head having a plurality of knives and intermediate recessed guide surface areas moving about a predetermined path; an endless feed conveyor having a working flight directed along a path which intersects the path of the knives, said feed conveyor having transverse pusher elements thereon facing toward the direction of movement of the conveyor along its working flight for abutting raw wood blocks and pushing each block into engagement with the knives and intermediate guide surface areas; and a rotary pneumatic motor drivingly connected to said feed conveyor for imparting to said working flight a yieldable force urging said transverse pusher elements towards the cutter head, the resulting pressure exerted on the raw wood blocks by said force being less than that at which the wood fibers thereof are physically damaged by crushing.
Claim 2
Dependent Claim
152 words
In an apparatus for production of wood particles such as chips, wafers, flakes or strands, the combination of: a cutter head having a plurality of knives and intermediate recessed guide surface areas moving about a predetermined path; an endless feed conveyor having a working flight directed along a path which intersects the path of the knives, said feed conveyor having transverse pusher elements thereon facing toward the direction of movement of the conveyor along its working flight for abutting raw wood blocks and pushing each block into engagement with the knives and intermediate guide surface areas; and a rotary pneumatic motor drivingly connected to said feed conveyor for imparting to said working flight a yieldable force urging said transverse pusher elements towards the cutter head, the resulting pressure exerted on the raw wood blocks by said force being less than that at which the wood fibers thereof are physically damaged by crushing.
Claim 3
Dependent Claim
54 words
An apparatus as set out in claim 1 wherein the working flight comprises a portion of an endless conveyor for moving the pusher elements in a longitudinal path along said working flight toward said cutter head; said pneumatic power source comprising a rotary pneumatic motor having an output shaft positively driving said endless conveyor.
Claim 4
Dependent Claim
22 words
An apparatus as set out in claim 1 wherein the pneumatic motor includes an output shaft geared directly to the endless conveyor.
Claim 5
Dependent Claim
48 words
An apparatus as set out in claim 1 wherein the cutter head is a cylindrical drum having projecting knives protruding beyond the cylindrical periphery thereof, whereby wood material is accelerated along the feed conveyor toward the cylindrical periphery of the drum as the knives remove wood particles therefrom.
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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |