Patent US3870090A successfully refreshed from Google Patents.
US3870090A
Expired / Lapsed
US
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Arrangement in planing machines with feeding mechanism comprising at least two rollers
Assignee: SVENSKA IND TABLERINGS SVETAB
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Filing: 1973-03-20
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Granted: 1975-03-11
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Expires: 1993-03-20
Abstract
Abstract A feeding device for wood, especially for a planing machine, in which at least two feeding rollers are arranged above a feeding path for the wood and are adapted to be adjusted by a compression spring in conformity with the desired pressure the rollers are to exert upon wood on the feeding path. This compression spring acts between a first bearing located on a first support and an element displaceable in the direction of action of the compression spring in a second bearing which is located on another support, the bearings respectively being pivotable in their pertaining supports while an adjustable counter action device is operable to hold the rollers against the action of the compression spring when no wood is on the feeding path.
Inventors
- 👤 Morten Birger Hasfjord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:20
CPC Classifications
B; B27; B27C; B27C1/00; B27C1/12; B23; B23Q; B23Q3/00; B23Q3/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
230 words
An arrangement in a planing machine with a feeding mechanism for wood, comprising a pair of feeding rollers disposed on one side of a feeding path for the wood each roller being supported by a supporting means, both said supporting means being pivotable around a common pivot axis disposed in parallel direction with the rotational axes of the feeding rollers, said feeding rollers having pressure adjustment means associated therewith for setting the pressure of the feeding rollers against wood fed on the feeding path in order to adapt said pressure to the thickness of the wood through swinging movement of said supporting means downwards around the common pivot axis, characterized in that said pressure adjustment means comprises a compression spring device located on the side of the common pivot axis facing away from the feeding path and acting between a first bearing means located at one of said supporting means and a pressure controlling element displaceable in the direction of action of the compression spring device in a second bearing means located at the other supporting means, both of said bearing means being pivotable in the corresponding supporting means around a corresponding axis extending in parallel direction with said common pivot axis, an adjustable counter action device being arranged to hold the rollers against the action of the spring tension force when no wood is present on the feeding path.
Claim 2
Dependent Claim
230 words
An arrangement in a planing machine with a feeding mechanism for wood, comprising a pair of feeding rollers disposed on one side of a feeding path for the wood each roller being supported by a supporting means, both said supporting means being pivotable around a common pivot axis disposed in parallel direction with the rotational axes of the feeding rollers, said feeding rollers having pressure adjustment means associated therewith for setting the pressure of the feeding rollers against wood fed on the feeding path in order to adapt said pressure to the thickness of the wood through swinging movement of said supporting means downwards around the common pivot axis, characterized in that said pressure adjustment means comprises a compression spring device located on the side of the common pivot axis facing away from the feeding path and acting between a first bearing means located at one of said supporting means and a pressure controlling element displaceable in the direction of action of the compression spring device in a second bearing means located at the other supporting means, both of said bearing means being pivotable in the corresponding supporting means around a corresponding axis extending in parallel direction with said common pivot axis, an adjustable counter action device being arranged to hold the rollers against the action of the spring tension force when no wood is present on the feeding path.
Claim 3
Dependent Claim
230 words
An arrangement in a planing machine with a feeding mechanism for wood, comprising a pair of feeding rollers disposed on one side of a feeding path for the wood each roller being supported by a supporting means, both said supporting means being pivotable around a common pivot axis disposed in parallel direction with the rotational axes of the feeding rollers, said feeding rollers having pressure adjustment means associated therewith for setting the pressure of the feeding rollers against wood fed on the feeding path in order to adapt said pressure to the thickness of the wood through swinging movement of said supporting means downwards around the common pivot axis, characterized in that said pressure adjustment means comprises a compression spring device located on the side of the common pivot axis facing away from the feeding path and acting between a first bearing means located at one of said supporting means and a pressure controlling element displaceable in the direction of action of the compression spring device in a second bearing means located at the other supporting means, both of said bearing means being pivotable in the corresponding supporting means around a corresponding axis extending in parallel direction with said common pivot axis, an adjustable counter action device being arranged to hold the rollers against the action of the spring tension force when no wood is present on the feeding path.
Claim 4
Dependent Claim
230 words
An arrangement in a planing machine with a feeding mechanism for wood, comprising a pair of feeding rollers disposed on one side of a feeding path for the wood each roller being supported by a supporting means, both said supporting means being pivotable around a common pivot axis disposed in parallel direction with the rotational axes of the feeding rollers, said feeding rollers having pressure adjustment means associated therewith for setting the pressure of the feeding rollers against wood fed on the feeding path in order to adapt said pressure to the thickness of the wood through swinging movement of said supporting means downwards around the common pivot axis, characterized in that said pressure adjustment means comprises a compression spring device located on the side of the common pivot axis facing away from the feeding path and acting between a first bearing means located at one of said supporting means and a pressure controlling element displaceable in the direction of action of the compression spring device in a second bearing means located at the other supporting means, both of said bearing means being pivotable in the corresponding supporting means around a corresponding axis extending in parallel direction with said common pivot axis, an adjustable counter action device being arranged to hold the rollers against the action of the spring tension force when no wood is present on the feeding path.
Claim 5
Dependent Claim
55 words
An arrangement according to claim 1, characterized in that the compression spring device comprises a helical compression spring acting between said first bearing means and a stop located on a threaded bar forming said pressure controlling element, said bar extending through and in threaded engagement with said second bearing means in alignment with the spring.
Claim 6
Dependent Claim
51 words
An arrangement according to claim 2, characterized in that said threaded bar extends through the entire length of the spring and forms a guiding means for said first bearing means at the end of said spring facing away from the stop, said first bearing means being freely slidable on the rod.
Claim 7
Dependent Claim
36 words
An arrangement according to claim 1, characterized in that the displacement of said pressure controlling element in said second bearing means and thus the spring device tension is adjustable by means of a calibrated setting device.
Claim 8
Dependent Claim
32 words
An arrangement according to claim 1, characterized in that the counter-action device comprises screws screwed through each of said supporting means, said screws cooperating with a rigid stop in the machine frame.
Claim 9
Dependent Claim
199 words
In a planing machine for planing wood, a frame structure; a feeding path for said wood; a pair of lever means pivotally supported in said frame structure around a common pivot axis extending transversely to said feeding path in a plane parallel thereto, each lever means rotatably supporting a corresponding wood feeding roller around a rotational axis extending in parallel to said common pivot axis, a pair of arm means rigidly connected to one of said lever means each and extending away from said feeding path, each arm means having a bearing element rotatably supported around a rotational axis parallel to said pivot axis, a bar extending in parallel to said feeding path through said bearing elements, said bar being threadedly engaged with one of said bearing elements and freely movable in its longitudinal direction through the other bearing element, a helical compression spring extending around said bar between a first stop on said bar at said other bearing element and a second stop on said bar between said bearing elements, means for rotating said bar; means for supporting said lever means against the action of said helical spring when there is no wood present on said feeding path.
Claim 10
Dependent Claim
199 words
In a planing machine for planing wood, a frame structure; a feeding path for said wood; a pair of lever means pivotally supported in said frame structure around a common pivot axis extending transversely to said feeding path in a plane parallel thereto, each lever means rotatably supporting a corresponding wood feeding roller around a rotational axis extending in parallel to said common pivot axis, a pair of arm means rigidly connected to one of said lever means each and extending away from said feeding path, each arm means having a bearing element rotatably supported around a rotational axis parallel to said pivot axis, a bar extending in parallel to said feeding path through said bearing elements, said bar being threadedly engaged with one of said bearing elements and freely movable in its longitudinal direction through the other bearing element, a helical compression spring extending around said bar between a first stop on said bar at said other bearing element and a second stop on said bar between said bearing elements, means for rotating said bar; means for supporting said lever means against the action of said helical spring when there is no wood present on said feeding path.
Claim 11
Dependent Claim
89 words
The arrangement according to claim 6, wherein each lever means carries a roller cover rotatably supporting a rotational shaft for the corresponding wood feeding roller and carrying a corresponding one of said arms means, said means for supporting said lever means against the action of said helical spring comprising at each of said covers a threaded support rod extending through a correspondingly threaded hole in the cover towards said feeding path, the end of said rod turned towards the feeding path abutting against a stop in said frame structure.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |