Patent DE831874C successfully refreshed from Google Patents.
US3827643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood comminuting apparatus
Assignee: Maschinenfabrik B Maier KG
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Filing: 1973-02-05
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Granted: 1974-08-06
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Expires: 1993-02-05
Abstract
Abstract A wood comminuting apparatus has a fixed drum cage on the periphery of which are mounted a plurality of axially extending blade bars. Each blade bar has a surface upon which is supported a blade and a blade retaining plate. A clamping lever is mounted on a bracket which is fixed to the blade bar. The clamping lever acts upon the blade retaining plate to press the plate and blade against a supporting surface of the bar and to position the cutting edge of the blade to expose a predetermined portion of the cutting edge.
Inventors
- 👤 W Grube
- 👤 K Rutz
- 👤 B Jung
- 👤 J Schrage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/005; B27L11/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
In an apparatus for comminuting wood pieces, the combination of a blade bar on the periphery of a fixed drum cage, a blade set comprising a blade and a blade retaining plate, said blade bar having a surface to support said blade set at an acute angle to the radial plane thereon, and means mounted on said blade bar for clamping said blade set firmly against said blade supporting surface.
Claim 2
Dependent Claim
70 words
In an apparatus for comminuting wood pieces, the combination of a blade bar on the periphery of a fixed drum cage, a blade set comprising a blade and a blade retaining plate, said blade bar having a surface to support said blade set at an acute angle to the radial plane thereon, and means mounted on said blade bar for clamping said blade set firmly against said blade supporting surface.
Claim 3
Dependent Claim
58 words
In an apparatus as claimed in claim 1 wherein said clamping means comprises a bracket attached to said blade bar, a clamping lever pivotally mounted on said bracket and engageable with said blade set to press said blade set onto said blade supporting surface, and toggle lever operating means pivotally connected to said clamping lever and said bracket.
Claim 4
Dependent Claim
80 words
In an apparatus as claimed in claim 2 wherein said bracket has an abutment thereon agaiNst which said blade is clamped to position the cutting edge of the blade in a predetermined manner, a clamping head on said clamping lever and engageable with a surface of said blade retaining plate in the clamped position, said surface of the blade retaining plate being so inclined to apply a force component on said blade set urging said blade set against said abutment.
Claim 5
Dependent Claim
30 words
In an apparatus as claimed in claim 3 and comprising a pair of spaced guides on said blade retaining plate surface extending axially thereof for positioning said clamping lever thereon.
Claim 6
Dependent Claim
41 words
In an apparatus as claimed in claim 2 and comprising means perpendicular to the blade edge and in the plane of the said blade supporting surface between said bracket and said blade set for positioning the cutting edge of said blade.
Claim 7
Dependent Claim
44 words
In an apparatus as claimed in claim 5 wherein said blade positioning means comprises a portion of said bracket extending over said blade set, there being opposed grooves in said bracket portion and said blade retaining plate, and means for interlinking said opposed grooves.
Claim 8
Dependent Claim
46 words
In an apparatus as claimed in claim 1 wherein said clamping means comprises an arm attached to said blade bar and extending over said blade set, there being opposed grooves in said arm and said blade retaining plate, and a wedge inserted into said opposed grooves.
Claim 9
Dependent Claim
33 words
In an apparatus as claimed in claim 1 and comprising a plurality of axially extending blade bars on the periphery of a cage and a corresponding plurality of blade sets and clamping means.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |