Patent US3989077A successfully refreshed from Google Patents.
US3989077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutter
Assignee: Maschinenfabrik B Maier KG
•
Filing: 1975-03-12
•
Granted: 1976-11-02
•
Expires: 1995-03-12
Abstract
Abstract A cutter for removing chips from wood has a rotary carrier whose peripheral surface is formed with rearwardly and inwardly inclined recesses for permanent magnets which attract plate-like blades having cutting edges which extend radially outwardly beyond the peripheral surface of the carrier. The blades consist of magnetic material and are attracted to the permanent magnets. The magnets have dovetailed projections extending into complementary grooves of the carrier. Each blade is urged against the respective magnet by a spring-biased wedge in the respective recess, and the inner edge of each blade bears against a plate-like abutment which is attracted to the respective magnet.
Inventors
- 👤 Manfred Humbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:11
CPC Classifications
B; B27; B27G; B27G13/00; B27G13/02; B27G13/04; B27L; B27L11/00; B27L11/005; Y; Y10; Y10T; Y10T279/00; Y10T279/23; Y10T407/00; Y10T407/11; Y10T407/116; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
A cutter for removing fragments from wood or the like, comprising a support arrangement mounted for rotation in a predetermined direction, said support arrangement having a peripheral surface, a recess in said surface and holder means disposed in said recess, removable plate-like blade means disposed in said recess, said blade means having a first side adjacent to said holder means, a second side and a cutting edge extending from said recess, said holder means constituting a permanent magnet and said blade means consisting of magnetic material so that said blade means is attracted to said holder means; and a device for biasing said blade means against said holder means.
Claim 2
Dependent Claim
109 words
A cutter for removing fragments from wood or the like, comprising a support arrangement mounted for rotation in a predetermined direction, said support arrangement having a peripheral surface, a recess in said surface and holder means disposed in said recess, removable plate-like blade means disposed in said recess, said blade means having a first side adjacent to said holder means, a second side and a cutting edge extending from said recess, said holder means constituting a permanent magnet and said blade means consisting of magnetic material so that said blade means is attracted to said holder means; and a device for biasing said blade means against said holder means.
Claim 3
Dependent Claim
36 words
A cutter as defined in claim 1, wherein said biasing means comprises a wedge abutting against said second side of said blade means and resilient means urging said wedge against said side of said blade means.
Claim 4
Dependent Claim
31 words
A cutter as defined in claim 1, wherein said blade means has a second edge opposite said cutting edge and said support arrangement further comprises an abutment for said second edge.
Claim 5
Dependent Claim
50 words
A cutter as defined in claim 1, wherein said blade means has a second edge disposed opposite said cutting edge and said support arrangement further comprises a plate-like abutment engaging said second edge of said blade means, said abutment consisting of magnetic material and being attracted to said holder means.
Claim 6
Dependent Claim
32 words
A cutter as defined in claim 4, wherein said support arrangement comprises a carrier for said holder means and an adjusting element secured to said carrier and constituting a stop said abutment.
Claim 7
Dependent Claim
26 words
A cutter as defined in claim 1, wherein the holder means are disposed at the trailing end of the recess, as considered in the predetermined direction.
Claim 8
Dependent Claim
24 words
A cutter as defined in claim 1, wherein said support arrangement comprises a carrier and means for securing said holder means to said carrier.
Claim 9
Dependent Claim
60 words
A cutter as defined in claim 7, wherein said blade means has an elongated slot extending substantially radially of said support arrangement and said holder means has a projection extending into said slot to hold said blade means against movement axially of said support arrangement but to permit radial shifting of said blade means with respect to said support arrangement.
Claim 10
Dependent Claim
43 words
A cutter as defined in claim 1, wherein said support arrangement comprises a carrier having a dovetailed groove extending in parallelism with the axis of said support arrangement, said holder means having a complementary projection extending into said dovetailed groove of said carrier.
Claim 11
Dependent Claim
40 words
A cutter as defined in claim 1, wherein said support arrangement comprises a discrete carrier for said holder means and an insert consisting of diamagnetic material and being interposed between said carrier of said support arrangement and said holder means.
Claim 12
Dependent Claim
113 words
A cutter as defined in claim 1, wherein said blade means has a second edge located opposite said cutting edge and said support arrangement comprises a carrier, means for separably securing said holder means to said carrier of said support arrangement, and an abutment consisting of magnetic material and being attracted to said holder means, said abutment and said blade means having elongated slots extending substantially radially of said support arrangement and said holder means having projections extending into said slots to hold said blade means and said abutment against movement axially of said support arrangement but to permit adjustments of said blade means and said abutment substantially radially of said support arrangement.
Claim 13
Dependent Claim
109 words
A cutter for removing fragments from wood or the like, comprising a support arrangement mounted for rotation in a predetermined direction, said support arrangement having a peripheral surface, a recess in said surface and holder means disposed in said recess, removable plate-like blade means disposed in said recess, said blade means having a first side adjacent to said holder means, a second side and a cutting edge extending from said recess, said blade means constituting a permanent magnet, and said holder means consisting of magnetic material so that said blade means is attracted to said holder means; and a device for biasing said blade means against said holder means.
Claim 14
Dependent Claim
109 words
A cutter for removing fragments from wood or the like, comprising a support arrangement mounted for rotation in a predetermined direction, said support arrangement having a peripheral surface, a recess in said surface and holder means disposed in said recess, removable plate-like blade means disposed in said recess, said blade means having a first side adjacent to said holder means, a second side and a cutting edge extending from said recess, said blade means constituting a permanent magnet, and said holder means consisting of magnetic material so that said blade means is attracted to said holder means; and a device for biasing said blade means against said holder means.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |