Patent US3913645A successfully refreshed from Google Patents.
US3913645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping mechanism for blades in rotary material removing tools
Assignee: Maschinenfabrik B Maier KG
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Filing: 1974-07-30
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Granted: 1975-10-21
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Expires: 1994-07-30
Abstract
Abstract A material removing tool, wherein a rotary carrier supports several holders for discrete blades each having an elongated cutting edge and a rear edge which is parallel to the cutting edge and abuts against a shoulder of the respective holder. The end surfaces of each blade have triangular notches for pins which are provided on the respective holder and one of which is biased toward the other pin by a helical spring. The pins thereby bear against inclined cam faces which bound portions of the respective notches and cause the rear edge to remain in abutment with the respective shoulder. A blade can be removed after the movable pin is shifted away from the other pin.
Inventors
- 👤 Gerhard Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:12
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/005; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1934; Y10T407/1938; Y10T407/194
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
In a material removing tool, particularly in a rotary tool for removing shavings from wood, a combination comprising a holder having a supporting surface and an abutment extending beyond said surface; a substantially flat blade having an elongated cutting edge, a rear edge located opposite said cutting edge, two major surfaces one of which abuts against said supporting surface, and first and second cam faces; and means for releasably retaining said rear edge in engagement with said abutment, including first and second projections provided on said holder adjacent to said first and second cam faces, at least said first projection being movable with respect to said holder and said retaining means further comprising means for biasing said first projection against said first cam face with a predetermined force having a first component which urges said second cam face against said second projection and a second component which urges said rear edge against said abutment due to engagement of said cam faces with the respective projections, said blade being separable from said holder upon movement of said first projection away from said first cam face against the opposition of said biasing means.
Claim 2
Dependent Claim
191 words
In a material removing tool, particularly in a rotary tool for removing shavings from wood, a combination comprising a holder having a supporting surface and an abutment extending beyond said surface; a substantially flat blade having an elongated cutting edge, a rear edge located opposite said cutting edge, two major surfaces one of which abuts against said supporting surface, and first and second cam faces; and means for releasably retaining said rear edge in engagement with said abutment, including first and second projections provided on said holder adjacent to said first and second cam faces, at least said first projection being movable with respect to said holder and said retaining means further comprising means for biasing said first projection against said first cam face with a predetermined force having a first component which urges said second cam face against said second projection and a second component which urges said rear edge against said abutment due to engagement of said cam faces with the respective projections, said blade being separable from said holder upon movement of said first projection away from said first cam face against the opposition of said biasing means.
Claim 3
Dependent Claim
16 words
A combination as defined in claim 1, wherein said second projection is rigid with said holder.
Claim 4
Dependent Claim
22 words
A combination as defined in claim 1, wherein said cam faces are inclined with respect to said rear edge of said blade.
Claim 5
Dependent Claim
70 words
A combination as defined in claim 1, wherein said first projection is reciprocable with respect to said holder and said supporting surface has a groove substantially parallel to said rear edge, said first projection having a portion which is slidably received in said groove and said biasing means comprising a spring reacting against said holder and bearing against said first projection to urge the cutter against said first cam face.
Claim 6
Dependent Claim
38 words
A combination as defined in claim 1, wherein said blade further comprises first and second end surfaces having first and second notches and said first and second cam faces respectively bound portions of said first and second notches.
Claim 7
Dependent Claim
27 words
A combination as defined in claim 1, wherein said cutting edge is parallel to said rear edge and said abutMent is an elongated shoulder on said holder.
Claim 8
Dependent Claim
17 words
A combination as defined in claim 1, wherein at least one of said projections is a pin.
Claim 9
Dependent Claim
29 words
A combination as defined in claim 1, wherein each said cam faces makes with said rear edge an acute angle and said cam faces are inclined in opposite directions.
Claim 10
Dependent Claim
41 words
A combination as defined in claim 1, wherein said blade has third and fourth projections respectively located between said rear edge and said first and second projections, said first and second cam faces being provided on said third and fourth projections.
Claim 11
Dependent Claim
19 words
A combination as defined in claim 9, wherein said biasing means urges said first projection toward said second projection.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |