Patent US4257302A successfully refreshed from Google Patents.
US4257302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw tool
Assignee: Ledermann and Co
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Filing: 1978-02-08
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Granted: 1981-03-24
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Expires: 1998-02-08
Abstract
Abstract A saw tool, especially a circular saw blade, an endless saw blade, a mill saw blade or the like, with a blade-shaped tool body having detachably connected thereto at least one cutting member with a clamping element between two tensioning surfaces of the tool body. The saw tool is characterized primarily in that for purposes of obtaining the full tensioning and engaging effect of the cutting member and clamping element during a change in position of the clamping and engaging surfaces caused by the clamping deformation, the clamping element includes floating bearing means. The clamping element is an eccentric peripherally having a smaller radius of curvature than corresponding inner surfacing of a recess of an intermediate piece therewith. The intermediate piece for pivotal support at the eccentric is located with play in the recess of the tool body.
Inventors
- 👤 Eberhard Heimbrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:22
CPC Classifications
B; B23; B23D; B23D61/00; B23D61/02; B23D61/04; B23D61/06; B23D61/071; B23D61/023; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2272; Y10T407/228; Y10T83/00; Y10T83/929; Y10T83/9319; Y10T83/9326; Y10T83/9329
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
199 words
A saw tool for making a saw cut, the saw tool comprising: a tool support with a plurality of recesses distributed in spaced relation with one another along the periphery of the tool support, each recess being defined by a pair of clamping surfaces; a cutting blade disposed in each recess between the pair of clamping surfaces; an eccentric in each recess, the eccentric having a surface with a first radius of curvature and being rotatable about an axis normal to the radius of curvature; an intermediate member disposed in each recess between the eccentric and the cutting blade for holding the cutting blade against one of the clamping surfaces of the recess, said intermediate member being spaced from the bottom of said recess, the intermediate member having a first surface abutting the cutting blade and a second surface abutting the eccentric wherein the second surface has a radius of curvature substantially greater than the radius of curvature of the eccentric thereby establishing line contact between the second surface of the intermediate member and eccentric along a line normal to the line of the saw cut, whereby the intermediate member rocks about the line as the saw tool cuts.
Claim 2
Dependent Claim
199 words
A saw tool for making a saw cut, the saw tool comprising: a tool support with a plurality of recesses distributed in spaced relation with one another along the periphery of the tool support, each recess being defined by a pair of clamping surfaces; a cutting blade disposed in each recess between the pair of clamping surfaces; an eccentric in each recess, the eccentric having a surface with a first radius of curvature and being rotatable about an axis normal to the radius of curvature; an intermediate member disposed in each recess between the eccentric and the cutting blade for holding the cutting blade against one of the clamping surfaces of the recess, said intermediate member being spaced from the bottom of said recess, the intermediate member having a first surface abutting the cutting blade and a second surface abutting the eccentric wherein the second surface has a radius of curvature substantially greater than the radius of curvature of the eccentric thereby establishing line contact between the second surface of the intermediate member and eccentric along a line normal to the line of the saw cut, whereby the intermediate member rocks about the line as the saw tool cuts.
Claim 3
Dependent Claim
24 words
The saw tool of claim 1 wherein the clamping surfaces converge toward one another in a direction toward the periphery of the tool support.
Claim 4
Dependent Claim
40 words
The saw tool of claim 2 wherein the surfaces on the intermediate member and eccentric which are in abutment have laterally opposed bearing portions for providing lateral stability of the eccentric, intermediate member and tool support relative to one another.
Claim 5
Dependent Claim
40 words
The saw tool of claim 3 wherein the clamping surface of the recess opposite the surface against which the cutting blade abuts includes an arcuate indentation complementing the geometry of at least a portion of the periphery of the eccentric.
Claim 6
Dependent Claim
65 words
The saw tool of claim 3 wherein the intermediate member is split into two sections having a gap therebetween, one of which sections is disposed between the clamping surface opposite the clamping surface against which the cutting blade abuts and the other of which is between the eccentric and cutting blade, wherein the gap permits the second section to rock about the line of contact.
Claim 7
Dependent Claim
40 words
The saw tool of claims 1, 2, 3, 4 or 5 wherein the saw tool is a circular saw and the tool support is a relatively thin disc having the recesses and cutting blades spaced around the entire periphery thereof.
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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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |