US3825047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand saw having demountable blade
Assignee: Atlantic Service Co Inc
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Filing: 1973-10-12
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Granted: 1974-07-23
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Expires: 1993-10-12
Abstract
Abstract A saw frame of the so-called back saw type is disclosed, including a readily replaceable saw blade, the assembly being characterized by novel and improved coupling means for securely attaching the blade to the frame, while at the same time rigidifying the blade against flexure in the plane of the blade.
Inventors
- 👤 Manus W Mc
- 👤 J Bouffard
- 👤 L Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:31
CPC Classifications
B; B23; B23D; B23D49/00; B23D49/10; B23D49/14; B23D51/00; B23D51/08; B23D51/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A saw mechanism for attachment to a replaceable blade comprising, in combination, a handle, a longitudinally elongated spine member extending from said handle, said spine member having a longitudinally extending, depending centering groove, a locking bracket fixed to said handle and extending below said spine, a blade locking assembly on said bracket, said assembly including a draw bar shiftable generally in the direction of said spine, a mounting lever pivotally secured to said spine in spaced relation to said handle, the included angle between said lever and the portion of said spine extending toward said handle being less than 90*, connecting means formed on said lever in spaced relation to said spine and a blade member mounted to said frame, said blade member including a first pivotal connection with said connecting means of said locking lever, and a second connection with said draw bar, said draw bar exerting a force on said blade, the principal components of which are parallel with said spine and toward said handle, whereby the upper edge of said blade is tightly pressed upwardly into said centering groove.
Claim 2
Dependent Claim
182 words
A saw mechanism for attachment to a replaceable blade comprising, in combination, a handle, a longitudinally elongated spine member extending from said handle, said spine member having a longitudinally extending, depending centering groove, a locking bracket fixed to said handle and extending below said spine, a blade locking assembly on said bracket, said assembly including a draw bar shiftable generally in the direction of said spine, a mounting lever pivotally secured to said spine in spaced relation to said handle, the included angle between said lever and the portion of said spine extending toward said handle being less than 90*, connecting means formed on said lever in spaced relation to said spine and a blade member mounted to said frame, said blade member including a first pivotal connection with said connecting means of said locking lever, and a second connection with said draw bar, said draw bar exerting a force on said blade, the principal components of which are parallel with said spine and toward said handle, whereby the upper edge of said blade is tightly pressed upwardly into said centering groove.
Claim 3
Dependent Claim
17 words
The assembly of claim 1 wherein said draw bar and blade are pivotal relative to each other.
Claim 4
Dependent Claim
24 words
The assembly of claim 2 wherein the point of connection between said blade and draw bar is shiftable toward and away from said spine.
Claim 5
Dependent Claim
43 words
The assembly in accordance with claim 1 wherein said draw bar is actuated by a cam lock means interposed between said bracket and draw bar assembly, said cam lock means being operable to shift said bar generally in the direction of said bracket.
Claim 6
Dependent Claim
137 words
A saw frame for releasibly supporting a generally rectangular saw blade, comprising a handle, an elongated spine extending from said handle, said spine including a longitudinally extending, downwardly directed centering groove, a mounting lever pivotally fixed to said spine in spaced relation to said handle, the included angle bEtween said lever and the portion of said spine extending toward said handle being less than 90*, first connector means on said mounting lever in spaced relation to said spine for pivotal connection to said saw blade, a draw bar mounted on said handle, means for shifting said draw bar longitudinally in the direction of said spine between locking and releasing positions of said blade, said draw bar including second connector means in longitudinal spaced relation to said first connector means, adapted to be pivotally connected to said blade.
Claim 7
Dependent Claim
137 words
A saw frame for releasibly supporting a generally rectangular saw blade, comprising a handle, an elongated spine extending from said handle, said spine including a longitudinally extending, downwardly directed centering groove, a mounting lever pivotally fixed to said spine in spaced relation to said handle, the included angle bEtween said lever and the portion of said spine extending toward said handle being less than 90*, first connector means on said mounting lever in spaced relation to said spine for pivotal connection to said saw blade, a draw bar mounted on said handle, means for shifting said draw bar longitudinally in the direction of said spine between locking and releasing positions of said blade, said draw bar including second connector means in longitudinal spaced relation to said first connector means, adapted to be pivotally connected to said blade.
Claim 8
Dependent Claim
18 words
The assembly of claim 5 wherein said second connector means is shiftable toward and away from said spine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |