Patent US4611521A successfully refreshed from Google Patents.
US4611521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain saw attachment
Assignee: Individual
•
Filing: 1984-06-12
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Granted: 1986-09-16
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Expires: 2004-06-12
Abstract
Abstract An attachment for a chain saw has a bracket to be bolted to the cutting bar of the saw so that a pivot arm extends on either side of the bracket providing a multi-purpose safety bar for the saw. The pivot arm fits in a support frame enabling the saw to be used for cross-cutting, ripping, or radial cuts.
Inventors
- 👤 Gordon R. McCardle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:55
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/0083; B27B17/0041; B27B17/0058; Y; Y10; Y10T; Y10T83/00; Y10T83/707; Y10T83/7101; Y10T83/7114; Y10T83/869; Y10T83/8763
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
An attachment for a chainsaw having an elongated cutting bar, including a bracket adapted to be secured by fasteners to said cutting bar, a pivot arm extending from either side of said bracket in a line substantially orthogonal to the length of said cutting bar and below said fasteners, whereby in use said pivot arm can act as a guard to reduce the risk of operator injury with a hand-wielded chainsaw, an open support frame having pivot supports on either side thereof for reception of said pivot arm, and a substantially vertical post which can swivel and on which said open support frame is mounted.
Claim 2
Dependent Claim
105 words
An attachment for a chainsaw having an elongated cutting bar, including a bracket adapted to be secured by fasteners to said cutting bar, a pivot arm extending from either side of said bracket in a line substantially orthogonal to the length of said cutting bar and below said fasteners, whereby in use said pivot arm can act as a guard to reduce the risk of operator injury with a hand-wielded chainsaw, an open support frame having pivot supports on either side thereof for reception of said pivot arm, and a substantially vertical post which can swivel and on which said open support frame is mounted.
Claim 3
Dependent Claim
32 words
In combination a chain saw and an attachment as claimed in claim 1, with said bracket secured to the cutting bar of the chain saw by bolts passing through the cutting bar.
Claim 4
Dependent Claim
20 words
An attachment as claimed in claim 1 and further including a bucking spike on a forward portion of said bracket.
Claim 5
Dependent Claim
41 words
An attachment as claimed in claim 3 wherein said support frame has two side limbs and an end member defining a substantially "U"-shaped frame, and said frame has a back stop support member extending inwardly from one of said side limbs.
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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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |