US3754328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard for power chain saw
Assignee: Individual
•
Filing: 1972-05-01
•
Granted: 1973-08-28
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Expires: 1992-05-01
Abstract
Abstract For a power chain saw having a guide bar and chain saw element, a guard which includes brackets mounted on said guide bar upon which a framework is pivotally mounted to protectively enclose the chain saw element throughout its length and height together with stops on said brackets for initially maintaining the framework to enclose said chain saw element together with a spring for biasing said framework into normal protective position.
Inventors
- 👤 W Knerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:12
CPC Classifications
B; B27; B27G; B27G19/00; B27G19/003; B27B; B27B7/00; B27B7/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
In a power chain saw having a forwardly extending guide bar with a longitudinal axis and a chain saw element movably and guidably mounted upon and around said guide bar; a pair of opposed brackets mounted upon and secured to opposite sides of said guide bar adjacent its rear end and extending at approximately right angles to said axis; a pair of opposed aligned pivot studs respectively connected to upper portions of said brackets and extending outwardly; a pair of opposed aligned stop studs respectively connected to lower portions of said brackets and extending outwardly thereof; and a saw guard comprising a hollow framework protectively enclosing said guide bar and chain saw element throughout its length and height and at its rear end pivotally mounted upon said pivot studs; rear portions of said framework bearing against said stop studs normally retaining said guard in position to enclose said bar and chain saw element; and spring means interposed between one bracket and said framework normally biasing said frame work against said stop studs.
Claim 2
Dependent Claim
172 words
In a power chain saw having a forwardly extending guide bar with a longitudinal axis and a chain saw element movably and guidably mounted upon and around said guide bar; a pair of opposed brackets mounted upon and secured to opposite sides of said guide bar adjacent its rear end and extending at approximately right angles to said axis; a pair of opposed aligned pivot studs respectively connected to upper portions of said brackets and extending outwardly; a pair of opposed aligned stop studs respectively connected to lower portions of said brackets and extending outwardly thereof; and a saw guard comprising a hollow framework protectively enclosing said guide bar and chain saw element throughout its length and height and at its rear end pivotally mounted upon said pivot studs; rear portions of said framework bearing against said stop studs normally retaining said guard in position to enclose said bar and chain saw element; and spring means interposed between one bracket and said framework normally biasing said frame work against said stop studs.
Claim 3
Dependent Claim
66 words
In the power chain saw of claim 1, said framework comprising a pair of parallel spaced elongated frames; and a pair of parallel vertically spaced cross bars interconnecting forward end portions of said frame; each frame at its rear upper end portion having a transverse aperture receiving said pivot studs; rear portions of each frame being inclined downwardly and forwardly and registerable with said stop studs.
Claim 4
Dependent Claim
17 words
In the power chain saw of claim 2, fasteners on said pivot studs retainingly engaging said frames.
Claim 5
Dependent Claim
24 words
In the power saw of claim 1, said brackets having opposed concave recesses at their upper ends providing clearance for said chain saw element.
Claim 6
Dependent Claim
41 words
In the power chain saw of claim 1, said framework being open along its top and bottom and engageable with a work piece as the saw element progresses thereinto, so that the framework is cammed progressively upward around its pivot mounting.
Claim 7
Dependent Claim
34 words
In the power chain saw of claim 1, said spring means at one end being connected to one of said frames intermediate its ends, and at its other end connected to a stop stud.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |