US3680607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain saw guide
Assignee: Oregon Tool Inc
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Filing: 1970-06-29
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Granted: 1972-08-01
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Expires: 1990-06-29
Abstract
Abstract A chain saw guide comprising a rigid prong fixed to the outer end of the center bar along which the chain teeth are entrained. The prong includes a center base and an offset extension having an inner edge that overlaps the path of the teeth adjacent to the outer end of the center bar. The prong extends substantially parallel to the sides of the center bar so as to extend outwardly a minimum amount beyond the normal chain saw width. A second form of the attachment is disclosed using two prongs having a common U-shaped inner edge spanning both sides of the center bar at its outer end.
Inventors
- 👤 Vernon S Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:48
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/0083; Y; Y10; Y10T; Y10T83/00; Y10T83/667; Y10T83/68; Y10T83/707; Y10T83/7264
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
An attachment for a chain saw of the type comprising a rigid center bar having substantially parallel side edges along which a cutting tooth chain is entrained, comprising: a rigid prong having a base at one end adapted to be secured to the center bar, and an offset longitudinal extension formed integrally therewith so as to overlap and protrude longitudinally beyond the outer end of one side of a center bar to which the base is secured; said prong including a longitudinal inner edge of substantially straight configuration adapted to overlap the path of the cutting tooth chain of said one side edge; said inneredge being continued across the base of said prong in a smooth curve leading away from the outer end of the center bar to which it is mounted.
Claim 2
Dependent Claim
132 words
An attachment for a chain saw of the type comprising a rigid center bar having substantially parallel side edges along which a cutting tooth chain is entrained, comprising: a rigid prong having a base at one end adapted to be secured to the center bar, and an offset longitudinal extension formed integrally therewith so as to overlap and protrude longitudinally beyond the outer end of one side of a center bar to which the base is secured; said prong including a longitudinal inner edge of substantially straight configuration adapted to overlap the path of the cutting tooth chain of said one side edge; said inneredge being continued across the base of said prong in a smooth curve leading away from the outer end of the center bar to which it is mounted.
Claim 3
Dependent Claim
118 words
An attachment for a chain saw of the type comprising a rigid center bar having substantially parallel side edges along which a cutting tooth chain is entrained, comprising: a rigid prong having a base at one end adapted to be secured to the center bar, and an offset longitudinal extension formed integrally therewith so as to overlap and protrude longitudinally beyond the outer end of one side edge of a center bar to which the base is secured; said prong further including a second offset longitudinal extension formed integrally with said base so as to overlap and protrude longitudinally beyond the outer end of the remaining side edges of a center bar to which the base is secured.
Claim 4
Dependent Claim
118 words
An attachment for a chain saw of the type comprising a rigid center bar having substantially parallel side edges along which a cutting tooth chain is entrained, comprising: a rigid prong having a base at one end adapted to be secured to the center bar, and an offset longitudinal extension formed integrally therewith so as to overlap and protrude longitudinally beyond the outer end of one side edge of a center bar to which the base is secured; said prong further including a second offset longitudinal extension formed integrally with said base so as to overlap and protrude longitudinally beyond the outer end of the remaining side edges of a center bar to which the base is secured.
Claim 5
Dependent Claim
199 words
In combination with a chain saw including: a substantially planar center bar having opposed side edges extending substantially parallel to one another; a cutting tooth chain entrained along the edges of the center bar; and means mounting the center bar and chain for selectively driving the chain relative to the center bar in such fashion as to move the chain about the outer end of the center bar toward a first one of said side edges; an attachment comprising: a rigid prong having a base secured to the center bar and an integral extension overlapping and extending outward substantially parallel to said first side edge of the center bar; said prong being extended outwardly beyond the outer end of said center bar; said prong being located in a plane adjacent and substantially parallel to the plane of the center bar; said prong including a continuous smooth inner edge of substantially straight configuration overlapping the path of teeth on said chain adjacent the outer end of the center bar along said first side edge thereof; said inner edge being continued across the base of said prong in a smooth curve leading away from the outer end of the center bar.
Claim 6
Dependent Claim
199 words
In combination with a chain saw including: a substantially planar center bar having opposed side edges extending substantially parallel to one another; a cutting tooth chain entrained along the edges of the center bar; and means mounting the center bar and chain for selectively driving the chain relative to the center bar in such fashion as to move the chain about the outer end of the center bar toward a first one of said side edges; an attachment comprising: a rigid prong having a base secured to the center bar and an integral extension overlapping and extending outward substantially parallel to said first side edge of the center bar; said prong being extended outwardly beyond the outer end of said center bar; said prong being located in a plane adjacent and substantially parallel to the plane of the center bar; said prong including a continuous smooth inner edge of substantially straight configuration overlapping the path of teeth on said chain adjacent the outer end of the center bar along said first side edge thereof; said inner edge being continued across the base of said prong in a smooth curve leading away from the outer end of the center bar.
Claim 7
Dependent Claim
163 words
In combination with a chain saw including: a substantially planar center bar having opposed side edges extending substantially parallel to one another; a cutting tooth chain entrained along the edges of the center bar; and means mounting the center bar and chain for selectively driving the chain relative to the center bar in such fashion as to move the chain about the outer end of the center bar toward a first one of said side edges; an attachment comprising: a rigid prong having a base secured to the center bar and an integral extension overlapping and extending outward substantially parallel to said first side edge of the center bar; said prong being extended outwardly beyond the outer end of said center bar; said prong being located in a plane adjacent and substantially parallel to the plane of the center bar; a second extension formed integrally with said base overlapping and extending outward substantially parallel to the remaining side edge of the center bar.
Claim 8
Dependent Claim
163 words
In combination with a chain saw including: a substantially planar center bar having opposed side edges extending substantially parallel to one another; a cutting tooth chain entrained along the edges of the center bar; and means mounting the center bar and chain for selectively driving the chain relative to the center bar in such fashion as to move the chain about the outer end of the center bar toward a first one of said side edges; an attachment comprising: a rigid prong having a base secured to the center bar and an integral extension overlapping and extending outward substantially parallel to said first side edge of the center bar; said prong being extended outwardly beyond the outer end of said center bar; said prong being located in a plane adjacent and substantially parallel to the plane of the center bar; a second extension formed integrally with said base overlapping and extending outward substantially parallel to the remaining side edge of the center bar.
Claim 9
Dependent Claim
30 words
The attachment as set out in claim 4 wherein the inner edges of the base and extensions are in a U-shaped configuration spanning the outer end of the center bar.
References Cited (Backward Citations)
US2797717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |