US4393590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw guide bar
Assignee: Santrade Ltd
•
Filing: 1981-09-17
•
Granted: 1983-07-19
•
Expires: 2001-09-17
Abstract
Abstract This invention relates to a saw guide bar comprising two side plates and an intermediate layer. Each side plate comprises a layer of reinforced plastic material and a layer of metal.
Inventors
- 👤 Glenn G. E. Pantzar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:27
CPC Classifications
B; B27; B27B; B27B17/00; B27B17/02; B27B17/025; B27B17/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A chain saw guide bar comprising two side plates and an intermediate layer, each of said side plates comprising an outer layer of fiber-reinforced plastic material and an inner layer of metal which is glued to said outer layer, said intermediate layer being of less height than said inner layers such that said inner layers and said intermediate layers form a guide track for a saw chain.
Claim 2
Dependent Claim
67 words
A chain saw guide bar comprising two side plates and an intermediate layer, each of said side plates comprising an outer layer of fiber-reinforced plastic material and an inner layer of metal which is glued to said outer layer, said intermediate layer being of less height than said inner layers such that said inner layers and said intermediate layers form a guide track for a saw chain.
Claim 3
Dependent Claim
23 words
A guide bar according to claim 1, wherein the reinforcement fibers for said outer layer comprise carbon, boron, metal, glass or aramide fibers.
Claim 4
Dependent Claim
17 words
A guide bar according to claim 1, wherein said intermediate layer comprises a cell structure of metal.
Claim 5
Dependent Claim
20 words
A guide bar according to claim 3, wherein the cells are of hexagonal section and are arranged in honeycomb relationship.
Claim 6
Dependent Claim
29 words
A guide bar according to claim 4, wherein said inner layers each include weight-reducing holes, portions of said intermediate layer protrude into said holes and abut said outer layers.
Claim 7
Dependent Claim
21 words
A guide bar according to claim 1, wherein said intermediate layer includes at least one longitudinal channel for conducting lubrication oil.
Claim 8
Dependent Claim
27 words
A guide bar according to claim 6 including at least one lateral channel extending laterally from said longitudinal channel and communicating the latter with said guide track.
Claim 9
Dependent Claim
25 words
A guide bar according to claim 1, wherein said intermediate layer is fastened by gluing to said side plates and by at least one rivet.
Claim 10
Dependent Claim
16 words
A guide bar according to claim 1, wherein said inner layers each include weight reducing holes.
Claim 11
Dependent Claim
33 words
A guide bar according to claim 9, wherein the weight reducing holes are spaced apart to create bridge portions of said inner layer which interconnect upper and lower portions of said inner layer.
Claim 12
Dependent Claim
26 words
A guide bar according to claim 1 including a toothed idler sprocket rotatably mounted between said inner layers such that the latter form guide surfaces therefor.
Claim 13
Dependent Claim
15 words
A guide bar according to claim 1, wherein said inner layer is formed of steel.
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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |