Patent US3734070A successfully refreshed from Google Patents.
US3734070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine body construction of a chain saw
Assignee: Kioritz Corp
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Filing: 1971-09-24
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Granted: 1973-05-22
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Expires: 1991-09-24
Abstract
Abstract In the construction of an engine body of a portable chain saw, a crank case, fuel tank and a lubricating oil tank are made integral. At least a part of the outside of the crank case is surrounded by the lubricating oil tank, and at least a part of the circumference of the latter is surrounded by the fuel tank. A partition wall between the crank case and the lubricating oil tank is provided with a double wall construction having therein a space which opens at either one or both sides thereof, whereby cooling air may be drawn through the inside of the space.
Inventors
- 👤 T Kobayashi
- 👤 H Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:22
CPC Classifications
B; B27; B27B; B27B17/00; F; F01; F01P; F01P1/00; F01P1/02; F02; F02B; F02B63/00; F02B63/02; F02F; F02F1/00; F02F1/002; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
An engine body construction of a chain saw comprising a crank case of an engine, a fuel tank and a lubricating oil tank, wherein said case, said fuel tank and said lubricating oil tank are made integral with each other, at least a part of the outer side of said crank case is surrounded by said lubricating oil tank, and at least a part of the circumference of said lubricating oil tank is surrounded by said fuel tank so that a direct heat-transmission from said crank case to said fuel tank may be shielded by said lubricating oil tank, a partition wall between said crank case and said lubricating oil tank is provided with a double wall construction having therein a space which opens at either one or both sides thereof, whereby cooling air may be drawn through the inside of said space.
Claim 2
Dependent Claim
143 words
An engine body construction of a chain saw comprising a crank case of an engine, a fuel tank and a lubricating oil tank, wherein said case, said fuel tank and said lubricating oil tank are made integral with each other, at least a part of the outer side of said crank case is surrounded by said lubricating oil tank, and at least a part of the circumference of said lubricating oil tank is surrounded by said fuel tank so that a direct heat-transmission from said crank case to said fuel tank may be shielded by said lubricating oil tank, a partition wall between said crank case and said lubricating oil tank is provided with a double wall construction having therein a space which opens at either one or both sides thereof, whereby cooling air may be drawn through the inside of said space.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |