US4401064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocker arm fitting structure
Assignee: Piolax Inc
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Filing: 1981-02-13
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Granted: 1983-08-30
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Expires: 2001-02-13
Abstract
Abstract In a mechanism for actuating valves of an internal combustion engine, in place of a conventional coil spring, a holding member formed at least partly like a leaf spring is used to hold resiliently a plurality of rocker arms in position. The holding member together with a rocker shaft is fixed to a support member, for example, by means of a bolt. A holding portion of the holding member can be formed at one end or both ends of a body portion of the holding member.
Inventors
- 👤 Makoto Nakamura
- 👤 Toshinari Hojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:24
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/46; F01L1/12; F01L1/18; F01L1/181
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
A mechanism for actuating a valve of an internal combustion engine, comprising: a rocker shaft; a rocker arm fitted to the rocker shaft; a holding member at least partly made of an elastic material formed in a plate-shape for resiliently holding the rocker arm in position on said shaft; the holding member including: a pressing piece for biasing the rocker arm along the rocker shaft; and a receiving piece facing the pressing piece for receiving the rocker arm so that the rocker arm can be positioned between the pressing and receiving piece.
Claim 2
Dependent Claim
92 words
A mechanism for actuating a valve of an internal combustion engine, comprising: a rocker shaft; a rocker arm fitted to the rocker shaft; a holding member at least partly made of an elastic material formed in a plate-shape for resiliently holding the rocker arm in position on said shaft; the holding member including: a pressing piece for biasing the rocker arm along the rocker shaft; and a receiving piece facing the pressing piece for receiving the rocker arm so that the rocker arm can be positioned between the pressing and receiving piece.
Claim 3
Dependent Claim
27 words
A mechanism as recited in claim 1, wherein the holding member includes a body portion formed substantially in a trapezoidal shape and fixed to the rocker shaft.
Claim 4
Dependent Claim
44 words
A mechanism as recited in claim 1, wherein the holding member includes a body portion fixed to the rocker shaft and a pair of holding portions formed at both ends of the body portion for holding the rocker arms by the biasing force thereof.
Claim 5
Dependent Claim
64 words
A mechanism as recited in claim 1, further comprising another rocker shaft; another rocker arm fitted to said other rocker shaft; a cam positioned for contacting a portion of said other rocker arm for actuating same; and said one rocker shaft having means for feeding a lubricating oil to a region of contact of said cam and said portion of said other rocker arm.
Claim 6
Dependent Claim
59 words
A mechanism as recited in claim 4, wherein the feeding means includes a long hole formed in said one rocker shaft in the axial direction thereof and a small opening formed therein to be connected with the long hole in such a manner that the lubricating oil can be sprayed through the small opening onto said region of contact.
Claim 7
Dependent Claim
109 words
A mechanism for actuating valves of an internal combustion engine, comprising: a rocker shaft; a plurality of rocker arms fitted to the rocker shaft; a holding member at least partly made of an elastic material formed in a plate-shape for resiliently holding the rocker arms in position; and a support member for fixing the holding member together with the rocker shaft thereto, the holding member including: a pair of pressing pieces for biasing the rocker arms along the rocker shaft; and a pair of receiving pieces facing the pressing pieces for receiving the rocker arms so that the rocker arms can be positioned between the pressing and receiving pieces.
Claim 8
Dependent Claim
109 words
A mechanism for actuating valves of an internal combustion engine, comprising: a rocker shaft; a plurality of rocker arms fitted to the rocker shaft; a holding member at least partly made of an elastic material formed in a plate-shape for resiliently holding the rocker arms in position; and a support member for fixing the holding member together with the rocker shaft thereto, the holding member including: a pair of pressing pieces for biasing the rocker arms along the rocker shaft; and a pair of receiving pieces facing the pressing pieces for receiving the rocker arms so that the rocker arms can be positioned between the pressing and receiving pieces.
Claim 9
Dependent Claim
62 words
A mechanism as claimed in claim 6, wherein the holding member further includes: a body portion fixed to the rocker shaft; and a connecting portion formed like a leaf spring for connecting the pressing portions with an end of the body portion, the connecting portion being formed in such a shape as to be arranged over a portion of each rocker arm.
Claim 10
Dependent Claim
110 words
A mechanism for actuating valves of an internal combustion engine, comprising: a rocker shaft; a plurality of rocker arms fitted to the rocker shaft; a holding member at least partly made of an elastic material formed in a plate-shape for resiliently holding the rocker arms in position; and a support member for fixing the holding member together with the rocker shaft thereto, wherein the rocker shaft has a stepped portion, and the holding member has a stepped portion corresponding to the stepped portion of the rocker shaft in such a manner that the stepped portion of the holding member can be fitted onto the stepped portion of the rocker shaft.
Claim 11
Dependent Claim
110 words
A mechanism for actuating valves of an internal combustion engine, comprising: a rocker shaft; a plurality of rocker arms fitted to the rocker shaft; a holding member at least partly made of an elastic material formed in a plate-shape for resiliently holding the rocker arms in position; and a support member for fixing the holding member together with the rocker shaft thereto, wherein the rocker shaft has a stepped portion, and the holding member has a stepped portion corresponding to the stepped portion of the rocker shaft in such a manner that the stepped portion of the holding member can be fitted onto the stepped portion of the rocker shaft.
Claim 12
Dependent Claim
54 words
A mechanism as defined in claim 8, wherein the stepped portion of the holding member has a hole, and the stepped portion of the rocker shaft has a hole so that a common bolt can be screwed into the holes thereby fixing the holding member and the rocker shaft together to the support member.
Claim 13
Dependent Claim
24 words
A mechanism as defined in claims 6, 8 or 1, wherein the holding member is formed like a leaf spring as an integral unit.
Claim 14
Dependent Claim
29 words
A mechanism as defined in claims 6 or 8, wherein the holding member includes a body portion formed substantially in a trapezoidal shape and fixed to the rocker shaft.
Claim 15
Dependent Claim
46 words
A mechanism as defined in claims 6 or 8, wherein the holding member includes a body portion fixed to the rocker shaft and a pair of holding portions formed at both ends of the body portion for holding the rocker arms by the biasing force thereof.
Claim 16
Dependent Claim
80 words
A mechanism as defined in claims 6, 7, 8 or 9, further comprising another rocker shaft; another plurality of rocker arms fitted to said other rocker shaft; a cam positioned for contacting a portion of one of said another plurality of rocker arms for actuating same; and said one rocker shaft having means for feeding lubricating oil to a region of contact of said cam and said portion of said one rocker arm of said another plurality of rocker arms.
Claim 17
Dependent Claim
59 words
A mechanism as defined in claim 13, wherein the feeding means includes a long hole formed in said one rocker shaft in the axial direction thereof and a small opening formed therein to be connected with the long hole in such a manner that the lubricating oil can be sprayed through the small opening onto said region of contact.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |