US5027761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operating mechanism for internal combustion engine with a spark plug insertion hole in a rocker arm holder
Assignee: Honda Motor Co Ltd
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Filing: 1989-10-02
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Granted: 1991-07-02
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Expires: 2009-10-02
Abstract
Abstract An internal combustion engine includes a cylinder block having a cylinder bore, a cylinder head having a combustion chamber communicating with the cylinder bore, a spark plug supported in the cylinder head and having electrodes disposed in the combustion chamber, two first valves supported on the cylinder head and having valve heads disposed in one side of the combustion chamber, and two second valves supported on the cylinder head and having valve heads disposed in an opposite side of the combustion chamber. A valve operating mechanism associated with the internal combustion engine comprises a camshaft rotatably mounted on the cylinder head and engaging the first valves for operating the first valves, a rocker arm holder mounted on the cylinder head, a rocker arm shaft or shafts disposed between the camshaft and the second valves and rotatably supported by the rocker arm holder, and two rocker arms swingably mounted on the rocker arm shaft or shafts and held in engagement with the camshaft and the second valves for operating the second valves. The rocker arm holder is disposed above the cylinder bore in substantial central alignment therewith, the rocker arm holder having a plug insertion hole for insertion of the spark plug therethrough.
Inventors
- 👤 Noriaki Fujii
- 👤 Takeshi Iwata
- 👤 Naoki Takahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:38
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/242; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L1/26; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/20; F02F1/42; F02F1/4214; F02F2001/244; F02F2001/245; F02F2001/247
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
141 words
In a valve operating mechanism for an internal combustion engine of a single overhead camshaft (SOHC) type having, a cylinder block having a cylinder bore, a cylinder head, spark plug, at least one intake valve, at least one exhaust valve, a camshaft, a rocker arm shaft, a camshaft holder mounted on the cylinder head and rotatably supporting the camshaft, and a rocker arm holder mounted on the cylinder head and supporting the rocker arm shaft, the improvement comprising: said cylinder head having thereon a first upper surface on which said camshaft holder is mounted and a second upper surface on which said rocker arm holder is mounted wherein said first and second upper surfaces lie flush with each other in the same plane, and said rocker arm holder having a plug insertion hole portion for inserting of said spark plug therethrough.
Claim 2
Dependent Claim
141 words
In a valve operating mechanism for an internal combustion engine of a single overhead camshaft (SOHC) type having, a cylinder block having a cylinder bore, a cylinder head, spark plug, at least one intake valve, at least one exhaust valve, a camshaft, a rocker arm shaft, a camshaft holder mounted on the cylinder head and rotatably supporting the camshaft, and a rocker arm holder mounted on the cylinder head and supporting the rocker arm shaft, the improvement comprising: said cylinder head having thereon a first upper surface on which said camshaft holder is mounted and a second upper surface on which said rocker arm holder is mounted wherein said first and second upper surfaces lie flush with each other in the same plane, and said rocker arm holder having a plug insertion hole portion for inserting of said spark plug therethrough.
Claim 3
Dependent Claim
32 words
The valve operating mechanism as claimed in claim 1, wherein said rocker arm holder includes a tubular portion defining therethrough said plug insertion hole portion in which said spark plug is disposed.
Claim 4
Dependent Claim
28 words
The valve operating mechanism as claimed in claim 1, wherein said camshaft holder and said plug insertion hole portion are arrayed into a line on the cylinder head.
Claim 5
Dependent Claim
43 words
The valve operating mechanism as claimed in claim 1, wherein said camshaft holder and said plug insertion hole portion are disposed substantially along a plane which intersects the central bore axis of said cylinder bore and intersects at right angles to said camshaft.
Claim 6
Dependent Claim
166 words
In a valve operating mechanism for an internal combustion engine of a single overhead camshaft (SOHC) type having a cylinder block having a cylinder bore, a cylinder head, a spark plug, at least one intake valve, at least one exhaust valve, a camshaft a rocker arm shaft, a camshaft holder mounted on the cylinder head and rotatably supporting the camshaft, and a rocker arm holder mounted on the cylinder head and supporting the rocker arm shaft, the improvement comprising: said cylinder head having thereon a first upper surface on which said camshaft holder is mounted and a second upper surface on which said rocker arm holder is mounted wherein said first and second upper surfaces lie flush with each other in the same plane, said rocker arm holder having a tubular portion defining therethrough a plug insertion hole in which said spark plug is disposed, and said camshaft holder, said rocker arm holder and said tubular portion are arrayed into a line on the cylinder head.
Claim 7
Dependent Claim
166 words
In a valve operating mechanism for an internal combustion engine of a single overhead camshaft (SOHC) type having a cylinder block having a cylinder bore, a cylinder head, a spark plug, at least one intake valve, at least one exhaust valve, a camshaft a rocker arm shaft, a camshaft holder mounted on the cylinder head and rotatably supporting the camshaft, and a rocker arm holder mounted on the cylinder head and supporting the rocker arm shaft, the improvement comprising: said cylinder head having thereon a first upper surface on which said camshaft holder is mounted and a second upper surface on which said rocker arm holder is mounted wherein said first and second upper surfaces lie flush with each other in the same plane, said rocker arm holder having a tubular portion defining therethrough a plug insertion hole in which said spark plug is disposed, and said camshaft holder, said rocker arm holder and said tubular portion are arrayed into a line on the cylinder head.
Claim 8
Dependent Claim
23 words
The valve operating mechanism as claimed in claim 5, wherein said camshaft holder and said rocker arm holder are a single integrally-formed member.
Claim 9
Dependent Claim
19 words
The valve operating mechanism as claimed in claim 6, wherein said single integrally-formed member includes therein said tubular portion.
Claim 10
Dependent Claim
45 words
The valve operating mechanism as claimed in claim 5, wherein said camshaft holder, said rocker arm holder and said tubular portion are disposed substantially along a plane which intersects the central bore axis of said cylinder bore and intersects at right angles to said camshaft.
Claim 11
Dependent Claim
236 words
In a valve operating mechanism in an internal combustion engine including a cylinder block having a cylinder bore, a cylinder head having a combustion chamber communicating with the cylinder bore, a spark plug supported in the cylinder head and having electrodes disposed in the combustion chamber, two first valves supported on the cylinder head and having valve heads disposed in one side of said combustion chamber, two second valves supported on the cylinder head and having valve heads disposed in an opposite side of the combustion chamber, a camshaft holder mounted on the cylinder head, a camshaft rotatably supported by the camshaft holder and operating the first valves, a rocker arm holder mounted on the cylinder head, rocker arm shaft means disposed between the camshaft and upper ends of the second valves and supported by the rocker arm holder, and two rocker arms swingably mounted on the rocker arm shaft means and held in engagement with the camshaft and the upper ends of the second valves for operating the second valves, the improvement, comprising: said cylinder head having thereon a first upper surface on which said camshaft holder is mounted and a second upper surface on which said rocker arm holder is mounted wherein said first and second upper surfaces lie flush with each other in the same plane, and said rocker arm holder having a plug insertion hole for inserting of said spark plug therethrough.
Claim 12
Dependent Claim
236 words
In a valve operating mechanism in an internal combustion engine including a cylinder block having a cylinder bore, a cylinder head having a combustion chamber communicating with the cylinder bore, a spark plug supported in the cylinder head and having electrodes disposed in the combustion chamber, two first valves supported on the cylinder head and having valve heads disposed in one side of said combustion chamber, two second valves supported on the cylinder head and having valve heads disposed in an opposite side of the combustion chamber, a camshaft holder mounted on the cylinder head, a camshaft rotatably supported by the camshaft holder and operating the first valves, a rocker arm holder mounted on the cylinder head, rocker arm shaft means disposed between the camshaft and upper ends of the second valves and supported by the rocker arm holder, and two rocker arms swingably mounted on the rocker arm shaft means and held in engagement with the camshaft and the upper ends of the second valves for operating the second valves, the improvement, comprising: said cylinder head having thereon a first upper surface on which said camshaft holder is mounted and a second upper surface on which said rocker arm holder is mounted wherein said first and second upper surfaces lie flush with each other in the same plane, and said rocker arm holder having a plug insertion hole for inserting of said spark plug therethrough.
Claim 13
Dependent Claim
25 words
The valve operating mechanism as claimed in claim 9, wherein said camshaft holder and said rocker arm holder are formed of a unit holder member.
Claim 14
Dependent Claim
25 words
The valve operating mechanism as claimed in claim 9, wherein said camshaft holder and said rocker arm holder are formed with an integrally-formed holder member.
Claim 15
Dependent Claim
48 words
The valve operating mechanism as claimed in claim 9, wherein said cylinder head further includes thereon a third upper surface on which a cover for the cylinder head is mounted wherein said third upper surface lies flush with said first and second upper surfaces in the same plane.
Claim 16
Dependent Claim
31 words
The valve operating mechanism as claimed in claim 9, wherein said rocker arm holder includes a tubular portion defining therethrough said plug insertion hole in which said spark plug is disposed.
Claim 17
Dependent Claim
28 words
The valve operating mechanism as claimed in claim 13, wherein said camshaft holder, rocker arm holder and tubular portion are arrayed into a line on the cylinder head.
Claim 18
Dependent Claim
201 words
In a valve operating mechanism in an internal combustion engine including a cylinder block having a cylinder bore, a cylinder head having a combustion chamber communicating with the cylinder bore, a spark plug supported in the cylinder head and having electrodes disposed in the combustion chamber, two first valves supported on the cylinder head and having valve heads disposed in one side of said combustion chamber, two second valves supported on the cylinder head and having valve heads disposed in an opposite side of the combustion chamber, a camshaft holder mounted on the cylinder head, a camshaft rotatably supported by the camshaft holder and operating the first valves, a rocker arm holder mounted on the cylinder head, rocker arm shaft means disposed between the camshaft and upper ends of the second valves supported by the rocker arm holder, and two rocker arms swingably mounted on the rocker arm shaft means and held in engagement with the camshaft and the upper ends of the second valves for operating the second valves, the improvement comprising: said camshaft holder and said rocker arm holder being formed of a single integrally-formed holder member and having a plug insertion hole for inserting said spark plug therethrough.
Claim 19
Dependent Claim
201 words
In a valve operating mechanism in an internal combustion engine including a cylinder block having a cylinder bore, a cylinder head having a combustion chamber communicating with the cylinder bore, a spark plug supported in the cylinder head and having electrodes disposed in the combustion chamber, two first valves supported on the cylinder head and having valve heads disposed in one side of said combustion chamber, two second valves supported on the cylinder head and having valve heads disposed in an opposite side of the combustion chamber, a camshaft holder mounted on the cylinder head, a camshaft rotatably supported by the camshaft holder and operating the first valves, a rocker arm holder mounted on the cylinder head, rocker arm shaft means disposed between the camshaft and upper ends of the second valves supported by the rocker arm holder, and two rocker arms swingably mounted on the rocker arm shaft means and held in engagement with the camshaft and the upper ends of the second valves for operating the second valves, the improvement comprising: said camshaft holder and said rocker arm holder being formed of a single integrally-formed holder member and having a plug insertion hole for inserting said spark plug therethrough.
Claim 20
Dependent Claim
49 words
The valve operating mechanism as claimed in claim 15, wherein said cylinder head has thereon a first upper surface on and a second upper surface on which said holder member is mounted and wherein said first and second upper surfaces lie flush with each other in the same plane.
Claim 21
Dependent Claim
48 words
The valve operating mechanism as claimed in claim 16, wherein said cylinder head further includes thereon a third upper surface on which a cover for the cylinder head is mounted wherein said third upper surface lies flush with said first and second upper surfaces in the same plane.
Claim 22
Dependent Claim
31 words
The valve operating mechanism as claimed in claim 15, wherein said rocker arm holder includes a tubular portion defining therethrough said plug insertion hole in which said spark plug is disposed.
Claim 23
Dependent Claim
28 words
The valve operating mechanism as claimed in claim 18, wherein said camshaft holder, rocker arm holder and tubular portion are arrayed into a line on the cylinder head.
Claim 24
Dependent Claim
45 words
The valve operating mechanism as claimed in claim 18, wherein said camshaft holder, said rocker arm holder and said tubular portion are disposed substantially along a plane which intersects the central bore axis of said cylinder bore and intersects at right angles to said camshaft.
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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) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |