US5094200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight composite engine valve
Assignee: Ford Global Technologies LLC
•
Filing: 1991-05-28
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Granted: 1992-03-10
•
Expires: 2011-05-28
Abstract
Abstract A composite intake or exhaust valve for an internal combustion engine is disclosed. The composite engine valve comprises a valve head of lightweight, heat resistant metal alloy material and a valve stem of lightweight, heat resistant ceramic based material. The valve head has an integral valve head insert around which the valve stem is molded to integrate the valve head and valve stem into a composite valve. The valve head insert is provided with anti-rotation means to prevent rotation of the valve head relative to the valve stem during use. The valve head insert is also provided with anti-tension means to prevent separation of the valve head from the valve stem during use.
Inventors
- 👤 Dominic Fontichiaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:49
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
152 words
A composite engine valve for use within a combustion chamber having a valve seat, said composite engine valve comprising: a valve head of substantially lightweight, heat resistant metal alloy material; a valve head insert of substantially lightweight, heat resistant metal alloy material integrally extending from said valve head and having head anti-rotation means for resisting rotational forces on the valve head during operation as said valve head impacts the valve seat within the combustion chamber, and head anti-tension means for resisting tension forces on said valve head during operation as said valve head is returned to a normally closed biased position on the valve seat within the combustion chamber; and a valve stem of substantially lightweight, heat resistant ceramic base material molded about said valve head insert and receiving said head anti-rotation means and said head anti-tension means whereby said valve head and valve stem are permanently fixed relative to each other.
Claim 2
Dependent Claim
152 words
A composite engine valve for use within a combustion chamber having a valve seat, said composite engine valve comprising: a valve head of substantially lightweight, heat resistant metal alloy material; a valve head insert of substantially lightweight, heat resistant metal alloy material integrally extending from said valve head and having head anti-rotation means for resisting rotational forces on the valve head during operation as said valve head impacts the valve seat within the combustion chamber, and head anti-tension means for resisting tension forces on said valve head during operation as said valve head is returned to a normally closed biased position on the valve seat within the combustion chamber; and a valve stem of substantially lightweight, heat resistant ceramic base material molded about said valve head insert and receiving said head anti-rotation means and said head anti-tension means whereby said valve head and valve stem are permanently fixed relative to each other.
Claim 3
Dependent Claim
94 words
The composite engine valve of claim 1 further comprising: a valve cap of substantially lightweight, heat resistant metal alloy material; a valve cap insert of substantially lightweight, heat resistant metal alloy material integrally extending from said valve cap, said valve cap insert having cap anti-tension means for resisting tension forces and cap anti-rotation means for resisting rotational forces, said valve stem being molded about said valve cap insert and receiving said cap anti-tension means and said cap anti-rotation means whereby said valve cap and said valve stem are permanently fixed relative to each other.
Claim 4
Dependent Claim
42 words
The composite engine valve of claim 1 wherein: said head anti-tension means comprises a plurality of annular ribs in said valve head insert; and said head anti-rotation means comprises a plurality of circumferentially equally spaced longitudinal grooves in said valve head insert.
Claim 5
Dependent Claim
48 words
The composite engine valve of claim 2 wherein; said cap anti-tension means comprises a plurality of annular ribs in said valve cap insert; and said cap anti-rotation means comprises a plurality of circumferentially equally spaced slots and complementary flanges in said annular ribs of said valve cap insert.
Claim 6
Dependent Claim
25 words
The composite engine valve of claim 4 wherein said slots and flanges in said annular ribs of said valve cap insert have approximately equal widths.
Claim 7
Dependent Claim
30 words
The composite engine valve of claim 1 wherein: said valve head and said valve head insert are a titanium alloy material; and said valve stem is a ceramic-plastic matrix material.
Claim 8
Dependent Claim
21 words
The composite engine valve of claim 2 wherein said valve cap and said valve cap insert are a titanium alloy material.
Claim 9
Dependent Claim
213 words
A composite engine valve for use within a combustion chamber having a valve seat, said composite engine valve comprising: a valve head of substantially lightweight, heat resistant metal alloy material having an undersurface that sealingly engages the valve seat; a valve head insert of substantially lightweight, heat resistant metal alloy material integrally extending from said valve head, said valve head insert having a tapered portion extending from said valve head, a cylindrical portion extending from said tapered portion, head anti-rotation means for resisting rotational forces on said valve head during operation as said valve head impacts the valve seat within the combustion chamber, and head anti-tension means for resisting tension forces on said valve head during operation as said valve head is returned to a normally closed biased position on the valve seat within the combustion chamber, wherein said tapered portion of said valve head insert follows an arcuate path of generally fixed radius from said undersurface of said valve head to said cylindrical portion of said valve head insert; and a valve stem of substantially lightweight, heat resistant ceramic base material molded about said valve head insert and receiving said head anti-rotation means and said head anti-tension means whereby said valve head and valve stem are permanently fixed relative to each other.
Claim 10
Dependent Claim
213 words
A composite engine valve for use within a combustion chamber having a valve seat, said composite engine valve comprising: a valve head of substantially lightweight, heat resistant metal alloy material having an undersurface that sealingly engages the valve seat; a valve head insert of substantially lightweight, heat resistant metal alloy material integrally extending from said valve head, said valve head insert having a tapered portion extending from said valve head, a cylindrical portion extending from said tapered portion, head anti-rotation means for resisting rotational forces on said valve head during operation as said valve head impacts the valve seat within the combustion chamber, and head anti-tension means for resisting tension forces on said valve head during operation as said valve head is returned to a normally closed biased position on the valve seat within the combustion chamber, wherein said tapered portion of said valve head insert follows an arcuate path of generally fixed radius from said undersurface of said valve head to said cylindrical portion of said valve head insert; and a valve stem of substantially lightweight, heat resistant ceramic base material molded about said valve head insert and receiving said head anti-rotation means and said head anti-tension means whereby said valve head and valve stem are permanently fixed relative to each other.
Claim 11
Dependent Claim
94 words
The composite engine valve of claim 8 further comprising: a valve cap of substantially lightweight, heat resistant metal alloy material; a valve cap insert of substantially lightweight, heat resistant metal alloy material integrally extending from said valve cap, said valve cap insert having cap anti-tension means for resisting tension forces and cap anti-rotation means for resisting rotational forces, said valve stem being molded about said valve cap insert and receiving said cap anti-tension means and said cap anti-rotation means whereby said valve cap and said valve stem are permanently fixed relative to each other.
Claim 12
Dependent Claim
51 words
The composite engine valve of claim 8 wherein: said head anti-tension means comprises a plurality of annular ribs in said generally cylindrical portion of said valve head insert; and said head anti-rotation means comprises a plurality of circumferentially equally spaced longitudinal grooves in said tapered portion of said valve head insert.
Claim 13
Dependent Claim
48 words
The composite engine valve of claim 9 wherein: said cap anti-tension means comprises a plurality of annular ribs in said valve cap insert; and said cap anti-rotation means comprises a plurality of circumferentially equally spaced slots and complementary flanges in said annular ribs of said valve cap insert.
Claim 14
Dependent Claim
25 words
The composite engine valve of claim 11 wherein said slots and flanges in said annular ribs of said valve cap insert have approximately equal widths.
Claim 15
Dependent Claim
30 words
The composite engine valve of claim 8 wherein: said valve head and said valve head insert are a titanium alloy material; and said valve stem is a ceramic-plastic matrix material.
Claim 16
Dependent Claim
21 words
The composite engine valve of claim 9 wherein said valve cap and said valve cap insert are a titanium alloy material.
Claim 17
Dependent Claim
270 words
A composite engine valve for use within a combustion chamber having a valve seat, said composite engine valve comprising: a valve head of substantially lightweight, heat resistant metal alloy material having an undersurface that sealingly engages the valve seat; a valve head stem of substantially lightweight, heat resistant metal alloy material integrally extending from said valve head, said valve head stem having a tapered portion extending from said valve head and a stem portion extending from said tapered portion wherein said tapered portion of said valve head stem follows an arcuate path of generally fixed radius from said undersurface of said valve head to said stem portion of said valve head stem; a valve head insert of substantially lightweight, heat resistant metal alloy material integrally extending from said stem portion of said valve head stem, said valve head insert having a reduced diameter relative to said stem portion, head anti-tension means for resisting tension forces on said valve head during operation as said valve head impacts the valve seat within the combustion chamber, and head anti-tension means for resisting tension forces on said valve head during operation as said valve head is returned to a normally closed biased position on the valve seat within the combustion chamber; and a valve stem of substantially lightweight, heat resistant ceramic base material having an outside diameter equal to that of said stem portion of said valve head stem, said valve stem being molded about said valve head insert and receiving said head anti-rotation means and said head anti-tension means whereby said valve head and valve stem are permanently fixed relative to each other.
Claim 18
Dependent Claim
270 words
A composite engine valve for use within a combustion chamber having a valve seat, said composite engine valve comprising: a valve head of substantially lightweight, heat resistant metal alloy material having an undersurface that sealingly engages the valve seat; a valve head stem of substantially lightweight, heat resistant metal alloy material integrally extending from said valve head, said valve head stem having a tapered portion extending from said valve head and a stem portion extending from said tapered portion wherein said tapered portion of said valve head stem follows an arcuate path of generally fixed radius from said undersurface of said valve head to said stem portion of said valve head stem; a valve head insert of substantially lightweight, heat resistant metal alloy material integrally extending from said stem portion of said valve head stem, said valve head insert having a reduced diameter relative to said stem portion, head anti-tension means for resisting tension forces on said valve head during operation as said valve head impacts the valve seat within the combustion chamber, and head anti-tension means for resisting tension forces on said valve head during operation as said valve head is returned to a normally closed biased position on the valve seat within the combustion chamber; and a valve stem of substantially lightweight, heat resistant ceramic base material having an outside diameter equal to that of said stem portion of said valve head stem, said valve stem being molded about said valve head insert and receiving said head anti-rotation means and said head anti-tension means whereby said valve head and valve stem are permanently fixed relative to each other.
Claim 19
Dependent Claim
33 words
The composite engine valve of claim 15 wherein: said valve head, valve head stem and said valve head insert are a titanium alloy material; and said valve stem is a ceramic-plastic matrix material.
Claim 20
Dependent Claim
65 words
The composite engine valve of claim 15 wherein: said head anti-tension means comprises a plurality of annular ribs in said valve head insert; said head anti-rotation means comprises a plurality of circumferentially equally spaced slots and complementary flanges in said annular ribs of said valve head insert; and said slots and flanges in said annular ribs of said valve head insert having approximately equal widths.
Claim 21
Dependent Claim
127 words
The composite engine valve of claim 15 further comprising: a valve cap of substantially lightweight, heat resistant metal alloy material and including; a valve cap insert integrally extending from said valve cap; said valve cap insert having cap anti-tension means for resisting tension forces and cap anti-rotation means for resisting rotational forces, said valve stem being molded about said valve cap insert and receiving said cap anti-tension means and said cap anti-rotation means whereby said valve cap and valve stem are permanently fixed relative to each other; said cap anti-tension means comprises a plurality of annular ribs in said valve cap insert; and said cap anti-rotation means comprises a plurality of circumferentially equally spaced slots and complementary flanges in said annular ribs of said valve cap insert.
Claim 22
Dependent Claim
25 words
The composite engine valve of claim 16 wherein said slots and flanges in said annular ribs of said valve cap insert have approximately equal widths.
Claim 23
Dependent Claim
21 words
The composite engine valve of claim 18 wherein said valve cap and said valve cap stem are a titanium alloy material.
References Cited (Backward Citations)
US2043307A
Cited
US2664874A
Cited
US3073294A
Cited
US3061482A
Cited
US3328145A
Cited
US3438118A
Cited
US3711171A
Cited
US4050956A
Cited
US4149910A
Cited
US4155492A
Cited
US4301213A
Cited
US4359022A
Cited
US4410285A
Cited
US4556022A
Cited
US4597367A
Cited
US4433652A
Cited
US4846837A
Cited
US4770549A
Cited
US4883778A
Cited
US4872431A
Cited
US4834036A
Cited
US4881500A
Cited
US4928645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-10 | 1995-09-09 | 1996-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-10 | 1999-09-09 | 2000-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-10 | 2003-09-09 | 2004-03-10 | $7700.00 | Window Closed / Lapsed |