US3885546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stem seal and lubricator
Assignee: Ford Motor Co
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Filing: 1973-11-05
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Granted: 1975-05-27
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Expires: 1993-11-05
Abstract
Abstract A valve stem oil seal and lubricator for an internal combustion engine intake or exhaust valve including a porous annular member having an elastomeric segment. The annular member is fixed in position relative to the valve guide bore. The elastomeric segment is bonded to the porous material and is in tension when the annular member is installed about the valve stem.
Inventors
- 👤 Thomas J Foley
- 👤 Arthur E Witzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:27
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/08
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
82 words
A combination seal and lubricator means, a fixed member and a cylindrical member reciprocable relative to and protruding from the fixed member, said seal and lubricator means comprising an annular member secured to the fixed member and positioned about the cylindrical member, said annular member engaging the circumference of said cylindrical member, said annular member comprising porous material and elastomeric material, said elastomeric material interposing portions of said porous material, said elastomeric material being under tension when installed about the cylindrical member.
Claim 2
Dependent Claim
82 words
A combination seal and lubricator means, a fixed member and a cylindrical member reciprocable relative to and protruding from the fixed member, said seal and lubricator means comprising an annular member secured to the fixed member and positioned about the cylindrical member, said annular member engaging the circumference of said cylindrical member, said annular member comprising porous material and elastomeric material, said elastomeric material interposing portions of said porous material, said elastomeric material being under tension when installed about the cylindrical member.
Claim 3
Dependent Claim
84 words
In an internal combustion engine valve stem seal and lubricator, a valve guide and a valve stem axially reciprocable relative to the valve guide, said seal and lubricator comprising an annular member fixed relative to the valve guide and positioned about the valve stem, said annular member engaging the circumference of said cylindrical member, said annular member comprising porous material and elastomeric material, said elastomeric material interposing portions of said porous material, said elastomeric material being under tension when installed about the valve stem.
Claim 4
Dependent Claim
84 words
In an internal combustion engine valve stem seal and lubricator, a valve guide and a valve stem axially reciprocable relative to the valve guide, said seal and lubricator comprising an annular member fixed relative to the valve guide and positioned about the valve stem, said annular member engaging the circumference of said cylindrical member, said annular member comprising porous material and elastomeric material, said elastomeric material interposing portions of said porous material, said elastomeric material being under tension when installed about the valve stem.
Claim 5
Dependent Claim
19 words
The combination of claim 2, said annular member being primarily porous material and including a sector of elastomeric material.
Claim 6
Dependent Claim
31 words
The combination of claim 2, the interior diameter of said annular member being less than the diameter of said valve stem when said annular member is in an uninstalled free state.
Claim 7
Dependent Claim
11 words
The combination of claim 2, said porous material comprising sintered metal.
Claim 8
Dependent Claim
58 words
The combination of claim 2, said valve guide comprising a boss positioned about a portion of said valve stem, a cylindrical bore formed in said boss about said valve stem, an elastomeric seal received in said recess and engaging the base of said bore, said seal being positioned between said annular member and the base of said bore.
Claim 9
Dependent Claim
14 words
The combination of claim 6, fastening means retaining said annular member within said bore.
Claim 10
Dependent Claim
26 words
The combination of claim 6, said annular member comprising primarily porous material and including a segment of elastomeric material, said segment and said seal being integral.
Claim 11
Dependent Claim
54 words
The combination of claim 2, said valve guide comprising a boss positioned about a portion of said valve stem, a cylindrical bore formed in said boss about said valve stem, an elastomeric cup received within said bore engaging the side wall and base of said bore, said annular member being received within said cup.
Claim 12
Dependent Claim
14 words
The combination of claim 9, fastening means retaining said annular member within said bore.
Claim 13
Dependent Claim
27 words
The combination of claim 9, said annular member comprising primarily porous material and including a segment of elastomeric material, said segment and said cup being integrally Formed.
Claim 14
Dependent Claim
39 words
The combination of claim 9, an opening formed in the base of said cup receiving said valve stem, said opening spaced from said valve stem to not prevent regulated oil flow through said porous material along said valve stem.
Claim 15
Dependent Claim
52 words
The combination of claim 2, said internal combustion engine including a spring positioned around said valve stem, an elastomeric flange disposed about and secured to said annular member, the base of said spring engaging said flange to essentially fix the position of said flange and annular member relative to said valve guide.
Claim 16
Dependent Claim
27 words
The combination of claim 13, said annular member comprising primarily porous material and including a segment of elastomeric material, said segment and said flange being integrally formed.
Claim 17
Dependent Claim
38 words
The combination of claim 14, said flange secured to said annular member so that the base of said annular member is spaced the surface about said valve guide, said flange sealingly engaging the surface about said valve guide.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |