US3880128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve actuation mechanism including valve lash adjustment means
Assignee: Ford Motor Co
•
Filing: 1973-05-02
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Granted: 1975-04-29
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Expires: 1993-05-02
Abstract
Abstract A lash adjustor for the valve actuating mechanism of an internal combustion engine having an overhead camshaft comprising an adjustable rocker arm fulcrum. A fulcrum stud is slidingly received within a bore formed in the cylinder head. A spring biases the stud to a position of maximum protrusion to permit automatic positioning of the stud for lash adjustment. A clamp may be tightened about the stud to fix its position relative to the cylinder head.
Inventors
- 👤 George F Stirrat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:09
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/185; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L2001/187; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/206
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
78 words
In an internal combustion engine having a cylinder head, a bore formed in the cylinder head, a rocker arm fulcrum stud slidingly received within said bore and having one end protruding therefrom, spring means engagable with said stud urging the protrusion of said stud from said bore, clamp means threadedly engagable with said cylinder head and frictionally engagable with said stud, said clamp means being movable to release and to secure said stud relative to said cylinder head.
Claim 2
Dependent Claim
78 words
In an internal combustion engine having a cylinder head, a bore formed in the cylinder head, a rocker arm fulcrum stud slidingly received within said bore and having one end protruding therefrom, spring means engagable with said stud urging the protrusion of said stud from said bore, clamp means threadedly engagable with said cylinder head and frictionally engagable with said stud, said clamp means being movable to release and to secure said stud relative to said cylinder head.
Claim 3
Dependent Claim
36 words
In an internal combustion engine according to claim 1, said spring means comprising a compression spring received within said bore, said spring acting between the base of said bore and the received end of said stud.
Claim 4
Dependent Claim
102 words
In an internal combustion engine according to claim 1, said clamp means comprising an insert member positioned about said stud, said insert member having a threaded portion coaxial with said bore threadedly received within said cylinder head, said insert member including an inwardly directEd conical surface, split collar means having outwardly directed conical surfaces corresponding to and engagable with said insert member conical surface, said split collar means having inwardly directed cylindrical surfaces corresponding to and cooperating with said stud, abutment means formed in said cylinder head about said bore limiting the axial displacement in one direction of said split collar means.
Claim 5
Dependent Claim
129 words
In an internal combustion engine, a cylinder head, a valve having a valve stem reciprocally mounted within said cylinder head, a fulcrum stud mounted within said cylinder head, a camshaft rotatably mounted to said cylinder head, a rocker arm having one end pivotably mounted on said stud, the other end positioned at the end of said valve stem and an intermediate portion slidingly engagable with said camshaft, a bore formed in said cylinder head, said stud being slidingly received within said bore, spring means engagable with stud urging the protrusion of said stud from said bore, clamp means threadedly engagable with said cylinder head and frictionally engagable with said stud, said clamp means being movable to release said stud or to secure said stud relative to said cylinder head.
Claim 6
Dependent Claim
129 words
In an internal combustion engine, a cylinder head, a valve having a valve stem reciprocally mounted within said cylinder head, a fulcrum stud mounted within said cylinder head, a camshaft rotatably mounted to said cylinder head, a rocker arm having one end pivotably mounted on said stud, the other end positioned at the end of said valve stem and an intermediate portion slidingly engagable with said camshaft, a bore formed in said cylinder head, said stud being slidingly received within said bore, spring means engagable with stud urging the protrusion of said stud from said bore, clamp means threadedly engagable with said cylinder head and frictionally engagable with said stud, said clamp means being movable to release said stud or to secure said stud relative to said cylinder head.
Claim 7
Dependent Claim
36 words
In an internal combustion engine according to claim 4, said spring means comprising a compression spring received within said bore, said spring acting between the base of said bore and the received end of said stud.
Claim 8
Dependent Claim
102 words
In an internal combustion engine according to claim 4, said clamp means comprising an insert member positioned about said stud, said insert member having a threaded portion coaxial with said bore threadedly received within said cylinder head, said insert member including an inwardly directed conical surface, split collar means having outwardly directed conical surfaces corresponding to and engagable with said insert member conical surface, said split collar means having inwardly directed cylindrical surfaces corresponding to and cooperating with said stud. abutment means formed in said cylinder head about said bore limiting the axial displacement in one direction of said split collar means.
Claim 9
Dependent Claim
36 words
In an internal combustion engine according to claim 6, said spring means comprising a compression spring received within said bore, said spring acting between the base of said bore and the received end of said stud.
Claim 10
Dependent Claim
155 words
In an internal combustion engine according to claim 4, said bore opening into a threaded bore formed in said cylinder head, said threaded bore being concentric with said first mentioned bore and having a relatively larger diameter, said clamp means comprising an insert member positioned about said stud and having a portion threadedly received within said threaded bore, said insert member including an inwardly directed conical surface, split collar means positioned within said insert member and about said stud, said split collar means having outwardly directed conical surfaces corresponding to and engagable with said insert member conical surface and having inwardly directed cylindrical surfaces corresponding to and cooperating with said stud, said insert member being rotatable in one direction to tighten said split collar means about said stud and in the other direction to release said split collar means from about said stud and to permit said stud to slide within said first mentioned bore.
Claim 11
Dependent Claim
36 words
In an internal combustion engine according to claim 8, said spring means comprising a compression spring received within said bore, said spring acting between the base of said bore and the received end of said stud.
Claim 12
Dependent Claim
97 words
In an internal combustion engine according to claim 4, said clamp means comprising an insert member positioned about said stud, said insert member having a threaded portion conical with said bore and threadedly received within said cylinder head, said insert member including a pair of inwardly directed conical surfaces separated by an inwardly directed cylindrical surface, split color means having a pair of outwardly directed conical surfaces corresponding respectively to and engagable with said insert member conical surfaces, said split collar means having inwardly directed cylindrical surfaces corresponding to and cooperating with contiguous surfaces of said stud.
Claim 13
Dependent Claim
32 words
The combination of claim 10, said spring means comprising a compression spring received within said bore, said spring acting between the base of said bore and the received end of said stud.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |