US4940048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat-type rocker arm with flanges
Assignee: HENLEY MANUFACTURING HOLDING COMPANY Inc
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Filing: 1989-11-09
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Granted: 1990-07-10
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Expires: 2009-11-09
Abstract
Abstract A one-piece, cold-formed rocker arm is disclosed. The rocker arm is of the boat type and includes a one-piece metal body which is cold-formed from a metal blank and is of U-shaped cross-sectional configuration throughout most of its length. The body has a bottom wall with structurally-integral side walls extending upwardly therefrom in generally parallel relationship. An intermediate, concave portion of the bottom wall has an opening therethrough which receives a fulcrum of a pivot post. One end portion of the rocker arm body has a recess to receive an end of a push rod which imparts pivotal motion to the rocker arm about the fulcrum. The other end of the rocker arm body has a pad for engaging an end of a valve stem to impart motion to the valve stem when the rocker arm is pivoted about the fulcrum. Outwardly-extending stiffening flanges are formed at upper edge portions of intermediate portions of the side walls, which provides strength and stiffness to the side walls. The flanges substantially eliminate or at least substantially reduce buckling of the side walls during operation of the rocker arm and thereby eliminate or substantially reduce deflection between the two and portions of the rocker arm body.
Inventors
- 👤 Jesse V. Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:13
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/181; F01L1/182; F01L1/183
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
132 words
A cold-formed, boat-type rocker arm comprising an elongate, one-piece metal body of generally U-shaped configuration in transverse cross section throughout most of its length, said body having a bottom wall and side walls extending upwardly therefrom and structurally integral therewith, said body having means at a first end portion thereof for receiving a push rod, said body having additional means at a second end portion thereof for receiving an end of a valve stem, said bottom wall having an intermediate opening therein at an intermediate portion of said body to receive pivot means about which said rocker arm can pivot, upper edge portions of said side walls having outwardly-extending, continuous flanges to provide stiffness for said side walls and to resist buckling of said side walls during operation of said rocker arm.
Claim 2
Dependent Claim
132 words
A cold-formed, boat-type rocker arm comprising an elongate, one-piece metal body of generally U-shaped configuration in transverse cross section throughout most of its length, said body having a bottom wall and side walls extending upwardly therefrom and structurally integral therewith, said body having means at a first end portion thereof for receiving a push rod, said body having additional means at a second end portion thereof for receiving an end of a valve stem, said bottom wall having an intermediate opening therein at an intermediate portion of said body to receive pivot means about which said rocker arm can pivot, upper edge portions of said side walls having outwardly-extending, continuous flanges to provide stiffness for said side walls and to resist buckling of said side walls during operation of said rocker arm.
Claim 3
Dependent Claim
30 words
A rocker arm according to claim 1 wherein said flanges extend continuously for a distance from about one-third to about three-fourths of the overall length of said rocker arm body.
Claim 4
Dependent Claim
32 words
A rocker arm according to claim 1 wherein said flanges extend continuously for a distance from about forty percent to about sixty percent of the overall length of said rocker arm body.
Claim 5
Dependent Claim
32 words
A rocker arm according to claim 1 wherein said rocker arm body has a wide intermediate portion and narrower end portions with said flanges extending substantially the length of the intermediate portion.
Claim 6
Dependent Claim
25 words
A rocker arm according to claim 1 wherein said flanges form an included angle of from about thirty degrees to about one hundred forty degrees.
Claim 7
Dependent Claim
25 words
A rocker arm according to claim 1 wherein said flanges form an included angle of from about seventy degrees to about one hundred ten degrees.
Claim 8
Dependent Claim
29 words
A rocker arm according to claim 1 wherein said flanges have widths which are from about ten percent to about forty percent of the height of said side walls.
Claim 9
Dependent Claim
29 words
A rocker arm according to claim 1 wherein said flanges have widths which are from about fifteen percent to about twenty-five percent of the height of said side walls.
Claim 10
Dependent Claim
69 words
A rocker arm according to claim 1 wherein said flanges extend continuously for a distance of about one-third to about three-fourths of the overall length of said rocker arm body, said flanges form an included angle of from about thirty degrees to about one hundred forty degrees, and said flanges have widths which are from about ten percent to about forty percent of the height of said side walls.
Claim 11
Dependent Claim
51 words
A rocker arm according to claim 1 wherein said side walls of said body include generally parallel side walls and angular side walls extending inwardly toward both ends of said body, said flanges extending continuously over the length of the parallel side walls and tapering off at the angular side walls.
Claim 12
Dependent Claim
138 words
A cold-formed, boat-type rocker arm comprising an elongate, one-piece metal body of generally U-shaped configuration in transverse cross section throughout most of its length, said body having a bottom wall and side walls extending upwardly therefrom and structurally integral therewith, said body having a recess at a first end portion for receiving an end of a push rod, said body having a pad at a second end portion for engaging an end of a valve stem, said rocker arm having means at an intermediate portion thereof for receiving pivotal supporting means about which said rocker arm can be pivotally supported, upper edge portions of intermediate portions of said side walls having stiffening flanges extending upwardly and outwardly to provide stiffness for said side walls and to resist buckling of said side walls during operation of said rocker arm.
Claim 13
Dependent Claim
138 words
A cold-formed, boat-type rocker arm comprising an elongate, one-piece metal body of generally U-shaped configuration in transverse cross section throughout most of its length, said body having a bottom wall and side walls extending upwardly therefrom and structurally integral therewith, said body having a recess at a first end portion for receiving an end of a push rod, said body having a pad at a second end portion for engaging an end of a valve stem, said rocker arm having means at an intermediate portion thereof for receiving pivotal supporting means about which said rocker arm can be pivotally supported, upper edge portions of intermediate portions of said side walls having stiffening flanges extending upwardly and outwardly to provide stiffness for said side walls and to resist buckling of said side walls during operation of said rocker arm.
Claim 14
Dependent Claim
30 words
A rocker arm according to claim 11 wherein said flanges extend continuously for a distance from about one-third to about three-fourths of the overall length of said rocker arm body.
Claim 15
Dependent Claim
32 words
A rocker arm according to claim 11 wherein said flanges extend continuously for a distance from about forty percent to about sixty percent of the overall length of said rocker arm body.
Claim 16
Dependent Claim
32 words
A rocker arm according to claim 11 wherein said rocker arm body has a wide intermediate portion and narrower end portions with said flanges extending substantially the length of the intermediate portion.
Claim 17
Dependent Claim
25 words
A rocker arm according to claim 11 wherein said flanges form an included angle of from about thirty degrees to about one hundred forty degrees.
Claim 18
Dependent Claim
25 words
A rocker arm according to claim 11 wherein said flanges form an included angle of from about seventy degrees to about one hundred ten degrees.
Claim 19
Dependent Claim
29 words
A rocker arm according to claim 11 wherein said flanges have widths which are from about ten percent to about forty percent of the height of said side walls.
Claim 20
Dependent Claim
29 words
A rocker arm according to claim 11 wherein said flanges have widths which are from about fifteen percent to about twenty-five percent of the height of said side walls.
Claim 21
Dependent Claim
69 words
A rocker arm according to claim 11 wherein said flanges extend continuously for a distance of about one-third to about three-fourths of the overall length of said rocker arm body, said flanges form an included angle of from about thirty degrees to about one hundred forty degrees, and said flanges have widths which are from about ten percent to about forty percent of the height of said side walls.
Claim 22
Dependent Claim
51 words
A rocker arm according to claim 11 wherein said side walls of said body include generally parallel side walls and angular side walls extending inwardly toward both ends of said body, said flanges extending continuously over the length of the parallel side walls and tapering off at the angular side walls.
Claim 23
Dependent Claim
107 words
A rocker arm comprising an elongate, one-piece metal body having two generally parallel side walls and a connecting bottom wall therebetween, said body having angular side walls extending inwardly toward both ends of said body from said parallel side walls, upper edge portions of intermediate portions of said parallel side walls having stiffening flanges extending upwardly and outwardly to provide stiffness for said side walls, said stiffening flanges also extending over upper edge portions of said angular side walls, said rocker arm body having means for receiving a pivotal support, means for engaging a push rod, and additional means for engaging an end of a valve stem.
Claim 24
Dependent Claim
107 words
A rocker arm comprising an elongate, one-piece metal body having two generally parallel side walls and a connecting bottom wall therebetween, said body having angular side walls extending inwardly toward both ends of said body from said parallel side walls, upper edge portions of intermediate portions of said parallel side walls having stiffening flanges extending upwardly and outwardly to provide stiffness for said side walls, said stiffening flanges also extending over upper edge portions of said angular side walls, said rocker arm body having means for receiving a pivotal support, means for engaging a push rod, and additional means for engaging an end of a valve stem.
Claim 25
Dependent Claim
71 words
A rocker arm according to claim 21 wherein said stiffening flanges extend continuously for a distance from about forty percent to about sixty percent of the overall length of said rocker arm body, said flanges form an included angle from about seventy degrees to about one hundred ten degrees, and the width of said flanges is from about fifteen percent to about twenty-five percent of the height of said side walls.
References Cited (Backward Citations)
US2905160A
Cited
US2905161A
Cited
US3142357A
Cited
US3614943A
Cited
US3667434A
Cited
EP0118360A1
Cited
US4799464A
Cited
US4653441A
Cited
US4858575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |