US3626469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve gear
Assignee: Individual
•
Filing: 1968-11-12
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Granted: 1971-12-07
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Expires: 1988-11-12
Abstract
Abstract A positively operated valve gear for an internal combustion engine embodying pivotally supported rocker arms that carry detachable spring fingers which fingers engage cams on a camshaft for pivoting the rocker arms upon rotation of the camshaft. The rocker arm is pivotally connected to the engine poppet valves for positively transmitting movement to these valves and may be formed as a casting, forging or stamping. The pivotal connection between the rocker arms and poppet valves is accomplished through an improved keeper arrangement. The rocker arm acts as a thirdclass lever so that the valves can be disposed on opposite sides of the axis of the rotation of the camshaft giving greater latitude to the positioning of the valves relative to the cylinder bore.
Inventors
- 👤 Gerald J Ashley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:20
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/30; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
255 words
A positive valve gear for an internal combustion engine or the like comprising a valve, a rocker arm, a pivot member pivotally supporting said rocker arm, said pivot member having a shank portion adapted to be affixed to an associated component of the engine or the like and a pair of spaced, oppositely extending bearing portions, said bearing portions extending substantially perpendicular to said shank portion, said rocker-arm-defining bearing surfaces in engagement with said pivot member bearing portions for supporting said rocker arm upon said pivot member for pivotal movement between a valve-opening position and a valve-closing position, said bearing surfaces of said rocker arm extending through substantially less than 360* and engaging said portions on one side thereof, means for positively connecting said rocker arm to said valve for movement of said valve simultaneously with movement of said rocker arm between both of said rocker arm positions, and operating means for moving said rocker arm between said positions thereby positively moving said valve between its opened position and its closed position, said operating means comprising rotary cam means and cooperating follower means carried by said rocker arm and engaged with said cam means for pivoting said rocker arm upon rotation of said cam means, at least one of the follower means being spring biased into engagement with the cam means for eliminating lash, said follower means being fixed to said rocker arm and engaging said pivot member bearing portions on the side thereof opposite to the side engaged by said rocker arm bearing surfaces.
Claim 2
Dependent Claim
255 words
A positive valve gear for an internal combustion engine or the like comprising a valve, a rocker arm, a pivot member pivotally supporting said rocker arm, said pivot member having a shank portion adapted to be affixed to an associated component of the engine or the like and a pair of spaced, oppositely extending bearing portions, said bearing portions extending substantially perpendicular to said shank portion, said rocker-arm-defining bearing surfaces in engagement with said pivot member bearing portions for supporting said rocker arm upon said pivot member for pivotal movement between a valve-opening position and a valve-closing position, said bearing surfaces of said rocker arm extending through substantially less than 360* and engaging said portions on one side thereof, means for positively connecting said rocker arm to said valve for movement of said valve simultaneously with movement of said rocker arm between both of said rocker arm positions, and operating means for moving said rocker arm between said positions thereby positively moving said valve between its opened position and its closed position, said operating means comprising rotary cam means and cooperating follower means carried by said rocker arm and engaged with said cam means for pivoting said rocker arm upon rotation of said cam means, at least one of the follower means being spring biased into engagement with the cam means for eliminating lash, said follower means being fixed to said rocker arm and engaging said pivot member bearing portions on the side thereof opposite to the side engaged by said rocker arm bearing surfaces.
Claim 3
Dependent Claim
25 words
A positive valve gear as set forth in claim 1 wherein both of the follower means are spring biased into engagement with the cam means.
Claim 4
Dependent Claim
23 words
A positive valve gear as set forth in claim 1 wherein the spring bias is accomplished by employing a resilient spring arm follower.
Claim 5
Dependent Claim
22 words
A positive valve gear as set forth in claim 3 wherein the spring bias is accomplished by using two spring arm followers.
Claim 6
Dependent Claim
25 words
A positive valve gear as set forth in claim 4 wherein at least one of the spring followers is detachably connected to the rocker arm.
Claim 7
Dependent Claim
24 words
A positive valve gear as set forth in claim 5 wherein both of the spring arm followers are detachably connected to the rocker arm.
Claim 8
Dependent Claim
35 words
A positive valve gear as set forth in claim 1 wherein the means for positively connecting the rocker arm to the valve comprises means for pivotally and slidably connecting the rocker arm to the valve.
Claim 9
Dependent Claim
44 words
A positive valve gear as set forth in claim 1 wherein the rocker arm is formed as a stamping and is comprised of a web portion and integrally connected flange portions formed at the side of the web portion for reinforcing the rocker arm.
Claim 10
Dependent Claim
170 words
A valve gear for an internal combustion engine or the like comprising a rocker arm adapted to cooperate with a valve for operating said valve upon pivotal movement of said rocker arm, a pivot member pivotally supporting said rocker arm, said pivot member having a shank portion adapted to be affixed to an associated component of the engine or the like and a pair of spaced, oppositely extending bearing portions, said bearing portions extending substantially perpendicularly to said shank portion, said rocker-arm-defining bearing surfaces in engagement with said pivot member bearing portions for pivotally supporting said rockEr arm upon said pivot member, said bearing surfaces of the rocker arm extend through substantially less than 360* and engaging the pivot member bearing portions on one side thereof, and follower means adapted to engage a cam for pivoting said rocker arm, said follower means being fixed to said rocker arm and engaging said pivot member bearing portions on the side thereof opposite to the side engaged by said rocker arm bearing surfaces.
Claim 11
Dependent Claim
170 words
A valve gear for an internal combustion engine or the like comprising a rocker arm adapted to cooperate with a valve for operating said valve upon pivotal movement of said rocker arm, a pivot member pivotally supporting said rocker arm, said pivot member having a shank portion adapted to be affixed to an associated component of the engine or the like and a pair of spaced, oppositely extending bearing portions, said bearing portions extending substantially perpendicularly to said shank portion, said rocker-arm-defining bearing surfaces in engagement with said pivot member bearing portions for pivotally supporting said rockEr arm upon said pivot member, said bearing surfaces of the rocker arm extend through substantially less than 360* and engaging the pivot member bearing portions on one side thereof, and follower means adapted to engage a cam for pivoting said rocker arm, said follower means being fixed to said rocker arm and engaging said pivot member bearing portions on the side thereof opposite to the side engaged by said rocker arm bearing surfaces.
Claim 12
Dependent Claim
42 words
A valve gear as set forth in claim 9 further including lubricating passage means formed in said pivot member and extending from said shank portion to each of said bearing portions for lubricating said bearing portions and the rocker arm bearing surfaces.
Claim 13
Dependent Claim
34 words
A valve gear as set forth in claim 9 wherein the rocker arm is bifurcated for receiving a projection formed on the associated valve for pivotally connecting said rocker arm to the associated valve.
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |