US4788955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spark advance throttle control
Assignee: Outboard Marine Corp
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Filing: 1987-09-16
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Granted: 1988-12-06
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Expires: 2007-09-16
Abstract
Abstract Disclosed herein is a throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, the throttle control assembly comprising a mechanism coupled to the throttle valve and including a member coupled to the cam for opening the throttle valve in response to movement of the member in a first direction and for closing the throttle valve in response to movement of the member in a second direction, and a relative movement mechanism for preventing continued opening of the throttle valve beyond a predetermined position despite continued movement of the member in the first direction.
Inventors
- 👤 Le Roy T. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:57
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20006; Y10T74/21; Y10T74/2142; Y10T74/2144; Y10T74/2146
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
272 words
An engine apparatus comprising an internal combustion engine, a cam movable in response to desired engine speed changes, a throttle valve movable between a closed position and an open position for regulating the flow of combustion air to said engine, and a throttle control assembly responsive to movement of said cam for controlling the position of said throttle valve in accordance with said desired engine speed changes, said throttle control assembly comprising a cam follower for engaging the cam, a cam follower slide supporting said cam follower, a cam follower slide ramp having means on said slide ramp for supporting said cam follower slide in position for engagement of said cam follower with said cam and for movement of said cam follower slide along a predetermined path in response to movement of said cam follower incident to movement of said cam, a linkage assembly coupling said cam follower slide with said throttle valve so as to vary the position of said throttle valve in accordance with the position of said cam follower slide along said predetermined path, a throttle stop for preventing movement of said cam follower slide in one direction along said predetermined path beyond a position corresponding to said open position of said throttle valve, and means for providing relative movement between said cam follower and said cam follower slide when said cam follower slide is in said position and said cam causes continued movement in said one direction of said cam follower, whereby movement of said throttle valve beyond said open position is prevented despite continued movement of said cam in accordance with further desired change in engine speed.
Claim 2
Dependent Claim
272 words
An engine apparatus comprising an internal combustion engine, a cam movable in response to desired engine speed changes, a throttle valve movable between a closed position and an open position for regulating the flow of combustion air to said engine, and a throttle control assembly responsive to movement of said cam for controlling the position of said throttle valve in accordance with said desired engine speed changes, said throttle control assembly comprising a cam follower for engaging the cam, a cam follower slide supporting said cam follower, a cam follower slide ramp having means on said slide ramp for supporting said cam follower slide in position for engagement of said cam follower with said cam and for movement of said cam follower slide along a predetermined path in response to movement of said cam follower incident to movement of said cam, a linkage assembly coupling said cam follower slide with said throttle valve so as to vary the position of said throttle valve in accordance with the position of said cam follower slide along said predetermined path, a throttle stop for preventing movement of said cam follower slide in one direction along said predetermined path beyond a position corresponding to said open position of said throttle valve, and means for providing relative movement between said cam follower and said cam follower slide when said cam follower slide is in said position and said cam causes continued movement in said one direction of said cam follower, whereby movement of said throttle valve beyond said open position is prevented despite continued movement of said cam in accordance with further desired change in engine speed.
Claim 3
Dependent Claim
36 words
An engine apparatus in accordance with claim 1 wherein said relative movement means includes means for adjustably limiting movement of said cam follower relative to said cam follower slide in the direction opposite said one direction.
Claim 4
Dependent Claim
37 words
An engine apparatus in accordance with claim 1 wherein said cam follower is slidably mounted on said cam follower slide and wherein said relative movement means includes a first spring biasing said cam follower toward said cam.
Claim 5
Dependent Claim
32 words
An engine apparatus in accordance with claim 3 further comprising a second spring for biasing said throttle toward said closed position such that said cam follower is continuously biased against said cam.
Claim 6
Dependent Claim
82 words
An engine apparatus in accordance with claim 4 wherein said first spring provides a first bias force and said second spring provides a second bias force which is less than said first bias force such that movement of said cam so as to open said throttle compresses said second spring while said first spring remains substantially uncompressed until such time as said throttle stop prevents further movement of said cam follower slide and said cam causes continued movement of said cam follower.
Claim 7
Dependent Claim
108 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, said throttle control assembly comprising means coupled to the throttle valve and including a member adapted for coupling to said cam for opening the throttle valve in response to movement of said member in a first direction and for closing the throttle valve in response to movement of said member in a second direction, and lost movement means for preventing continued opening of the throttle valve beyond a predetermined position despite continued movement of said member in said first direction.
Claim 8
Dependent Claim
108 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, said throttle control assembly comprising means coupled to the throttle valve and including a member adapted for coupling to said cam for opening the throttle valve in response to movement of said member in a first direction and for closing the throttle valve in response to movement of said member in a second direction, and lost movement means for preventing continued opening of the throttle valve beyond a predetermined position despite continued movement of said member in said first direction.
Claim 9
Dependent Claim
35 words
A throttle control assembly in accordance with claim 6 wherein said member includes a cam follower for engaging the cam and a cam follower slide for supporting the cam follower in engagement with the cam.
Claim 10
Dependent Claim
26 words
A throttle control assembly in accordance with claim 7 wherein said lost movement means permits relative movement between said cam follower and said cam follower slide.
Claim 11
Dependent Claim
29 words
A throttle control assembly in accordance with claim 8 wherein said lost movement means includes a first spring for biasing said cam follower relative to said cam follower slide.
Claim 12
Dependent Claim
63 words
A throttle control assembly in accordance with claim 9, wherein an additional spring is provided for biasing the throttle valve in a direction tending to close the throttle valve and wherein said additional spring is more easily compressed than said first spring such that said additional spring compresses before said first spring in response to movement of said member in said first direction.
Claim 13
Dependent Claim
120 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, said throttle control assembly comprising means adapted for coupling to the throttle valve and including apparatus having first and second members and being adapted for coupling to said cam for opening the throttle valve in response to movement of said apparatus in a first direction and for closing the throttle valve in response to movement of said apparatus in a second direction, and relative movement means for preventing continued movement of said apparatus in said first direction beyond a predetermined position despite continued movement of said first member in said first direction.
Claim 14
Dependent Claim
120 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, said throttle control assembly comprising means adapted for coupling to the throttle valve and including apparatus having first and second members and being adapted for coupling to said cam for opening the throttle valve in response to movement of said apparatus in a first direction and for closing the throttle valve in response to movement of said apparatus in a second direction, and relative movement means for preventing continued movement of said apparatus in said first direction beyond a predetermined position despite continued movement of said first member in said first direction.
Claim 15
Dependent Claim
40 words
A throttle control assembly in accordance with claim 11 wherein said first member comprises a cam follower for engaging the cam and said second member comprises a cam follower slide for supporting the cam follower in engagement with the cam.
Claim 16
Dependent Claim
26 words
A throttle control assembly in accordance with claim 12 wherein said relative movement means permits relative movement between said cam follower and said cam follower slide.
Claim 17
Dependent Claim
27 words
A throttle control assembly in accordance with claim 13 wherein said relative movement means includes a spring biasing said cam follower relative to said cam follower slide.
Claim 18
Dependent Claim
64 words
A throttle control assembly in accordance with claim 14 wherein an additional spring is provided biasing the throttle valve in a direction tending to close the throttle valve and wherein said additional spring is more easily compressed than said first spring such that said additional spring compresses before said first spring in response to movement of said cam follower slide in said first direction.
Claim 19
Dependent Claim
189 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type having a mechanism for advancing and retarding ignition timing in accordance with desired engine speed changes and including a cam movable in accordance with the desired engine speed changes, said throttle control comprising means including a cam follower slide and a cam follower carried by said cam follower slide for translating movement of the cam into movement of said cam follower slide, linkage means coupling said cam follower slide and adapted to be coupled with the throttle valve to vary the position of the throttle valve in accordance with position of said cam follower slide, stop means for preventing movement of said cam follower slide beyond a predetermined stop position, and relative movement means for permitting relative movement between said cam follower and said cam follower slide when said cam follower slide is displaced to said stop position by said stop means and the cam urges further displacement of said cam follower such that movement of the linkage means beyond a desired limit position is prevented despite continued movement of the cam.
Claim 20
Dependent Claim
189 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type having a mechanism for advancing and retarding ignition timing in accordance with desired engine speed changes and including a cam movable in accordance with the desired engine speed changes, said throttle control comprising means including a cam follower slide and a cam follower carried by said cam follower slide for translating movement of the cam into movement of said cam follower slide, linkage means coupling said cam follower slide and adapted to be coupled with the throttle valve to vary the position of the throttle valve in accordance with position of said cam follower slide, stop means for preventing movement of said cam follower slide beyond a predetermined stop position, and relative movement means for permitting relative movement between said cam follower and said cam follower slide when said cam follower slide is displaced to said stop position by said stop means and the cam urges further displacement of said cam follower such that movement of the linkage means beyond a desired limit position is prevented despite continued movement of the cam.
Claim 21
Dependent Claim
34 words
A throttle control assembly in accordance with claim 16 wherein said throttle stop means is adjustable so as to vary said stop position and thereby vary the desired limit position of said linkage means.
Claim 22
Dependent Claim
70 words
A throttle control assembly in accordance with claim 17 wherein said cam follower is biased into a fixed position relative to said cam follower slide when said cam follower slide is other than in said stop position and wherein adjusting means is provided for adjusting said fixed position of said cam follower relative to said cam follower slide when said cam follower slide is other than in said stop position.
Claim 23
Dependent Claim
27 words
A throttle control assembly in accordance with claim 18 wherein said desired limit position of said linkage means corresponds to the wide-open position of said throttle valve.
Claim 24
Dependent Claim
145 words
An engine apparatus comprising an internal combustion engine, a cam movable in response to desired engine speed changes, a throttle valve movable between a closed position and an open position for regulating the flow of combustion air to said engine, and a throttle control assembly responsive to movement of said cam for controlling the position of said throttle valve in accordance with desired engine speed changes, said throttle control assembly comprising a cam follower for engaging the cam, a support having means thereon for supporting said cam follower in position for engagement with said cam and for movement of said cam follower along a predetermined linear path in response to movement of said cam, and a linkage assembly coupling said cam follower with said throttle valve so as to vary the position of said throttle valve in accordance with the position of said cam follower.
Claim 25
Dependent Claim
145 words
An engine apparatus comprising an internal combustion engine, a cam movable in response to desired engine speed changes, a throttle valve movable between a closed position and an open position for regulating the flow of combustion air to said engine, and a throttle control assembly responsive to movement of said cam for controlling the position of said throttle valve in accordance with desired engine speed changes, said throttle control assembly comprising a cam follower for engaging the cam, a support having means thereon for supporting said cam follower in position for engagement with said cam and for movement of said cam follower along a predetermined linear path in response to movement of said cam, and a linkage assembly coupling said cam follower with said throttle valve so as to vary the position of said throttle valve in accordance with the position of said cam follower.
Claim 26
Dependent Claim
110 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, said control assembly comprising a cam follower for engaging the cam, a support having means thereon for supporting said cam follower in position for engagement of said cam follower with said cam and for movement of said cam follower along a predetermined linear path in response to movement of said cam, and a linkage assembly coupling said cam follower with said throttle valve so as to vary the position of said throttle valve in accordance with the position of said cam follower.
Claim 27
Dependent Claim
110 words
A throttle control assembly for positioning the throttle valve of an internal combustion engine of the type including a cam movable in accordance with desired engine speed changes, said control assembly comprising a cam follower for engaging the cam, a support having means thereon for supporting said cam follower in position for engagement of said cam follower with said cam and for movement of said cam follower along a predetermined linear path in response to movement of said cam, and a linkage assembly coupling said cam follower with said throttle valve so as to vary the position of said throttle valve in accordance with the position of said cam follower.
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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) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |