Patent US3869937A successfully refreshed from Google Patents.
US3869937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocked hand-and foot-operable engine speed control
Assignee: Deere and Co
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Filing: 1974-03-07
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Granted: 1975-03-11
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Expires: 1994-03-07
Abstract
Abstract A manually operable control is provided for effecting acceleration and deceleration of an engine by selective actuation of an engine fuel control device. The control includes an output section comprising first, second and third arms mounted for pivoting about a common axis. A hand throttle linkage is connected directly to the first arm for swinging the latter among selected angular positions and for fixing the first arm in said positions. A foot throttle linkage is connected directly to the second arm, which in turn is connected to the fuel control device. The first and second arms are located on opposite sides of the third arm and have respective abutment portions which extend axially towards the third arm and are disposed so as to respectively be in the paths of movement of a pair of oppositely extending abutment portions of the third arm. A double-coil spring is mounted on the three arms such that, as considered in a first direction of swinging movement of the three arms, a central spring portion located between the two coils engages the trailing side of the third arm while the opposite ends of the spring are respectively engaged with the leading sides of the first and second arms, the respective leading surfaces of the abutment portions of the first and second arms thus being biased into engagement with the respective trailing sides of the oppositely extending abutment portions of the third arm. A desired fuel control device setting can be selected by shifting the hand throttle linkage to and fixing it in a desired position, the torsion spring acting together with the abutment surfaces to transmit the motion of the first arm to the second arm by way of the third arm, the motion of the third arm being transmitted to the fuel control device. The foot throttle linkage floats or moves freely with the third arm when the latter is actuated by the hand throttle linkage. The foot throttle linkage is used to override the fuel control device setting preselected by the hand throttle linkage. For this purpose, the foot throttle linkage includes a two-piece foot pedal having respective toe and heel operable sections pivoted about a common axis for selective operation for respectively initiating acceleration and deceleration of the engine. The toe operable section of the foot pedal can be lifted upwardly by hand to shut off the flow of fuel to the engine. When the foot pedal is released, the torsion spring acts to return the fuel control device to its preselected setting.
Inventors
- 👤 Barry Louis Ahrens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
B; B60; B60K; B60K26/00; B60K26/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213; Y10T74/2022; Y10T74/20226; Y10T74/20528; Y10T74/20534
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
269 words
An output linkage for transferring a first input to a controlled device for selecting a desired operating condition of the device, for transferring a second input to the controlled device for overriding the condition set by the first input and for automatically returning the device to said desired operating condition once a force initiating and second input is removed, comprising: first, second and third arms mounted for swinging movement about a first axis, the arms being grouped together with the third arm being located between the first and second arms; first input means connected to said first arm for selectively swinging the latter about said axis to and for fixing the latter in selected positions; second input means connected to said second arm and link means connecting the second arm to said controlled device; said second input means connected for floating movement with said second arm when the latter is swung to adjust the controlled device in response to the first arm being swung to a selected position by said input means and for selectively swinging said second arm independently of said first arm to adjust the device so as to override the setting thereof determined by said first input means; said first and second arms having respective stop portions disposed for abutting said third arm; spring means resiliently interconnecting said first, second and third arms and biasing said first and second arms in a first direction about said axis and biasing said third arm in an opposite second direction about said axis to thereby yieldably hold said first and second arms in abutting engagement with said third arm.
Claim 2
Dependent Claim
269 words
An output linkage for transferring a first input to a controlled device for selecting a desired operating condition of the device, for transferring a second input to the controlled device for overriding the condition set by the first input and for automatically returning the device to said desired operating condition once a force initiating and second input is removed, comprising: first, second and third arms mounted for swinging movement about a first axis, the arms being grouped together with the third arm being located between the first and second arms; first input means connected to said first arm for selectively swinging the latter about said axis to and for fixing the latter in selected positions; second input means connected to said second arm and link means connecting the second arm to said controlled device; said second input means connected for floating movement with said second arm when the latter is swung to adjust the controlled device in response to the first arm being swung to a selected position by said input means and for selectively swinging said second arm independently of said first arm to adjust the device so as to override the setting thereof determined by said first input means; said first and second arms having respective stop portions disposed for abutting said third arm; spring means resiliently interconnecting said first, second and third arms and biasing said first and second arms in a first direction about said axis and biasing said third arm in an opposite second direction about said axis to thereby yieldably hold said first and second arms in abutting engagement with said third arm.
Claim 3
Dependent Claim
269 words
An output linkage for transferring a first input to a controlled device for selecting a desired operating condition of the device, for transferring a second input to the controlled device for overriding the condition set by the first input and for automatically returning the device to said desired operating condition once a force initiating and second input is removed, comprising: first, second and third arms mounted for swinging movement about a first axis, the arms being grouped together with the third arm being located between the first and second arms; first input means connected to said first arm for selectively swinging the latter about said axis to and for fixing the latter in selected positions; second input means connected to said second arm and link means connecting the second arm to said controlled device; said second input means connected for floating movement with said second arm when the latter is swung to adjust the controlled device in response to the first arm being swung to a selected position by said input means and for selectively swinging said second arm independently of said first arm to adjust the device so as to override the setting thereof determined by said first input means; said first and second arms having respective stop portions disposed for abutting said third arm; spring means resiliently interconnecting said first, second and third arms and biasing said first and second arms in a first direction about said axis and biasing said third arm in an opposite second direction about said axis to thereby yieldably hold said first and second arms in abutting engagement with said third arm.
Claim 4
Dependent Claim
269 words
An output linkage for transferring a first input to a controlled device for selecting a desired operating condition of the device, for transferring a second input to the controlled device for overriding the condition set by the first input and for automatically returning the device to said desired operating condition once a force initiating and second input is removed, comprising: first, second and third arms mounted for swinging movement about a first axis, the arms being grouped together with the third arm being located between the first and second arms; first input means connected to said first arm for selectively swinging the latter about said axis to and for fixing the latter in selected positions; second input means connected to said second arm and link means connecting the second arm to said controlled device; said second input means connected for floating movement with said second arm when the latter is swung to adjust the controlled device in response to the first arm being swung to a selected position by said input means and for selectively swinging said second arm independently of said first arm to adjust the device so as to override the setting thereof determined by said first input means; said first and second arms having respective stop portions disposed for abutting said third arm; spring means resiliently interconnecting said first, second and third arms and biasing said first and second arms in a first direction about said axis and biasing said third arm in an opposite second direction about said axis to thereby yieldably hold said first and second arms in abutting engagement with said third arm.
Claim 5
Dependent Claim
76 words
The control linkage defined in claim 1 wherein said resilient means comprises a double-wound, helically-coiled torsion spring having first and second coil sections interconnected by an intermediate section engaged with a leading side portion of the third arm, relative to the latter moving in said second direction, said coil sections terminating in respective end portions respectively engaged with trailing side portions of said first and second arms relative to the latter moving in said second direction.
Claim 6
Dependent Claim
78 words
The control linkage defined in claim 2 wherein first, second and third arms each include cylindrical inner end portions arranged concentrically with said axis; and said first coil section of said spring being received partly on each of the cylindrical inner end portions of each of said first and third arms and said second coil section of said spring being received partly on each of the cylindrical inner end portions of each of said second and third arms.
Claim 7
Dependent Claim
237 words
A manually operable control for effecting acceleration and deceleration of an engine by selective actuation of an engine fuel control device, comprising: first, second and third arms pivotally mounted for swinging in opposite first and second directions in respective paths about a fixed axis; said third arm being positioned between the first and second arms and having oppositely located first and second portions respectively locateD in the respective paths of movement of said first and second arms; a releasably fixable first control linkage means connected to said first arm and operable for selectively moving said first arm to and and fixing said first arm in a selected position; a floating second control linkage means connected to said second arm and to said fuel control device and selectively operable for moving said second arm about said axis; and resilient means yieldably holding said third arm in engagement with said first and second arms and interconnecting all three of said arms for movement together in response to actuation of said lockable control linkage means whereby said second and third arms are moved to respective first positions when the first arm is moved to a selected position and said second arm is thereafter selectively movable in said first and second directions from its selected position by said floatable linkage means, said resilient means acting to restore said second arm to its selected position once the floatable linkage means is released.
Claim 8
Dependent Claim
237 words
A manually operable control for effecting acceleration and deceleration of an engine by selective actuation of an engine fuel control device, comprising: first, second and third arms pivotally mounted for swinging in opposite first and second directions in respective paths about a fixed axis; said third arm being positioned between the first and second arms and having oppositely located first and second portions respectively locateD in the respective paths of movement of said first and second arms; a releasably fixable first control linkage means connected to said first arm and operable for selectively moving said first arm to and and fixing said first arm in a selected position; a floating second control linkage means connected to said second arm and to said fuel control device and selectively operable for moving said second arm about said axis; and resilient means yieldably holding said third arm in engagement with said first and second arms and interconnecting all three of said arms for movement together in response to actuation of said lockable control linkage means whereby said second and third arms are moved to respective first positions when the first arm is moved to a selected position and said second arm is thereafter selectively movable in said first and second directions from its selected position by said floatable linkage means, said resilient means acting to restore said second arm to its selected position once the floatable linkage means is released.
References Cited (Backward Citations)
US3237478A
Cited
US3508454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |