US4414903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic guidance mechanism
Assignee: Pathfinder Systems Inc
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Filing: 1982-04-26
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Granted: 1983-11-15
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Expires: 2002-04-26
Abstract
Abstract An improvement in furrow followers of a type adapted for connection to an automatic steering mechanism for causing a vehicle to selectively follow a furrow is disclosed. The improvement provides a first and a second probe unit which are adapted to lie in a field furrow. The first probe unit is pivotally connected to a horizontal displacement arm. The second probe unit is pivotally connected to the first probe unit and is disposed in spaced trail position behind the first probe unit. A spacing bend is also provided in the second probe unit.
Inventors
- 👤 Mark E. Fasse
- 👤 Herbert C. Glesmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:06
CPC Classifications
A; A01; A01B; A01B69/00; A01B69/007; A01B69/008; B; B62; B62D; B62D1/00; B62D1/24; B62D1/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
334 words
An improvement for an apparatus for automatically guiding a frame while the frame is moving along the ground to follow a furrow in the ground comprising: a housing attached to said frame; displacement sensing means having an upper portion and a lower portion, said lower portion being disposed behind said upper portion and being adapted to be disposed in the furrow for sensing the lateral position of said housing with respect to the furrow; pivotal attachment means for pivotally attaching said upper portion of said displacement sensing means to said housing along a vertical axis whereby said displacement sensing means can pivot from side to side about said vertical axis; and guidance control means operably attached to said pivotal attachment means for automatically guiding the lateral movement of said frame with respect to said furrow in response to pivoting of said displacement sensing means about said vertical axis; including an improvement wherein: said displacement sensing means includes a first furrow probe means extending into and following the furrow on the lower end thereof and first pivot means for operatively pivotally attaching said first furrow probe means to said pivotal attachment means on the upper end of said furrow probe means along a horizontal axis, and a second furrow probe means for extending into the furrow on the lower end thereof, and a second pivot means for independently operatively pivotally attaching said second furrow probe means to said pivotal attachment means on an upper end of said second furrow probe means, whereby each furrow probe means is capable of overriding an obstruction in said furrow independently of said other furrow probe means, and means for causing said lower end of said second furrow probe means to follow the exact same path over the ground as said lower end of said first furrow probe means whereby said lower end of said second furrow probe means will be always disposed directly behind the lower end of said first furrow probe means in the same general vertical plane.
Claim 2
Dependent Claim
334 words
An improvement for an apparatus for automatically guiding a frame while the frame is moving along the ground to follow a furrow in the ground comprising: a housing attached to said frame; displacement sensing means having an upper portion and a lower portion, said lower portion being disposed behind said upper portion and being adapted to be disposed in the furrow for sensing the lateral position of said housing with respect to the furrow; pivotal attachment means for pivotally attaching said upper portion of said displacement sensing means to said housing along a vertical axis whereby said displacement sensing means can pivot from side to side about said vertical axis; and guidance control means operably attached to said pivotal attachment means for automatically guiding the lateral movement of said frame with respect to said furrow in response to pivoting of said displacement sensing means about said vertical axis; including an improvement wherein: said displacement sensing means includes a first furrow probe means extending into and following the furrow on the lower end thereof and first pivot means for operatively pivotally attaching said first furrow probe means to said pivotal attachment means on the upper end of said furrow probe means along a horizontal axis, and a second furrow probe means for extending into the furrow on the lower end thereof, and a second pivot means for independently operatively pivotally attaching said second furrow probe means to said pivotal attachment means on an upper end of said second furrow probe means, whereby each furrow probe means is capable of overriding an obstruction in said furrow independently of said other furrow probe means, and means for causing said lower end of said second furrow probe means to follow the exact same path over the ground as said lower end of said first furrow probe means whereby said lower end of said second furrow probe means will be always disposed directly behind the lower end of said first furrow probe means in the same general vertical plane.
Claim 3
Dependent Claim
178 words
An improvement in furrow followers of a type adapted to connection to automatic steering mechanisms for causing a vehicle to selectively follow a furrow wherein the improvement comprises: a displacement sensing means for sensing a probe means wherein said displacement sensing means is operably connected to the automatic steering mechanism; a drag plate which is pivotally attached to said displacement sensing means about a horizontal pivot axis wherein said horizontal pivot axis lies within a plane substantially parallel to the surface transversed by said vehicle; a first furrow probe means operably connected to said drag plate wherein said first furrow probe means is disposed in trail position behind said drag plate; and a second furrow probe means operably connected to said drag plate wherein said second furrow probe means is disposed in spaced trail position behind said first probe means, and wherein said second furrow probe means is connected to said drag plate independently of said first probe means, whereby each probe means is capable of overriding an obstruction in said furrow independently of said other probe means.
Claim 4
Dependent Claim
178 words
An improvement in furrow followers of a type adapted to connection to automatic steering mechanisms for causing a vehicle to selectively follow a furrow wherein the improvement comprises: a displacement sensing means for sensing a probe means wherein said displacement sensing means is operably connected to the automatic steering mechanism; a drag plate which is pivotally attached to said displacement sensing means about a horizontal pivot axis wherein said horizontal pivot axis lies within a plane substantially parallel to the surface transversed by said vehicle; a first furrow probe means operably connected to said drag plate wherein said first furrow probe means is disposed in trail position behind said drag plate; and a second furrow probe means operably connected to said drag plate wherein said second furrow probe means is disposed in spaced trail position behind said first probe means, and wherein said second furrow probe means is connected to said drag plate independently of said first probe means, whereby each probe means is capable of overriding an obstruction in said furrow independently of said other probe means.
Claim 5
Dependent Claim
37 words
The improvement in furrow followers as described in claim 2 wherein said first furrow probe means comprises: an elongate member having a first end and a second end; and a furrow probe attached to said second end.
Claim 6
Dependent Claim
37 words
The improvement in furrow followers as described in claim 3 wherein said second furrow probe means comprises: an elongate member having a first end and a second end; and a furrow probe attached to said second end.
Claim 7
Dependent Claim
24 words
The improvement in furrow followers as described in claim 4 wherein said first end of said first probe is attached to said drag plate.
Claim 8
Dependent Claim
30 words
The improvement in furrow followers as described in claim 5 wherein said first end of said second probe means is hinged to said drag plate about a horizontal pivot axis.
Claim 9
Dependent Claim
32 words
The improvement in furrow followers as described in claim 6 wherein said second probe means further comprises a spacing bend between said first end and said second end of said elongate member.
Claim 10
Dependent Claim
24 words
The improvements in furrow followers as described in claim 6 wherein said first furrow probe and said second furrow probe each comprise a canister.
Claim 11
Dependent Claim
192 words
An improvement in furrow followers of a type adapted to connection to automatic steering mechanisms for causing a vehicle to selectively follow a furrow wherein the improvement comprises: a displacement sensing means for sensing a probe means wherein said displacement sensing means is operably connected to the automatic steering mechanism; a drag plate which is hinged to said displacement sensing means about a horizontal pivot axis which lies in a horizontal plane whereby said drag plate may be pivoted in a vertical plane; wherein said horizontal plane is substantially parallel to the surface being traversed by said vehicle and wherein said vertical plane is perpendicular to said horizontal plane; a first furrow probe means operably connected to said drag plate, wherein said first furrow probe means supports only its own weight; and a second furrow probe means operably connected to said drag plate wherein said second furrow probe means supports only its own weight, and wherein said second furrow probe means is connected to said drag plate independently of said first probe means, whereby each probe means is capable of overriding an obstruction in said furrow independently of said other probe means.
Claim 12
Dependent Claim
192 words
An improvement in furrow followers of a type adapted to connection to automatic steering mechanisms for causing a vehicle to selectively follow a furrow wherein the improvement comprises: a displacement sensing means for sensing a probe means wherein said displacement sensing means is operably connected to the automatic steering mechanism; a drag plate which is hinged to said displacement sensing means about a horizontal pivot axis which lies in a horizontal plane whereby said drag plate may be pivoted in a vertical plane; wherein said horizontal plane is substantially parallel to the surface being traversed by said vehicle and wherein said vertical plane is perpendicular to said horizontal plane; a first furrow probe means operably connected to said drag plate, wherein said first furrow probe means supports only its own weight; and a second furrow probe means operably connected to said drag plate wherein said second furrow probe means supports only its own weight, and wherein said second furrow probe means is connected to said drag plate independently of said first probe means, whereby each probe means is capable of overriding an obstruction in said furrow independently of said other probe means.
References Cited (Backward Citations)
US1009546A
Cited
US1105107A
Cited
US2555793A
Cited
US2465660A
Cited
US2789649A
Cited
US2925875A
Cited
US3287835A
Cited
US3395771A
Cited
US3343501A
Cited
US3398975A
Cited
US3402784A
Cited
US3492949A
Cited
US3537531A
Cited
US3708029A
Cited
US3548966A
Cited
US3603405A
Cited
SU540588A1
Cited
US3844372A
Cited
GB1476674A
Cited
FR2360455A1
Cited
US4117889A
Cited
US4184551A
Cited
DE2817843A1
Cited
US4228860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |