US3575242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marker lift
Assignee: Case LLC
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Filing: 1969-01-31
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Granted: 1971-04-20
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Expires: 1989-01-31
Abstract
Abstract A flexible cable connecting right- and left-hand markers of an agricultural implement such as a grain drill, is provided with a central balance bar having a limited slidable connection with a swingable lift arm for the markers and having stops engageable with the arm to raise one of the markers and lower the other, the lift arm being operated by a hydraulic cylinder electrically actuated from a remote switch.
Inventors
- 👤 Nils O Olsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:11
CPC Classifications
A; A01; A01B; A01B69/00; A01B69/02; A01B69/024
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
253 words
In a tractor-propelled implement having a frame and a pair of transversely spaced right- and left-hand markers mounted thereon for alternate movement between raised nonoperating and lowered operating positions, flexible cable means having opposite free ends, said flexible cable means extending between and having said ends operatively connected to said markers for moving them between said positions upon longitudinally shifting the cable means, means for effecting said shifting of the cable means including a lever arm mounted on the frame operatively connected to said cable means medially of said ends and swingable in directions longitudinally of said cable means to shift said cable means in directions to raise one marker and lower the other, said connection between said lever arm and said cable means including lost-motion means accommodating limited relative movement between the arm and the cable means effective to permit the marker in operating position to rise and fall with the contour of the ground independently of said arm, said lost-motion means comprising a relatively inflexible member forming part of said cable means having a slidable connection with said lever arm and having space stops thereon alternately engageable with said lever arm after a predetermined swinging thereof to shift the cable means, power-operated force transmitting means mounted on the frame operatively connected to said lever arm for swinging said lever arm in opposite directions, and electrically operated control means operatively connected to said power transmission means including switch means movable between two positions to control the operation of said power transmission means.
Claim 2
Dependent Claim
253 words
In a tractor-propelled implement having a frame and a pair of transversely spaced right- and left-hand markers mounted thereon for alternate movement between raised nonoperating and lowered operating positions, flexible cable means having opposite free ends, said flexible cable means extending between and having said ends operatively connected to said markers for moving them between said positions upon longitudinally shifting the cable means, means for effecting said shifting of the cable means including a lever arm mounted on the frame operatively connected to said cable means medially of said ends and swingable in directions longitudinally of said cable means to shift said cable means in directions to raise one marker and lower the other, said connection between said lever arm and said cable means including lost-motion means accommodating limited relative movement between the arm and the cable means effective to permit the marker in operating position to rise and fall with the contour of the ground independently of said arm, said lost-motion means comprising a relatively inflexible member forming part of said cable means having a slidable connection with said lever arm and having space stops thereon alternately engageable with said lever arm after a predetermined swinging thereof to shift the cable means, power-operated force transmitting means mounted on the frame operatively connected to said lever arm for swinging said lever arm in opposite directions, and electrically operated control means operatively connected to said power transmission means including switch means movable between two positions to control the operation of said power transmission means.
Claim 3
Dependent Claim
231 words
In a tractor-propelled implement having a frame and a pair of transversely spaced right- and left-hand markers mounted thereon for alternate movement in a vertical plane between a generally horizontal operating position of one of said markers and a generally vertical raised nonoperating position wherein said markers are interconnected by flexible cable means extending therebetween, whereby motion of one marker from its raised nonoperating position to its lowered operating position is transmittable to the other marker to move it from its lowered operating position to its raised nonoperating position, the combination of an arm mounted on the frame for transverse swinging movement, wherein the swinging of said arm is effected by the provision of a two-way hydraulic fluid cylinder mounted on the frame and operatively connected to said arm, part of the stroke of the cylinder being utilized to slide said arm over said relatively rigid member until it engages one of said stops, said cable means including a relatively rigid member slidably connected to said arm, said relatively rigid member having stops spaced from each other and arranged such that they are alternately engaged by said arms forming operative connections therewith upon swinging the latter in opposite directions to alternately raise and lower said markers, said slidable connection accommodating vertical floating movement of the operating marker in response to variations in ground contour independently of the swinging of said arm.
Claim 4
Dependent Claim
231 words
In a tractor-propelled implement having a frame and a pair of transversely spaced right- and left-hand markers mounted thereon for alternate movement in a vertical plane between a generally horizontal operating position of one of said markers and a generally vertical raised nonoperating position wherein said markers are interconnected by flexible cable means extending therebetween, whereby motion of one marker from its raised nonoperating position to its lowered operating position is transmittable to the other marker to move it from its lowered operating position to its raised nonoperating position, the combination of an arm mounted on the frame for transverse swinging movement, wherein the swinging of said arm is effected by the provision of a two-way hydraulic fluid cylinder mounted on the frame and operatively connected to said arm, part of the stroke of the cylinder being utilized to slide said arm over said relatively rigid member until it engages one of said stops, said cable means including a relatively rigid member slidably connected to said arm, said relatively rigid member having stops spaced from each other and arranged such that they are alternately engaged by said arms forming operative connections therewith upon swinging the latter in opposite directions to alternately raise and lower said markers, said slidable connection accommodating vertical floating movement of the operating marker in response to variations in ground contour independently of the swinging of said arm.
Claim 5
Dependent Claim
43 words
The invention set forth in claim 2, wherein said cable means comprises a pair of flexible cable sections operatively connected at their outer ends to the respective of said markers and at their inner ends to the ends of said relatively rigid member.
Claim 6
Dependent Claim
45 words
The invention set forth in claim 3, wherein electric means operatively connected to said hydraulic fluid cylinder is provided for controlling the flow of fluid to said cylinder and said electric means is actuated by an operatively connected remote switch accessible to tHe tractor operator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |