US3841413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor attachment bar assembly with retractable portions
Assignee: Individual
•
Filing: 1973-05-25
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Granted: 1974-10-15
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Expires: 1993-05-25
Abstract
Abstract A tractor attachment consisting of a main transverse supporting bar carrying depending plows for planter elements, or the like, and being provided with extensible and retractile auxiliary supporting bar segments carrying similar equipment. The auxiliary bar segments can be elevated and retracted to positions overlying the main supporting bar so as to at times reduce the width of the attachment, so as to allow turning at the end of rows, crossing narrow bridges, passing through narrow gates or openings, or the like.
Inventors
- 👤 W Applewhite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:08
CPC Classifications
A; A01; A01B; A01B73/00; A01B63/00; A01B63/02; A01B63/023; A01C; A01C7/00; A01C7/20; A01C7/208; A01D; A01D67/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A tool-carrying attachment for a tractor comprising transversely extending upstanding frame means, means to connect said frame means to a tractor, a main tool bar, means rigidly securing said main tool bar in parallel relation to said upstanding frame means, transversely extending guide means movably connected to said upstanding frame means, said guide means extending substantially parallel to said main tool bar, means mounted on said frame means to selectively raise and lower said transversely extending guide means on said upstanding frame means, a transversely extending support member engaged with said guide means and having means for constraining said support member to move parallel to said main tool bar, a transversely extending auxiliary tool bar rigidly secured to said support member, and means connected to said guide means to selectively move said support member in either direction along said guide means.
Claim 2
Dependent Claim
141 words
A tool-carrying attachment for a tractor comprising transversely extending upstanding frame means, means to connect said frame means to a tractor, a main tool bar, means rigidly securing said main tool bar in parallel relation to said upstanding frame means, transversely extending guide means movably connected to said upstanding frame means, said guide means extending substantially parallel to said main tool bar, means mounted on said frame means to selectively raise and lower said transversely extending guide means on said upstanding frame means, a transversely extending support member engaged with said guide means and having means for constraining said support member to move parallel to said main tool bar, a transversely extending auxiliary tool bar rigidly secured to said support member, and means connected to said guide means to selectively move said support member in either direction along said guide means.
Claim 3
Dependent Claim
24 words
The tool-carrying attachment of claim 1, and ground-engaging support means secured to and depending from said main tool bar and said auxiliary tool bar.
Claim 4
Dependent Claim
56 words
The tool-carrying attachment of claim 2, and wherein the means to selectively raise and lower said transversely extending guide means comprises upstanding endless flexible belt means mounted on said upstanding frame means, motor means on said upstanding frame means drivingly connected to said belt means, and means supportingly connecting said guide means to said belt means.
Claim 5
Dependent Claim
34 words
The tool-carrying attachment of claim 3, and wherein said frame means includes a pair of spaced upstaNding channel members and said belt means comprises respective endless belt members mounted in said upstanding channel members.
Claim 6
Dependent Claim
49 words
The tool-carrying attachment of claim 4, and wherein the means supportingly connecting the guide means to the belt means comprises sleeve members slidably engaged on said channel members, means connecting said sleeve members to the respective endless belt members, and means connecting said sleeve members to the guide means.
Claim 7
Dependent Claim
76 words
The tool-carrying attachment of claim 5, and wherein said guide means comprises a transversely extending inner channel member and said support member comprises an outer channel member telescopically and slidably engaged on said inner channel member, and wherein the means to move the support member along said guide means comprises a drive screw journaled to and contained in said inner channel member and nut means on said outer channel member threadedly engaged by said drive screw.
Claim 8
Dependent Claim
21 words
The tool-carrying attachment of claim 6, and reversible motor means on said inner channel member drivingly connected to said drive screw.
Claim 9
Dependent Claim
17 words
The tool-carrying attachment of claim 7, and wherein said last-named reversible motor means comprises a hydraulic motor.
Claim 10
Dependent Claim
22 words
The tool-carrying attachment of claim 8, and wherein the motor means drivingly connected to the belt means comprises a reversible hydraulic motor.
Claim 11
Dependent Claim
26 words
The tool-carrying attachment of claim 9, and control valve means on the top portion of said upstanding frame means operatively connected to said reversible hydraulic motors.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |