Patent US4106645A successfully refreshed from Google Patents.
US4106645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for quick attachment of implement to a tractor
Assignee: Individual
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Filing: 1977-07-18
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Granted: 1978-08-15
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Expires: 1997-07-18
Abstract
Abstract A device for the easy and quick connection of a front mounted implement to a tractor including a hook means adapted to lift the device and spring-loaded pin means to fix the position of the device relative to the hook.
Inventors
- 👤 Rudolph G. Janish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:13
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/3604; E02F3/3609; E02F3/3631; E02F3/3645; E02F3/3672
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A device for providing quick attachment of implements to a tractor comprising a framework adapted to be attached to said tractor, said framework including hook means at its upper part and guide means at its lower part, implement attaching means including spaced apart walls on an implement adapted to embrace said hook means and guide means, upper pin means extending between said walls engageable with said hooks, lower movable pin means extendable into holes formed in said guide means, spring means engaging said movable pin means to bias said pins toward a position fully inserted into said holes in the guide means, said movable pin means including pins and means on said pins adapted to hold said pins partly withdrawn, said quide means being formed in a V-shape whereby insertion of said guide means between said walls will cause engagement of said guide means with said pin to press the pin outward against said spring means until said pins are aligned with said holes in said guide means.
Claim 2
Independent Claim
168 words
A device for providing quick attachment of implements to a tractor comprising a framework adapted to be attached to said tractor, said framework including hook means at its upper part and guide means at its lower part, implement attaching means including spaced apart walls on an implement adapted to embrace said hook means and guide means, upper pin means extending between said walls engageable with said hooks, lower movable pin means extendable into holes formed in said guide means, spring means engaging said movable pin means to bias said pins toward a position fully inserted into said holes in the guide means, said movable pin means including pins and means on said pins adapted to hold said pins partly withdrawn, said quide means being formed in a V-shape whereby insertion of said guide means between said walls will cause engagement of said guide means with said pin to press the pin outward against said spring means until said pins are aligned with said holes in said guide means.
Claim 3
Dependent Claim
41 words
The device of claim 1 in which said lower pins are slidably journalled in ears mounted on said implement adjacent one of said walls for each pin, said spring being engaged between one of said ears and means on said pin.
Claim 4
Dependent Claim
57 words
The device of claim 2 in which said means on said pin engaged by said spring is a fin formed on said pin, one of said ears being formed with a slot through which said fin can move, said pin being rotatable so that said fin can be moved into and out of register with said slot.
References Cited (Backward Citations)
US2935802A
Cited
DE1079472B
Cited
US3266817A
Cited
US3389819A
Cited
US3512665A
Cited
FR2302012A1
Cited
US3985249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |