US3677348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic alternator
Assignee: Case LLC
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Filing: 1971-03-15
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Granted: 1972-07-18
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Expires: 1991-03-15
Abstract
Abstract An implement vertically movable between an operating and transport position including a row marker on each side of the implement that is raised and lowered by a separate hydraulic cylinder. The cylinders receive fluid from a common source through a valve that is controlled by actuating means that are responsive to vertical movement of the implement.
Inventors
- 👤 Charles Boetto
- 👤 Wayne L Orkwiszewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:05
CPC Classifications
A; A01; A01B; A01B69/00; A01B69/02; A01B69/024
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
210 words
In an implement having a frame, a pair of alternately operable members mounted on the frame and hydraulic cylinders mounted on the frame operatively connected to said members; valve means fixedly mounted relative to said frame and having a pair of ports, conduit means connecting each port to one of said hydraulic cylinders, a plunger shiftable in the valve means, and means for shifting said plunger to open one of said ports and close the other to direct fluid to or from one or the other of said cylinders to alternately operate said members comprising: a lever pivotally mounted medially of its ends on said plunger, a slide member mounted to slide in a fixed path relative to said frame, means establishing a sliding pivotal connection between one end of said lever and said slide member, abutment means on said lever for engagement with said slide member when said slide member is reciprocated in both directions, said abutment means including a first abutment means at the one end of said lever extending into the plane of said slide member, said first abutment means engaged by said slide member when the latter is moved in one direction to rock the lever about its sliding pivotal connection and thereby shift said plunger.
Claim 2
Dependent Claim
210 words
In an implement having a frame, a pair of alternately operable members mounted on the frame and hydraulic cylinders mounted on the frame operatively connected to said members; valve means fixedly mounted relative to said frame and having a pair of ports, conduit means connecting each port to one of said hydraulic cylinders, a plunger shiftable in the valve means, and means for shifting said plunger to open one of said ports and close the other to direct fluid to or from one or the other of said cylinders to alternately operate said members comprising: a lever pivotally mounted medially of its ends on said plunger, a slide member mounted to slide in a fixed path relative to said frame, means establishing a sliding pivotal connection between one end of said lever and said slide member, abutment means on said lever for engagement with said slide member when said slide member is reciprocated in both directions, said abutment means including a first abutment means at the one end of said lever extending into the plane of said slide member, said first abutment means engaged by said slide member when the latter is moved in one direction to rock the lever about its sliding pivotal connection and thereby shift said plunger.
Claim 3
Dependent Claim
64 words
The invention set forth in claim 1, wherein said abutment means includes second abutment means on said slide member at its sliding pivotal connection end, a follower member carried by said lever at said one end arranged to engage said second abutment means upon movement of said slide member in the other direction, to shift said lever about its pivotal mounting on said plunger.
Claim 4
Dependent Claim
40 words
The invention set forth in claim 2, wherein said second abutment means is a cam face on the slide member engageable with said one end of said lever to move the latter laterally of the path of said slidable member.
Claim 5
Dependent Claim
62 words
The invention set forth in claim 3, wherein a V-shaped slot is provided in the frame, and said pivot means is a pin receivable in said slot and a pin carried by the other end of said lever adapted to be received in and shiftable along said V-shaped slot upon engagement of said cam face with said one end of said lever.
Claim 6
Dependent Claim
47 words
The invention set forth in claim 1, wherein a part is movably mounted on the frame for raising and lowering the implement, and is operatively connected to said slide member to move the latter in opposite directions in response to the raising and lowering of the frame.
Claim 7
Dependent Claim
47 words
The invention set forth in claim 2, wherein a part is movably mounted on the frame for raising and lowering the implement, and is operatively connected to said slide member to move the latter in opposite directions in response to the raising and lowering of the frame.
Claim 8
Dependent Claim
47 words
The invention set forth in claim 3, wherein a part is movably mounted on the frame for raising and lowering the implement, and is operatively connected to said slide member to move the latter in opposite directions in response to the raising and lowering of the frame.
Claim 9
Dependent Claim
47 words
The invention set forth in claim 4, wherein a part is movably mounted on the frame for raising and lowering the implement, and is operatively connected to said slide member to move the latter in opposite directions in response to the raising and lowering of the frame.
Claim 10
Dependent Claim
32 words
The invention as set forth in claim 5, wherein a spring means anchored on said frame creates a bias on said pin urging said pin towards the ends of said V-shaped groove.
References Cited (Backward Citations)
US3250333A
Cited
US3587750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |