Patent US3811516A successfully refreshed from Google Patents.
US3811516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding wing lock
Assignee: Massey Ferguson Inc
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Filing: 1972-11-10
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Granted: 1974-05-21
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Expires: 1992-11-10
Abstract
Abstract A folding wing lock for a disc harrow including a main gang, a folding wing gang pivotally attached to the main gang by a hinge pin for pivotal movement about the axis of the hinge pin, an aperture through the main gang spaced from and parallel to the pivotal axis between the two gangs, and plates rigidly attached to the folding wing gang which are adjacent to each end of the aperture in the main gang and have apertures that may be aligned with the aperture in the main gang. A locking pin is inserted through the aperture in one of the plates, through the aperture in the main gang and then through the aperture in the other plate. A cam on the locking pin contacts a cam surface on one of the plates and upon rotation of the locking pin, rotates the folding wing gang about the axis of the hinge pin until both ends of the locking pin are securely clamped between the plates and the aperture in the main gang.
Inventors
- 👤 H Thompson
- 👤 J Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:19
CPC Classifications
A; A01; A01B; A01B73/00; A01B73/02; A01B73/04; A01B73/044; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/1039
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
270 words
An improved folding wing lock for an agricultural implement characterized by a main gang, a folding wing gang, at least one hinge pin for pivotally attaching the folding wing gang to the main gang, an aperture through one of the gangs spaced from the axis of the hinge pin, a first and a second portion of the other gang including apertures in alignment with the aperture through said one of the gangs, a circular locking pin, with a diameter sufficiently less than the diameter of the apertures through said one of the gangs and through the second portion of the other gang to permit easy insertion of the locking pin, extending through the aperture in said first portion of the other gang, through the aperture in said one of the gangs and then through the aperture in the second portion of the other gang, cam means on the locking pin with a circular cam surface that is eccentric to the longitudinal axis of the locking pin and in contact with said first portion of the other gang said circular cam surface having an eccentricity that is larger than the difference between the diameter of the locking pin and the diameter of the larger of the apertures through said one of the gangs and through the second portion of the other gang so that upon rotation of the cam means the folding wing gang will pivot about the axis of the hinge pin relative to the main gang until a portion of the locking pin spaced from the cam means prevents further pivotal movement about the axis of the hinge pin.
Claim 2
Dependent Claim
270 words
An improved folding wing lock for an agricultural implement characterized by a main gang, a folding wing gang, at least one hinge pin for pivotally attaching the folding wing gang to the main gang, an aperture through one of the gangs spaced from the axis of the hinge pin, a first and a second portion of the other gang including apertures in alignment with the aperture through said one of the gangs, a circular locking pin, with a diameter sufficiently less than the diameter of the apertures through said one of the gangs and through the second portion of the other gang to permit easy insertion of the locking pin, extending through the aperture in said first portion of the other gang, through the aperture in said one of the gangs and then through the aperture in the second portion of the other gang, cam means on the locking pin with a circular cam surface that is eccentric to the longitudinal axis of the locking pin and in contact with said first portion of the other gang said circular cam surface having an eccentricity that is larger than the difference between the diameter of the locking pin and the diameter of the larger of the apertures through said one of the gangs and through the second portion of the other gang so that upon rotation of the cam means the folding wing gang will pivot about the axis of the hinge pin relative to the main gang until a portion of the locking pin spaced from the cam means prevents further pivotal movement about the axis of the hinge pin.
Claim 3
Dependent Claim
24 words
The improved folding wing lock of claim 1 characterized by said cam means comprising a portion that is non-rotatably attached to the locking pin.
Claim 4
Dependent Claim
20 words
The improved folding wing lock of claim 1 characterized by said locking pin being substantially parallel to said hinge pin.
Claim 5
Dependent Claim
269 words
A locking device including a first member, a second member, means pivotally attaching the first member to the second member, an aperture extending through the first member, portions of the second member extending along and adjacent each end of the aperture extending through the first member, a pair of apertures extending through said portions of the second member, a circular locking pin, with a diameter sufficiently less than the diameter of the apertures through the first member and one of the apertures through portions of the second member to permit easy insertion of the locking pin, projecting through one of the apertures in the second member, through the aperture extending through the first member, and through the second aperture in the second member, one of said pair of apertures in the second member acts as a cam surface on the second member, a cam portion on the locking pin including a circular cam surface that is eccentric to the longitudinal axis of the locking pin said circular cam surface having an eccentricity that is larger than the difference between the diameter of the locking pin and the diameter of the aperture through the first member so that upon rotation the circular cam surface contacts the cam surface on the second member and rotates the first member relative to the second member about the axis of the means pivotally attaching the first member to the second member until both ends of the locking pin are rigidly held between the first and second members and pivotal movement of the seCond member relative to the first member in either direction is prevented.
Claim 6
Dependent Claim
269 words
A locking device including a first member, a second member, means pivotally attaching the first member to the second member, an aperture extending through the first member, portions of the second member extending along and adjacent each end of the aperture extending through the first member, a pair of apertures extending through said portions of the second member, a circular locking pin, with a diameter sufficiently less than the diameter of the apertures through the first member and one of the apertures through portions of the second member to permit easy insertion of the locking pin, projecting through one of the apertures in the second member, through the aperture extending through the first member, and through the second aperture in the second member, one of said pair of apertures in the second member acts as a cam surface on the second member, a cam portion on the locking pin including a circular cam surface that is eccentric to the longitudinal axis of the locking pin said circular cam surface having an eccentricity that is larger than the difference between the diameter of the locking pin and the diameter of the aperture through the first member so that upon rotation the circular cam surface contacts the cam surface on the second member and rotates the first member relative to the second member about the axis of the means pivotally attaching the first member to the second member until both ends of the locking pin are rigidly held between the first and second members and pivotal movement of the seCond member relative to the first member in either direction is prevented.
Claim 7
Dependent Claim
34 words
The locking device of claim 4 further including means to positively hold the pin in the apertures when the cam portion has been rotated to lock the first member relative to the second member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |