US3896950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavating machine
Assignee: Individual
•
Filing: 1974-01-02
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Granted: 1975-07-29
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Expires: 1994-01-02
Abstract
Abstract The application discloses a backhoe dipper stick and clamshell bucket combination. A bucket support is pivoted to the dipper stick and a cylinder is connected to the dipper stick to swing and bucket about laterally extending axis. The bucket support has downwardly extending lugs which pivotally receive a king pin. The king pin is also received in the upwardly extending lugs connected to a tilt support and fixed to them. The king pin has crank arms fixed to an intermediate part of it and the crank arms are connected to the piston rod of a tilting cylinder which is supported on the bucket support. The tilting cylinder will tilt the bucket about the axially extending king pin. The tilt support has a pivot member connected to it and the pivot member is connected to a bucket bracket. The bucket bracket pivotally supports links that are fixed to each of the buckets. The bucket cylinder is connected to each side of the bucket bracket and the bucket cylinders each have a piston rod connected to one of the buckets so that the buckets can be swung toward each other and away from each other providing a full clamshell bucket action.
Inventors
- 👤 Willard E Mccain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:54
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/413; E02F3/4135; E02F3/3604; E02F3/3677
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
269 words
In combination, a dipper stick and a clamshell bucket, said clamshell bucket being made up of a first bucket member and a second bucket member, a bucket support, said dipper stick being swingably connected to said bucket support, means to swing said bucket support relative to said dipper stick, axially spaced downwardly extending lugs fixed to said bucket support, said first bucket member having two first spaced axially extending flanges fixed thereto and two second spaced axially extending flanges fixed thereto and disposed between said first axially extending flanges, said second bucket member having two spaced lugs fixed thereto, and two third spaced axially extending flanges fixed to said second bucket member and disposed between said lugs on said second bucket member and, upwardly extending lugs fixed to said first bucket member and disposed between said second axially extending flanges, means connecting said lugs on said second bucket member to said second flanges on said first bucket member, king pin means extending through said downwardly extending lugs and through said upwardly extending lugs, said king pin means being fixed to said upwardly extending lugs, crank means fixed to said king pin means and first hydraulic cylinder means connected to said bucket support and said crank means for swinging said bucket about said king pin means, means swingably connecting said first flanges and said third flanges whereby said second bucket member is swingably connected to said first bucket member, and second hydraulic cylinder means connected to said first flanges and to said lugs on said second bucket member for swinging said second bucket member relative to said first bucket member.
Claim 2
Dependent Claim
269 words
In combination, a dipper stick and a clamshell bucket, said clamshell bucket being made up of a first bucket member and a second bucket member, a bucket support, said dipper stick being swingably connected to said bucket support, means to swing said bucket support relative to said dipper stick, axially spaced downwardly extending lugs fixed to said bucket support, said first bucket member having two first spaced axially extending flanges fixed thereto and two second spaced axially extending flanges fixed thereto and disposed between said first axially extending flanges, said second bucket member having two spaced lugs fixed thereto, and two third spaced axially extending flanges fixed to said second bucket member and disposed between said lugs on said second bucket member and, upwardly extending lugs fixed to said first bucket member and disposed between said second axially extending flanges, means connecting said lugs on said second bucket member to said second flanges on said first bucket member, king pin means extending through said downwardly extending lugs and through said upwardly extending lugs, said king pin means being fixed to said upwardly extending lugs, crank means fixed to said king pin means and first hydraulic cylinder means connected to said bucket support and said crank means for swinging said bucket about said king pin means, means swingably connecting said first flanges and said third flanges whereby said second bucket member is swingably connected to said first bucket member, and second hydraulic cylinder means connected to said first flanges and to said lugs on said second bucket member for swinging said second bucket member relative to said first bucket member.
Claim 3
Dependent Claim
98 words
The combination recited in claim 1 wherein said means for swinging said bucket about said laterally extending axis comprises a first link and a second link, each having a first end and a second end, and a third hydraulic cylinder having a piston rod, pivot means connecting said first end of said first link, said first end of said second link, and the distal end of said piston rod together, said second end of said first link being pivotally connected to the dipper stick, said second end of said second link being pivotally connected to said bucket support.
Claim 4
Dependent Claim
50 words
The combination recited in claim 2 wherein two said first hydraulic cylinder are supported on said bucket support and each said first hydraulic cylinder having a piston rod, two cranks fixed to said king pin, each said piston rod of said first hydraulic cylinder being fixed to a said crank.
Claim 5
Dependent Claim
57 words
The combination recited in claim 3 wherein said first bucket member and said second bucket member each have a relatively flat top plate thereon, said first lugs, first flanges and said second flanges are fixed to said top plate said second lugs and said third flanges are fixed to said flat plate on said second bucket member.
Claim 6
Dependent Claim
29 words
The combination recited in claim 3 wherein said king pin has two spaced crank members, and said piston rod of said first cylinder is received between said two cranks.
Claim 7
Dependent Claim
26 words
The combination recited in claim 5 wherein pivot means is provided on said bucket support generally parallel to said king pin pivotally supporting said first cylinders.
Claim 8
Dependent Claim
42 words
The combination recited in claim 5 wherein two said first links are provided disposed one on each side of said dipper stick, and two said second links are provided disposed one on each side of said first links and said bucket support.
Claim 9
Dependent Claim
38 words
The combination recited in claim 1 wherein said bucket support has spaced side plates fixed thereto and extendiNg upwardly therefrom, said dipper stick is connected to said bucket support by means connected to said upwardly extending side plates.
Claim 10
Dependent Claim
35 words
The combination recited in claim 1 wherein said first bucket part has a flat top, said means connecting said first bucket part to said bucket support comprises spaced flanges pivotally connected to said bucket support.
Claim 11
Dependent Claim
30 words
The combination recited in claim 1 wherein said second bucket part is removable from said first bucket part whereby said first bucket part is useable as an earth working device.
References Cited (Backward Citations)
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US3252606A
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US3273729A
Cited
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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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |