US3920137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavating machine with clamshell bucket
Assignee: Individual
•
Filing: 1974-04-08
•
Granted: 1975-11-18
•
Expires: 1994-04-08
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 the bucket about a laterally extending axis. The bucket support has downwardly extending lugs which pivotally receive a king pin. The king pin is also received in 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 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 two buckets of the clamshell. 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. The buckets can be rotated relative to the bucket bracket.
Inventors
- 👤 Willard E Mccain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:04
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/413; E02F3/4135; B; B66; B66C; B66C3/00; B66C3/14; B66C3/16; B66C3/20; E02F3/3604; E02F3/3677; E02F3/3681
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
214 words
In combination, a dipper stick, a first bucket and a second bucket, a bucket support means having laterally spaced upwardly extending side members, the end of said dipper stick being disposed between said side members and pivotably connected thereto, means supporting said buckets about a first axis comprising a transverse pin extending through said side members and through said dipper stick and swingably connecting said bucket support means to said dipper stick, tilting means connected to said bucket support means and to said dipper stick for tilting said bucket support means about said transverse pin, a tilt support, upwardly extending brackets connected to said tilt support, downwardly extending brackets on said bucket support means, and a king pin extending through said downwardly extending brackets and through said upwardly extending brackets, a bucket bracket pivotally connected to said tilt support, a first link fixed to said first bucket, a second link fixed to said second bucket, first pivot means connecting said first link to said bucket bracket, second pivot means pivotally connecting said second link to said bucket bracket, and means for swinging said first bucket relative to said bucket bracket, and means for swinging said second bucket relative to said bucket bracket whereby said buckets can be swung toward and away from each other.
Claim 2
Dependent Claim
214 words
In combination, a dipper stick, a first bucket and a second bucket, a bucket support means having laterally spaced upwardly extending side members, the end of said dipper stick being disposed between said side members and pivotably connected thereto, means supporting said buckets about a first axis comprising a transverse pin extending through said side members and through said dipper stick and swingably connecting said bucket support means to said dipper stick, tilting means connected to said bucket support means and to said dipper stick for tilting said bucket support means about said transverse pin, a tilt support, upwardly extending brackets connected to said tilt support, downwardly extending brackets on said bucket support means, and a king pin extending through said downwardly extending brackets and through said upwardly extending brackets, a bucket bracket pivotally connected to said tilt support, a first link fixed to said first bucket, a second link fixed to said second bucket, first pivot means connecting said first link to said bucket bracket, second pivot means pivotally connecting said second link to said bucket bracket, and means for swinging said first bucket relative to said bucket bracket, and means for swinging said second bucket relative to said bucket bracket whereby said buckets can be swung toward and away from each other.
Claim 3
Dependent Claim
34 words
The combination recited in claim 1 wherein a pivot means is provided, pivotally connceting said bucket support means to said tilt support, and means to rotate said bucket bracket relative to said tilt support.
Claim 4
Dependent Claim
55 words
The combination recited in claim 1 wherein said bucket support means has side plates, a top plate and a pivot means connecting said top plate to the bottom plate of said tilt support, and said pivot means extends through said top plate of said bucket bracket and through said bottom plate of said tilt support.
Claim 5
Dependent Claim
51 words
The combination recited in claim 1 wherein said tilt support has side plates and end plates and is generally rectangular in cross section, a first bucket cylinder swingably connected to one said side plate, and a second bucket cylinder swingably connected to the other said side plate of said bucket bracket.
Claim 6
Dependent Claim
32 words
The combination recited in claim 1 wherein motor means is connected between said bucket bracket and said tilt support for rotating said bucket bracket and said tilt support relative to eacH other.
Claim 7
Dependent Claim
98 words
The combination recited in claim 1 wherein said means for swinging a 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 said dipper stick, said second end of said second link being pivotally connected to said bucket support.
Claim 8
Dependent Claim
50 words
The combination recited in claim 6 wherein two said first hydraulic cylinders are supported on said bucket support and each a 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 9
Dependent Claim
38 words
The combination recited in claim 7 wherein said first bucket has a relatively flat top plate thereon, said spaced axially extending flanges are fixed to said top plate, said spaced lugs comprise said upwardly extending axially spaced means.
Claim 10
Dependent Claim
41 words
The combination recited in claim 7 wherein said upwardly extending axially spaced means attached to said first bucket comprise, second flanges fixed to said bucket, and pin means extending through said flange means connecting said second bucket to said first bucket.
Claim 11
Dependent Claim
49 words
The combination recited in claim 9 wherein said king pin has spaced crank members fixed to the intermediate part thereof, and said piston rod of said second cylinder is received between said crank means whereby said buckets are swung relative to each other to operate as a clamshell bucket.
Claim 12
Dependent Claim
26 words
The combination recited in claim 10 wherein pivot means is provided on said bucket support generally parallel to said king pin pivotally supporting said first cylinders.
Claim 13
Dependent Claim
42 words
The combination recited in claim 10 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 14
Dependent Claim
38 words
The combination recited in claim 7 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 15
Dependent Claim
138 words
In combination, a dipper stick and a clamshell bucket, bucket support means swingably connected to said dipper stick to swing about a laterally extending axis, means to swing said bucket support about said laterally extending axis, said clamshell bucket comprising a first bucket part and a second bucket part, means swingably connecting said first bucket part to said bucket support to swing about an axially extending axis, and means to swing said first bucket part about said laterally extending axis, said first bucket part having laterally spaced flanges supported thereon, laterally spaced flanges on said second bucket part, and means pivotally connecting said second bucket part to said first bucket part, laterally spaced cylinders connected to said first bucket part and to said second bucket part for swinging said second bucket part relative to said first bucket part.
Claim 16
Dependent Claim
138 words
In combination, a dipper stick and a clamshell bucket, bucket support means swingably connected to said dipper stick to swing about a laterally extending axis, means to swing said bucket support about said laterally extending axis, said clamshell bucket comprising a first bucket part and a second bucket part, means swingably connecting said first bucket part to said bucket support to swing about an axially extending axis, and means to swing said first bucket part about said laterally extending axis, said first bucket part having laterally spaced flanges supported thereon, laterally spaced flanges on said second bucket part, and means pivotally connecting said second bucket part to said first bucket part, laterally spaced cylinders connected to said first bucket part and to said second bucket part for swinging said second bucket part relative to said first bucket part.
Claim 17
Dependent Claim
35 words
The combination recited in claim 14 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 18
Dependent Claim
30 words
The combination recited in claim 15 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |