Patent US4638680A successfully refreshed from Google Patents.
US4638680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bucket linkage
Assignee: Case LLC
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Filing: 1985-08-22
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Granted: 1987-01-27
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Expires: 2005-08-22
Abstract
Abstract The present invention relates to the connection of a bucket to a boom arm in a manner that provides increased break out power and increased speed as the bucket travels through its operational cycle for overall increased ground removal. This is accomplished by offsetting the hinge point of the bucket relative to the standard pivot position and providing a modified linkage assembly that automatically adjusts the bucket radius as measured between the bucket and its hinge point.
Inventors
- 👤 Allan Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:30
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/3604; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18936; Y10T74/20; Y10T74/20558
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
217 words
An attaching means for attaching a bucket to a boom arm for rotation about said arm between a first position and a second position, said attachment means comprising: an offset hinge point on said arm positioned a predetermined distance from the longitudinal center line of said arm; said bucket pivotally connected to said offset hinge point such that said bucket is rotatable about said arm; and a linkage system interconnecting said bucket to said arm, said system having a continually adjustable power point that automatically reduces the radius of bucket rotation as measured between said power point and said hinge point as said bucket rotates from said first position to said second position, thereby providing increased power at said first position and continually increasing the bucket speed as said bucket rotates to said second position; and said linkage system further comprising: a first link pivotally connected at one end to said arm adjacent said offset, a second link pivotally connected at one end to said arm a spaced distance from said first link, and a third link pivotally interconnecting the opposite ends of said first and second links; said first and third links connected by a pin which is received by and moveable within a slot formed in said bucket thereby forming said continually adjustable power point.
Claim 2
Dependent Claim
217 words
An attaching means for attaching a bucket to a boom arm for rotation about said arm between a first position and a second position, said attachment means comprising: an offset hinge point on said arm positioned a predetermined distance from the longitudinal center line of said arm; said bucket pivotally connected to said offset hinge point such that said bucket is rotatable about said arm; and a linkage system interconnecting said bucket to said arm, said system having a continually adjustable power point that automatically reduces the radius of bucket rotation as measured between said power point and said hinge point as said bucket rotates from said first position to said second position, thereby providing increased power at said first position and continually increasing the bucket speed as said bucket rotates to said second position; and said linkage system further comprising: a first link pivotally connected at one end to said arm adjacent said offset, a second link pivotally connected at one end to said arm a spaced distance from said first link, and a third link pivotally interconnecting the opposite ends of said first and second links; said first and third links connected by a pin which is received by and moveable within a slot formed in said bucket thereby forming said continually adjustable power point.
Claim 3
Dependent Claim
21 words
The attachment means of claim 1, wherein said slot is positioned substantially perpendicular to the arc of rotation of said bucket.
References Cited (Backward Citations)
US4046026A
Cited
US4381167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |