Patent US4845867A successfully refreshed from Google Patents.
US4845867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triple-purpose attachment
Assignee: Wausau Machine and Technology Inc
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Filing: 1988-03-14
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Granted: 1989-07-11
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Expires: 2008-03-14
Abstract
Abstract A triple-purpose attachment for articulated back-hoes and the like comprises an earth-working bucket having a clamping/scarifying arm mounted to pivot in an arc about the same axis as the bucket, or about another axis passing through the bucket normal to the longitudinal axis of the dipper stick. The arc is fixed relative to the bucket. The lower end of the arm includes forward and rear teeth, and the arm is pivotably moved by hydraulic motive means to be useful by itself or in combination with the bucket in excavation, ripping, lifting, moving and turning objects.
Inventors
- 👤 Allan J. Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:45
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/962; E02F3/28; E02F3/36; E02F3/40; E02F3/402; E02F3/404; E02F3/407; E02F3/4075; Y; Y10; Y10S; Y10S414/00; Y10S414/125
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
164 words
A unitary triple-purpose attachment for an articulated excavation machine, comprising: an earthworking bucket having two sides joined by a generally concave pan with a leading excavating edge; bucket mounting members fixedly attached to said bucket for pivotably mounting said bucket to said articulated excavation machine for moving and pivoting said bucket; a clamping/scarifying arm having a toothed lower end and mounted at its upper end to said bucket or bucket mounting members to pivot in a fixed arc in a vertical plane bisecting said concave bucket pan from top to bottom, said arm pivotable between an upper position away from said bucket and a lower position wherein said toothed lower end is adjacent said leading excavating edge, wherein said toothed lower end comprises a forward facing sharp tooth and a rearward facing sharp tooth; and hydraulic motive means having one end pivotally attached to said clamping/scarifying arm and having the opposite end thereof pivotably mounted to move said clamping/scarifying arm in said fixed arc.
Claim 2
Dependent Claim
164 words
A unitary triple-purpose attachment for an articulated excavation machine, comprising: an earthworking bucket having two sides joined by a generally concave pan with a leading excavating edge; bucket mounting members fixedly attached to said bucket for pivotably mounting said bucket to said articulated excavation machine for moving and pivoting said bucket; a clamping/scarifying arm having a toothed lower end and mounted at its upper end to said bucket or bucket mounting members to pivot in a fixed arc in a vertical plane bisecting said concave bucket pan from top to bottom, said arm pivotable between an upper position away from said bucket and a lower position wherein said toothed lower end is adjacent said leading excavating edge, wherein said toothed lower end comprises a forward facing sharp tooth and a rearward facing sharp tooth; and hydraulic motive means having one end pivotally attached to said clamping/scarifying arm and having the opposite end thereof pivotably mounted to move said clamping/scarifying arm in said fixed arc.
Claim 3
Dependent Claim
32 words
The triple-purpose attachment according to claim 1, wherein: said hydraulic motive means has said opposite end pivotably mounted on said bucket for controlling position of said clamping/scarfying arm relative to said bucket.
Claim 4
Dependent Claim
21 words
The triple-purpose attachment according to claim 1, wherein: said clamping/scarifying arm is pivotable through an angle of at least 45 degrees.
Claim 5
Dependent Claim
21 words
The triple-purpose attachment according to claim 1, wherein: said clamping/scarifying arm is pivotable through an angle of at least 60 degrees.
Claim 6
Dependent Claim
31 words
The triple-purpose attachment according to claim 1, wherein: said rearward facing sharpened tooth has a sole which rests on said bucket pan when said clamping/scarifying arm is in said lower position.
Claim 7
Dependent Claim
25 words
The triple-purpose attachment according to claim 1, wherein: said clamping-scarifying arm is pivotably attached at its upper end to an upper portion of said pan.
Claim 8
Dependent Claim
54 words
The triple-purpose attachment according to claim 6, wherein: said hydraulic motive means comprises a hydraulic cylinder ram pivotably attached at one end to said pan at a position lower than said upper end of said arm, and having an opposite end pivotably attached to said clamping-scarifying arm for movement thereof relative to said bucket.
Claim 9
Dependent Claim
54 words
The triple-purpose attachment according to claim 6, wherein: said hydraulic motive means comprises a hydraulic cylinder ram pivotably attached at one end to said pan at a position higher than said upper end of said arm, and having an opposite end pivotably attached to said clamping/scarifying arm for movement thereof relative to said bucket.
Claim 10
Dependent Claim
44 words
The triple-purpose attachment according to claim 6, wherein: said hydraulic motive comprises a hydraulic cylinder ram pivotally attached at one end to said bucket mounting members, and having an opposite end pivotably attached to said clamping/scarifying arm for movement thereof relative to said bucket.
Claim 11
Dependent Claim
23 words
The triple-purpose attachment according to claim 1, wherein: said clamping/scarifying arm is pivotably attached at its upper end to said bucket mounting members.
Claim 12
Dependent Claim
51 words
The triple-purpose attachment according to claim 10, wherein: said hydraulic motive means comprises a hydraulic cylinder ram pivotably attached to said pan at a position lower than said upper end of said arm, and having an opposite end pivotably attached to said clamping/scarifying arm for movement thereof relative to said bucket.
Claim 13
Dependent Claim
22 words
The triple-purpose attachment according to claim 1, wherein: said upper part of pan is recessed for passage of said clamping/scarifying arm therethrough.
Claim 14
Dependent Claim
23 words
The triple-purpose attachment according to claim 1, wherein: said upper part of pan is recessed for passage of said hydraulic motive means therethrough.
Claim 15
Dependent Claim
31 words
The triple-purpose attachment according to claim 1, wherein: said clamping/scarifying arm is curved outward away from said bucket in its central portion for clamping objects between said arm and said bucket.
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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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |