US4070772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground excavating apparatus
Assignee: Komatsu Ltd
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Filing: 1975-09-24
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Granted: 1978-01-31
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Expires: 1995-09-24
Abstract
Abstract Such a ground excavating apparatus that conducts excavation of a soft stratum by means of a bucket and employs an impact crusher for the excavation of such a hard stratum as a rock bed or the like is disclosed. Introduced in the present application is a ground excavator of such a category that comprises a housing, a bucket boom properly set in place in the said housing in a manner of being capable of traveling forward and rearward, a bucket properly fitted in place on the front end section of the said bucket boom in a manner of being capable of inclining, and an impact crushing mechanism well capable of traveling forward and rearward by virtue of a hydraulic jack housed in the said bucket boom, and employs the said bucket and the said impact crushing mechanism in an alternate manner to best suit the nature of the ground to be excavated.
Inventors
- 👤 Mitsuteru Motomura
- 👤 Chiaki Kojima
- 👤 Hiroshi Ohta
- 👤 Akira Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:32
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/966; E02F3/28; E02F3/283; E02F3/286; E21; E21D; E21D9/00; E21D9/01; E21D9/10; E21D9/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A ground excavating apparatus comprising a supporting member, a bucket boom fitted on said supporting member such that it travels in the forward and rearward directions, a bucket fitted on the top end section of the bucket boom such that it can be inclined with respect to the boom, said bucket having a plurality of flukes on the forward end thereof, means for impact crushing housed in said bucket boom and capable of traveling in the forward and rearward directions, primary means of operation positioned on said supporting member, for operating said bucket boom for causing it to travel forward and rearward, secondary means of operation positioned on said bucket boom, for operating said means for impact crushing to cause it to travel forward and rearward, and means of operation for inclination positioned on said bucket boom, for inclining said bucket.
Claim 2
Dependent Claim
141 words
A ground excavating apparatus comprising a supporting member, a bucket boom fitted on said supporting member such that it travels in the forward and rearward directions, a bucket fitted on the top end section of the bucket boom such that it can be inclined with respect to the boom, said bucket having a plurality of flukes on the forward end thereof, means for impact crushing housed in said bucket boom and capable of traveling in the forward and rearward directions, primary means of operation positioned on said supporting member, for operating said bucket boom for causing it to travel forward and rearward, secondary means of operation positioned on said bucket boom, for operating said means for impact crushing to cause it to travel forward and rearward, and means of operation for inclination positioned on said bucket boom, for inclining said bucket.
Claim 3
Dependent Claim
35 words
The ground excavating apparatus set forth in the claim 1 above, wherein said means of impact crushing is housed in a guide boom so positioned in said bucket boom as to be capable of sliding.
Claim 4
Dependent Claim
45 words
The ground excavating apparatus set forth in the claim 2 above, wherein said means of impact crushing comprises an impact-generating mechanism as is positioned in said guide boom, and a chisel as is set in place on the top end section of said impact-generating mechanism.
Claim 5
Dependent Claim
25 words
The ground excavating apparatus set forth in the claim 2 above, wherein said bucket boom has a locking mechanism which fixes said guide boom thereon.
Claim 6
Dependent Claim
28 words
The ground excavating apparatus set forth in the claim 1 above, wherein said primary means of operation and said secondary means of operation each comprise a sliding jack.
Claim 7
Dependent Claim
22 words
The ground excavating apparatus set forth in the claim 1 above, wherein said means of operation for inclination is a bucket jack.
Claim 8
Dependent Claim
151 words
A ground excavating apparatus comprising a vehicle having a mounting bracket thereon; a supporting member including a housing pivotally connected to said bracket; a bucket boom fitted in the housing of said supporting member such that it travels in the forward and rearward directions, a bucket as is fitted in place on the end of the bucket boom such that it can be inclined, means for impact crushing fitted in the housing of said supporting member above said bucket boom, said means of impact crushing traveling in the forward and rearward directions, primary means of operation positioned in said housing, for operating said bucket boom for causing it to travel forward and rearward, secondary means of operation positioned in the housing for operating said means of impact crushing to cause it to travel forward and rearward, and means of operation for inclination positioned on said bucket boom, for inclining said bucket.
Claim 9
Dependent Claim
151 words
A ground excavating apparatus comprising a vehicle having a mounting bracket thereon; a supporting member including a housing pivotally connected to said bracket; a bucket boom fitted in the housing of said supporting member such that it travels in the forward and rearward directions, a bucket as is fitted in place on the end of the bucket boom such that it can be inclined, means for impact crushing fitted in the housing of said supporting member above said bucket boom, said means of impact crushing traveling in the forward and rearward directions, primary means of operation positioned in said housing, for operating said bucket boom for causing it to travel forward and rearward, secondary means of operation positioned in the housing for operating said means of impact crushing to cause it to travel forward and rearward, and means of operation for inclination positioned on said bucket boom, for inclining said bucket.
Claim 10
Dependent Claim
144 words
A ground excavating apparatus comprising a vehicle having a mounting bracket thereon, a supporting member including a housing pivotally connected to said bracket, a bucket boom fitted in the housing of said supporting member such that it travels in the forward and rearward directions, a bucket fitted on the forward end of the bucket boom such that it can be inclined, said bucket including an impact receiver on the rear end thereof, means for impact crushing fitted on the forward end of said bucket boom above said bucket, said means for impact crushing traveling in the forward and rearward directions to strike said impact receiver on said bucket, primary means of operation positioned on said supporting member for operating said bucket boom for causing it to travel forward and rearward, means of operation for inclination positioned on said bucket boom, for inclining said bucket.
Claim 11
Dependent Claim
144 words
A ground excavating apparatus comprising a vehicle having a mounting bracket thereon, a supporting member including a housing pivotally connected to said bracket, a bucket boom fitted in the housing of said supporting member such that it travels in the forward and rearward directions, a bucket fitted on the forward end of the bucket boom such that it can be inclined, said bucket including an impact receiver on the rear end thereof, means for impact crushing fitted on the forward end of said bucket boom above said bucket, said means for impact crushing traveling in the forward and rearward directions to strike said impact receiver on said bucket, primary means of operation positioned on said supporting member for operating said bucket boom for causing it to travel forward and rearward, means of operation for inclination positioned on said bucket boom, for inclining 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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |