Patent US3747689A successfully refreshed from Google Patents.
US3747689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular leads
Assignee: Individual
•
Filing: 1971-05-11
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Granted: 1973-07-24
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Expires: 1991-05-11
Abstract
Abstract A leads frame for use with pile driving machines including a plurality of stackable modular elements, the front and rear chords of which are provided with interengaging cooperative locking portions which upon assembly provide a rigid structure of the leads frame.
Inventors
- 👤 L Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:46
CPC Classifications
E; E02; E02D; E02D13/00; E02D13/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
In a pile driving machine having a boom associated with a leads frame the combination comprising a plurality of stackable modular elements having front and rear chords with each of said respective chords being of tubular construction, the front and back chords each terminating in interengaging cooperative portions including locking means at the tops and bottoms thereof, rail means spaced from the front chords, said rail means and said front chords further having opposed surfaces, said front chords providing guideways for a hammer and the rail means forming braking surfaces for the hammer.
Claim 2
Dependent Claim
93 words
In a pile driving machine having a boom associated with a leads frame the combination comprising a plurality of stackable modular elements having front and rear chords with each of said respective chords being of tubular construction, the front and back chords each terminating in interengaging cooperative portions including locking means at the tops and bottoms thereof, rail means spaced from the front chords, said rail means and said front chords further having opposed surfaces, said front chords providing guideways for a hammer and the rail means forming braking surfaces for the hammer.
Claim 3
Dependent Claim
25 words
In a pile driving machine as claimed in claim 1, wherein the hammer includes a portion that glides between the rail and the front chord.
Claim 4
Dependent Claim
33 words
In a pile driving machine as claimed in claim 1, wherein at least one of the locking means for said front and rear chords is disposed in alignment with one of the chords.
Claim 5
Dependent Claim
35 words
In a pile driving machine as claimed in claim 1, wherein at least one of the locking means for said stackable modular elements is interposed between said confronting surfaces of the front and rear guideways.
Claim 6
Dependent Claim
21 words
In a pile driving machine as claimed in claim 1, wherein said locking means is disposed laterally of said braking means.
Claim 7
Dependent Claim
27 words
In a pile driving machine as claimed in claim 1, wherein at least one of said locking means includes a portion carried by one of the chords.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |