US4069637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular section boom
Assignee: Caterpillar Inc
•
Filing: 1976-08-09
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Granted: 1978-01-24
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Expires: 1996-08-09
Abstract
Abstract A boom for an excavator or the like is constructed to have a generally L-shape when viewed in side elevation and have a circular cross section tapering downward from a maximum diameter at the apex of the boom to each end. The boom is made up of a central body portion consisting of a cast-form elbow and a pair of tapered tubular members formed of rolled plate welded along a longitudinal seam extending from the elbow outward to the outer ends of the boom. A pair of cast-formed connecting members are then welded to the end of the boom. The method of fabrication includes the cast-forming of the elbow and the respective end connecting means and forming the tapered body members by rolling and connecting the entire assembly by welding.
Inventors
- 👤 Arthur Bevan Midgley Braithwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:12
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/32; E02F3/36; E02F3/38
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A boom comprising: an elongated tubular body having first and second ends and a circular cross section throughout said body between said ends; first connecting means secured to said body for connecting said boom to mounting means for supporting said boom; and second connecting means secured to said body and located between the first and second ends thereof for connecting manipulating means for manipulating said boom, said tubular body including tapered portions extending longitudinally away from a maximum diameter in the vicinity of said second connecting means to lesser diameters of the first and second ends thereof; and an elbow-shaped casting connected intermediate said tapered portions.
Claim 2
Dependent Claim
106 words
A boom comprising: an elongated tubular body having first and second ends and a circular cross section throughout said body between said ends; first connecting means secured to said body for connecting said boom to mounting means for supporting said boom; and second connecting means secured to said body and located between the first and second ends thereof for connecting manipulating means for manipulating said boom, said tubular body including tapered portions extending longitudinally away from a maximum diameter in the vicinity of said second connecting means to lesser diameters of the first and second ends thereof; and an elbow-shaped casting connected intermediate said tapered portions.
Claim 3
Dependent Claim
33 words
The boom of claim 1 wherein said first connecting means is secured to said body at said first end; and said second connecting means is secured to said body intermediate the ends thereof.
Claim 4
Dependent Claim
20 words
The boom of claim 2 wherein said body is formed in a substantially L-shaped configuration when viewed in side elevation.
Claim 5
Dependent Claim
40 words
The boom of claim 1 wherein each of the tapered portions of said body comprises a plate rolled into a tapered tubular configuration; and continuous weld means securing abutting edges of said plate along the length of said tapered portion.
Claim 6
Dependent Claim
24 words
The boom of claim 1 comprising annular weld means connecting an end of each of said tapered portions to the ends of said casting.
Claim 7
Dependent Claim
20 words
The boom of claim 1 wherein said second connecting means comprises a pin extending through a bore in said casting.
Claim 8
Dependent Claim
19 words
The boom of claim 1 further comprising third connecting means secured to the second end of said tubular body.
Claim 9
Dependent Claim
24 words
The boom of claim 7 wherein said first and said third connecting means are castings welded to the respective ends of said tubular body.
Claim 10
Dependent Claim
20 words
The boom of claim 4 wherein said abutting edges of said plate are located along a side of said boom.
Claim 11
Dependent Claim
15 words
The boom of claim 11 wherein said abutting edges are located below the horizontal axis.
References Cited (Backward Citations)
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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) | 1981-01-23 | 1981-07-25 | 1982-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-23 | 1985-07-25 | 1986-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-23 | 1989-07-25 | 1990-01-24 | $7700.00 | Window Closed / Lapsed |