US3878944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane support structure
Assignee: Individual
•
Filing: 1973-08-30
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Granted: 1975-04-22
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Expires: 1993-08-30
Abstract
Abstract A support structure for an otherwise mobile crane in which a ring is secured to the lower car body of the crane, a plurality of arms are vertically pivoted on the car body and extended out beneath the ring at spaced points around the ring periphery, and jacks are carried at the ends of the arms which, when extended, support the ring on the ground and lift the lower car body clear of the ground.
Inventors
- 👤 Dantel E Beduhn
- 👤 Sr James G Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:16
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
In a crane having an upper structure pivoted on a lower car body including means for moving the crane over the ground, the combination comprising, a pair of support beams secured to and forming a part of said lower car body, a track-like ring secured to said beams and horizontally surrounding said lower car body, a plurality of ring support arms pivoted for vertical movement on said lower car body and extending outwardly to underlie said ring as spaced points around the ring, some of said arms being pivoted on said support beams of said caR body, means interengaging said arms and said ring to prevent the arms from swinging away from the ring, and a plurality of jacks one positioned at the end of each of said arms and sized to engage the ground when extended so as to lift the ring, the lower car body and the means for moving the crane relative to the ground.
Claim 2
Dependent Claim
158 words
In a crane having an upper structure pivoted on a lower car body including means for moving the crane over the ground, the combination comprising, a pair of support beams secured to and forming a part of said lower car body, a track-like ring secured to said beams and horizontally surrounding said lower car body, a plurality of ring support arms pivoted for vertical movement on said lower car body and extending outwardly to underlie said ring as spaced points around the ring, some of said arms being pivoted on said support beams of said caR body, means interengaging said arms and said ring to prevent the arms from swinging away from the ring, and a plurality of jacks one positioned at the end of each of said arms and sized to engage the ground when extended so as to lift the ring, the lower car body and the means for moving the crane relative to the ground.
Claim 3
Dependent Claim
158 words
In a crane having an upper structure pivoted on a lower car body including means for moving the crane over the ground, the combination comprising, a pair of support beams secured to and forming a part of said lower car body, a track-like ring secured to said beams and horizontally surrounding said lower car body, a plurality of ring support arms pivoted for vertical movement on said lower car body and extending outwardly to underlie said ring as spaced points around the ring, some of said arms being pivoted on said support beams of said caR body, means interengaging said arms and said ring to prevent the arms from swinging away from the ring, and a plurality of jacks one positioned at the end of each of said arms and sized to engage the ground when extended so as to lift the ring, the lower car body and the means for moving the crane relative to the ground.
Claim 4
Dependent Claim
158 words
In a crane having an upper structure pivoted on a lower car body including means for moving the crane over the ground, the combination comprising, a pair of support beams secured to and forming a part of said lower car body, a track-like ring secured to said beams and horizontally surrounding said lower car body, a plurality of ring support arms pivoted for vertical movement on said lower car body and extending outwardly to underlie said ring as spaced points around the ring, some of said arms being pivoted on said support beams of said caR body, means interengaging said arms and said ring to prevent the arms from swinging away from the ring, and a plurality of jacks one positioned at the end of each of said arms and sized to engage the ground when extended so as to lift the ring, the lower car body and the means for moving the crane relative to the ground.
Claim 5
Dependent Claim
58 words
The combination of claim 1 including a boom carrier pivoted for vertical movement on said upper structure and riding for rotation on said ring, a boom mounted on said boom carrier, a counterweight carrier pivoted for vertical movement on said upper structure and riding for rotation on said ring, and means interconnecting said counterweight carrier and said boom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |