US3792778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane boom stowing mechanism
Assignee: Paxton Mitchell Co
•
Filing: 1972-09-20
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Granted: 1974-02-19
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Expires: 1992-09-20
Abstract
Abstract A crane boom stowing device having a pair of stowing legs secured to the crane frame by means of a universal type joint and detachably securable to a saddle mounted on the boom, thus permitting the boom to be locked in a predetermined position when the crane is transported or stowed.
Inventors
- 👤 A Sholl
- 👤 D Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C2700/00; B66C2700/06; B66C2700/062; B66C2700/065
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
A crane boom stowing device for a crane having a frame, a mast rotatably mounted on the frame and projecting upwardly therefrom, and a boom secured to the free end of the mast, the device comprising: saddle means mounted on the boom; and a first leg means secured on one end thereof to the frame and detachably securable on the other end thereof to said saddle means for substantially preventing the boom from moving relative to the frame.
Claim 2
Dependent Claim
78 words
A crane boom stowing device for a crane having a frame, a mast rotatably mounted on the frame and projecting upwardly therefrom, and a boom secured to the free end of the mast, the device comprising: saddle means mounted on the boom; and a first leg means secured on one end thereof to the frame and detachably securable on the other end thereof to said saddle means for substantially preventing the boom from moving relative to the frame.
Claim 3
Dependent Claim
57 words
A crane boom stowing device as defined in claim 1 and including a second leg means spaced apart from said leg means and secured on one end thereof to the frame and detachably securable on the other end thereof to said saddle means wherein said leg means are disposed opposite each other with the mast disposed therebetween.
Claim 4
Dependent Claim
46 words
A crane boom stowing device as defined in claim 2 wherein each said leg means includes a universal joint secured to said frame and a leg secured on one end thereof to said joint, thereby permitting said leg to rotate and to pivot about said joint.
Claim 5
Dependent Claim
57 words
A crane boom stowing device as defined in claim 3 wherein said saddle means includes a bar means secured to the boom and a pair of spaced apart trough means secured on one end thereof to said bar means, each said trough means having a free end which is open ended and which projects toward said legs.
Claim 6
Dependent Claim
60 words
A crane boom stowing device as defined in claim 4 wherein each joint includes an outwardly projecting externally threaded shank secured thereto and each said leg one end has a hollow internally threaded leg nut axially secured thereto, wherein said leg nut threadably receives said shank thus permitting the combined length of said joint and saiD leg to be varied.
Claim 7
Dependent Claim
41 words
A crane boom stowing device as defined in claim 5 wherein each end of said bar means has a socket indent axially formed therein and each said leg other end has a socket formed thereon for seating in said socket indent.
References Cited (Backward Citations)
SU185031A1
Cited
DE1282271B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |