Patent US3734302A successfully refreshed from Google Patents.
US3734302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traveling monotower crane base
Assignee: Richier SA
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Filing: 1971-06-04
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Granted: 1973-05-22
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Expires: 1991-06-04
Abstract
Abstract The base according to this invention for a traveling monotower crane consists only of lower and upper concrete beams, whether reinforced or prestressed, assembled to one another and to the tower and carrier trucks of the crane, by means of tie-rods extending vertically therethrough in order to impart a high strength to the assembly and improve the stability of the tower. The tie-rods extend preferably through guide tubes embedded in the concrete and the nuts provided at the ends of these tie-rods bear against the concrete faces through the medium of stressdistributing plates. The tower may preferably be mounted adjacent one end of the upper beams, in order to increase the useful radius of the crane and therefore its working efficiency measured in tons/meter (FIG. 7).
Inventors
- 👤 P Durand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:41
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0378
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
Base for a travelling tower crane for use on a construction site, said crane being of the type wherein a single perpendicular tower is used which has upstanding elements to form its frame and has trolley and balance weight booms mounted on top of its frame for free slewing motion, said base comprising: four rigid trucks, each having carrier rollers; tracks for said rollers, disposed along said construction site; a system of four concrete beams, each having a cross-section larger than the horizontal dimensions of said upstanding elements, a first pair of said concrete beams extending along the tracks and another pair extending across the tracks, one of said pairs being supported by the other and the other being supported by said trucks; three sets of tie rod means for securing together, respectively, said trucks and other pair of concrete beams, said one and other pair of concrete beams, and the lower portion of said tower and said one pair of concrete beams, with the perpendicular center line of said tower being located adjacent the center of one of said four trucks.
Claim 2
Dependent Claim
182 words
Base for a travelling tower crane for use on a construction site, said crane being of the type wherein a single perpendicular tower is used which has upstanding elements to form its frame and has trolley and balance weight booms mounted on top of its frame for free slewing motion, said base comprising: four rigid trucks, each having carrier rollers; tracks for said rollers, disposed along said construction site; a system of four concrete beams, each having a cross-section larger than the horizontal dimensions of said upstanding elements, a first pair of said concrete beams extending along the tracks and another pair extending across the tracks, one of said pairs being supported by the other and the other being supported by said trucks; three sets of tie rod means for securing together, respectively, said trucks and other pair of concrete beams, said one and other pair of concrete beams, and the lower portion of said tower and said one pair of concrete beams, with the perpendicular center line of said tower being located adjacent the center of one of said four trucks.
Claim 3
Dependent Claim
22 words
Base according to claim 1 wherein said center line of the tower passes equidistantly between the concrete beams of said one pair.
Claim 4
Dependent Claim
20 words
Base according to claim 2 wherein said center line of the tower passes through one of said other concrete beams.
Claim 5
Dependent Claim
111 words
Base for a travelling crane of the type wherein a single tower is formed substantially of upstanding frame elements and has trolley and balance weight booms mounted thereon for free slewing motion, said base comprising: a system of rigid trucks, each having carrier rollers for travel along a track; a system of concrete beams, each having a cross-section of side lengths several times as long as the transverse (horizontal) dimensions of said frame elements; and tie rod means extending vertically through said concrete beams for assembling said system of concrete beams with the base of said tower and with the tops of said trucks as a strong and substantially distortion-free structure.
Claim 6
Dependent Claim
111 words
Base for a travelling crane of the type wherein a single tower is formed substantially of upstanding frame elements and has trolley and balance weight booms mounted thereon for free slewing motion, said base comprising: a system of rigid trucks, each having carrier rollers for travel along a track; a system of concrete beams, each having a cross-section of side lengths several times as long as the transverse (horizontal) dimensions of said frame elements; and tie rod means extending vertically through said concrete beams for assembling said system of concrete beams with the base of said tower and with the tops of said trucks as a strong and substantially distortion-free structure.
Claim 7
Dependent Claim
11 words
Base according to claim 4, wherein said concrete beams are reinforced.
Claim 8
Dependent Claim
11 words
Base according to claim 4 wherein said concrete beams are prestressed.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |