Patent DE2425401A1 successfully refreshed from Google Patents.
Patent US3825128A successfully refreshed from Google Patents.
US3825128A
Expired / Lapsed
US
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Sway-arrest system
Assignee: Fruehauf Corp
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Filing: 1971-08-23
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Granted: 1974-07-23
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Expires: 1991-08-23
Abstract
Abstract A sway-arrest suspension system for a gantry crane, including a trolley having a plurality of sheaves mounted in a pair of movable sheave heads held within the trolley. The sheave heads move over the same set of rails on which the trolley moves and support a load engaging means by reeving which is acted upon by sheaves held in the load engaging means to arrest sway of the load.
Inventors
- 👤 G Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:33
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/04; B66C13/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A sway-arrest system for arresting pendulum motion of a suspended load relative to the lifting platform of a crane, comprising a trolley capable of being mounted on a pair of rails held in said crane, said trolley having a rigid frame and movable sheave mounts adjustably carried within said frame, actuating means connected to said movable sheave mounts for displacing said sheave mounts with respect to each other in said frame, a load engaging means suspended from said sheave mounts by reeving depending from sheaves carried therein, said load engaging means including a pair of sheave nests mounted at opposed ends of said load engaging means, each of said sheave nests having a plurality of axially and longitudinally spaced sheaves fixed therein, whereby the reeving passing over said fixed sheaves is acted upon by the fixed sheaves to produce compensating forces to stabilize said load.
Claim 2
Dependent Claim
145 words
A sway-arrest system for arresting pendulum motion of a suspended load relative to the lifting platform of a crane, comprising a trolley capable of being mounted on a pair of rails held in said crane, said trolley having a rigid frame and movable sheave mounts adjustably carried within said frame, actuating means connected to said movable sheave mounts for displacing said sheave mounts with respect to each other in said frame, a load engaging means suspended from said sheave mounts by reeving depending from sheaves carried therein, said load engaging means including a pair of sheave nests mounted at opposed ends of said load engaging means, each of said sheave nests having a plurality of axially and longitudinally spaced sheaves fixed therein, whereby the reeving passing over said fixed sheaves is acted upon by the fixed sheaves to produce compensating forces to stabilize said load.
Claim 3
Dependent Claim
22 words
The sway-arrest system of claim 1, wherein each of said sheave nests comprises six sheaves mounted about a center of said nest.
Claim 4
Dependent Claim
28 words
The sway-arrest system of claim 2, wherein said six sheaves mounted within each of said nests are arrayed in two sets of three sheaves lying in parallel planes.
Claim 5
Dependent Claim
28 words
The sway-arrest system of claim 3, wherein said load engaging means includes a quick-change headblock supporting said sheave nests and a lifting spreader removably secured to said headblock.
Claim 6
Dependent Claim
22 words
The sway-arrest system of claim 3, wherein said load engaging means comprises a lifting spreader having said sheave nests mounted directly thereon.
Claim 7
Dependent Claim
161 words
A sway-arrest system for arresting pendulum motion of a suspended load relative to the lifting platform of a crane, comprising a trolley capable of being mounted on a pair of rails held in said crane, said trolley having a rigid frame and movable sheave mounts adjustably carried within said frame, actuating means connected to said movable sheave mounts for displacing said sheave mounts with respect to each other in said frame. a load engaging means suspended from said sheave mounts by reeving depending from sheaves carried therein, said load engaging means including a pair of sheave nests mounted at opposed ends of said load engaging means, each of said sheave nests having six axially and longitudinally spaced sheaves fixed therein and arrayed so as to have two sets of three sheaves lyinG in parallel planes, whereby the reeving passing over each of said sets of sheaves is acted upon by the fixed sheaves to produce compensating forces to stabilize said load.
Claim 8
Dependent Claim
161 words
A sway-arrest system for arresting pendulum motion of a suspended load relative to the lifting platform of a crane, comprising a trolley capable of being mounted on a pair of rails held in said crane, said trolley having a rigid frame and movable sheave mounts adjustably carried within said frame, actuating means connected to said movable sheave mounts for displacing said sheave mounts with respect to each other in said frame. a load engaging means suspended from said sheave mounts by reeving depending from sheaves carried therein, said load engaging means including a pair of sheave nests mounted at opposed ends of said load engaging means, each of said sheave nests having six axially and longitudinally spaced sheaves fixed therein and arrayed so as to have two sets of three sheaves lyinG in parallel planes, whereby the reeving passing over each of said sets of sheaves is acted upon by the fixed sheaves to produce compensating forces to stabilize said load.
Claim 9
Independent Claim
84 words
A method for arresting pendulum motion of a suspended load relative to the lifting platform of a crane, comprising the steps of: a. suspending said load from said lifting platform by reeving held between a pair of movable sheave mount heads for angulating said load, and b. threading said reeving through a plurality of fixed sheaves supported on load engaging means supporting said load in such a manner that said fixed sheaves act against said reeving to produce compensating forces to stabilize said load.
Claim 10
Independent Claim
84 words
A method for arresting pendulum motion of a suspended load relative to the lifting platform of a crane, comprising the steps of: a. suspending said load from said lifting platform by reeving held between a pair of movable sheave mount heads for angulating said load, and b. threading said reeving through a plurality of fixed sheaves supported on load engaging means supporting said load in such a manner that said fixed sheaves act against said reeving to produce compensating forces to stabilize said load.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |