Patent US3782503A successfully refreshed from Google Patents.
US3782503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mast stabilizer for lift trucks
Assignee: Security Pacific Business Credit Inc
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Filing: 1972-12-14
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Granted: 1974-01-01
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Expires: 1992-12-14
Abstract
Abstract A stabilizer for reducing side-tilting moments in a lift truck mast by overcoming the moments imposed by side loads on the mast. An endless chain loop tauntily positioned on either side of the mast by a separating column with a sprocket at each end. One side of the chains is connected to the load bearing structure and the other side of the chains is anchored. One of the sprockets engaging each of the chains are connected together by a common torque shaft whereby any side loads on the carriage is transmitted to the chains and the torque shaft to compensate for the side loads.
Inventors
- 👤 S Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:24
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A mast stabilizer for a lift truck having an elevating mast for raising and lowering a load bearing structure comprising, a pair of endless chains positioned adjacent the mast, each chain including a chain support having a sprocket at each end engaging the endless chain, a torsion shaft fixedly secured to one of the sprockets on each of the chains, support means between the chain support in each chain, the first side of each of the chains being connected to the load bearing structure, and the second side of each of the chains being anchored whereby side loads on the load bearing structure is transmitted to the chains and torsion shaft to compensate for the side loads.
Claim 2
Dependent Claim
117 words
A mast stabilizer for a lift truck having an elevating mast for raising and lowering a load bearing structure comprising, a pair of endless chains positioned adjacent the mast, each chain including a chain support having a sprocket at each end engaging the endless chain, a torsion shaft fixedly secured to one of the sprockets on each of the chains, support means between the chain support in each chain, the first side of each of the chains being connected to the load bearing structure, and the second side of each of the chains being anchored whereby side loads on the load bearing structure is transmitted to the chains and torsion shaft to compensate for the side loads.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein the second side of the chains are anchored at points in the same horizontal plane.
Claim 4
Dependent Claim
130 words
A mast stabilizer for a lift truck having a telescoping mast including a fixed mast section and a movable mast section for raising and lowering a carriage comprising, a pair of endless chains positioned on opposite sides of the mast, each chain supported on a support column having a sprocket at each end engaging the endless chain, a torsion shaft fixedly secured between one of the sprockets on each of the chains, support means between the columns in each of the chains, the first side of each of the chains being connected to the carriage, and the second side of each of the chains being fixedly secured to the truck whereby side loads on the carriage is transmitted to the chains and torque shaft to compensate for the side loads.
Claim 5
Dependent Claim
130 words
A mast stabilizer for a lift truck having a telescoping mast including a fixed mast section and a movable mast section for raising and lowering a carriage comprising, a pair of endless chains positioned on opposite sides of the mast, each chain supported on a support column having a sprocket at each end engaging the endless chain, a torsion shaft fixedly secured between one of the sprockets on each of the chains, support means between the columns in each of the chains, the first side of each of the chains being connected to the carriage, and the second side of each of the chains being fixedly secured to the truck whereby side loads on the carriage is transmitted to the chains and torque shaft to compensate for the side loads.
Claim 6
Dependent Claim
170 words
A stabilized mast for a lift truck comprising, a load bearing structure, a generally vertically positioned telescoping mast including a fixed mast section and a movable mast section for raising and lowering the load bearing structure, a pair of endless chains generally positioned in a vertical plane on opposite sides of the mast, each chain carried by and held in tension on a column having a sprocket at each end engaging the interior of the endless chain, a torsion shaft fixedly secured between one pair of opposed sprockets on each of the chains, support means between the columns in each of the chains, said support means connected to the movable mast section, one side of each of the chains being connected to the load bearing structure, and the other side of each of the chains being connected to the truck at points substantially in the same horizontal plane whereby side loads on the load bearing structure is transmitted through the chains and torque shaft to compensate for the side loads.
Claim 7
Dependent Claim
170 words
A stabilized mast for a lift truck comprising, a load bearing structure, a generally vertically positioned telescoping mast including a fixed mast section and a movable mast section for raising and lowering the load bearing structure, a pair of endless chains generally positioned in a vertical plane on opposite sides of the mast, each chain carried by and held in tension on a column having a sprocket at each end engaging the interior of the endless chain, a torsion shaft fixedly secured between one pair of opposed sprockets on each of the chains, support means between the columns in each of the chains, said support means connected to the movable mast section, one side of each of the chains being connected to the load bearing structure, and the other side of each of the chains being connected to the truck at points substantially in the same horizontal plane whereby side loads on the load bearing structure is transmitted through the chains and torque shaft to compensate for the side loads.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |