US3814026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing apparatus for lift trucks
Assignee: AC MATERIAL HANDLING Corp 777 MANOR PARK DRIVE COLUMBUS OHIO 43228 A CORP OHIO
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Filing: 1973-02-02
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Granted: 1974-06-04
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Expires: 1993-02-02
Abstract
Abstract A lift truck is equipped with front and rear stabilizing rollers on its underside which cooperate with a guide rail disposed centrally in a narrow aisle of a storage facility. The rollers and guide rail cooperate to provide lateral and longitudinal stability for the lift truck thereby permitting stacking and retrieving of rated capacity loads at greater heights. In one embodiment the rear stabilizing rollers are mounted on a trolley which is connected to the truck steering mechanism whereby the steering of the truck is automatically corrected to maintain proper truck alignment on the stabilizing guide rail.
Inventors
- 👤 J Maloney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:10
CPC Classifications
B; B62; B62D; B62D37/00; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/07559
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
Stabilizing apparatus for a lift truck of the type having a frame, a lift mast assembly, a steering mechanism, laterally spaced support wheels, said apparatus comprising: a fixed I-shaped horizontal guide rail structure, a first pair of laterally spaced rollers rotatably mounted on the central front underside of said mast assembly of said lift truck and adapted to engage a pair of downwardly facing surfaces of said fixed horizontal guide rail structure, a second pair of laterally spaced rollers rotatably mounted at the lower central rear frame of said lift truck and adapted to engage said pair of downwardly facing surfaces of said guide rail structure a fixed laterally spaced horizontal channel means located parallel to said guide rail structure and operative to receive said spaced support wheels when said pairs of said spaced rollers are engaged with said guide rail structure, and means rigidly connecting said channel means with said guide rail structure.
Claim 2
Dependent Claim
154 words
Stabilizing apparatus for a lift truck of the type having a frame, a lift mast assembly, a steering mechanism, laterally spaced support wheels, said apparatus comprising: a fixed I-shaped horizontal guide rail structure, a first pair of laterally spaced rollers rotatably mounted on the central front underside of said mast assembly of said lift truck and adapted to engage a pair of downwardly facing surfaces of said fixed horizontal guide rail structure, a second pair of laterally spaced rollers rotatably mounted at the lower central rear frame of said lift truck and adapted to engage said pair of downwardly facing surfaces of said guide rail structure a fixed laterally spaced horizontal channel means located parallel to said guide rail structure and operative to receive said spaced support wheels when said pairs of said spaced rollers are engaged with said guide rail structure, and means rigidly connecting said channel means with said guide rail structure.
Claim 3
Dependent Claim
70 words
The stabilizing apparatus of claim 1 wherein said first pair of rollers are rotatably mounted on a support pivotally mounted on said mast assembly on a transverse pivot axis and wherein engagable abutments are formed on said support and truck limiting downward swinging of said support and first pair of rollers whereby said trucK is stabilized against lateral tilting and said rollers and support may swing upwardly to clear obstructions.
Claim 4
Dependent Claim
58 words
The stabilizing apparatus of claim 2 wherein said second pair of rollers are pivotally mounted on a vertically swinging first part of a trolley and a second part of said trolley is pivotally mounted on said truck frame on a vertical pivot axis, said first part being pivotally connected to said second part on a transverse pivot axis.
Claim 5
Dependent Claim
43 words
The stabilizing apparatus of claim 3 wherein said first and second parts have engagable abutments limiting downward swinging movement of said first part and second pair of rollers relative to said second part whereby said truck is stabilized against forward and lateral tilting.
Claim 6
Dependent Claim
38 words
The stabilizing apparatus of claim 4 wherein said second part of said trolley is connected to said steering mechanism of said truck whereby pivoting of said trolley about said vertical axis causes steering adjustment of said steering mechanism.
Claim 7
Dependent Claim
19 words
The stabilizing apparatus of claim 1 wherein said rollers have radial flanges adapted to engage said guide rail structure.
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |