Patent US3866780A successfully refreshed from Google Patents.
US3866780A
Expired / Lapsed
US
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Material handling attachment for a forklift truck
Assignee: Weyerhaeuser Co
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Filing: 1973-09-04
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Granted: 1975-02-18
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Expires: 1993-09-04
Abstract
Abstract An attachment for an industrial forklift truck has a plurality of foldable arms an operator can automatically fold to an extended or retracted position. Each of the foldable arm members can be actuated through a series of actuators and appropriate control system to fold flat against the carriage assembly in a manner that cooperates with the load to be handled. Fork arm members are utilized to handle appropriate loads while a pair of side arm members are utilized to clamp and hold appropriate loads. A center arm member can be actuated to allow the side arm members to clamp and hold cylindrical loads.
Inventors
- 👤 Richard Guy Miller
- 👤 Ronald Adair Brudi
- 👤 Kenneth Lynley Brainard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:21
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/183; Y; Y10; Y10S; Y10S414/00; Y10S414/124
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
A carriage assembly for an industrial load handling apparatus of the type adapted to be vertically movable on a frame, wherein the improvement comprises: a carriage bulkhead having a front substantially veRtical face, a plurality of spaced apart fork arm members attached to said bulkhead toward the bottom thereof, means to rotate said fork arm members from an extended working position to a retracted position generally behind said bulkhead, a plurality of side arm members attached to said bulkhead generally at the sides thereof, means to rotate said side arm members from an extended working position to a retracted position juxtaposed against said bulkhead, a center support arm attached to said bulkhead and extending generally in a vertical plane, means to rotate said center support arm from an extended working position to a retracted position juxtaposed against said bulkhead, and said fork arm members, side arm members, and center support arm being rotatable independently of each other depending upon the type of load to be handled.
Claim 2
Dependent Claim
166 words
A carriage assembly for an industrial load handling apparatus of the type adapted to be vertically movable on a frame, wherein the improvement comprises: a carriage bulkhead having a front substantially veRtical face, a plurality of spaced apart fork arm members attached to said bulkhead toward the bottom thereof, means to rotate said fork arm members from an extended working position to a retracted position generally behind said bulkhead, a plurality of side arm members attached to said bulkhead generally at the sides thereof, means to rotate said side arm members from an extended working position to a retracted position juxtaposed against said bulkhead, a center support arm attached to said bulkhead and extending generally in a vertical plane, means to rotate said center support arm from an extended working position to a retracted position juxtaposed against said bulkhead, and said fork arm members, side arm members, and center support arm being rotatable independently of each other depending upon the type of load to be handled.
Claim 3
Dependent Claim
32 words
The improved carriage assembly as in claim 1 in which said side arm members are slidably mounted in said bulkhead so as to be adjustable depending on the load to be handled.
Claim 4
Dependent Claim
29 words
The improved carriage assembly as in claim 1 in which at least one actuating cylinder is operable to rotate said fork arm members between their extended and retracted positions.
Claim 5
Dependent Claim
29 words
The improved carriage assembly as in claim 1 in which at least one actuating cylinder is operable to rotate said side arm members between their extended and retracted positions.
Claim 6
Dependent Claim
29 words
The improved carriage assembly as in claim 1 in which at least one actuating cylinder is operable to rotate said center support arm between its extended and retracted positions.
Claim 7
Dependent Claim
33 words
The improved carriage assembly as in claim 1 in which a stabilizing pad is positioned on said center support arm having opposed curvilinear surfaces so as to stabilize side by side cylindrical loads.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |