US3684113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dunnage clamp for forklift trucks
Assignee: DELTA RESOURCES INCORPORATED A CORP OF WA
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Filing: 1970-06-12
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Granted: 1972-08-15
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Expires: 1990-06-12
Abstract
Abstract An auxiliary fork arrangement is disclosed in connection with forklift trucks for clamping and transporting dunnage simultaneously with the carrying of a load, especially of piles of lumber. Hydraulic actuators are incorporated into the lifting carriage for moving the auxiliary fork members laterally relative to the main forklift members so that any dunnage boards or planks which are inserted under a stack of lumber or other load may be firmly clamped between the main and auxiliary fork members prior to lifting the load and carrying it to its desired location. When the load is deposited at the new location, the dunnage members are then in the desired position under the load. The actuators are then caused to move the auxiliary fork members away from the main fork members, thereby releasing the dunnage members, and the truck can then withdraw the fork members from beneath the load.
Inventors
- 👤 Robert L Roller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:16
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14; B66F9/147; B66F9/142; B66F9/143
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
For use with forklift trucks having a carriage movable transversely with respect to its supporting means on said truck and main fork members on said carriage for lifting a load which is held a short distance off the supporting surface by means of dunnage members arranged approximately parallel to said fork members, dunnage carrying means comprising: auxiliary fork members on said carriage positioned adjacent each of said main fork members, one of said main and auxiliary fork members including a shoe member pivotally attached at the edge nearest its adjacent fork member, and power operated means operable to move said auxiliary fork members transversely with respect to said carriage toward said main fork members to thereby clamp said dunnage members between said main and auxiliary fork members such that said dunnage members will be moved with said load.
Claim 2
Dependent Claim
138 words
For use with forklift trucks having a carriage movable transversely with respect to its supporting means on said truck and main fork members on said carriage for lifting a load which is held a short distance off the supporting surface by means of dunnage members arranged approximately parallel to said fork members, dunnage carrying means comprising: auxiliary fork members on said carriage positioned adjacent each of said main fork members, one of said main and auxiliary fork members including a shoe member pivotally attached at the edge nearest its adjacent fork member, and power operated means operable to move said auxiliary fork members transversely with respect to said carriage toward said main fork members to thereby clamp said dunnage members between said main and auxiliary fork members such that said dunnage members will be moved with said load.
Claim 3
Dependent Claim
22 words
Dunnage carrying means as set forth in claim 1 wherein said auxiliary fork members are substantially shorter than said main fork members.
Claim 4
Dependent Claim
40 words
Dunnage carrying means as set forth in claim 1 wherein said auxiliary fork members are positioned toward the outside of said main fork members and are moved inwardly to clamp said dunnage members and outwardly to release said dunnage members.
Claim 5
Dependent Claim
130 words
Dunnage carrying means for a forklift truck having a vehicle body, a carriage attached to said body, lift fork members supported on said carriage, and power operated means for moving said lift fork members vertically for enabling a load to be lifted and transported comprising: auxiliary fork members on said carriage positioned adjacent to each of said lift fork members, said auxiliary fork members being substantially lighter and shorter than said lift fork members, and one of each pair of said lift and auxiliary fork members including a shoe member pivotally attached at the edge nearest its adjacent fork member, and power operated means operable to move said auxiliary fork members transversely with respect to said lift fork members to clamp said dunnage between said auxiliary and lift fork members.
Claim 6
Dependent Claim
130 words
Dunnage carrying means for a forklift truck having a vehicle body, a carriage attached to said body, lift fork members supported on said carriage, and power operated means for moving said lift fork members vertically for enabling a load to be lifted and transported comprising: auxiliary fork members on said carriage positioned adjacent to each of said lift fork members, said auxiliary fork members being substantially lighter and shorter than said lift fork members, and one of each pair of said lift and auxiliary fork members including a shoe member pivotally attached at the edge nearest its adjacent fork member, and power operated means operable to move said auxiliary fork members transversely with respect to said lift fork members to clamp said dunnage between said auxiliary and lift fork members.
References Cited (Backward Citations)
US2995263A
Cited
FR1426409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |