US3578182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lumber cart having cradle with variable height
Assignee: Individual
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Filing: 1969-10-02
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Granted: 1971-05-11
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Expires: 1989-10-02
Abstract
Abstract A lumber cart for use in the lumber industry such as a sawmill for receiving lumber pieces one at a time from a conveyor such as a lumber sorter, which categorizes lumber into categories having identical dimensions. The cart includes a rectangular frame supported on four wheels adapted to ride on rails, four stanchions positioned one at each corner and a winchlike mechanism having two spools for winding wire rope cable onto and a brake band and drum portion which creates holding action of the spools stopping rotation of the spool assembly when the brake band is allowed to engage the brake drum. The wire rope cable is arranged between the two forward stanchions and the two rearward stanchions in such a manner that the slack in the suspended cable forms a cradle for receiving the lumber pieces at an elevation near the uppermost portion of the stanchions and the winchlike mechanism enables the cradling portion of the cables to slippingly change elevation downwardly to variable heights. Two of the stanchions, one fore and one aft both being on the same side of the cart, are pivotally attached to the frame allowing them to articulate outwardly facilitating unloading.
Inventors
- 👤 Edward M Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:48
CPC Classifications
B; B65; B65G; B65G57/00; B65G57/02; B65G57/16; B65G57/18; B61; B61D; B61D3/00; B61D3/08; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/102; Y10S414/103; Y10S414/104
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
287 words
A lumber cart comprising a rectangular frame having four corners including a forward pair and a rearward pair of corners, wheel means movably supporting said frame; four stanchions including a forward pair and a rearward pair of stanchions, disposed adjacent the four corners of said frame and upstanding from said frame; a forward elongated flexible member and a rearward elongated flexible member, means fixedly attaching one end of said forward elongated member to one of said forward pair of stanchions and fixedly attaching one end of said rear elongated member to one of said rearward pair of stanchions, means movably suspending said forward elongated member across from said one of said forward pair of stanchions to the other of said forward pair of stanchions to establish a forward cradle, means movably suspending said rearward elongated member across from said one of said rearward pair of stanchions to establish a rearward cradle adapted in conjunction with said forward cradle to hold pieces of lumber, and means for controlling the height of said forward reward cradles relative to said stanchions, means pivotally mounting one of said forward pair of stanchions on said frame at one of said forward corners to establish a forward pivotable stanchion pivotable between a normal vertical position and outwardly tilted unloading positions, said forward pivotable stanchion including an inwardly extending shoe upon which the lumber pieces are adapted to rest, and means pivotally mounting one of said rearward pair of stanchions on said frame at one of said rearward corners to establish a rearward pivotable stanchion pivotable between a normal vertical position and outwardly tilted unloading positions, said rearward pivotable stanchion including an inwardly extending shoe upon which the lumber pieces are adapted to rest.
Claim 2
Dependent Claim
287 words
A lumber cart comprising a rectangular frame having four corners including a forward pair and a rearward pair of corners, wheel means movably supporting said frame; four stanchions including a forward pair and a rearward pair of stanchions, disposed adjacent the four corners of said frame and upstanding from said frame; a forward elongated flexible member and a rearward elongated flexible member, means fixedly attaching one end of said forward elongated member to one of said forward pair of stanchions and fixedly attaching one end of said rear elongated member to one of said rearward pair of stanchions, means movably suspending said forward elongated member across from said one of said forward pair of stanchions to the other of said forward pair of stanchions to establish a forward cradle, means movably suspending said rearward elongated member across from said one of said rearward pair of stanchions to establish a rearward cradle adapted in conjunction with said forward cradle to hold pieces of lumber, and means for controlling the height of said forward reward cradles relative to said stanchions, means pivotally mounting one of said forward pair of stanchions on said frame at one of said forward corners to establish a forward pivotable stanchion pivotable between a normal vertical position and outwardly tilted unloading positions, said forward pivotable stanchion including an inwardly extending shoe upon which the lumber pieces are adapted to rest, and means pivotally mounting one of said rearward pair of stanchions on said frame at one of said rearward corners to establish a rearward pivotable stanchion pivotable between a normal vertical position and outwardly tilted unloading positions, said rearward pivotable stanchion including an inwardly extending shoe upon which the lumber pieces are adapted to rest.
Claim 3
Dependent Claim
69 words
The lumber cart of claim 1 in which said means for controlling the height of said forward and rearward cradles includes spool means rotatably mounted on said frame, means movably guiding said forward and rearward elongated members to said spool means, and means attached to said spool means for winding said elongated members on said spool means to hoist said forward and rearward cradles upwardly relative to said stanchions.
Claim 4
Dependent Claim
48 words
The lumber cart of claim 2 in which said means for controlling the height of said forward and rearward cradles further includes releasable brake means for releasing said spool means to allow said forward and rearward cradles to lower under the weight of the lumber pieces carried thereby.
Claim 5
Dependent Claim
71 words
The lumber car of claim 3 in which said brake means includes a brake drum fixedly mounted relative to said spool means for rotation therewith about the same axis as said spool means, a brake band encircling said brake drum, a brake handle pivotally mounted on one of said stanchions, and means interconnecting said brake handle and said brake band for the actuation of said brake band by said brake handle.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |