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US3872979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Order picker backstop with offload feature in either direction
Assignee: Doosan Bobcat North America Inc
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Filing: 1972-08-18
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Granted: 1975-03-25
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Expires: 1992-08-18
Abstract
Abstract This is a storage system having a stacker which may be operated between two tiers of bins with capability to deposit and remove material from the bins in either tier. The stacker has a horizontally movable shuttle which carries the material in and out of the bins. Located normal to the platform of the shuttle and lying in a plane extending in the direction of movement of the material is a translationally movable stop which is the subject of present invention. This translationally movable stop is spring biased and acts as a firm locating vertically extending stop for the material placed on the shuttle but moves translationally and allows the material to move freely as the shuttle is extended or retracted to place material in the bin or remove it therefrom respectively.
Inventors
- 👤 William E Riedner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:17
CPC Classifications
B; B65; B65G; B65G1/00; B65G1/02; B65G1/04; B65G1/0407
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
283 words
A material handling mechanism including: a horizontally extending material transporting support, a resiliently biased translationally movable stop mechanism located adjacent said material transporting support and extending parallel to the direction of movement of material on said support including: a stop element extending above said material transporting support, a rigid supporting member located on the side of said stop element opposite said material transporting support, a first rigid link pivotally connected at a pivot point near one end of said link to said stop element and pivotally connected at a pivot point near the other end of said link to said rigid supporting member, a second rigid link pivotally connected at a pivot point near one end of said link to said stop element and pivotally connected at a pivot point near the other end of said link to said rigid supporting member, said pivot points so located that lines connecting them in sequence form a parallelogram, and spring biased means biasing said parallelogram into a rectangle in which said material transporting support is capable of transporting said material in two directions of movement parallel to said stop element, whereby said stop element is biased the maximum distance from said rigid support member permitted by said rigid links, and moves translationally away from said material transporting support when frictionally engaged by the material carried by said support, and including, a safety switch capable of stopping the movement of said material transporting support, a means for actuating said safety switch when said stop element is moved translationally a predetermined distance away from said material transporting support, whereby the movement of said stop element over a predetermined distance stops the movement of said material transporting support.
Claim 2
Dependent Claim
283 words
A material handling mechanism including: a horizontally extending material transporting support, a resiliently biased translationally movable stop mechanism located adjacent said material transporting support and extending parallel to the direction of movement of material on said support including: a stop element extending above said material transporting support, a rigid supporting member located on the side of said stop element opposite said material transporting support, a first rigid link pivotally connected at a pivot point near one end of said link to said stop element and pivotally connected at a pivot point near the other end of said link to said rigid supporting member, a second rigid link pivotally connected at a pivot point near one end of said link to said stop element and pivotally connected at a pivot point near the other end of said link to said rigid supporting member, said pivot points so located that lines connecting them in sequence form a parallelogram, and spring biased means biasing said parallelogram into a rectangle in which said material transporting support is capable of transporting said material in two directions of movement parallel to said stop element, whereby said stop element is biased the maximum distance from said rigid support member permitted by said rigid links, and moves translationally away from said material transporting support when frictionally engaged by the material carried by said support, and including, a safety switch capable of stopping the movement of said material transporting support, a means for actuating said safety switch when said stop element is moved translationally a predetermined distance away from said material transporting support, whereby the movement of said stop element over a predetermined distance stops the movement of said material transporting support.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |