Patent US3652795A successfully refreshed from Google Patents.
US3687306A
Expired / Lapsed
US
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Unstacking machine
Assignee: Marley Wollongong Ltd
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Filing: 1970-11-04
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Granted: 1972-08-29
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Expires: 1990-11-04
Abstract
Abstract A machine for handling stacked articles, such as concrete masonry blocks, has two trolleys fitted with gripping attachments. One gripping attachment is used to lift the articles from a stack and deposits them on a conveyor. The other trolley and gripping attachment removes the articles from the conveyor and places them on a second conveyor. From the second conveyor, the articles may be fed to a required destination which, in the case of concrete masonry blocks, may be a splitting machine.
Inventors
- 👤 Arthur Charles Ransom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
B; B65; B65G; B65G59/00; B65G59/02; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/11
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
206 words
A machine for automatically handling a layer of stacked rows of articles comprising a frame supporting a conveyor assembly having a first conveyor with front loading and rear delivery positions and a second conveyor at the delivery end of the first conveyor in the same horizontal plane, a carriageway above the first conveyor extending forwardly thereof out over a loading zone and rearwardly across the width of the second conveyor, a first vertically reciprocating clamp assembly on a platform suspended from a first trolley reciprocating horizontally along the carriageway between forward loading and rearward unloading positions, a second vertically reciprocating clamp assembly mounted on a travelling platform suspended from a second trolley smaller than the first trolley and reciprocating horizontally along the carriageway between a loading position at the rear of the first conveyor and an unloading position out over the second conveyor, the width of the second trolley along the carriageway being substantially equal to a double row of said articles and the return movement of said trolley being synchronized with that of a double gate mechanism operating at the rear or delivery end of the first conveyor for transferring batches of double rows of said articles from said first conveyor to said second conveyor.
Claim 2
Dependent Claim
206 words
A machine for automatically handling a layer of stacked rows of articles comprising a frame supporting a conveyor assembly having a first conveyor with front loading and rear delivery positions and a second conveyor at the delivery end of the first conveyor in the same horizontal plane, a carriageway above the first conveyor extending forwardly thereof out over a loading zone and rearwardly across the width of the second conveyor, a first vertically reciprocating clamp assembly on a platform suspended from a first trolley reciprocating horizontally along the carriageway between forward loading and rearward unloading positions, a second vertically reciprocating clamp assembly mounted on a travelling platform suspended from a second trolley smaller than the first trolley and reciprocating horizontally along the carriageway between a loading position at the rear of the first conveyor and an unloading position out over the second conveyor, the width of the second trolley along the carriageway being substantially equal to a double row of said articles and the return movement of said trolley being synchronized with that of a double gate mechanism operating at the rear or delivery end of the first conveyor for transferring batches of double rows of said articles from said first conveyor to said second conveyor.
Claim 3
Dependent Claim
147 words
A machine according to claim 1, wherein a free riding rotating member is pivotally mounted on the frame adjacent the first conveyor and is adapted to ride in frictional contact with the upper surface of units moving along the first conveyor and remote from the front or loading end of the first conveyor, the free riding member being adapted to drop down from the upper surface of the units onto the upper surface of the first conveyor to actuate a cut off device on the conveyor to intermittently stop movement of the conveyor and to actuate return movement of the front trolley back to the front or loading end of the first conveyor and forwardly out over the stack of units to be lowered down onto the stack to lower the clamp members from the platform onto or alongside the topmost row of units in the stack.
Claim 4
Dependent Claim
90 words
A machine according to claim 1 wherein the clamp assembly of the first trolley platform comprises a fixed gripping jaw and an opposed moving jaw actuated by a hydraulic or pneumatic ram assembly and wherein the moving jaw member is provided with pressure sensing means adapted to increase the pressure on a top layer of units of a stack to a predetermined level and then to trip a switch device actuating the pulley assembly elevating the gripping platform together with its load onto a loading position on the first conveyor.
Claim 5
Dependent Claim
146 words
A machine according to claim 3 wherein the frame or housing is provided with means adjacent the sides of the first conveyor supporting a rotatable shaft member extending transversely across the conveyor supporting a gate member of the double gate mechanism for units travelling along the conveyor and actuated by a rotating member on one end of a bell crank lever contacting cam means fixed to the platform of the rear trolley, the other end of the bell crank lever having tension means attached to a fixed support and wherein the gate member functions as a stop to prevent movement of the units along the conveyor until the rear trolley returns to the rear delivery position of the first conveyor after discharging two rows of units onto the second conveyor, the cam means actuating said roller on the bell crank lever thereby elevating the gate member.
References Cited (Backward Citations)
US3487959A
Cited
US3534872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |