Patent US3777867A successfully refreshed from Google Patents.
US3777867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller trackway construction
Assignee: Individual
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Filing: 1972-01-10
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Granted: 1973-12-11
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Expires: 1992-01-10
Abstract
Abstract A roller conveyor or roller track includes a delivery end having a stop against which materials which are carried on a pallet are delivered. The delivery area includes control means in the form of a lever which is located adjacent the end stop in a position such that it is depressed by the material or its pallet when it arrives at the delivery point. The lever is connected to control means which is engageable with the next quantity of material or its pallet which is delivered toward the delivery point. The control means is effective to hold the next pallet at a spaced location from the pallet which has already arrived at the delivery point so that it will not interfere with this pallet when the latter is removed such as by a fork truck which is engageable therewith. As soon as the pallet is removed from the delivery point, the next pallet may move forwardly to the end position of the delivery area adjacent the stop in a position at which it may be engaged for removal without interference from the pallet which is next to the delivery area.
Inventors
- 👤 D Durwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:12
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/22; B65G47/26; B65G47/28; B65G47/29
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
442 words
In a roller trackway defining a path of load movement for movement of loads, which are substantially uniform in length, successively to a delivery point, and including a plurality of load-supporting rollers rotatably mounted in laterally spaced side rails, arresting means operable, responsive to arrival of a load at the delivery point, to arrest and retain an immediately following load at a holding point, spaced upstream from the delivery point by a distance in excess of the length of a load, until a load then at the delivery point has been removed from the trackway, said arresting means comprising, in combination, a twoarm swivel lever mounted, intermediate its ends, at said holding point adjacent a side rail for bodily displacement laterally of said side rail and pivotal movement relative to said side rail; said lever having a first arm, extending in the direction of travel of the loads and constituting a braking arm, and a second arm, extending in the opposite direction and constituting a stop arm; control means movably mounted at said delivery point and normally projecting into the path of load movement into said delivery point, said control means being engaged and retracted by each load reaching said delivery point and held retracted by the load until the load is removed from the trackway; connecting means connecting said control means to said lever; biasing means biasing said control means to its projecting position and, through said connecting means, biasing said lever bodily laterally of said side rail to a retracted position in which both arms are out of the path of load Movement; spring means connected to said stop arm and biasing said stop arm laterally of said side rail to a retracted position out of the path of load movement on said rollers toward said delivery point; said connecting means being operable, responsive to retraction of said control means by a load at said delivery point, to displace said lever bodily laterally of said side rail to project its braking arm into the path of load movement to brake a following load, with said stop arm retracted; said lever being pivoted, responsive to such braking, against the bias of said spring means, to project its stop arm into the path of load movement to arrest a following load at said holding point while a preceding load remains at said delivery point; said control means, upon removal of a load from said delivery point, being moved to its projecting position by said biasing means, and said lever being bodily displaced to its retracted position, by said connecting means, to release an arrested load for movement thereof to said delivery point.
Claim 2
Dependent Claim
442 words
In a roller trackway defining a path of load movement for movement of loads, which are substantially uniform in length, successively to a delivery point, and including a plurality of load-supporting rollers rotatably mounted in laterally spaced side rails, arresting means operable, responsive to arrival of a load at the delivery point, to arrest and retain an immediately following load at a holding point, spaced upstream from the delivery point by a distance in excess of the length of a load, until a load then at the delivery point has been removed from the trackway, said arresting means comprising, in combination, a twoarm swivel lever mounted, intermediate its ends, at said holding point adjacent a side rail for bodily displacement laterally of said side rail and pivotal movement relative to said side rail; said lever having a first arm, extending in the direction of travel of the loads and constituting a braking arm, and a second arm, extending in the opposite direction and constituting a stop arm; control means movably mounted at said delivery point and normally projecting into the path of load movement into said delivery point, said control means being engaged and retracted by each load reaching said delivery point and held retracted by the load until the load is removed from the trackway; connecting means connecting said control means to said lever; biasing means biasing said control means to its projecting position and, through said connecting means, biasing said lever bodily laterally of said side rail to a retracted position in which both arms are out of the path of load Movement; spring means connected to said stop arm and biasing said stop arm laterally of said side rail to a retracted position out of the path of load movement on said rollers toward said delivery point; said connecting means being operable, responsive to retraction of said control means by a load at said delivery point, to displace said lever bodily laterally of said side rail to project its braking arm into the path of load movement to brake a following load, with said stop arm retracted; said lever being pivoted, responsive to such braking, against the bias of said spring means, to project its stop arm into the path of load movement to arrest a following load at said holding point while a preceding load remains at said delivery point; said control means, upon removal of a load from said delivery point, being moved to its projecting position by said biasing means, and said lever being bodily displaced to its retracted position, by said connecting means, to release an arrested load for movement thereof to said delivery point.
Claim 3
Dependent Claim
24 words
Arresting means, as claimed in claim 1, wherein there are a pair of said swivel levers, each pivotally mounted adjacent a respective side rail.
Claim 4
Dependent Claim
39 words
Arresting means, as claimed in claim 1, including a stationary bearing block associated with each lever; each lever having a pivot pin intermediate its ends journalled in the associated bearing block; said connecting means being connected to each pin.
Claim 5
Dependent Claim
47 words
Arresting means, as claimed in claim 3, in which each bearing block is formed with a relatively elongated slot extending laterally relative to the associated side rail; each pin being engaged in the slot of its associated bearing block; said connecting means being articulated to each pin.
Claim 6
Dependent Claim
47 words
Arresting means, as claimed in claim 4, in which said spring means includes a spring connected between the stop arms of the levers; and a respective limit stop engageable with each stop arm and limiting displacement of the stop arm under the bias of said biasing means.
Claim 7
Dependent Claim
48 words
Arresting means, as claimed in claim 1, in which said control means is a pivoted control lever; and time delay means operatively associated with said control lever and delaying return of said control lever to the projected position responsive to removal of a load from said delivery point.
Claim 8
Dependent Claim
47 words
Arresting means, as claimed in claim 1, in which said control means is a pivotally mounted control lever; and a weight connected to said control lever and biasing said control lever to return to its projected position responsive to removal of a load from said delivery point.
Claim 9
Dependent Claim
187 words
A roller trackway for moving a series of loads, such as material piled on pallets, successively to a delivery point, comprising a plurality of rollers arranged along a defined path over which the series of loads is adapted to be moved and having a delivery point adjacent one end; means rotatably supporting said rollers; and control means engageable with the first load moved to the delivery point and including a displaceable member movable by such engagement to stop the next load at a location spaced from the first load to prevent interference of the next load with the first load and to permit the first load to be removed easily from the delivery point; and time delay means connected to said lever and engageable therewith to hold said lever for a period of time after said lever is released by removal of a load positioned at the delivery point; said time delay means comprising a suction cup member engageable with a counter member, and adjustable valve means associated with said counter member for adjusting the time of engagement of said suction cup member with said counter member.
Claim 10
Dependent Claim
187 words
A roller trackway for moving a series of loads, such as material piled on pallets, successively to a delivery point, comprising a plurality of rollers arranged along a defined path over which the series of loads is adapted to be moved and having a delivery point adjacent one end; means rotatably supporting said rollers; and control means engageable with the first load moved to the delivery point and including a displaceable member movable by such engagement to stop the next load at a location spaced from the first load to prevent interference of the next load with the first load and to permit the first load to be removed easily from the delivery point; and time delay means connected to said lever and engageable therewith to hold said lever for a period of time after said lever is released by removal of a load positioned at the delivery point; said time delay means comprising a suction cup member engageable with a counter member, and adjustable valve means associated with said counter member for adjusting the time of engagement of said suction cup member with said counter member.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |