US3813127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the intermittent transferring of packaged refuse or laundry articles
Assignee: Svenska Flaktfabriken AB
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Filing: 1973-04-24
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Granted: 1974-05-28
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Expires: 1993-04-24
Abstract
Abstract A system for pneumatically transferring material such as refuse, laundry, etc. which includes a plurality of vertical chutes into which the material is deposited. Means is provided for collecting the material within the chute and periodically discharging the material from the chute. To this end, the lower end portion of the chute is formed as a valve cooperable with the main suction line, the end portion being vertically displaceable and having a beveled bottom end cooperating with a sloping wall forming an inlet into the main suction system. When the vertical chute is closed, the beveled end bears against the wall and retains the material within the chute. When the lower end portion is elevated, the material may discharge from the chute. To assist in the discharge of the material from the chute into the main suction channel, the inlet has a socket surrounding the end portion which is enlarged relative to the end portion of the chute so that when the chute bottom disengages the sloping wall, atmospheric air is permitted to flow into the inlet portion and assist the discharge of the material into the main suction duct. When the chute is closed by downward displacement of the bottom portion, a valving projection on the end portion operates to close the atmospheric opening into the inlet portion. The end portion of the chute is preferably operated periodically.
Inventors
- 👤 Feudis S De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
B; B65; B65G; B65G51/00; B65G51/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
313 words
Apparatus for the intermittent transferring of packaged articles, especially discrete, voluminous refuse and laundry articles from a plurality of substantially vertical branch ducts passing through the different storeys, with separate charging openings in each storey, in large appartment buildings or hospitals, to a substantially horizontal main channel, to which each of the vertical ducts conduct said articles by means of transporting air, said apparatus including between each duct and said channel a joint comprising partly a lower joint portion forming an acute angle with said horizontal main channel and an upper joint portion projecting substantially vertically upwards from the lower portion and enclosing the lower end of the respective substantially vertical branch duct carrying the articles to be pneumatically transported, and a valve member being arranged in said joint, the apparatus further including a common fan unit having its suction side connected to said horizontal channel by means of one or several separators to separate said pneumatically transported articles from the transporting air, characterized in that at least the upper, substantially vertical part of the joint is made of polygonal, preferably quadratic form and in that the valve member of each joint is liftable upwards and downwards and is of cylinder-shaped form with a beveled lower end corresponding to the acute inclination angle of the wall defining said lower portion of the joint and with a flanged upper end resting in its first, lowest position on the corresponding flanged top of said vertical part of the joint thus closing off the branch duct from the ambient air and from said main channel and in its second, gradually raised position sucking in the ambient air as at least a portion of the transporting air to the branch duct and gradually opening the free passage for said discrete articles between said branch duct and said main channel, thus emptying the respective, substantially vertical branch ducts.
Claim 2
Dependent Claim
313 words
Apparatus for the intermittent transferring of packaged articles, especially discrete, voluminous refuse and laundry articles from a plurality of substantially vertical branch ducts passing through the different storeys, with separate charging openings in each storey, in large appartment buildings or hospitals, to a substantially horizontal main channel, to which each of the vertical ducts conduct said articles by means of transporting air, said apparatus including between each duct and said channel a joint comprising partly a lower joint portion forming an acute angle with said horizontal main channel and an upper joint portion projecting substantially vertically upwards from the lower portion and enclosing the lower end of the respective substantially vertical branch duct carrying the articles to be pneumatically transported, and a valve member being arranged in said joint, the apparatus further including a common fan unit having its suction side connected to said horizontal channel by means of one or several separators to separate said pneumatically transported articles from the transporting air, characterized in that at least the upper, substantially vertical part of the joint is made of polygonal, preferably quadratic form and in that the valve member of each joint is liftable upwards and downwards and is of cylinder-shaped form with a beveled lower end corresponding to the acute inclination angle of the wall defining said lower portion of the joint and with a flanged upper end resting in its first, lowest position on the corresponding flanged top of said vertical part of the joint thus closing off the branch duct from the ambient air and from said main channel and in its second, gradually raised position sucking in the ambient air as at least a portion of the transporting air to the branch duct and gradually opening the free passage for said discrete articles between said branch duct and said main channel, thus emptying the respective, substantially vertical branch ducts.
Claim 3
Dependent Claim
231 words
In a pneumatic transport system comprising a main suction duct for transferring material, a plurality of inlets into said duct, and a like number of vertical chutes connecting with said inlet by mEans of a valve member at the bottom of said chute, said valve member in the open position of said chute permitting discharge of material from said chute into said inlet and said suction duct and also permitting inflow of atmospheric air into said suction duct through said inlet portion, said valve member in the closed position closing both access from said chute into said duct and access for atmospheric air into said suction duct through said inlet portion, the improvement wherein said valve member comprises a vertically displaceable pipe end portion connected to said chute, a tubular socket surrounding said pipe end portion with clearance and having an opening at the top to admit atmospheric air into the clearance space between said socket and said pipe end portion, the bottom of said end portion in its lower position engaging a wall of said inlet to close access between said chute and said suction duct, and in its upper position being spaced from said inlet wall to open said access, said displaceable end portion having means to close said socket opening in the lower position of said end portion and to open said socket opening in its upper position.
Claim 4
Dependent Claim
231 words
In a pneumatic transport system comprising a main suction duct for transferring material, a plurality of inlets into said duct, and a like number of vertical chutes connecting with said inlet by mEans of a valve member at the bottom of said chute, said valve member in the open position of said chute permitting discharge of material from said chute into said inlet and said suction duct and also permitting inflow of atmospheric air into said suction duct through said inlet portion, said valve member in the closed position closing both access from said chute into said duct and access for atmospheric air into said suction duct through said inlet portion, the improvement wherein said valve member comprises a vertically displaceable pipe end portion connected to said chute, a tubular socket surrounding said pipe end portion with clearance and having an opening at the top to admit atmospheric air into the clearance space between said socket and said pipe end portion, the bottom of said end portion in its lower position engaging a wall of said inlet to close access between said chute and said suction duct, and in its upper position being spaced from said inlet wall to open said access, said displaceable end portion having means to close said socket opening in the lower position of said end portion and to open said socket opening in its upper position.
Claim 5
Dependent Claim
14 words
An improvement according to claim 2 including means to periodically displace said end portion.
References Cited (Backward Citations)
US3316026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |