GB1565884A - Creation of Inventions and Patents with Artificial Intelligence

GB1565884A – Method of loading and unloading heavy objects from a vessel and an equipment for carrying said method into effect
– Google Patents

GB1565884A – Method of loading and unloading heavy objects from a vessel and an equipment for carrying said method into effect
– Google Patents
Method of loading and unloading heavy objects from a vessel and an equipment for carrying said method into effect

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Publication number
GB1565884A

GB1565884A
GB23986/77A
GB2398677A
GB1565884A
GB 1565884 A
GB1565884 A
GB 1565884A
GB 23986/77 A
GB23986/77 A
GB 23986/77A
GB 2398677 A
GB2398677 A
GB 2398677A
GB 1565884 A
GB1565884 A
GB 1565884A
Authority
GB
United Kingdom
Prior art keywords
lifting
vessel
girders
hold
cantilever
Prior art date
1976-06-11
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB23986/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

RESMASTSERVICE AB

Original Assignee
RESMASTSERVICE AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1976-06-11
Filing date
1977-06-08
Publication date
1980-04-23

1977-06-08
Application filed by RESMASTSERVICE AB
filed
Critical
RESMASTSERVICE AB

1980-04-23
Publication of GB1565884A
publication
Critical
patent/GB1565884A/en

Status
Expired
legal-status
Critical
Current

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Classifications

B—PERFORMING OPERATIONS; TRANSPORTING

B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT

B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING

B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers

B63B27/19—Other loading or unloading equipment involving an intermittent action, not provided in groups B63B27/04 – B63B27/18

Description

PATENT SPECIFICATION
Application No 23986/77 ( 22) Filed 8 June 1977 Convention Application No 7606685 Filed 11 June 1976 in Sweden (SE) Complete Specification published 23 April 1980
INT CL 3 B 65 G 65/30 ( 52) Index at acceptance B 8 E Il A B 8 L 23 24 B ( 72) Inventor BENGT VALFRID ANDERSSON ( 54) A METHOD OF LOADING AND UNLOADING HEAVY OBJECTS FROM A VESSEL AND AN EQUIPMENT FOR CARRYING SAID METHOD INTO EFFECT ( 71) We, AB RESMASTSERVICE, a Swedish Body Corporate, of Mariestadsvagen 87, S-541 00 Sk 6 vde, Sweden, do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:-
The present invention relates to a method of and equipment for loading or unloading a vessel with heavy objects.
The transport of heavy objects on a vessel has hitherto been done by means of three different types of vessels or methods of loading and unloading, that is so-called -roll-on and roll-off” vessels, vessels having their own crane equipment for loading and unloading heavy objects, as well as loading and unloading the vessel by means of harbour cranes or pontoon cranes All these methods have serious disadvantages Roll and roll-off vessels require specially designed harbour installations both at the loading locality and at the unloading locality, which limits the use of such vessels to fixed routes Vessels provided with a crane equipment for handling heavy objects are very expensive, since the necessary crane equipment must be adapted to the heavy loads Vessels constructed and equipped for the handling of heavy objects are also very few, so that the waiting time for a desired transport can be very long The loading and unloading by means of harbour cranes or pontoons can only be accomplished in well-equipped harbours having cranes heavy enough, or at places close to such harbours where a pontoon crane can be sent.
Transport of heavy objects by means of vessels, thus, suffers from the disadvantages that said transport either must be made between definite, well-equipped harbours, which results in an extension of time and increase of the costs for the overland transports to and from said harbours, or that special vessels must be used which are very costly and difficult to acquire.
The object of the present invention is to remove the above-mentioned disadvantages by the transport of heavy objects on vessels, and the invention relates to a method of loading heavy objects on a vessel of substantially conventional type for piece goods and to unload said objects from said vessel The equipment used during loading and unloading can be stowed on the vessel, and can be erected at the load or unload harbour by the aid of the ordinary crane equipment of the vessel The load and unload equipment may of course also form a part of the harbour, and since it is comparatively simple and light, it does not require any especially great or expensive extensions or reinforcements of a normal harbour By using the method of the invention it is therefore possible, by means of a vessel for piece goods of comparatively normal type, to transport heavy objects between harbours or places which are not designed for loading and unloading of heavy objects.
In accordance with the present invention, there is provided a method of loading or unloading a vessel with heavy objects, in which for loading an object to be loaded is vertically lifted by means of a crab or other lifting means from, for instance, a vehicle drivable along a quay, the crab or other lifting means with the object is thereafter displaced horizontally from the lifting position to a position above the hold of the vessel along girders which are arranged on the quay and preferably in a cantilever manner extend out over the edge of the quay substantially up to the adjacent edge of the hold, and over to and along horizontal extensions of said girders, said extensions bridging the hold and being supported by ( 21) ( 31) ( 32) ( 33) ( 44) ( 51) ( 11) 1 565 884 ( 19 2 1565884 2 the vessel, whereupon the object is lowered into the hold.
In accordance with the present invention, there is also provided equipment for carrying the above method into effect, which equipment comprises the following means:
a) at least one support mast erectable on the quay opposite the hold of a vessel moored at said quay; b) a lifting yoke arranged for vertical movement along said support mast; c) a pair of girders mountable with one of their ends on said lifting yoke so that said girders in a cantilever manner extend from said support mast and out to the adjacent side of said moored vessel, d) a number of lifting masts pairwise erectable in a vertical position adjacent each side wall of the hold of said vessel; e) a horizontal support beam arranged between each lifting mast of the pair of lifting masts for vertical displacement upwards and downwards in said hold, said support beams thereby maintaining its horizontal extension, f) a pair of girder sections mounted to said support beams for vertical displacement therewith into and out of alignment with said cantilever girders to form extensions thereof; g) said cantilever girders having plane horizontal top surfaces forming a runway for a crab for lifting a heavy object to be loaded and unloaded, said crab being movable along said runway and from the same over to plane horizontal top surfaces of said girder sections, when the same are displaced into alignment with said plane horizontal top surfaces of said cantilever girders.
Embodiments of the method and equipment in accordance with the invention will now be described in detail below by way of example only, with reference to the attached schematical drawing, which in elevation shows said embodiment of equipment in three different working positions together with a vessel in crosssection.
The figure shows a vessel 1 of conventional type for transport of piece goods, said vessel being moored at a quay 2.
In the figure the vessel is shown in crosssection through one of the holds 3 thereof.
At a distance inside the edge 2 ‘ of the quay 2 a pair of support masts 4 are arranged longitudinally beside each other opposite the opening to to the hold 3 Each support mast 4 is rigidly anchored on the quay 2 and is provided with a lifting yoke or similar device which is displaceable upwards and downwards along said masts by the aid of suitable lifting means The lifting yokes of the two masts 4 are interconnected by means of horizontal support beams which thus can be moved upwards and downwards between said masts 4 while retaining a horizontal position when said lifting yokes are displaced by said lifting means At one of their ends a pair of rigid girders 5 having plane horizontal top surfaces are rigidly connected to said horizontal support beams between the masts 4 Said girders 5 extend in a cantilever manner towards and beyond the quay edge 2 ‘ and in over the adjacent vessel side 1 ‘ up to the wall 3 ‘ of the hold 3 The cantilever girders 5 are arranged mutually parallel and their plane horizontal top surfaces 6 form a runway for a crab 7, a gantry crane or the like which by means of roller or wheel sets 7 ‘ is movable in both directions along the said girders 5 The free ends of the girders 5 are preferably supported at the vessel side 1 ‘ in a manner to be described below.
A pair of horizontal girder sections 9 having plane top surfaces 10 are so arranged that they bridge the opening to the hold 3.
The girder sections 9 are supported in horizontal positions by means of horizontal support beams 11 which are arranged along the opposite side wall 3 ‘ and 3 “, respectively, of the hold 3 and can be lifted and lowered along said side walls while maintaining their horizontal position For this purpose the ends of the horizontal support beams 11 are supported by lifting devices which are attached to the ship’s hull In the embodiment shown said lifting devices comprise four lifting masts 12 which are arranged in pairs at the opposite side walls 3 ‘, 3 ” of the hold 3 and rest on the floor plate of said hold By means of said four lifting devices or lifting masts 12 the horizontal support beams 11 and thus the girder sections 9, which together form a load platform, can be displaced upwards and downwards in the hold 3, said load platform thereby entirely being supported by the vessel It is therefore possible to lift said load platform so that said girder sections 9 form extensions of the cantilever girders 5 and the plane top surfaces 6 and 10 of said girders 5 and 9, respectively, are aligned with each other so that said crab 7 may be rolled along the plane top surfaces 6 of said cantilever girders 5 over to the plane top surfaces 10 of said girder sections 9 The ends of said girders 5 and 9, facing each other, may in this position be rigidly interconnected, for instance by means of retractable locking pegs 14 or the like Said locking pegs 14 need not be dimensioned to withstand any great loads, since they mainly are intended to ascertain the alignment between said plane top surfaces 6 and 10.
The crab 7, mentioned above, comprises two side frames 15, 16 which are rigidly 1,565,884 2.
3 1,565884 3 interconnected by means of a number of cross bars 17 or the like Each of said two side frames 15, 16 comprises two vertical beams, situated at opposite end edges, between which a lifting yoke or beam 18 is vertically movable The roller or wheel sets 7 ‘, previously mentioned, are preferably provided at the lower ends of said vertical beams The lifting yokes or beams 18 of said frames 15, 16 are interconnected by means of two transverse lifting girders 19 over which flexible, depending links, straps, wires or the like 20 are attachable to the object 21 to be lifted When a vessel by means of the method and the equipment according to the invention is to be loaded with heavy objects, the support masts 4 are first mounted in a suitable position on the quay 2, whereafter the lifting yokes of said masts 4 are interconnected by means of the horizontal beams on which said cantilever girders 5 are mounted in a horizontal position At the same time the lifting masts 12, which preferably extend up over the deck of the vessel substantially to the same height as the support masts 4 and their horizontal support beams 11, are erected and mounted in the hold 3 The portions of said lifting masts 12, situated within the hold 3, and the support beams 11 may eventually be permanently arranged in the hold 3, in which case the lifting masts 12 are extended up over the deck by means of further portions which are connected to the top ends of the permanent portions in the hold.
Finally the girder sections 9, which form extensions of said cantilever girders 5, are fastened to said horizontal support beams 11, whereafter the crab 7 is placed on the cantilever girders 5 so that it can be moved along said cantilever girders 5 out onto said girder sections 9, forming extensions thereof, when the same are positioned in alignment with the cantilever girders 5 The above-described mounting work can be undertaken with the aid of the crane equipment of the vessel and members of the inventive equipment, which can be stowed on the vessel, are in a known manner so constructed that they rapidly can be joined.
During the loading, an object 21 to be loaded is advanced, for instance on a trailer, into a position beneath the inner end portions of the cantilever girders 5 adjacent the support masts 4 arranged on the quay 2, whereafter the crab 7 is moved along said cantilever girders 5 into a position centrally over the object 21 Should the top surface of said object 21 during said advancement be positioned above the bottom edge of the cantilever girders 5, said girders 5 are lifted along the support masts 4 until said object 21 can be advanced (this position is shown in broken lines at the right-hand end of the figure), and the cantilever girders 5 may then be lowered to straddle said objects (this position is shown in full lines).
The object 21 is thereafter coupled to the lifting beams 18 of the crab 7 by means of the links or straps 20 and is lifted from the trailer by means of said lifting beams 18 to such a height that the bottom edge of the object 21 can freely pass over the rail of the vessel With the object 21 in this lifting position, the crab 7 is moved outwardly along said cantilever girders 5, whose free ends preferably rest on the adjacent side edge of the vessel or on the adjacent support beam 11 The free ends 8 of the cantilever girders 5 are connected to the adjacent ends of the girder sections 9 by means of the locking pegs 14 The plane top surfaces 10 of the girder sections 9 are thereby aligned with the plane top surfaces 6 of the cantilever girders 5, and said girder sections 9 are held in this position by means of the horizontal support beams 11 being moved along the lifting masts 12 into alignment with said cantilever girders 5.
From the cantilever girders 5 the crab 7 is moved over to said girder sections 9 and into a suitable position on the same From this position the object 21 is to be lowered down into the hold 3 to rest on the floor thereof or on an already loaded object If the distance between the base surface of the object 21 and the surface on which said object shall rest is small, the lowering can be performed entirely by means of the lifting beams 18 of the crab 7 Should said distance be greater, the locking pegs 14 are removed whereafter the lifting platform, provided by said girder sections 9 and said horizontal support beams 11, is lowered into the hold 3 together with the crab 7 and the object 21 by lowering said load platform along the lifting masts 12 by means of the lifting devices arranged thereon (this position is shown in broken lines to the left of the figure) The load platform 9, 11 may be lowered so far down into the hold 3 that the object 21 rests on the hold floor, or the last portion of the lowering movement may be performed by means of the lifting means of the crab 7.
When the lift links 20 have been released from the object 21, the load platform 9,11 is returned to the position with the surfaces 6,10 in mutual alignment, whereafter saidcrab 7 is moved towards the support masts 4 to collect a new object 21, the locking pegs 14 being inserted before to ascertain the alignment of said surfaces.
The unloading of the vessel is obviously done in the opposite order When the loading or unloading is completed, the equipment may be demounted and stowed on the vessel 1 for renewed mounting at the next port of call.
By means of the method and the equipment according to the invention, a 1,565,884 great number of advantages are obtained.
Thus the necessary equipment is comparatively cheap and is always available, since it is carried onboard the vessel The equipment may be mounted in most harbours, since it only requires a suitable mounting site for the support masts 4.
Since the free ends of the cantilever girders 5 preferably rest on the side edge of +he vessel or on the support beams 11 and said girders are adjustable heightwise at the opposite ends, the level of said girders 5 may easily be adapted to variations of the draught of the vessel during loading and unloading, and also to variations of the water level, for instance caused by the tide.
Any longer stoppages to adjust the equipment for different conditions during loading or unloading are thus not necessary, since said adjustment can be continuously performed by actuation of the different lifting means.
The aforesaid should indicate that the cantilever girders 5, which are rigidly supported at the inner ends where the main part of the load is taken up and only rest relatively lightly on the vessel at the opposite ends, form a loading bridge which is completely supported on the shore and may easily be adjusted to a suitable level.
The load platform, consisting of the girder sections 9 and the support beams 11, however, is mainly or completely supported by the vessel so that the load, when it is lowered into the hold, is totally independent of the shore The locking pegs 14 are only intended to form means for ascertaining the alignment between the girder surfaces 6 and 10, and said pegs do not have any supporting function.
The lifting devices of the equipment may be of many different designs, for instance in the form of hydraulic jack means, wire or chain winches or the like The device for stepwise lifting of heavy loads according to U.S specification 3,881,687 has shown itself very suitable in the masts 4 and 12 as well as in the crab 7.

Claims (1)

WHAT WE CLAIM IS:
1 A method of loading or unloading a vessel with heavy objects, in which for loading an object is vertically lifted, for instance from a vehicle drivable on a quay by means of a crab, or other lifting means said crab or other lifting means together with said object is moved horizontally from the lifting position to a position above the hold of the vessel along girders being arranged on the quay and extending in a cantilever manner out beyond the edge of said quay substantially up to the adjacent edge of the hold, and further along horizontal extensions of said cantilever girders, said extension bridging the hold and being supported by the vessel, whereupon said object is lowered into the hold.
2 A method as claimed in claim I, by which said object is lowered into said hold by means of said crab or other lifting means, and/or by lowering the extensions of said cantilever girders, supported by the vessel, together with said crab or other lifting means and said object into the hold while maintaining said extensions in a horizontal position.
3 A method as claimed in claim 1 or 2, by which said extensions of said cantilever girders rest on and are lowered into and lifted from the hold by means of horizontal support beams which are displaceable in a vertical direction and arranged at opposite sides of the hold.
4 A method as claimed in any one of the preceding claims, by which the ends of said horizontal support beams are supported by vertical lifting masts and are vertically displaced along the same when lowering and lifting said extensions of said cantilever girders.
A method as claimed in any one of the preceding claims, by which said cantilever girders, while maintaining their horizontal position, are lifted upwards from and lowered downwards towards said quay, respectively, for instance in order to adapt the level thereof to varying draught of the vessel during the loading and unloading thereof.
6 A method as claimed in claim 5, by which said cantilever girders are supported by a lift yoke which, when necessary, is vertically displaceable along at least one support mast which rests on said quay.
7 A method as claimed in any one of the preceding claims, by which said cantilever girders and the extensions thereof, at their ends facing each other, can be interconnected after said cantilever girders and said extensions have been horizontally aligned.
8 A method as claimed in any one of the preceding claims, by which at least a portion of the lifting and lowering motion of said object is performed by means of a lifting device arranged in said crab.
9 A method as claimed in any one of the preceding claims, by which the equipment necessary for the loading and unloading can be demounted and stowed onboard the vessel for transport to the ports of call.
An equipment for carrying the method of any preceding claim into effect, which equipment comprises the following means:
a) at least one support mast, erectable on shore opposite the hold of a vessel moored at said shore; 4 1,565,884 1,565,884 b) a lifting yoke arranged for vertical movement along said support mast; c) a pair of girders, mountable at one of their ends on said lifting yoke, so that said girders in a cantilever manner extend from said support mast out to the adjacent side of said moored vessel; d) a number of lifting masts, pairwise erectable in a vertical position adjacent each side wall of the hold of said vessel, e) a horizontal support beam, arranged between the lifting masts of each pair of lifting masts for vertical displacement upwards and downwards in said hold, said support beam thereby maintaining its horizontal extension; f) a pair of girder sections, mountable on said support beams for vertical displacement therewith into and out of alignment with said cantilever girders to form extensions thereof; g) said cantilever girders having plane horizontal top surfaces forming a runway for a crab for lifting heavy objects to be loaded and unloaded, said crab being movable along said runway and from the same over to plane horizontal top surfaces of said girder sections, when the same are displaced into alignment with said plane horizontal top surfaces of said cantilever girders.
11 A method of loading or unloading a vessel with heavy objects, substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
12 An equipment for carrying the said inventive method into effect, substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
A A THORNTON & CO.
Chartered Patent Agents Northumberland House 303/306 High Holborn London WC 1 V 7 LE.
Printed for Her Majesty’s Stationery Office, by the Courier Press Leamington Spa 1980 Published by The Patent Office, 25 Southampton Buildings London WC 2 A l AY from which copies may be obtained.

GB23986/77A
1976-06-11
1977-06-08
Method of loading and unloading heavy objects from a vessel and an equipment for carrying said method into effect

Expired

GB1565884A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

SE7606685A

SE419325B
(en)

1976-06-11
1976-06-11

SET TO LOAD AND LOAD HEAVY COLLIN ON SHIPS AND DEVICE IMPLEMENTATION

Publications (1)

Publication Number
Publication Date

GB1565884A
true

GB1565884A
(en)

1980-04-23

Family
ID=20328207
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB23986/77A
Expired

GB1565884A
(en)

1976-06-11
1977-06-08
Method of loading and unloading heavy objects from a vessel and an equipment for carrying said method into effect

Country Status (18)

Country
Link

US
(1)

US4175908A
(en)

JP
(1)

JPS5320258A
(en)

AU
(1)

AU509055B2
(en)

BE
(1)

BE855428A
(en)

CA
(1)

CA1067446A
(en)

DD
(1)

DD130469A5
(en)

DE
(1)

DE2726407A1
(en)

DK
(1)

DK256377A
(en)

FI
(1)

FI771789A
(en)

FR
(1)

FR2354237A1
(en)

GB
(1)

GB1565884A
(en)

IT
(1)

IT1117112B
(en)

NL
(1)

NL7706487A
(en)

NO
(1)

NO772043L
(en)

PL
(1)

PL198766A1
(en)

SE
(1)

SE419325B
(en)

SU
(1)

SU837317A3
(en)

ZA
(1)

ZA773400B
(en)

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CN108713609A
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2018-04-27
2018-10-30
尹圣文
A kind of tea processing string bag transfer transportation device

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Bretagne Atel Chantiers

METHOD FOR CONSTRUCTING AND FITTING A NUCLEAR PROPELLED VESSEL AND DEVICE FOR CARRYING OUT SAID METHOD

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Work boat for installing large offshore structures

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DEVICE FOR LOADING AND UNLOADING CONTAINERS ON SHIPS

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1989-01-30
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Seatrans Ans

LOAD TRANSMISSION SYSTEM FOR SHIPPING AND UNLOADING.

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Etat Francais Delegue Darmement

CONVERTIBLE SUBMARINE WITH RESISTANT HULL.

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Elevating stern platform for swath vessels

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神鋼鋼線工業株式会社

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タックスインジェニュールゲゼルシャフトエムベーハー

Luggage loading crane

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1997-04-29
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France Etat

HANDLING MEANS FOR CONTAINER SHIP

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2008-05-16
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游勇
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2009-07-13
2011-01-20
Spedition Kübler GmbH

Heavy loading system

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2009-11-05
2020-09-03
August Alborn Gmbh & Co. Kg

Device for moving heavy loads from a watercraft to land or vice versa

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2012-10-16
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Wartsila Netherlands B.V.
Method of handling a unit in a marine vessel and an assembly in a marine vessel

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1976

1976-06-11
SE
SE7606685A
patent/SE419325B/en
unknown

1977

1977-06-06
FI
FI771789A
patent/FI771789A/fi
not_active
Application Discontinuation

1977-06-06
ZA
ZA00773400A
patent/ZA773400B/en
unknown

1977-06-06
BE
BE178229A
patent/BE855428A/en
unknown

1977-06-07
FR
FR7717410A
patent/FR2354237A1/en
not_active
Withdrawn

1977-06-08
GB
GB23986/77A
patent/GB1565884A/en
not_active
Expired

1977-06-08
IT
IT68318/77A
patent/IT1117112B/en
active

1977-06-09
AU
AU25999/77A
patent/AU509055B2/en
not_active
Expired

1977-06-09
US
US05/805,211
patent/US4175908A/en
not_active
Expired – Lifetime

1977-06-09
DK
DK256377A
patent/DK256377A/en
unknown

1977-06-09
DE
DE19772726407
patent/DE2726407A1/en
not_active
Withdrawn

1977-06-10
DD
DD7700199437A
patent/DD130469A5/en
unknown

1977-06-10
CA
CA280,261A
patent/CA1067446A/en
not_active
Expired

1977-06-10
NO
NO772043A
patent/NO772043L/en
unknown

1977-06-10
SU
SU772496752A
patent/SU837317A3/en
active

1977-06-10
PL
PL19876677A
patent/PL198766A1/en
unknown

1977-06-10
JP
JP6876977A
patent/JPS5320258A/en
active
Pending

1977-06-13
NL
NL7706487A
patent/NL7706487A/en
not_active
Application Discontinuation

Cited By (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

CN108713609A
(en)

2018-04-27
2018-10-30
尹圣文
A kind of tea processing string bag transfer transportation device

CN108713609B
(en)

2018-04-27
2021-10-01
尹圣文
Net bag transferring and transporting device for tea processing

Also Published As

Publication number
Publication date

US4175908A
(en)

1979-11-27

CA1067446A
(en)

1979-12-04

SU837317A3
(en)

1981-06-07

NL7706487A
(en)

1977-12-13

SE419325B
(en)

1981-07-27

AU509055B2
(en)

1980-04-17

NO772043L
(en)

1977-12-13

FR2354237A1
(en)

1978-01-06

ZA773400B
(en)

1978-04-26

DE2726407A1
(en)

1977-12-22

BE855428A
(en)

1977-12-06

FI771789A
(en)

1977-12-12

SE7606685L
(en)

1977-12-12

PL198766A1
(en)

1978-02-27

JPS5320258A
(en)

1978-02-24

IT1117112B
(en)

1986-02-10

DK256377A
(en)

1977-12-12

AU2599977A
(en)

1978-12-14

DD130469A5
(en)

1978-04-05

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