US3884613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming and displacing a prefabricated building section
Assignee: Individual
•
Filing: 1972-03-24
•
Granted: 1975-05-20
•
Expires: 1992-03-24
Abstract
Abstract The invention relates to a device for the manufacture of a prefabricated element intended to form at least part of a building. The device comprises at least two relatively movable jigs, which can be relatively fixed so that a mold can be formed in which a building element can be made to include at least two walls at an angle to each other, or a wall and a floor and/or an upper side of a section so that the element bounds at least part of the space of the building. At least one of the jigs is displaceable as a whole and coupled with driving members that displace the jig with respect to the other jig in two relatively opposite directions so that the parts can be moved away from each other or for moving the jigs in their relative manufacturing positions.
Inventors
- 👤 Der Lely Cornelis Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/348; E04B1/34815; E04B1/34861; B; B28; B28B; B28B7/00; B28B7/22; E04B1/34823; E04B2001/34876
Claims Analysis
Total Claims: 44
Claim 1
Independent Claim
137 words
A device for molding a prefabricated section configured to form and enclose a part of a building, said device comprising jig means to form a mold in which said section is cast, said jig means having displaceable outer side jigs and at least one displaceable inner jig whereby said section is releasable from said jig means, supporting structure provided for said inner jig adapted to move said inner jig in a first horizontal direction, displacement means to displace said outer side jigs also in said first direction, said jig means including a supporting member at the lower side to support the said section, said device including a conveyor to displace in a horizontal direction substantially perpendicular to said first mentioned direction said section over the supporting member and out of the mold defined by said jig means.
Claim 2
Independent Claim
137 words
A device for molding a prefabricated section configured to form and enclose a part of a building, said device comprising jig means to form a mold in which said section is cast, said jig means having displaceable outer side jigs and at least one displaceable inner jig whereby said section is releasable from said jig means, supporting structure provided for said inner jig adapted to move said inner jig in a first horizontal direction, displacement means to displace said outer side jigs also in said first direction, said jig means including a supporting member at the lower side to support the said section, said device including a conveyor to displace in a horizontal direction substantially perpendicular to said first mentioned direction said section over the supporting member and out of the mold defined by said jig means.
Claim 3
Dependent Claim
31 words
A device as claimed in claim 1, wherein a conveyor path joins the supporting member whereby said section is displaceable from said supporting member on said conveyor path by said conveyor.
Claim 4
Dependent Claim
44 words
A device as claimed in claim 2, wherein said supporting member and said conveyor path include each at least one supporting beam, whereby an end of the supporting beam of the supporting member joins an end of the supporting beam of the conveyor path.
Claim 5
Independent Claim
174 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, vertical walls and an upper side, said device comprising jig means which forms a mold in which said section is cast, said jig means having a plurality of inner and outer jigs to form said bottom side, walls and upper side of each said section, each said jig being displaceable, at least one outer jiG for a wall and an inner jig of said jigs being displaceable as a whole in a direction transverse to said sections length over a distance at least equal to one said sections width whereby said molded section is releasable from the device, said device including supporting members defining a path extending parallel to the longer sides of said section whereby said section is displaceable out of the mold enclosed by said jigs means over the said path.
Claim 6
Independent Claim
174 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, vertical walls and an upper side, said device comprising jig means which forms a mold in which said section is cast, said jig means having a plurality of inner and outer jigs to form said bottom side, walls and upper side of each said section, each said jig being displaceable, at least one outer jiG for a wall and an inner jig of said jigs being displaceable as a whole in a direction transverse to said sections length over a distance at least equal to one said sections width whereby said molded section is releasable from the device, said device including supporting members defining a path extending parallel to the longer sides of said section whereby said section is displaceable out of the mold enclosed by said jigs means over the said path.
Claim 7
Dependent Claim
46 words
A device as claimed in claim 4, wherein said supporting members coextend with the conveyor path over a distance beyond said jig means, said distance being at least as great as the distance over which said jig means extends in the direction of said supporting member.
Claim 8
Dependent Claim
32 words
A device as claimed in claim 5, wherein said conveyor path is associated with a delivery mechanism having coupling members which can be fastened to an element provided in said jig means.
Claim 9
Dependent Claim
48 words
A device as claimed in claim 6, wherein said delivery mechanism comprises an endless conveyor member connected with a prime mover, a draw member being connectable to said conveyor member at one or more settings, said draw member having coupling means for connecting the same at said settings.
Claim 10
Dependent Claim
30 words
A device as claimed in claim 7, wherein said coupling means includes a beam which extends vertically along the section being molded to be positioned on the top side thereof.
Claim 11
Dependent Claim
22 words
A device as claimed in claim 8, wherein said beam has its upper side fastened to a roof beam of said section.
Claim 12
Dependent Claim
141 words
A factory for manufacturing prefabricated concrete sections for forming at least part of a building, said factory comprising a device for the molding of said sections which has relatively movable jigs within which each of said sections are cast, said jigs including bottom jigs which are displaceable vertically and include means to form ribs in the bottom of each said section and outer and inner jigs with means for displacing same in a first direction horizontally by a distance greater than the width of each said section cast therein, reinforcement rods for the concrete sections being positioned to one side of said device, a conveyor being located on the other side of said device whereby a conveyor path is formed along which cast concrete sections are moved out of said device in a second direction substantially perpendicular to said first direction.
Claim 13
Dependent Claim
141 words
A factory for manufacturing prefabricated concrete sections for forming at least part of a building, said factory comprising a device for the molding of said sections which has relatively movable jigs within which each of said sections are cast, said jigs including bottom jigs which are displaceable vertically and include means to form ribs in the bottom of each said section and outer and inner jigs with means for displacing same in a first direction horizontally by a distance greater than the width of each said section cast therein, reinforcement rods for the concrete sections being positioned to one side of said device, a conveyor being located on the other side of said device whereby a conveyor path is formed along which cast concrete sections are moved out of said device in a second direction substantially perpendicular to said first direction.
Claim 14
Dependent Claim
21 words
A factory as claimed in claim 10, wherein said factory comprises a curing and finishing workshop communicating with said conveyor path.
Claim 15
Dependent Claim
29 words
A factory as claimed in claim 11, wherein as least one control member is arranged along said conveyor path for actuating a delivery mechanism located near said conveyor path.
Claim 16
Dependent Claim
25 words
A factory as claimed in claim 12, wherein a concrete mixing system is located adjacent said device and a delivery member leads to said device.
Claim 17
Dependent Claim
136 words
A factory for manufacturing prefabricated sections for forming at least part of a building, said factory comprising a device for molding of said sections having a bottom side, a wall and an upper side, said device comprising jig means which encloses a mold and includes relatively moveable jigs within which each of said sections including said bottom side, said wall and said upperside are cast, supporting members for said section mounted in said device adjacent a bottom jig which is included in said jig means, said supporting members extending out of the device and defining a path along which each said section is displaced out of the mold enclosed by said jig means to a curing and finishing workshop in said factory, said workshop communicating with the part of the path extending out of said device.
Claim 18
Dependent Claim
136 words
A factory for manufacturing prefabricated sections for forming at least part of a building, said factory comprising a device for molding of said sections having a bottom side, a wall and an upper side, said device comprising jig means which encloses a mold and includes relatively moveable jigs within which each of said sections including said bottom side, said wall and said upperside are cast, supporting members for said section mounted in said device adjacent a bottom jig which is included in said jig means, said supporting members extending out of the device and defining a path along which each said section is displaced out of the mold enclosed by said jig means to a curing and finishing workshop in said factory, said workshop communicating with the part of the path extending out of said device.
Claim 19
Dependent Claim
36 words
A factory as claimed in claim 14, wherein said factory comprises a set of devices for molding said sections, said devices and their respective said conveyor paths being located parallel to one another in said factory.
Claim 20
Dependent Claim
63 words
A factory as claimed in claim 15, wherein supply means by which cast material for the section can be fed to the mold defined withiN said jigs is situated over said set of devices, said supply means being joined to a system for making the cast material, said system being located in said factory at one side of the set of said devices.
Claim 21
Dependent Claim
51 words
A factory as claimed in claim 15, wherein said sections have longer and shorter sides, in plan view, said conveyor paths joining said devices at the shorter sides of said sections and extending parallel to the longer sides over a distance which is longer than the length of each said section.
Claim 22
Independent Claim
133 words
A device for molding a prefabricated section configured to form and enclose a part of a building, said device comprising jig means which form a mold in which said section is cast, said jig means having displaceable outer jigs including a bottom jig and at least two side jigs adapted to cast walls of the section and at least one displaceable inner jig whereby said molded section is horizontally releasable from the jig means, said inner jib including means for cooperating with said bottom jig to form the bottom of said section, said device including a conveyor with which said section can be displaced out of the mold enclosed by said jig means in a direction which is substantially perpendicular to the direction of displacement of said inner jig and said side jigs.
Claim 23
Independent Claim
133 words
A device for molding a prefabricated section configured to form and enclose a part of a building, said device comprising jig means which form a mold in which said section is cast, said jig means having displaceable outer jigs including a bottom jig and at least two side jigs adapted to cast walls of the section and at least one displaceable inner jig whereby said molded section is horizontally releasable from the jig means, said inner jib including means for cooperating with said bottom jig to form the bottom of said section, said device including a conveyor with which said section can be displaced out of the mold enclosed by said jig means in a direction which is substantially perpendicular to the direction of displacement of said inner jig and said side jigs.
Claim 24
Dependent Claim
36 words
A device as claimed in claim 18, wherein said section has, in horizontal plan view, longer and shorter sides, said conveyor defining a path extending at least substantially parallel to said longer sides of said section.
Claim 25
Independent Claim
161 words
A device for molding a prefabricated section configured to form and enclose a part of a building, said device comprising jig means which form a mold in which said section is cast, said jig means having displaceable jigs including outer jigs and at least one inner jig, said jigs adapted to form a floor and at least two vertical walls of the sections, displacement means for said outer jigs and supporting structure for horizontally displacing said inner jig as a whole whereby said inner jig is releasable out of the molded section and said molded section is releasable from the jig means, said device including a conveyor which defines a path extending transversely to the direction of displacement of said inner jig and at least one outer jig supporting members mounted in said device adjacent said displaceable jigs whereby the section can be displaced out of the mold enclosed by said jig means over the conveyor path from said jig means.
Claim 26
Independent Claim
161 words
A device for molding a prefabricated section configured to form and enclose a part of a building, said device comprising jig means which form a mold in which said section is cast, said jig means having displaceable jigs including outer jigs and at least one inner jig, said jigs adapted to form a floor and at least two vertical walls of the sections, displacement means for said outer jigs and supporting structure for horizontally displacing said inner jig as a whole whereby said inner jig is releasable out of the molded section and said molded section is releasable from the jig means, said device including a conveyor which defines a path extending transversely to the direction of displacement of said inner jig and at least one outer jig supporting members mounted in said device adjacent said displaceable jigs whereby the section can be displaced out of the mold enclosed by said jig means over the conveyor path from said jig means.
Claim 27
Dependent Claim
158 words
A factory for manufacturing prefabricated concrete sections for forming at least part of a building, said factory comprising a device for the molding of said sections and having jig means for forming a mold which includes a plurality of displaceable inner and outer jigs which are adapted to mold a bottom side, at least two vertical walls and a top side of said section, there being at least one horizontally movable inner jig within which each of said sections is cast, said jig means including at least, two supporting beams to support at least partly the section molded in said jigs means, a conveyor being located on one side of said device and a conveyor path being formed by further supporting beams joining the first said supporting beams, said conveyor including a draw beam extending along one of said further supporting beams, said draw beam being coupled with driving means to convey said section along said supporting beams.
Claim 28
Dependent Claim
158 words
A factory for manufacturing prefabricated concrete sections for forming at least part of a building, said factory comprising a device for the molding of said sections and having jig means for forming a mold which includes a plurality of displaceable inner and outer jigs which are adapted to mold a bottom side, at least two vertical walls and a top side of said section, there being at least one horizontally movable inner jig within which each of said sections is cast, said jig means including at least, two supporting beams to support at least partly the section molded in said jigs means, a conveyor being located on one side of said device and a conveyor path being formed by further supporting beams joining the first said supporting beams, said conveyor including a draw beam extending along one of said further supporting beams, said draw beam being coupled with driving means to convey said section along said supporting beams.
Claim 29
Independent Claim
212 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, vertical walls disposed at a substantial angle relative to each other and an upper side, said device comprising jig means which form a mold enclosure in which said section is cast with the bottom and upper sides in horizontal positions and with said walls in vertical positions, said jig means having a plurality of jigs for casting said bottom and upper sides and said walls each of wHich is displaceable whereby said molded section is releasable from the device, at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of the section, said bottom jig being displaceable transverse to the direction in which the other of said jigs are displaceable, said device including supporting members defining a path below the bottom side of said section and parallel to and substantially below said ribs, whereby said section can be displaced out of the mold enclosed by said jig means over the supporting members.
Claim 30
Independent Claim
212 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, vertical walls disposed at a substantial angle relative to each other and an upper side, said device comprising jig means which form a mold enclosure in which said section is cast with the bottom and upper sides in horizontal positions and with said walls in vertical positions, said jig means having a plurality of jigs for casting said bottom and upper sides and said walls each of wHich is displaceable whereby said molded section is releasable from the device, at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of the section, said bottom jig being displaceable transverse to the direction in which the other of said jigs are displaceable, said device including supporting members defining a path below the bottom side of said section and parallel to and substantially below said ribs, whereby said section can be displaced out of the mold enclosed by said jig means over the supporting members.
Claim 31
Independent Claim
131 words
A device for molding a prefabricated section of a building in which said section encloses at least part of the space of the building, said device including an inner jig and an outer side jig, means for displacing said inner jig and said outer side jig in the same direction horizontally by an amount at least equal to the width of said section for releasing the section molded in said device, a movable draw member mounted on said device asymmetrically beneath the section being molded with respect to the direction of drawing, said draw member being connected to a coupling member connected to said section whereby said section can be moved in a direction transverse to the direction of movement of said inner jig from the mold formed by said device.
Claim 32
Independent Claim
131 words
A device for molding a prefabricated section of a building in which said section encloses at least part of the space of the building, said device including an inner jig and an outer side jig, means for displacing said inner jig and said outer side jig in the same direction horizontally by an amount at least equal to the width of said section for releasing the section molded in said device, a movable draw member mounted on said device asymmetrically beneath the section being molded with respect to the direction of drawing, said draw member being connected to a coupling member connected to said section whereby said section can be moved in a direction transverse to the direction of movement of said inner jig from the mold formed by said device.
Claim 33
Independent Claim
215 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, at least two walls and an upper side, said device comprising jig means for forming a section in which said section is cast with said bottom side and said upper side in horizontal positions and said walls in vertical positions, said jig means having jigs each of which is displaceable whereby said molded section is releasable from the device, means for displacing at least two of said jig means defining both sides of one of said walls as a whole over a distance equal to at least its width dimensions and at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of the section, said device including supporting members in the lower part of the device, said supporting members extending out of the mold enclosed by said jigs and defining a path extending parallel to the longer sides of the section, whereby the section can be displaced out of the mold over said supporting members.
Claim 34
Independent Claim
215 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, at least two walls and an upper side, said device comprising jig means for forming a section in which said section is cast with said bottom side and said upper side in horizontal positions and said walls in vertical positions, said jig means having jigs each of which is displaceable whereby said molded section is releasable from the device, means for displacing at least two of said jig means defining both sides of one of said walls as a whole over a distance equal to at least its width dimensions and at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of the section, said device including supporting members in the lower part of the device, said supporting members extending out of the mold enclosed by said jigs and defining a path extending parallel to the longer sides of the section, whereby the section can be displaced out of the mold over said supporting members.
Claim 35
Independent Claim
191 words
A device for molding a prefabricated section forming at least part of a building, said section being configured to enclose a part of said building, said device comprising jig means forming a mold in which said section is cast, said jig means having a bottom jig on which a bottom for said section is cast, and an inner jig connected to a supporting structure, said supporting structure being situated outside said bottom jig in such a way that said inner jig is extending substantially horizontally out of said supporting structure over said bottom jig at a distance above the same so as to be able to cast said bottom below said inner jig, said jig means including displaceable wall jigs whereby at least two walls are cast between said inner jig and said wall jigs, at least one wall jig being extendable in the same direction as said inner jig, supporting members mounted in said device adjacent said bottom jig whereby said section is displaceable out of the mold enclosed by said jig means over said supporting members in a direction transverse to the direction of extension of said inner jig.
Claim 36
Independent Claim
191 words
A device for molding a prefabricated section forming at least part of a building, said section being configured to enclose a part of said building, said device comprising jig means forming a mold in which said section is cast, said jig means having a bottom jig on which a bottom for said section is cast, and an inner jig connected to a supporting structure, said supporting structure being situated outside said bottom jig in such a way that said inner jig is extending substantially horizontally out of said supporting structure over said bottom jig at a distance above the same so as to be able to cast said bottom below said inner jig, said jig means including displaceable wall jigs whereby at least two walls are cast between said inner jig and said wall jigs, at least one wall jig being extendable in the same direction as said inner jig, supporting members mounted in said device adjacent said bottom jig whereby said section is displaceable out of the mold enclosed by said jig means over said supporting members in a direction transverse to the direction of extension of said inner jig.
Claim 37
Independent Claim
201 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, at least two walls and an upper side, said device comprising jig means for forming a section in whiCh said section is cast with said bottom side and said upper side in horizontal positions, said jig means having jigs each of which is displaceable wherey said molded section is releasable from the device, means for displacing at least two of said jig means as a whole in a direction transverse to the longer sides of said section, at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of the section, said device including supporting members in the lower part of the device, said supporting members extending out of the mold enclosed by said jigs and defining a path extending parallel to the longer sides of the section, whereby the section can be displaced out of the mold over said supporting members.
Claim 38
Independent Claim
201 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, at least two walls and an upper side, said device comprising jig means for forming a section in whiCh said section is cast with said bottom side and said upper side in horizontal positions, said jig means having jigs each of which is displaceable wherey said molded section is releasable from the device, means for displacing at least two of said jig means as a whole in a direction transverse to the longer sides of said section, at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of the section, said device including supporting members in the lower part of the device, said supporting members extending out of the mold enclosed by said jigs and defining a path extending parallel to the longer sides of the section, whereby the section can be displaced out of the mold over said supporting members.
Claim 39
Independent Claim
195 words
A device for molding a prefabricated section forming at least part of a building, said section being configured to enclose a part of said building, said device comprising jig means forming a mold in which said section is cast, said jig means having a bottom jig on which a bottom for said section is cast, and an inner jig connected to a supporting structure, said supporting structure being situated outside said bottom jig in such a way that said inner jig is extending substantially horizontally out of said supporting structure over said bottom jig at a distance above the same so as to be able to cast said bottom below said inner jig, said jig means including displaceable wall jigs whereby at least two walls are cast between said inner jig and said wall jigs, supporting members mounted in said device adjacent said bottom jig whereby said section is bearing on said supporting members during and after displacing said inner and outer jigs out of the molding structure over a distance at least equal to at least the width of said section, said section being removable by said supporting members out of the molding structure.
Claim 40
Independent Claim
195 words
A device for molding a prefabricated section forming at least part of a building, said section being configured to enclose a part of said building, said device comprising jig means forming a mold in which said section is cast, said jig means having a bottom jig on which a bottom for said section is cast, and an inner jig connected to a supporting structure, said supporting structure being situated outside said bottom jig in such a way that said inner jig is extending substantially horizontally out of said supporting structure over said bottom jig at a distance above the same so as to be able to cast said bottom below said inner jig, said jig means including displaceable wall jigs whereby at least two walls are cast between said inner jig and said wall jigs, supporting members mounted in said device adjacent said bottom jig whereby said section is bearing on said supporting members during and after displacing said inner and outer jigs out of the molding structure over a distance at least equal to at least the width of said section, said section being removable by said supporting members out of the molding structure.
Claim 41
Independent Claim
215 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose part of said building whereby said section includes a bottom side, at least two spaced apart vertical walls and an upper side, said device comprising jig means which form a mold enclosure in which said section is cast with said bottom and upper sides in horizontal positions and with said vertical walls in positions perpendicular to said bottom and top sides, said jig means having a plurality of jigs for casting said bottom and upper sides and said vertical walls each of which is displaceable whereby said molded section is releasable from the device, at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer side of the section, said bottom jig being displaceable transverse to the direction in which the other of said jigs are displaceable, said device including supporting means defining a path below the bottom side of said section and parallel to and substantially below said ribs, whereby said section can be displaced out of the mold enclosed by said jig means over the supporting members.
Claim 42
Independent Claim
215 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose part of said building whereby said section includes a bottom side, at least two spaced apart vertical walls and an upper side, said device comprising jig means which form a mold enclosure in which said section is cast with said bottom and upper sides in horizontal positions and with said vertical walls in positions perpendicular to said bottom and top sides, said jig means having a plurality of jigs for casting said bottom and upper sides and said vertical walls each of which is displaceable whereby said molded section is releasable from the device, at least one of said jig means forming a bottom jig on which said bottom side is castable with ribs on its lower side parallel to the longer side of the section, said bottom jig being displaceable transverse to the direction in which the other of said jigs are displaceable, said device including supporting means defining a path below the bottom side of said section and parallel to and substantially below said ribs, whereby said section can be displaced out of the mold enclosed by said jig means over the supporting members.
Claim 43
Independent Claim
223 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, at least two walls, and an upper side, said device comprising a jig means for forming a section in which said section is cast with said bottom and upper sides in horizontal positions and with said walls in positions perpendicular to said bottom and upper sides, said jig means having jigs each of which is displaceable whereby said molded section is releasable from the device, means for displacing at least two of said jig means defining sides of both of said walls as a whole over a distance equal to at least the width dimension of the section and at least one of said jig means forming a boTtom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of said section, said device including supporting members in the lower part of the device, said supporting members extending out of the mold enclosed by said jigs and defining a path extending parallel to the longer sides of said section, whereby said section can be displaced out of the mold over said supporting members.
Claim 44
Independent Claim
223 words
A device for molding a prefabricated section forming at least part of a building and having, in plan view, longer and shorter sides, said section being configured to enclose a part of said building whereby said section includes a bottom side, at least two walls, and an upper side, said device comprising a jig means for forming a section in which said section is cast with said bottom and upper sides in horizontal positions and with said walls in positions perpendicular to said bottom and upper sides, said jig means having jigs each of which is displaceable whereby said molded section is releasable from the device, means for displacing at least two of said jig means defining sides of both of said walls as a whole over a distance equal to at least the width dimension of the section and at least one of said jig means forming a boTtom jig on which said bottom side is castable with ribs on its lower side parallel to the longer sides of said section, said device including supporting members in the lower part of the device, said supporting members extending out of the mold enclosed by said jigs and defining a path extending parallel to the longer sides of said section, whereby said section can be displaced out of the mold over said supporting members.
References Cited (Backward Citations)
US1983757A
Cited
US3609830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |