CN214983738U - Hoisting air cushion - Google Patents
Hoisting air cushion Download PDFInfo
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- CN214983738U CN214983738U CN202121442780.7U CN202121442780U CN214983738U CN 214983738 U CN214983738 U CN 214983738U CN 202121442780 U CN202121442780 U CN 202121442780U CN 214983738 U CN214983738 U CN 214983738U
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- patch
- woven fabric
- layer
- surface decoration
- vulcanizable
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- 239000002759 woven fabric Substances 0.000 claims abstract description 60
- 150000001875 compounds Chemical class 0.000 claims abstract description 42
- 239000000835 fiber Substances 0.000 claims abstract description 21
- 239000004744 fabric Substances 0.000 claims abstract description 9
- 238000005034 decoration Methods 0.000 claims description 34
- 239000002131 composite material Substances 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 18
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 229920004933 Terylene® Polymers 0.000 claims 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims 2
- 229920000728 polyester Polymers 0.000 claims 1
- 238000004073 vulcanization Methods 0.000 abstract description 20
- 238000002360 preparation method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 17
- 229920000297 Rayon Polymers 0.000 description 5
- 238000010030 laminating Methods 0.000 description 5
- 239000002964 rayon Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model discloses a jack-up air cushion, but including double-deck inner bag, upside vulcanization finish coat, downside vulcanization finish coat, outside periphery vulcanization finish coat, cloth and the compound woven fabric of second rhombus on the compound woven fabric of first rhombus, double-deck inner bag includes upside vulcanization finish coat, downside vulcanization finish coat and outside periphery vulcanization finish coat, upside vulcanization finish coat is regular octagon structure with downside vulcanization finish coat, the coincide sets up between upside vulcanization finish coat and the downside vulcanization finish coat, upside vulcanization finish coat sets up outside periphery vulcanization finish coat with downside vulcanization finish coat laminated structure's periphery along circumference, the peripheral parcel of double-deck inner bag has the fibre back up coat of being wrapped up in turn by the compound woven fabric of first rhombus and the compound woven fabric of second rhombus. The utility model discloses a technological effect for bearing capacity height, material saving, be difficult for causing the preparation of jack-up air cushion upper and lower surface fracture gas leakage and convenient accurate concatenation.
Description
Technical Field
The utility model relates to a jack-up air cushion technical field specifically is a jack-up air cushion.
Background
The hoisting air cushion is used for rescuing accident sites such as traffic accidents, house collapse rescue, earthquake disasters and the like, plays an important role in rescue, and has a very important bearing capacity in the production and preparation process.
Therefore, the utility model relates to a bearing capacity is high, material saving, be difficult for causing the jack-up air cushion upper and lower surface fracture gas leakage and the convenient jack-up air cushion of accurate concatenation preparation seem very necessary.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a jack-up air cushion to solve the problem that proposes among the above-mentioned background art.
In order to realize the purpose, the utility model provides the following technical scheme: a hoisting air cushion comprises a double-layer inner container, an upper-side vulcanizable surface decoration layer, a lower-side vulcanizable surface decoration layer, an outer-side periphery vulcanizable surface decoration layer, a first diamond-shaped composite woven fabric and a second diamond-shaped composite woven fabric, wherein the double-layer inner container comprises the upper-side vulcanizable surface decoration layer, the lower-side vulcanizable surface decoration layer and the outer-side periphery vulcanizable surface decoration layer, the upper-side vulcanizable surface decoration layer and the lower-side vulcanizable surface decoration layer are of regular octagonal structures, the upper-side vulcanizable surface decoration layer and the lower-side vulcanizable surface decoration layer are arranged in an overlapped mode, the outer-side periphery vulcanizable surface decoration layer is arranged on the periphery of the combined structure of the upper-side vulcanizable surface decoration layer and the lower-side vulcanizable surface decoration layer in the circumferential direction, and a fiber reinforcing layer wrapped by the first diamond-shaped composite woven fabric and the second diamond-shaped composite woven fabric in an alternating mode is wrapped on the periphery of the double-layer.
Preferably, the double-layer inner container is of a regular octagonal structure.
Preferably, the upper surface of the upper-side vulcanizable finishing layer and the lower surface of the lower-side vulcanizable finishing layer are both provided with a positioning line and a central line, the positioning line is a connecting line between the edge end point and the central point of the regular octagonal structure, the connecting line between the edge end point and the central point of the central line, and two adjacent positioning lines form an isosceles triangle.
Preferably, the first diamond-shaped compound woven fabric comprises a first upper patch and a first lower patch, the first upper patch and the first lower patch are of an integral structure, the first upper patch and the first lower patch are both isosceles triangles, a first folding line is arranged between the first upper patch and the first lower patch, and a first warp and weft reinforcement line is arranged on the first diamond-shaped compound woven fabric.
Preferably, the second diamond-shaped compound woven fabric comprises a second upper patch, a second lower patch and a limiting edge pressing patch, the second upper patch, the second lower patch and the limiting edge pressing patch are of an integrated structure, the second upper patch and the second lower patch are isosceles triangles, a second diagonal line is arranged between the second upper patch and the second lower patch, and a second warp and weft reinforcing line is arranged on the second diamond-shaped compound woven fabric.
Preferably, the first upper patch and the first lower patch are folded in half along the first pair of folding lines and then attached to an isosceles triangle formed by two adjacent positioning lines or attached to a second diamond-shaped composite woven fabric formed by the second upper patch and the second lower patch.
Preferably, the second upper patch and the second lower patch are folded along a second pair of folding lines and then attached to the first diamond-shaped compound woven fabric formed by the first upper patch and the first lower patch.
Preferably, two adjacent limiting edge pressing patches are arranged in a pressing mode.
Compared with the prior art, the beneficial effects of utility model are that:
1. according to the hoisting air cushion, the second lower patch and the first lower patch are respectively provided with the limiting edge pressing patches, the limiting edge pressing patches positioned at the head and the tail of the adjacent second rhombic composite woven fabric are mutually overlapped and attached, the first warp and weft reinforcing wires on the first rhombic composite woven fabric are vertically staggered with the second warp and weft reinforcing wires on the second rhombic composite woven fabric, and the second warp and weft reinforcing wires at the overlapped part of the limiting edge pressing patches are also staggered with each other, so that the bearing capacity of the hoisting air cushion is high, and the upper surface and the lower surface of the hoisting air cushion are not easy to crack and leak air.
2. The lifting air cushion is characterized in that a double-layer liner is wrapped by a first diamond-shaped compound woven fabric and a second diamond-shaped compound woven fabric which are arranged in a way of respectively wrapping the double-layer liner along the circumferential direction, and overlapped limiting edge pressing patches are staggered at the position, which is easy to crack, between the adjacent first diamond-shaped compound woven fabrics, so that the whole thickness of the lifting air cushion is ensured, and the cracking and air leakage of the upper surface and the lower surface of the lifting air cushion are not easy to cause.
3. This jack-up air cushion, through the global design into regular octagon structure with the jack-up air cushion, wherein double-deck inner bag is regular octagon structure as inside support, and be provided with the positioning line, the central line, wherein the positioning line is the connecting wire of the limit terminal and the central point of regular octagon structure, wherein the limit terminal of central line and the connecting wire of central point, two adjacent positioning lines form isosceles triangle, and first paster of going up, first paster down, paster and second are isosceles triangle under the second, only need along the positioning line, the central line carry out the concatenation of one deck can, make the concatenation preparation that can be convenient accurate.
4. This jack-up air cushion through the double-deck inner bag of preparation, the first layer fibre back up coat of laminating, the fibrous back up coat of laminating second floor to and according to the needs of the thickness of required jack-up air cushion, laminate first layer fibre back up coat and the fibrous back up coat of second floor in turn, vulcanize the shaping at last and become a whole, and longitude and latitude reinforced line on every layer is crisscross each other, has improved the bearing capacity of jack-up air cushion greatly.
Drawings
FIG. 1 is a schematic structural view of a double-layer inner container of a hoisting air cushion;
FIG. 2 is a schematic cross-sectional view of a double-deck bladder of a jacking-mattress;
FIG. 3 is a schematic view of a first diamond-shaped composite spun rayon fabric structure of a jacking mattress;
FIG. 4 is a schematic view of a second diamond-shaped composite spun rayon fabric structure of a jacking mattress;
FIG. 5 is a schematic view of a splicing combination structure of a double-layer liner and a first diamond-shaped composite spun rayon fabric of a hoisting air cushion;
FIG. 6 is a schematic view of a splicing and combining structure of a double-layer inner container of a hoisting air cushion and two pieces of first diamond-shaped composite spun rayon cloth;
FIG. 7 is a schematic view of a splicing combination structure of a double-layer inner container of a hoisting air cushion and eight pieces of first diamond-shaped composite spun rayon cloth;
FIG. 8 is a schematic structural diagram of a lifting air cushion, in which a double-layer inner container is formed by splicing a first layer of diamond-shaped composite woven fabric and then splicing a second layer of diamond-shaped composite woven fabric;
FIG. 9 is a schematic structural view of a double-layer inner container of a lifting air cushion, wherein a layer of first diamond-shaped compound woven fabric is spliced with a layer of second diamond-shaped compound woven fabric;
fig. 10 is a schematic structural view of a double-layer inner container of a lifting air cushion, which is formed by splicing a first layer of first diamond-shaped compound woven fabric and then splicing eight second diamond-shaped compound woven fabrics.
In the figure: 1-double-layer liner; 11-upper side vulcanizable top coat; 12-a lower vulcanizable top coat; 13-a vulcanisable facing on the outer periphery; 14-a locating line; 15-center line; 2-first diamond-shaped compound woven fabric; 21-first upper patch; 22-first lower patch; 23-a first pair of fold lines; 24-a first warp reinforcing thread; 3-second diamond-shaped compound woven fabric; 31-a second upper patch; 32-a second lower patch; 33-limiting edge pressing and pasting; 34-a second pair of fold lines; 35-second latitudinal and longitudinal reinforcement lines.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-10, the utility model provides a technical solution: a hoisting air cushion comprises a double-layer inner container 1, an upper side vulcanizable surface decoration layer 11, a lower side vulcanizable surface decoration layer 12, an outer side periphery vulcanizable surface decoration layer 13, a first diamond-shaped compound woven fabric 2 and a second diamond-shaped compound woven fabric 3, the double-layer liner 1 comprises an upper side vulcanizable finishing layer 11, a lower side vulcanizable finishing layer 12 and an outer side periphery vulcanizable finishing layer 13, the upper side vulcanizable top finish 11 and the lower side vulcanizable top finish 12 are regular octagonal structures, the upper side vulcanizable finishing layer 11 and the lower side vulcanizable finishing layer 12 are overlapped, the outer periphery of the overlapped structure of the upper side vulcanizable finishing layer 11 and the lower side vulcanizable finishing layer 12 is circumferentially provided with an outer peripheral vulcanizable finishing layer 13, the periphery of the double-layer inner container 1 is wrapped with a fiber reinforcing layer which is alternately wrapped by a first diamond-shaped compound woven fabric 2 and a second diamond-shaped compound woven fabric 3.
In this embodiment, the double-layer liner 1 has a regular octagonal structure.
In this embodiment, the upper surface of the upper curable topcoat layer 11 and the lower surface of the lower curable topcoat layer 12 are both provided with a positioning line 14 and a central line 15, the positioning line 14 is a connecting line between an edge end point and a central point of a regular octagonal structure, the central line between the edge end point and the central point of the central line 15 is a connecting line, and two adjacent positioning lines 14 form an isosceles triangle.
In this embodiment, the first diamond-shaped compound woven fabric 2 includes a first upper patch 21 and a first lower patch 22, the first upper patch 21 and the first lower patch 22 are integrated into a single structure, both the first upper patch 21 and the first lower patch 22 are isosceles triangles, a first pair of folding lines 23 is disposed between the first upper patch 21 and the first lower patch 22, and a first warp reinforcement line 24 is disposed on the first diamond-shaped compound woven fabric 2.
In this embodiment, the second diamond-shaped composite woven fabric 3 includes a second upper patch 31, a second lower patch 32, and a limiting edge-pressing patch 33, the second upper patch 31, the second lower patch 32, and the limiting edge-pressing patch 33 are integrated, the second upper patch 31 and the second lower patch 32 are both isosceles triangles, a second pair of folding lines 34 is disposed between the second upper patch 31 and the second lower patch 32, and a second warp and weft reinforcement line 35 is disposed on the second diamond-shaped composite woven fabric 3.
In this embodiment, the first upper patch 21 and the first lower patch 22 are folded in half along the first pair of folding lines 23 and then attached to an isosceles triangle formed by two adjacent alignment lines 14 or attached to the second diamond-shaped composite woven fabric 3 formed by the second upper patch 31 and the second lower patch 32.
In this embodiment, the second upper patch 31 and the second lower patch 32 are folded in half along the second pair of folding lines 34 and then attached to the first diamond-shaped composite woven fabric 2 composed of the first upper patch 21 and the first lower patch 22.
In this embodiment, two adjacent limiting edge-pressing patches 33 are arranged in a pressing manner.
The preparation method of the hoisting air cushion specifically comprises the following steps:
the method comprises the following steps: preparing a double-layer inner container 1: after the upper side vulcanizable surface decoration layer 11, the lower side vulcanizable surface decoration layer 12 and the outer side periphery vulcanizable surface decoration layer 13 are placed into a determined position for splicing, a stainless steel charging nozzle is installed, and heating vulcanization is carried out through a mold and vulcanization equipment to form an independent inflatable double-layer liner 1;
step two: attaching a first fiber reinforcing layer: taking a plurality of first diamond-shaped compound woven fabric 2, folding the first diamond-shaped compound woven fabric in half along a first pair of folding lines 23 to form a first upper patch 21 and a first lower patch 22, then sleeving the first upper patch 2 on two adjacent positioning lines 14 on the double-layer liner 1 to form an isosceles triangle, and arranging the central line of the first upper patch 21 and the central line of the first lower patch 22 in alignment with the central line 15, and fully pasting the first diamond-shaped compound woven fabric 2 as a first fiber reinforcing layer along the circumferential direction of the double-layer liner 1 according to the method;
step three: and (3) attaching a second fiber reinforcing layer: sheathing a second diamond-shaped compound woven fabric 3 on the first fiber reinforcing layer, folding a plurality of second diamond-shaped compound woven fabrics 3 along a second pair of folding lines 34 to form a second upper patch 31 and a second lower patch 32, so that the second upper patch 31 is overlapped with the first upper patch 21, the second lower patch 32 is overlapped with the first lower patch 22, and fully adhering the second diamond-shaped compound woven fabric 3 along the circumferential direction of the first fiber reinforcing layer as a second fiber reinforcing layer according to the method;
step four: alternately laminating the first fiber reinforced layer and the second fiber reinforced layer according to the requirements of required bearing capacity and the method of the second step and the third step to prepare a hoisting air cushion model;
step five: and (3) vulcanization molding: the hoisting air cushion model is placed in a mould, heating vulcanization is carried out through a vulcanizing machine capable of supplying heat, and high-pressure gas is injected into the double-layer liner 1 during vulcanization, so that the multi-layer fiber reinforced layer and the vulcanizable material are tightly combined under the action of the high-pressure gas.
According to the preparation method of the hoisting air cushion, during vulcanization, high-pressure gas is injected into the double-layer liner, so that the multi-layer fiber reinforcing layer and the vulcanizable material are tightly combined under the action of the high-pressure gas, the edge is in a circular state under the action of the high-pressure gas, the stress area is increased, and the stress of the whole structure is uniform.
The working principle is as follows: according to the lifting air cushion, the second lower patch 32 and the first lower patch 22 are respectively provided with the limiting edge pressing patches 33, the limiting edge pressing patches 33 which are positioned at the head and the tail of the adjacent second diamond-shaped compound woven fabric 3 are mutually overlapped and attached, the first warp and weft reinforcing lines 24 on the first diamond-shaped compound woven fabric 2 and the second warp and weft reinforcing lines 35 on the second diamond-shaped compound woven fabric 3 are vertically staggered, and the second warp and weft reinforcing lines 35 at the overlapped part of the limiting edge pressing patches 33 are also staggered, so that the bearing capacity of the lifting air cushion is high, and the cracking and air leakage of the upper surface and the lower surface of the lifting air cushion are not easily caused. According to the crane air cushion, the double-layer liner 1 is wrapped by the first diamond-shaped compound woven fabric 2 and the second diamond-shaped compound woven fabric 3 which are arranged, the first diamond-shaped compound woven fabric 2 and the second diamond-shaped compound woven fabric 3 wrap the double-layer liner 1 along the circumferential direction respectively, the overlapped limiting edge pressing patches 33 are staggered at the position where the adjacent first diamond-shaped compound woven fabric 2 is easy to crack, the whole thickness of the crane air cushion is ensured, and meanwhile, the upper surface and the lower surface of the crane air cushion are not easy to crack and leak air. This hoisting air cushion, through the global design into regular octagon structure with hoisting air cushion, wherein double-deck inner bag 1 is regular octagon structure as inside support, and be provided with positioning line 14, central line 15, wherein positioning line 14 is the connecting wire of the limit endpoint and the central point of regular octagon structure, wherein the connecting wire of the limit endpoint and the central point of central line 15, two adjacent positioning lines 14 form isosceles triangle, and first paster 21 of going up, first paster 22 down, paster 31 is isosceles triangle with second paster 32 down on the second, only need along positioning line 14, central line 15 carry out the concatenation of one deck can, make the concatenation preparation that can be convenient accurate. This jack-up air cushion through preparing double-deck inner bag 1, the first layer fibre back up coat of laminating, the second layer fibre back up coat of laminating to and according to the needs of the thickness of required jack-up air cushion, laminate first layer fibre back up coat and second layer fibre back up coat in turn, vulcanize the shaping at last and become a whole, and longitude and latitude reinforced line on every layer is crisscross each other, has improved the bearing capacity of jack-up air cushion greatly. According to the preparation method of the hoisting air cushion, during vulcanization, high-pressure gas is injected into the double-layer liner 1, so that the multi-layer fiber reinforced layer and the vulcanizable material are tightly combined under the action of the high-pressure gas, the edge is in a circular state under the action of the high-pressure gas, the stress area is increased, and the stress of the whole structure is uniform.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A hoisting air cushion is characterized in that: the high-temperature-resistant and energy-saving composite polyester fabric comprises a double-layer inner container (1), an upper-side vulcanizable surface decoration layer (11), a lower-side vulcanizable surface decoration layer (12), an outer-side periphery vulcanizable surface decoration layer (13), a first diamond-shaped composite woven fabric (2) and a second diamond-shaped composite woven fabric (3), wherein the double-layer inner container (1) comprises the upper-side vulcanizable surface decoration layer (11), the lower-side vulcanizable surface decoration layer (12) and the outer-side periphery vulcanizable surface decoration layer (13), the upper-side vulcanizable surface decoration layer (11) and the lower-side vulcanizable surface decoration layer (12) are of a regular octagonal structure, the upper-side vulcanizable surface decoration layer (11) and the lower-side vulcanizable surface decoration layer (12) are arranged in an overlapped mode, the outer-side periphery vulcanizable surface decoration layer (13) is arranged on the periphery of the overlapped structure of the upper-side vulcanizable surface decoration layer (11) and the lower-side vulcanizable surface decoration layer (12) in an overlapped mode along the circumferential direction, and the fiber and the upper-side periphery of the double-layer (1) is wrapped by the first diamond-shaped composite woven fabric (2) and the second diamond-shaped composite woven fabric (3) in an alternate mode And (7) solidifying the layer.
2. The jacking mattress of claim 1, wherein: the double-layer inner container (1) is of a regular octagonal structure.
3. The jacking mattress of claim 1, wherein: the upper surface of the upper-side vulcanizable surface decoration layer (11) and the lower surface of the lower-side vulcanizable surface decoration layer (12) are respectively provided with a positioning line (14) and a central line (15), the positioning line (14) is a connecting line of an edge end point and a central point of a regular octagonal structure, the central point and the central point of the central line (15) are connected through the connecting line, and two adjacent positioning lines (14) form an isosceles triangle.
4. The jacking mattress of claim 1, wherein: the first rhombic composite woven terylene fabric (2) comprises a first upper patch (21) and a first lower patch (22), the first upper patch (21) and the first lower patch (22) are of an integral structure, the first upper patch (21) and the first lower patch (22) are isosceles triangles, a first pair of folding lines (23) are arranged between the first upper patch (21) and the first lower patch (22), and a first warp and weft reinforcement line (24) is arranged on the first rhombic composite woven terylene fabric (2).
5. The jacking mattress of claim 1, wherein: compound woven fabric of second rhombus (3) includes paster (31), second lower paster (32) and spacing blank holder paster (33) on the second, paster (31), second lower paster (32) and spacing blank holder paster (33) structure as an organic whole on the second, paster (31) and second lower paster (32) are isosceles triangle on the second, be provided with second diagonal line (34) under paster (31) and the second between paster (32) on the second, be provided with second longitude and latitude enhancement line (35) on the compound woven fabric of second rhombus (3).
6. The jacking mattress of claim 4, wherein: the first upper patch (21) and the first lower patch (22) are folded in half along a first folding line (23) and then attached to an isosceles triangle formed by two adjacent positioning lines (14) or attached to a second diamond-shaped compound woven fabric (3) formed by a second upper patch (31) and a second lower patch (32).
7. The jacking mattress of claim 5, wherein: the second upper patch (31) and the second lower patch (32) are folded along a second pair of folding lines (34) and then attached to the first diamond-shaped compound woven fabric (2) formed by the first upper patch (21) and the first lower patch (22).
8. The jacking mattress of claim 5, wherein: two adjacent spacing blank pressing paster (33) pressfitting setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121442780.7U CN214983738U (en) | 2021-06-28 | 2021-06-28 | Hoisting air cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121442780.7U CN214983738U (en) | 2021-06-28 | 2021-06-28 | Hoisting air cushion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214983738U true CN214983738U (en) | 2021-12-03 |
Family
ID=79104105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121442780.7U Expired - Fee Related CN214983738U (en) | 2021-06-28 | 2021-06-28 | Hoisting air cushion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214983738U (en) |
-
2021
- 2021-06-28 CN CN202121442780.7U patent/CN214983738U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211203 |