SHIPPING SYSTEMS AND METHODS FOR INSULATED SOLAR ENERGY RECEIVERS
Shipping systems and methods associated with solar concentrator receivers are disclosed herein. Representative securement devices extend into the interior of a receiver segment at both ends of the receiver segment. A first retention element and a second retention element, each having a first portion and a second portion configured to stack on top of each other, are configured to receive a corresponding securement device in notches manufactured into the first and the second retention elements. The first and the second retention elements can be configured to receive a vertical stability element to clamp the first portions to corresponding second portions, thereby retaining the securement devices. In these and other embodiments, a third retention element can be stacked on top of the first retention element and a fourth retention element can be positioned vertically adjacent to the first retention element.
The present application claims priority to U.S. Provisional Patent Application No. 62/620,909 filed Jan. 23, 2018, the entire disclosure of which is incorporated herein by reference.
TECHNICAL FIELDThe present technology is directed generally to shipping systems and methods for solar energy receivers, and, in particular, to shipping systems and methods for receiver segments having receiver tubes positioned annularly within insulating tubes.
BACKGROUNDReceivers (e.g., conduits) are used to receive sunlight directed at them by corresponding solar concentrators to heat and convert water (or another working fluid) passing through the receivers to steam (or other vapors). Such receivers often comprise a receiver tube (e.g., a steel tube) positioned annularly within an insulating tube (e.g., a glass tube). Because the receivers are often large in size, the receivers are typically manufactured in sections (e.g., to address shipping and handling constraints) comprising a plurality of receiver tubes and a corresponding plurality of insulating tubes. Furthermore, the receivers are often partially assembled into segments before shipping (e.g., to decrease required shipping space and/or to decrease assembly efforts at the final destination). In particular, the receiver tubes are often placed within corresponding insulating tubes before packaging and shipping the receiver segments. However, because the insulating tubes are frequently made from glass or another fragile material, several challenges arise in successfully shipping the receiver segments without damage. Accordingly, there remains a need in the art for improved shipping systems and methods associated with solar energy receivers.
The present technology is generally directed to shipping systems and methods for receivers used in solar energy collection and/or other suitable applications. In particular, the present technology can be used to improve shipping systems and methods associated with successfully shipping receiver segments without damage. For example, the technology can include securement devices that are each configured to grip an inside surface of a receiver tube at one end of a receiver segment. Receiver segments having a securement device attached to each end can be stacked and retained by retention devices. In this manner, a plurality of receiver segments can be stacked and retained in close proximity to one another while preventing contact between adjacent receiver segments. Additionally, spacers between adjacent receiver segments and/or truss members around at least some of the receiver segments can be used to further protect the receiver segments during shipping.
A benefit of embodiments of this technology is the time and cost saved by partially preassembling the receivers into segments and shipping the receiver segments without damage to their ultimate destination. Another benefit of embodiments of this technology includes safely shipping longer-than-typical receiver segments despite the increased risk that the longer receiver tubes will sag. By extending securement devices into the interior of the receiver tubes, embodiments of the present technology can shorten the unsupported length of the receiver tubes and increase their end-to-end stiffness. This, in turn, reduces the likelihood for the receiver tubes to sag when they are in a stacked arrangement, which reduces the likelihood that (1) shock and other forces encountered during shipping or handling or (2) activated vibrational modes of the receiver segments will (i) cause a receiver tube to contact its corresponding insulating tube or (ii) cause a receiver segment to contact adjacently stacked receiver segments.
As a result of the foregoing arrangements, lower cost materials (e.g., a heavy wall carbon steel as opposed to a thin wall stainless steel) can be used to form the receiver tubes, despite the increased risk of sagging associated with these lower cost material. Thus, the present technology can reduce production costs. In addition, the ability to ship longer receiver segments decreases the number of field welds and parts required during installation, which also reduces installation costs. Furthermore, the performance of the assembled receiver increases as the lengths of the shipped receiver segments increase. This is because there are fewer bellows structures within an assembled receiver, meaning that the active length of the receiver segments increases because less of the receiver segments are shadowed by the bellows structures. Moreover, the ability to ship receiver segments of various lengths permits the shipper to use more and different types of available space within a shipping container. This, in turn, permits a greater number of receiver segments per shipping container to be shipped, which reduces shipping costs.
B. SELECTED EMBODIMENTS OF SHIPPING SYSTEMS AND METHODS FOR INSULATED SOLAR ENERGY RECEIVERSAs shown in
With continued reference to
As shown, each retention element 240 can comprise a first portion 240a and a second portion 240b configured to stack on top of the first portion 240a. Each retention element portion 240a, 240b of the retention element 240 can include one or more notches configured to receive a securement device 230 and to retain the securement device 230 by clamping the second portion 240b to the first portion 240a e.g., with a vertical stability element 225 (
As described above, the retention elements 240 are configured to stack on top of each other to form one or more columns 224. In an embodiment illustrated in
Rows 222 of retention elements 240 can be arranged by positioning retention elements 240 and/or columns 224 of retention elements 240 horizontally adjacent to one another. In some embodiments, the rows 222 and columns 224 of the retention elements 240 can be held together by horizontal stabilization elements 227 (
Each column 224 of retention elements 240 can be capped with a capping retention element (not shown). In some embodiments, the capping retention elements can be a retention element portion 240a and/or 240b of a retention element 240 that does not receive one or more securement devices 230 in the one or more notches located at a top edge portion of the portion 240a and/or of the portion 240b. In other embodiments, the capping retention elements can be similar to the portions 240a, 240b of the retention elements 240 in only that the capping retention elements include one or more notches in a bottom edge portion of the capping retention elements configured to receive the top row of securement devices 230. In these and still further embodiments, the capping retention elements can include a vertical stabilization hole configured to receive the vertical stability element 225 such that the capping retention elements are clamped and/or held to retention elements 240 in corresponding columns 224. In these and other embodiments, the capping retention elements can include attachment devices such that the capping retention elements can be connected to the shipping container 211 or another shipping crate, thereby providing further stability to the stacked arrangement of receiver segments 113.
As shown in
Although embodiments of the system 220 are illustrated in
The collet 334 of the securement device 230 includes a proximal portion 335, a middle portion 336, and a distal portion 337. The proximal portion 335 and the distal portion 337 are each manufactured (e.g., shaped) to have a slanted side that interfaces with opposite sides of the middle portion 336. Referring now to
With continued reference to
In operation, the securement device 230 shown in
As shown in
The transverse portion 443 of the retention element portion 440 includes a vertical stabilization hole 444 positioned near the center of the transverse portion 443. As discussed above, the retention element portion 440 is configured to receive a vertical stability element (e.g., vertical stability element 225 shown in
The rectangular notch 515 and the triangular notch 516 of the retention element 540 are configured to receive the securement device 230. More specifically, the notches 515, 516 are configured to receive the rod 331, the stationary element 338, and/or a proximal portion 335 of the securement device 230. Furthermore, the retention element 540 is configured to retain the securement device 230 by clamping the securement device 230 (e.g., with first portion 540a and the second portion 540b and/or with a vertical stabilization element (not shown), as discussed above). In some embodiments, the retention element 540 further includes a second side with notches aligned with the notches 515, 516 (e.g., as partially shown in the portion 440 illustrated in
In the embodiment illustrated in
The embodiment illustrated in
At block 772, the routine 770 can include positioning a row of retention element portion(s). For example, the routine 770 can include installing a row 222 of retention element portion(s) at locations corresponding to one or both sides of an eventually stacked receiver segment 113 (as shown in
The routine 770 can include returning to block 772 to install the next row of retention element portion(s). For example, the routine 770 can include stacking the next row of retention element portion(s) on top of the previous row of retention element portion(s) such that the previously installed securement devices are positioned within notches located at a bottom edge portion of the retention element portion(s) in the next row. In some embodiments, the routine 770 can include ensuring that a flat machined into a securement device correctly interfaces with a side of a notch in a retention element portion in the next row. In these and other embodiments, the routine 770 can include returning to block 773 to install the next row of securement device(s) and/or can include repeating blocks 772 and/or 773 a desired number of times.
Additionally or alternatively, the routine 770, at any point, can include performing blocks 774-779. For example, the routine 770 can include installing truss member(s) at block 774 onto retention element portion(s), and/or the routine 770 can include installing spacer component(s) at block 775 between vertically adjacent receiver segments 113 and/or between horizontally adjacent receiver segments 113
In these and other embodiments, the routine 770 can include installing capping retention elements at block 776 on the top of a column of retention element(s), and/or the routine 770 can include installing vertical stabilization element(s) at block 777 into columns of retention element(s). For example, the routine 770 can include installing vertical stabilization element(s) into one or more vertical stabilization hole(s) in the capping retention element and/or into the retention element(s) in a column.
At block 778, the routine 770 can include installing horizontal stabilization element(s). For example, the routine 770 can include installing horizontal stabilization element(s) onto the top and/or bottom rows of retention elements. In these and other embodiments, the routine 770 can include installing horizontal stabilization element(s) into horizontal stabilization holes in the retention element(s) of a row of retention element(s). In these and still other embodiments, the routine 770 can include attaching the retention element(s), truss member(s), capping retention element(s), securement device(s), and/or horizontal stabilization element(s) to a shipping crate to provide further stability to the stacked arrangement (block 779).
Although the steps of routine 770 are discussed and illustrated in a particular order, the method illustrated by routine 770 is not so limited. In other embodiments, the method can be performed in a different order. For example, securement devices can be installed into receiver segment(s) and/or installed into retention element(s) before, during, and/or after positioning portion(s) the retention element(s). In other embodiments and as discussed above, any of blocks 774-779 can be performed before, during, and/or after blocks 771, 772, and/or 774. Moreover, blocks 771-779 are illustrated for the sake of completeness. A person skilled in the art will readily recognize that the illustrated method can be altered and still remain within these and other embodiments of the present technology. For example, one or more steps of the method illustrated in
Several aspects of the present technology are set forth in the following examples.
1. A system for transporting at least one receiver segment, the system comprising:
-
- a first securement device and a second securement device, each positionable to grip an inside surface of an end of a receiver segment;
- a first retention element and a second retention element, each having a first portion and a second portion,
- wherein
- the second portion of the first retention element is stackable on top of the first portion of the first retention element,
- the second portion of the second retention element is stackable on top of the second portion of the second retention element,
- the first securement device is coupleable to the first retention element, and
- the second securement device is coupleable to the second retention element.
The system of example 1 wherein the first and the second securement devices each comprise:
-
- a rod having a first end and a second end, wherein the second end is threaded;
- a collet attached to the second end of the rod, wherein the collet includes
- a proximal portion having a first width greater than an interior diameter of the insulated receiver tube and a second width less than the interior diameter and corresponding to a recess of the proximal portion,
- a distal portion between the proximal portion and the second end of the rod, wherein the distal portion is threaded, and
- a middle portion between the proximal portion and the distal portion; and a stationary element between the proximal portion and the first end of the rod,
- wherein
- the first and the second securement devices are positionable to extend a first distance into an interior of the receiver segment defined by the distance between the second end of the rod and the recess of the proximal portion, and
- the middle portion of the collet is moveable outwardly away from the rod as the distal portion is brought closer to the proximal portion by rotating the rod.
3. The system of example 1 or 2 wherein each portion of the first and the second retention elements comprises:
-
- a first vertical side and a second vertical side, wherein each vertical side includes a first notch in a top edge portion of the vertical side and a second notch aligned with the first notch and in a bottomedge portion of the vertical side; and
- a horizontal portion,
- wherein
- the first vertical side, the second vertical side, and the horizontal portion are positioned in an H-shape,
- at least one of the first notch or the second notch of the first retention element is positioned to receive the first securement device, and
- at least one of the first notch or the second notch of the second retention element is positioned to receive the second securement device.
The system of example 3 wherein at least one of he first notch or the second notch is triangular.
5. The system of example 3 or 4 wherein at least one of the first notch or the second notch is rectangular.
6. The system of any one of examples 3-5 wherein the first securement device includes a flat positioned to interface with a side of at least one of the first notch or the second notch of the first portion and the second portion, respectively, and to inhibit rotation of the first securement device.
7. The system of any one of examples 1-6, further comprising a threaded rod, wherein each portion of the first retention element includes a hole positioned to receive the threaded rod to clamp the first portion to the second portion thereby retaining the first securement device.
8. The system of any one of examples 1-7, further comprising a third retention element having a first portion and a second portion, wherein the first and second portions of the third retention element are positioned adjacent to the first and second portions of the first retention element, respectively, thereby forming a first row of retention elements.
9. The system of example 8, further comprising a horizontal stabilization element attached to the first and the third retention elements, wherein the horizontal stabilization element is positioned to hold the first retention element to the third retention element.
10. The system of example 9 wherein the horizontal stabilization element includes a first attachment end proximate to the first retention element and a second attachment end proximate to the third retention element, and wherein at least one of the first and the second attachment ends are positioned to attach to a shipping container.
11. The system of any one of examples 1-7, further comprising a third retention element having a first portion and a second portion stacked on top of at least the first portion of the first retention element, thereby forming a first column of retention elements, wherein the third retention element is positioned to receive a third securement device attached to an end of a receiver segment.
12. The system of example 11 wherein the first portion of the third retention element is the second portion of the first retention element.
13. The system of example 11 or 12, further comprising a capping retention element stacked directly on top of the second portion of the third retention element, wherein
-
- the capping retention element includes a first notch in a bottom edge portion of the capping retention element;
- the second portion of the third retention element includes a second notch in a top edge portion of the third retention element, the second notch being aligned with the first notch; and
- the capping retention element and the third retention element are positioned to receive a third securement device in the first notch and the second notch.
14. The system of any one of examples 11-13, further comprising at least one spacer positioned between vertically adjacent receiver segments to prevent vertically adjacent receiver segments from contacting one another.
15. The system of any one of examples 1-14, further comprising at least one truss member attached to the first and the second retention elements, wherein
each truss member comprises:
-
- a rectangular frame having two elongated sides generally in parallel with one another, and
- a plurality of truss elements each attached to each of the elongated sides; and
the at least one truss member is positioned to hold the first retention element to the second retention element.
16. The system of any one of examples 1-15, further comprising the receiver segment, the receiver segment having a first end and a second end opposite the first end, wherein
-
- the first securement device extends a first distance into an interior of the receiver segment at the first end; and
- the second securement device extends a second distance into the interior of the receiver segment at the second end.
17. The system of example 16 wherein the receiver segment includes a receiver tube positioned annularly within an insulating tube.
18. A method of packaging one or more receiver segments, the method comprising:
-
- installing a first securement device into a first end of a first receiver segment;
- installing a second securement device into a second end of the first receiver segment;
- positioning the first securement device into a first notch of a first portion of a first retention element;
- positioning the second securement device into a first notch of a first portion of a second retention element;
- stacking a second portion of the first retention element onto the first portion of the first retention element, wherein the first securement device is positioned in a first notch of the second portion of the first retention element; and
- stacking a second portion of the second retention element onto the first portion of the second retention element, wherein the second securement device is positioned in a first notch of the second portion of the second retention element.
19. The method of example 18, further comprising installing a truss element to attach the first retention element to the second retention element.
20. The method of example 18 or 19, further comprising installing a vertical stabilization element into the first retention element via vertical stabilization holes in the first portion and the second portion of the first retention element.
21. The method of any one of examples 18-20, further comprising:
-
- installing a third securement device into a first end of a second receiver segment; and
- positioning the third securement device into a second notch of the second portion of the first retention element.
22. The method of example 21, further comprising installing a spacer component on the first receiver component before positioning the third and the fourth securement devices.
23. The method of example 21 or 22, further comprising stacking a capping retention element onto the second portion of the first retention element, wherein the third securement device is positioned in a first notch of the capping retention element.
24. The method of example 23, further comprising installing a vertical stabilization element into the capping retention element and the first retention element via vertical stabilization holes in the first retention element and the capping retention element,
25. The method of any one of examples 18-24 wherein the first securement device includes a flat, and wherein the first securement device is installed into the first receiver segment and positioned within the first notch of the first portion such that the flat interfaces with at least one side of the first notch and holds the first receiver segment in a first rotational orientation.
26. The method of any one of examples 18-25, further comprising: installing a third securement device into a first end of a second receiver segment;
-
- positioning a first portion of a third retention element vertically adjacent to the first portion of the first retention element;
- positioning the third securement device into a first notch of the first portion of the third retention element; and
- stacking a second portion of the third retention element onto the first portion of the third retention element, wherein the third securement device is positioned in a first notch of the second portion of the third retention element.
27. The method of example 26, further comprising installing a horizontal stabilization element across the first retention element and the third retention element.
28. The method of example 26 or 27, further comprising attaching at least one of the first retention element and the third retention element to a shipping container via the horizontal stabilization element.
D. CONCLUSIONThe above detailed descriptions of embodiments of the technology are not intended to be exhaustive or to limit the technology to the precise form disclosed above. Although specific embodiments of, and examples for, the technology are described above for illustrative purposes, various equivalent modifications are within the scope of the technology. For example, in some embodiments, receiver segments 113 can operate as standalone receivers 103. As another example, although steps are presented in a given order, other embodiments may perform steps in a different order. The various embodiments described herein may also be combined to provide further embodiments.
From the foregoing, it will be appreciated that specific embodiments of the technology have been described herein for purposes of illustration, but well-known structures and functions have not been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments of the technology. To the extent any materials incorporated herein by reference conflict with the present disclosure, the present disclosure controls. Where the context permits, singular or plural terms may also include the plural or singular term, respectively. Moreover, as used herein, the phrase “and/or” as in “A and/or B” refers to A alone, B alone, and both A and B. Additionally, the terms “comprising,” “including,” “having,” and “with” are used throughout to mean including at least the recited feature(s) such that any greater number of the same feature and/or additional types of other features are not precluded.
From the foregoing, it will also be appreciated that various modifications may be made without deviating from the disclosure. For example, various components of the technology can be further divided into subcomponents, or various components and functions of the technology may be combined and integrated. In addition, certain aspects of the technology described in the context of particular embodiments may also be combined or eliminated in other embodiments. Furthermore, although advantages associated with certain embodiments of the technology have been described in the context of those embodiments, other embodiments may also exhibit such advantages, and not all embodiments need necessarily exhibit such advantages to fall within the scope of the technology, Accordingly, the disclosure and associated technology can encompass other embodiments not expressly shown or described herein.
Claims
1. A system for transporting at least one receiver segment, the system comprising:
- a first securement device and a second securement device, each positionable to grip an inside surface of an end of a receiver segment;
- a first retention element and a second retention element, each having a first portion and a second portion,
- wherein the second portion of the first retention element is stackable on top of the first portion of the first retention element, the second portion of the second retention element is stackable on top of the first portion of the second retention element, the first securement device is coupleable to the first retention element, and the second securement device is coupleable to the second retention element.
2. The system of claim 1 wherein the first and the second securement devices each comprise:
- a rod having a first end and a second end, wherein the second end is threaded;
- a collet attached to the second end of the rod, wherein the collet includes a proximal portion having a first width greater than an interior diameter of the insulated receiver tube and a second width less than the interior diameter and corresponding to a recess of the proximal portion, a distal portion between the proximal portion and the second end of the rod, wherein the distal portion is threaded, and a middle portion between the proximal portion and the distal portion; and
- a stationary element between the proximal portion and the first end of the rod,
- wherein the first and the second securement devices are positionable to extend a first distance into an interior of the receiver segment defined by the distance between the second end of the rod and the recess of the proximal portion, and the middle portion of the collet is configured to moveable outwardly away from the rod as the distal portion is brought closer to the proximal portion by rotating the rod.
3. The system of claim I wherein each portion of the first and the second retention elements comprises:
- a first vertical side and a second vertical side, wherein each vertical side includes a first notch in a top edge portion of the vertical side and a second notch aligned with the first notch and in a bottom edge portion of the vertical side; and
- a horizontal portion,
- wherein the first vertical side, the second vertical side, and the horizontal portion are positioned in an H-shape, at least one of the first notch or the second notch of the first retention element is positioned to receive the first securement device, and at least one of the first notch or the second notch of the second retention element is positioned to receive the second securement device.
4. The system of claim 3 wherein at least one of the first notch or the second notch is triangular.
5. The system of claim 3 wherein at least one of the first notch or the second notch is rectangular.
6. The system of claim 3 wherein the first securement device includes a flat positioned to interface with a side of at least one of the first notch or the second notch of the first portion and the second portion, respectively, and to inhibit rotation of the first securement device.
7. The system of claim 1, further comprising a threaded rod, wherein each portion of the first retention element includes a hole positioned to receive the threaded rod to clamp the first portion to the second portion thereby retaining the first securement device.
8. The system of claim 1, further comprising a third retention element having a first portion and a second portion, wherein the first and second portions of the third retention element are positioned adjacent to the first and second portions of the first retention element, respectively, thereby forming a first row of retention elements.
9. The system of claim 8, further comprising a horizontal stabilization element attached to the first and the third retention elements, wherein the horizontal stabilization element is positioned to hold the first retention element to the third retention element.
10. The system of claim 9 wherein the horizontal stabilization element includes a first attachment end proximate to the first retention element and a second attachment end proximate to the third retention element, and wherein at least one of the first and the second attachment ends are positioned to attach to a shipping container.
11. The system of claim 1, further comprising a third retention element having a first portion and a second portion stacked on top of at least the first portion of the first retention element, thereby forming a first column of retention elements, wherein the third retention element is positioned to receive a third securement device attached to an end of a receiver segment.
12. The system of claim 11 wherein the first portion of the third retention element is the second portion of the first retention element.
13. The system of claim 11, further comprising a capping retention element stacked directly on top of the second portion of the third retention element, wherein
- the capping retention element includes a first notch in a bottom edge portion of the capping retention element;
- the second portion of the third retention element includes a second notch in a top edge portion of the third retention element, the second notch being aligned with the first notch; and
- the capping retention element and the third retention element are positioned to receive a third securement device in the first notch and the second notch.
14. The system of claim 11, further comprising at least one spacer positioned between vertically adjacent receiver segments to prevent vertically adjacent receiver segments from contacting one another.
15. The system of claim 1, further comprising at least one truss member attached to the first and the second retention elements, wherein
- each truss member comprises: a rectangular frame having two elongated sides generally in parallel with one another, and a plurality of truss elements each attached to each of the elongated sides; and
- the at least one truss member is positioned to hold the first retention element to the second retention element.
16. The system of claim 1, further comprising the receiver segment, the receiver segment having a first end and a second end opposite the first end, wherein
- the first securement device extends a first distance into an interior of the receiver segment at the first end; and
- the second securement device extends a second distance into the interiorof he receiver segment at the second end.
17. The system of claim 16 wherein the receiver segment includes a receiver tube positioned annularly within an insulating tube.
18. A method of packaging one or more receiver segments, the method comprising:
- installing a first securement device into a first end of a first receiver segment;
- installing a second securement device into a second end of the first receiver segment;
- positioning the first securement device into a first notch of a first portion of a first retention element;
- positioning the second securement device into a first notch of a first portion of a second retention element;
- stacking a second portion of the first retention element onto the first portion of the first retention element, wherein the first securement device is positioned in a first notch of the second portion of the first retention element; and
- stacking a second portion of the second retention element onto the first portion of the second retention element, wherein the second securement device is positioned in a first notch of the second portion of the second retention element.
19. The method of claim 18, further comprising installing a truss element to attach the first retention element to the second retention element.
20. The method of claim 18, further comprising installing a vertical stabilization element into the first retention element via vertical stabilization holes in the first portion and the second portion of the first retention element.
21. The method of claim 18, further comprising:
- installing a third securement device into a first end of a second receiver segment; and
- positioning the third securement device into a second notch of the second portion of the first retention element.
22. The method of claim 21, further comprising installing a spacer component on the first receiver component before positioning the third and the fourth securement devices.
23. The method of claim 21, further comprising stacking a capping retention element onto the second portion of the first retention element, wherein the third securement device is positioned in a first notch of the capping retention element.
24. The method of claim 23, further comprising installing a vertical stabilization element into the capping retention element and the first retention element via vertical stabilization holes in the first retention element and the capping retention element.
25. The method of claim 18 wherein the first securement device includes a flat, and wherein the first securement device is installed into the first receiver segment and positioned within the first notch of the first portion such that the flat interfaces with at least one side of the first notch and holds the first receiver segment in a first rotational orientation.
26. The method of claim 18, further comprising:
- installing a third securement device into a first end of a second receiver segment;
- positioning a first portion of a third retention element vertically adjacent to the first portion of the first retention element;
- positioning the third securement device into a first notch of the first portion of the third retention element; and
- stacking a second portion of the third retention element onto the first portion of the third retention element, wherein the third securement device is positioned in a first notch of the second portion of the third retention element.
27. The method of claim 26, further comprising installing a horizontal stabilization element across the first retention element and the third retention element.
28. The method of claim 27, further comprising attaching at least one of the first retention element and the third retention element to a shipping container via the horizontal stabilization element.
Type: Application
Filed: Jan 22, 2019
Publication Date: Dec 19, 2019
Inventors: Peter Emery von Behrens (Oakland, CA), Hayden Graham Burvill (San Carlos, CA), Justin Raade (Fremont, CA), Kenneth A. Williams (Fremont, CA)
Application Number: 16/254,349