# Patent

## Title
Modular rack for phytochemical extraction system

## Abstract

A modular rack for mounting components of a phytochemical extraction system is described. The module rack includes at least two legs and one or more frame modules that are each at least 2 units in length. Multiple frame modules can be combined to create racks of width N, where N is an integer greater than 2 units in length. Each frame module may also include mounting devices configured to removably attach extraction columns to the frame module.

## Background
PRIORITY CLAIM
This application claims the benefit of U.S. Provisional Patent Application No. 62/360,737, entitled “SOLVENT DEPRESSURIZATION DEVICES, SYSTEM, AND METHODS,” filed on Jul. 11, 2016; and U.S. Provisional Patent Application No. 62/373,284, entitled “EXTRACTION COLUMN FOR A PHYTOCHEMICAL EXTRACTION SYSTEM,” filed on Aug. 10, 2016, the contents of which are incorporated herein by reference in their entireties.


TECHNICAL FIELD
The present disclosure relates to a modular rack for mounting components of a phytochemical extraction system.
BACKGROUND
Typical phytochemical extraction systems include multiple devices, vessels, columns, containers, and the like. Such items are used to hold solvents, coolants, material, and the like. Some of these items may be mounted to a rack or other structure to hold them in fixed positions while they are employed as part of an extraction process.
Prior art frame designs are static and non-adjustable. The number of columns on the rack, and the size of the rack, are fixed, and this limits the freedom one has to rearrange the machine that hangs on it. In addition, prior art racks typically employ hangers to mount columns. Each hanger requires a pair of wing-nuts or bolts to open and close. These will often fall on the ground and get lost. The inventive modular rack disclosed herein addresses these shortcomings.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a first view of a modular rack according to one embodiment.
FIG. 2 is a second view of a modular rack according to one embodiment.
FIGS. 3A-3C are perspective, front, and side views of a modular rack.
FIGS. 4A-4C are perspective, front, and side views of a support leg according to one embodiment.
FIGS. 5A-5C are perspective, front, and side views of a frame module according to one embodiment.
FIGS. 6A and 6B are perspective views of attachment devices configured to attach an item to a frame module.
FIG. 7 is a photograph which shows a detailed view of a column attached to a frame via an attachment device according to one embodiment.



DETAILED DESCRIPTION
Embodiments described herein provide a modular rack for mounting components of a phytochemical extraction system. As will be discussed further below, the inventive rack provides a foundation that is modular and flexible. The modular rack comprises separate leg segments combined with one or more frame portions. Each frame portion holds either two or three columns. When two legs and one or more frame segments are attached to one another, a rack having an integral width N>=2 can be formed. For example, a frame portion of length 2 feet and a frame portion of length 3 feet can be combined with two legs to form rack of width 5 feet. Long spans and/or heavy loads can be accommodated by adding an additional (e.g., third, fourth) leg segment between two frame portions.
The described rack also provides an improved, easy to use, and stable structure for connecting columns to the rack. The described rack replaces the fasteners (e.g., bolts, wing nuts) associated with hanger-based systems with a pair of compression collets, which are retained on the frame when the column is removed. The described rack thus reduces the action required to mount/de-mount each column to the loosening and tightening of two large nuts. The fastening system is described in more detail with reference to FIGS. 6A and 6B, below.
FIG. 1 is a first view of a modular rack according to one embodiment. FIG. 1 depicts a modular rack 100 that carries five extraction and recovery columns 106 as part of a phytochemical extraction system. The rack 100 includes a first leg 102a, a second leg 102b, a first modular frame 104a, and a second modular frame 104b. In the illustrated embodiment, the legs and frames are manufactured from steel or other metal tubing. Non-metal implementations are also possible.
Each of the legs 102a and 102b comprise a vertical member, a horizontal member, a diagonal member, and two casters. Typical embodiments have only a single diagonal support member for each leg, which improves lateral accessibility to the columns 106 and/or other devices attached to the rack 100. Example columns are shown and described in U.S. Provisional Patent Application No. 62/373,284, entitled “EXTRACTION COLUMN FOR A PHYTOCHEMICAL EXTRACTION SYSTEM,” filed on Aug. 10, 2016.
Each of the frames 104a and 104b are rectilinear in shape. Each of the frames 104a and 104b are removably attached on each side either to the other frame or to one of the legs 102a or 102b. Through-bolts (e.g., one-half inch, 12 mm) are used to attach the frames in the illustrated embodiment. Various other attachment mechanisms are contemplated.
The rack 100 can be configured to provide an attachment surface of varying width, by utilizing multiple modular frames. In the illustrated embodiment, frame 104a has a width of 2 units, while frame 104b has a width of 3 units. The total width of the rack 100 is thus 5 units. A unit may be defined as a measure of distance, such as 1 unit=1 foot. By utilizing one or more modular frames, a user may configure the rack 100 to take on different total widths. For example, where modular frames can have widths of 2 or 3 units, the rack 100 can be configured to have any integral total width N>=2. The maximum total rack width of a rack is limited by the strength of the through bolts that connect frames to each other and the legs. While the strength of the bolts will vary with the exact bolt material, dimensions, and thread spacing, a typical one-half inch bolt has a pull-out strength measured in the tens of thousands of pounds. In practice, an extra leg section can be inserted mid-span or every five or six feet of run. A six foot run supports 6 columns per side. Additionally, longer runs can be broken up into individual stand-alone sections, with legs at each end.
In general, if a modular frame has a width of W units, the total rack width is expressed as N=M*W, where M is the number of modular frames employed, and W is the width of a frame module. As discussed, modular frames of differing widths can be used. For example, given modules of width W1 and modules of width W2 (W1< >W2), the total rack width can be expressed as N=M1*W1+M2*W2.
The described modular rack provides numerous benefits. First, as discussed above, it can be configured to take on different total widths, thereby adapting to particular applications or environments. Second, the frame can be readily disassembled and collapsed for storage or shipment.
FIG. 2 is a second view of a modular rack according to one embodiment. In this view, the rack 100 is shown without the attached extraction columns 106.
FIGS. 3A-3C are perspective, front, and side views, respectively, of a modular rack 100. Rack 100 is here configured to use only a single modular frame 104a having a width of 2 units.
FIGS. 4A-4C are perspective, front, and side views, respectively, of a support leg 102b according to one embodiment. The support leg 102b is constructed from three sections (horizontal, diagonal, and vertical) of steel structural square tube. The vertical member is welded at one end to about the midpoint of the horizontal member, in a perpendicular arrangement. The diagonal brace member provides structural rigidity and is welded at its ends to the horizontal member and the vertical member.
The vertical member of the leg 102b includes holes 401a and 401b. As will be discussed further below, these holes facilitate attachment to a frame module.
FIGS. 5A-5C are perspective, front, and side views of a frame module 104a according to one embodiment. The frame module 104a has a width of 2 units. The frame module 104a is constructed from four sections of steel structural square tube, welded at the corners.
The frame module 104a also includes holes 501a and 501b. These holes facilitate attachment to a support leg, or to another frame module. For example, the module 104a may be attached to leg 102b (FIG. 4A) by way of a first bolt that passes through holes 501a and 401a (of leg 102b) and a second bolt that passes through holes 501b and 401b (of leg 102b).
The frame module 104a also includes attachment devices 502a and 502b for extraction columns or other devices. Attachment device 502b is shown in exploded configuration. Attachment devices are described in additional detail with respect to FIGS. 6A and 6B, next.
FIGS. 6A and 6B are perspective views of the attachment devices introduced with respect to FIG. 5A, above. Each attachment device 502 includes a collet 601 that clamps onto a corresponding steel pin that is welded onto each column. A collet is a segmented band or sleeve that is put around a spindle or shaft and tightened so as to grip the shaft. The collet sleeve has a conical shape, which is compressed into a conical housing 603 as a nut 602 is tightened. When the nut is loosened, it impinges on a shelf on the mounting pin, breaking internal friction to push it out. The exploded view of attachment device 502 illustrates how the nut 602 encloses the perforated collet 601 and compresses it into the receiving housing 603, which is welded to the frame 104.
FIG. 7 is a photograph which shows a detailed view of a column attached to a frame via an attachment device according to one embodiment. In the photograph, a leg 102 is shown attached to a frame module 104, and a column 106 is shown attached to the frame module 104 via an attachment device 502.
While embodiments of the invention have been illustrated and described, as noted above, many changes can be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is not limited by the above disclosure.

## Claims

1. A modular rack, comprising:
a first leg having a vertical member attached to a horizontal member;
a second leg having a vertical member attached to a horizontal member; and
a variable width frame comprising one or more frame modules, wherein each frame module is rectilinear in shape, wherein each frame module has a left side and a right side, wherein each frame module is W1 units of distance wide, wherein each side of each frame module is attachable to a side of another one of the frame modules or to a top end of the vertical member of one of the first leg or second leg,
such that the variable width frame is configurable to provide the modular rack with a width of N units of distance by combining the first leg, second leg, and M frame modules, wherein N=M*W1, and wherein M is the total number of frame modules in the modular rack, and
wherein each of the frame modules includes an upper mounting device and a lower mounting device that are each configured to removably attach an extraction column to the frame module, wherein each mounting device comprises a nut, a sleeve that is welded to the frame module, and a collet configured to receive a post welded to a corresponding extraction column, wherein tightening the nut causes the collet to grip the post of the extraction column.

2. The modular rack of claim 1, wherein a frame module of W1 units of distance is configured to carry at most W1 extraction columns.

3. The modular rack of claim 2, wherein W1=2 units of distance.

4. The modular rack of claim 2, wherein the variable width frame further comprises one or more frame modules that are each W2 units of distance wide, wherein W1 is not equal to W2, wherein the variable width frame is configurable to provide the modular rack with a width of N units of distance by combining the first leg, second leg, and M1 frame modules of width W1 and M2 frame modules of width W2, wherein N=M1*W1+M2*W2, wherein M1 is the total number of frame modules of width W1 in the rack, and wherein M2 is the total number of frame modules of width W2 in the rack.

5. The modular rack of claim 4, wherein W1=2 units of distance and W2=3 units of distance.

6. The modular rack of claim 1, further comprising:
a first frame module having a width of W1 units of distance;
a second frame module having a width of W2 units of distance;
wherein the right side of the first frame module is removably and directly attached to a top end of the vertical member of the first leg,
wherein the left side of the first frame module is removably and directly attached to the right side of the second frame module,
wherein the left side of the second frame module is removably and directly attached to a top end of the vertical member of the second leg, such that the first frame module is attached to the second leg via the second frame module,
wherein N=W1+W2.

7. The modular rack of claim 6, wherein W1=2 units of distance and W2=3 units of distance.

8. The modular rack of claim 1, wherein the first leg and the second leg each include only a single diagonal support member attached at a first end to the horizontal member and at a second end to the vertical member.

9. The modular rack of claim 1, further comprising:
a first and second caster attached to the horizontal member of the first leg; and
a third and fourth caster attached to the horizontal member of the second leg.

10. The modular rack of claim 1, wherein the unit of distance is 1 foot.

11. A modular rack, comprising:
a first leg having a vertical member attached to a horizontal member;
a second leg having a vertical member attached to a horizontal member; and
a variable width frame comprising one or more frame modules, wherein each frame module is rectilinear in shape, wherein each frame module has a left side and a right side, wherein each side of each frame module is attachable to a side of another one of the frame modules or to a top end of the vertical member of one of the first leg or second leg,
wherein each of the frame modules includes an upper mounting device and a lower mounting device that are each configured to removably attach an extraction column to the frame module, wherein each mounting device comprises a nut, a sleeve that is welded to the frame module, and a collet configured to receive a post welded to a corresponding extraction column, wherein tightening the nut causes the collet to grip the post of the extraction column.

12. The modular rack of claim 11, further comprising:
a first frame module; and
a second frame module;
wherein the right side of the first frame module is removably and directly attached to a top end of the vertical member of the first leg,
wherein the left side of the first frame module is removably and directly attached to the right side of the second frame module,
wherein the left side of the second frame module is removably and directly attached to a top end of the vertical member of the second leg, such that the first frame module is attached to the second leg via the second frame module.