Flow Stop Device

Abstract

Described herein is a flow stop assembly configured to control flow through tubing, the flow stop assembly including a flow stop base and a pincher. The flow stop base includes a base wall, at least one pincher guard, a tubing guide, a pincher recess, a pincher protrusion, and a base extension. The pincher is movable relative to the base extension, such that in a flow position, a pincher surface is spaced apart from the pincher protrusion, and in a blocking position, the pincher surface is disposed adjacent to the pincher protrusion and is configured to obstruct flow through the tubing.

Description

[Technical field]

[0001] The present disclosure relates generally to flow control devices, and more particularly, to flow control devices for tubing. [Background technology]

[0002] Medical treatments often involve infusing a patient with medical fluids (e.g., saline solution or liquid medications) using an intravenous (IV) catheter, which is connected to a source of fluid (e.g., an IV bag) through an arrangement of flexible tubing and fittings (commonly referred to as an "IV set"). During use, the flow of medical fluid through the tubing can be occluded by a pinch clamp to control the flow of medical fluid. Often, the pinch clamp is designed for a specific tubing size.

[0003] In some applications, variations in tube size can hinder the performance of the pinch clamp. Summary of the Invention

[0004] The disclosed subject matter relates to a flow stop assembly. In certain embodiments, a flow stop assembly configured to control flow through tubing is disclosed, the flow stop assembly including a flow stop base and a pincher. The flow stop base includes a base wall extending from the flow stop base; at least one pincher guard extending from the base wall, the at least one pincher guard configured to be disposed around the tubing; a tubing guide configured to receive the tubing, the at least one pincher guard and the tubing guide being axially spaced apart and configured to axially align the tubing through the flow stop base; a pincher recess defined between the base wall, the at least one pincher guard, and the tubing guide; a pincher protrusion disposed within the pincher recess and configured to abut the tubing, the pincher protrusion extending from the base wall; and a base extension extending away from the pincher recess. The pincher is movable relative to the base extension and includes a pincher surface, the pincher being configured to move between a flow position and a blocked position, in the flow position the pincher surface is spaced apart from the pincher protrusion and in the blocked position the pincher surface is disposed adjacent to the pincher protrusion and is configured to obstruct flow through the tubing.

[0005] In certain embodiments, a flow stop assembly is disclosed that includes tubing defining a flow path, a flow stop base, and a pincher. The flow stop base includes a base wall extending from the flow stop base; at least one pincher guard extending from the base wall, the at least one pincher guard configured to be disposed about the tubing; a tubing guide configured to receive the tubing, the at least one pincher guard and the tubing guide being axially spaced apart and configured to axially align the tubing through the flow stop base; a pincher recess defined between the base wall, the at least one pincher guard, and the tubing guide; a pincher protrusion disposed in the pincher recess and configured to abut the tubing, the pincher protrusion extending from the base wall; and a base extension extending away from the pincher recess. The pincher is movable relative to the base extension and includes a pincher surface, the pincher being configured to move between a flow position and a blocked position, in the flow position the pincher surface is spaced apart from the pincher protrusion and in the blocked position the pincher surface is disposed adjacent to the pincher protrusion and is configured to obstruct flow through the tubing.

[0006] In certain embodiments, a method is disclosed that includes the steps of providing a fluid flow through tubing; actuating pinchers against the tubing to collapse the tubing over the pincher protrusions; and obstructing the fluid flow through the tubing.

[0007] It is understood that various configurations of the subject technology will be readily apparent to those skilled in the art from this disclosure, and that various configurations of the subject technology have been shown and described by way of example. As will be appreciated, the subject technology is capable of other and different configurations, and its several details can be modified in various other respects, all without departing from the scope of the subject technology. Accordingly, the summary, drawings, and detailed description are to be regarded as illustrative in nature, and not as restrictive.

[0008] The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification, illustrating disclosed embodiments and, together with the description, serve to explain the principles of the disclosed embodiments. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view of a flow stop assembly in a flow position according to various aspects of the present disclosure. [Diagram 2] 2 is a reverse perspective view of the flow stop assembly of FIG. 1 in a flow position according to various embodiments of the present disclosure. [Diagram 3] FIG. 2 is a perspective view of a flow stop assembly in a closed position according to various aspects of the present disclosure. [Figure 4] FIG. 4 is an elevational view of the flow stop assembly of FIG. 3 in a closed position according to various embodiments of the present disclosure. [Diagram 5] FIG. 2 is a perspective view of a flow stop assembly in a flow position according to various aspects of the present disclosure. [Figure 6] FIG. 1 is a perspective view of a flow stop assembly according to various aspects of the present disclosure. [Figure 7] FIG. 1 is a perspective view of a flow stop assembly according to various aspects of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The disclosed flow stop assembly incorporates a pinching mechanism to collapse the tubing and occlude fluid flow therethrough. The pinchers may be movable to collapse the tubing over the pincher protrusions. By collapsing the tubing, flow in the tubing may be reliably occluded when using a wide variety of tubing sizes.

[0011] The detailed description set forth below is intended as a description of various configurations of the subject technology, and is not intended to represent the only configurations in which the subject technology may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the subject technology. However, it will be apparent to those skilled in the art that the subject technology may be practiced without these specific details. In some cases, well-known structures and components may be shown in block diagram form to avoid obscuring the concepts of the subject technology. Similar components are labeled by the same element numbers for ease of understanding. Reference numerals may have letter suffixes added to indicate separate instances of common elements, but are generally referred to by the same numerals without the suffixes.

[0012] Although the following description relates to the occlusion of a medical fluid during administration of the medical fluid using the disclosed flow stop assembly, it should be understood that this description is merely an example of use and does not limit the scope of the claims. The various aspects of the disclosed flow stop assembly may be used in any application in which it is desirable to control the flow of a fluid.

[0013] The disclosed flow stop assembly overcomes several problems found with certain conventional clamps. One problem with certain conventional clamps is that they are designed to be used with certain tubing sizes. Variations in tubing sizes may interfere with the performance of the conventional clamp or require different sizes of conventional clamps, making the use of the conventional clamps undesirable.

[0014] Therefore, in accordance with the present disclosure, it would be advantageous to provide a flow stop assembly as described herein that allows for flow occlusion with a wide variety of tubing sizes. The disclosed flow stop assembly provides a folding mechanism that allows for reliable flow occlusion for a wide variety of tubing sizes.

[0015] Here, an example of a flow stop assembly that allows for reliable flow occlusion is described.

[0016] 1 is a perspective view of a flow stop assembly 100 in a flow position, according to various embodiments of the present disclosure. In the example shown, the flow stop assembly 100 controls the flow of a fluid (such as, for example, a medical fluid) as the fluid is delivered from a fluid source to a patient. As shown, the medical fluid may be directed through a flow path defined by tubing 102. As can be appreciated, the tubing 102 can be of any appropriate diameter required for treatment.

[0017] During operation, an occlusion mechanism of the flow stop assembly 100 can be actuated, allowing fluid flow to be permitted or fluid flow can be occluded by collapsing the tubing 102, occluding flow through the tubing 102. As shown, a portion of the tubing 102 passes through the flow stop base 110, allowing the flow stop assembly 100 to control the flow through the tubing 102.

[0018] In some embodiments, the tubing 102 extends through, is axially aligned with, and / or is retained by the pincher guard 114 and the tubing guide 112. In the illustrated embodiment, the pincher guard 114 extends from a base wall 111 on either side of the tubing 102. The base wall 111 may extend vertically from the flow stop base 110 and may include ribs to facilitate interlocking with other components. The pincher guard 114 may prevent lateral movement of the tubing 102 during operations (including pinching or occlusion operations).

[0019] A lower portion of the tubing 102 may pass through a tubing guide 112 formed in the flow stop base 110. The tubing guide 112 may be a cylindrically shaped member configured to receive the tubing 102. The tubing guide 112 may be sized to prevent radial movement of the tubing 102 while allowing axial movement of the tubing 102. The tubing guide 112 and the pincher guard 114 may cooperatively axially align the tubing 102. In certain embodiments, the tubing 102 may be axially secured or coupled within the tubing guide 112. As may be appreciated, the tubing guide 112 may be spaced apart from the pincher guard 114 and define a pincher recess 116 across which the tubing 102 extends. Additionally, the base wall 111 may define pincher recesses 116 and may prevent or limit radial movement of the tubing 102 .

[0020] In the flow position, the flow path defined in the tubing 102 is unobstructed, allowing for flow of the medical fluid. In some embodiments, the pincher surface 142 of the pincher 140 is spaced apart from the portion of the tubing 102 disposed in the pincher recess 116. As shown, the pincher 140 is rotated away from the tubing 102 disposed in the pincher recess 116. As described herein, the pincher 140 can rotate on a guide pin 144 that is disposed in a guide slot 122 formed in a base extension 120 of the flow stop base 110. As shown, the base extension 120 extends away from the pincher recess 116 of the flow stop base 110. In some cases, the pincher 140 can translate further along the guide slot 122. In some embodiments, the geometry of the guide slot 122 can determine the range of allowable travel of the pincher 140.

[0021] In the illustrated example, the pincher 140 may be actuated or rotated by a mechanical or planar linkage (e.g., a three bar linkage or a four bar linkage, etc.). As illustrated, the pincher 140 may be actuated by rotating or translating the rocker 130. The rocker 130 may be rotatably coupled to the base extension 120 of the flow stop base 110. As illustrated, the rocker 130 may rotate about a rocker pivot 132 that rotatably couples the rocker 130 to the base extension 120. When the rocker 130 is rotated, the rocker 130 may actuate the pincher 140, causing it to rotate and / or translate. In some embodiments, the rocker 130 may be rotatably coupled to the pincher 140 at the pincher link 134. During operation, the rocker 130 may be actuated by the clinician, causing it to actuate or rotate the pincher 140.

[0022] 2 is a reverse perspective view of the flow stop assembly 100 of FIG. 1 in a flow position, according to various embodiments of the present disclosure. During operation, rotation of the rocker 130 (and thus the pincher 140) may be limited to prevent damage to the tubing 102 or the flow stop assembly 100. In the example shown, the rocker 130 may include a clamping limit wall 136 that extends from the rocker 130 and engages the base extension 120 at a rotation limit. For example, the clamping limit wall 136 may be configured to engage the base extension 120 at a rotational position of the rocker 130 determined to effectively occlude or clamp the tubing 102 without damaging the tubing 102. Additionally, the clamping limit wall 136 may provide tactile and / or auditory feedback to the clinician.

[0023] FIGURE 3 is a perspective view of flow stop assembly 100 in an occluded position according to various embodiments of the present disclosure. FIGURE 4 is an elevational view of flow stop assembly 100 of FIGURE 3 in an occluded position according to various embodiments of the present disclosure. With reference to FIGURES 3 and 4, in an occluded position or configuration, flow stop assembly 100 is capable of occluding the flow of medical fluid through tubing 102. Advantageously, flow stop assembly 100 may be utilized to occlude the flow of medical fluid during an injection procedure or any other suitable procedure.

[0024] In the example shown, the pincher 140 is actuated to engage the pincher surface 142 against the tubing 102 and fold the tubing 102 into the folded position 104 over the pincher protrusion 118 formed in the pincher recess 116. As shown, the pincher protrusion 118 extends from the base wall 111. By folding or kinking the tubing 102 over the pincher protrusion 118, the flow in the tubing 102 is occluded or blocked, which can limit or stop the fluid flow through the tubing 102.

[0025] During operation, the pinchers 140 are rotated or otherwise actuated into place to move from the flow position to the occluded position. When the pincher surfaces 142 engage the tubing 102, the pincher guard 114, base wall 111, and / or tubing guide 112 defining the pincher recess 116 prevent undesired radial movement of the tubing 102 during engagement.

[0026] In some embodiments, the rocker 130 is rotated to rotate and / or translate the pinchers 140 to the closed position. As shown, the rocker 130 is rotated into alignment with the base extension 120, rotating the pinchers 140 towards the pincher recesses 116 and folding the tubing 102 over the pincher protrusions 118. Advantageously, by utilizing the rocker 130 or linkage, the clinician can easily fold the tubing 102 over the pincher protrusions 118 with minimal force.

[0027] 5 is a perspective view of a flow stop assembly 200 in a flow position according to various embodiments of the present disclosure. In the example shown, the flow stop assembly 200 utilizes a translating or sliding pincher 240 to collapse or occlude the tubing 202.

[0028] During operation, the pincher 240 can slide from a flow position to a closed position, in which the pincher surface 242 of the pincher 240 can engage the tubing 202 and collapse the tubing 202 over the pincher protrusion 218, as described herein.

[0029] In some embodiments, the pinchers 240 can utilize a linkage to translate the pinchers 240 from a flow position to a blocked position. For example, the flow stop assembly 200 can utilize a four bar linkage to actuate the pinchers 240. In the example shown, the pinchers 240 can be constrained from translational movement.

[0030] As shown, the crank 230 and rocker 250 can cooperatively enable translation of the pincher 240. In some embodiments, the crank 230 is rotatably coupled to the base extension 220 of the flow stop base 210. As shown, the crank 230 can rotate about a crank pivot 232, which rotatably couples the crank 230 to the base extension 220. When the crank 230 is rotated, the crank 230 can actuate the rocker 250. In some embodiments, the crank 230 can be rotatably coupled to the rocker 250 at a rocker link 234. In the example shown, rotation of the crank 230 can actuate or otherwise rotate the rocker 250. During operation, the cooperative rotation of the crank 230 and rocker 250 provides a translational force to the pincher 240, causing the pincher 240 to translate as desired.

[0031] During operation, rotation of the crank 230, and therefore translation of the pincher 240, may be limited to prevent damage to the tubing 202 or the flow stop assembly 200. In the example shown, the crank 230 may include a clamping limit wall 236 that may extend from the crank 230 and engage the base extension 220 at a rotation limit. For example, the clamping limit wall 236 may be configured to engage the base extension 220 at a rotational position of the crank 230 determined to effectively occlude or clamp the tubing 202 without damaging the tubing 202. Additionally, the clamping limit wall 236 may provide tactile and / or auditory feedback to the clinician.

[0032] 6 is a perspective view of a flow stop assembly 300 according to various embodiments of the present disclosure. In the example shown, the flow stop assembly 300 utilizes a rotating cam or pincher 340 to collapse or occlude the tubing.

[0033] During operation, the pincher 340 can rotate and / or slide from a flow position to a blocked position, in which the pincher surface 342 of the pincher 340 can engage the tubing (not depicted) and collapse the tubing over the pincher protrusion 318 as described herein.

[0034] In some embodiments, the pinchers 340 utilize a cam mechanism to rotate the pinchers 340 from a flow position to an occluded position. In the example shown, the pinchers 340 are capable of rotating and / or translating.

[0035] As shown, the crank portion 330 and rocker 350 of the pincher 340 can cooperatively enable translation of the pincher 340. In some embodiments, the crank portion 330 rotatably couples the pincher 340 to the base extension 320 of the flow stop base 310. As shown, the crank portion 330 can rotate about a crank pivot 332 that rotatably couples the pincher 340 to the base extension 320. When the crank portion 330 is rotated, the pincher 340 can actuate the rocker 350. In some embodiments, the pincher 340 can have a cam surface disposed opposite the pincher surface 342 that engages with a cam surface of the rocker 350 such that rotation of the pincher 340 can actuate or otherwise rotate the rocker 350. During operation, the cooperative rotation of the pincher 340 and rocker 350 provides a translational force to the pincher 340, causing it to translate as desired.

[0036] During operation, rotation of crank portion 330, and therefore translation of pincher 340, may be limited to prevent damage to the tubing or flow stop assembly 300. In the example shown, pincher 340 may include a clamping limit wall 336 that extends from crank portion 330 and engages cap 314 at a rotation limit. For example, clamping limit wall 336 may be configured to engage cap 314 at a rotational position of pincher 340 determined to effectively occlude or clamp the tubing without damaging the tubing. Additionally, clamping limit wall 336 and cap 314 may provide tactile and / or auditory feedback to the clinician.

[0037] Optionally, the cap 314 can be disposed over the pincher 340 and / or the rocker 350 to at least partially cover the components of the flow stop assembly 300. In some embodiments, a pincher guard or upper tubing guide 312 formed through the cap 314 can hold and / or align the tubing passing through the flow stop assembly 300 and function as a pincher guard as described with respect to other embodiments described herein. As shown, the upper tubing guide 312 can be a tubular protrusion or cylindrical member that extends axially from the cap 314 and forms a partial sleeve around the tubing. The upper tubing guide 312 can prevent lateral or radial movement of the tubing during operations (including pinching or occlusion operations). The upper tubing guide 312 can be sized to prevent radial movement of the tubing while allowing axial movement of the tubing.

[0038] 7 is a perspective view of a flow stop assembly 400 according to various embodiments of the present disclosure. In the example shown, the flow stop assembly 400 utilizes a rotating pincher 440 to collapse or occlude the tubing.

[0039] During operation, the pincher 440 can rotate from a flow position to a blocked position, in which the pincher surface 442 of the pincher 440 can engage the tubing (not depicted) and collapse the tubing over the pincher protrusion 418 as described herein.

[0040] In some embodiments, the pincher 440 is rotatably coupled to the base extension 420 of the flow stop base 410. As shown, the pincher 440 can rotate about a pivot 432, allowing the pincher surface 442 to travel along an arc. During operation, the rotation of the pincher 440 about the pivot 432 can provide a mechanical advantage to the clinician.

[0041] During operation, rotation of the pincher 440 may be limited to prevent damage to the tubing or flow stop assembly 400. In the example shown, the pincher 440 may include a clamping limit wall 436 that extends from the pincher 440 and engages the cap 414 at a rotation limit. For example, the clamping limit wall 436 may be configured to engage the cap 414 at a rotational position of the pincher 440 determined to effectively occlude or clamp the tubing without damaging the tubing. Additionally, the clamping limit wall 436 and the cap 414 may provide tactile and / or auditory feedback to the clinician.

[0042] Optionally, the cap 414 can be disposed over the pincher 440 to at least partially cover and / or retain components of the flow stop assembly 400. In some embodiments, a pincher guard or upper tubing guide 412 formed through the cap 414 can retain and / or align tubing passing through the flow stop assembly 400 and function as a pincher guard as described with respect to other embodiments described herein. As shown, the upper tubing guide 412 can be a tubular protrusion or cylindrical member that extends axially from the cap 414 and forms a partial sleeve around the tubing. The upper tubing guide 412 can prevent lateral or radial movement of the tubing during operations (including pinching or occlusion operations). The upper tubing guide 412 can be sized to prevent radial movement of the tubing while allowing axial movement of the tubing.

[0043] Optionally, the flow stop assembly 400 can include a tubing coupler 413 that is held and aligned within the pincher recess 416. During operation, a portion of tubing can be fluidly coupled to the tubing coupler 413 to allow fluid communication therethrough. As can be appreciated, flow through the tubing coupler 413 can be stopped by a pinching or occlusion action, as described herein. Advantageously, by coupling the tubing to the tubing coupler, aligning and / or positioning the tubing within the flow stop assembly 400 can be simplified.

[0044] This disclosure is provided to enable any person skilled in the art to practice the various aspects described herein. This disclosure provides various examples of the subject technology, and the subject technology is not limited to these examples. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects.

[0045] Reference to an element in the singular is not intended to mean "the only one" unless specifically so stated, but rather "one or more." The term "several" refers to "one or more" unless specifically stated otherwise. Masculine pronouns (e.g., his) include feminine and neuter (e.g., "her" and "it"), and vice versa. Headings and subheadings (if any) are used merely for convenience and do not limit the invention.

[0046] The word "exemplary" is used herein to mean "serving as an example or illustration." Any aspect or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs. In one aspect, various alternative configurations and operations described herein may be considered at least equivalent.

[0047] A phrase such as "aspect" does not imply that such aspect is essential to the subject technology or that such aspect applies to all configurations of the subject technology. A disclosure of an aspect can apply to all configurations, or to one or more configurations. An aspect may provide one or more examples. A phrase such as an aspect may refer to one or more aspects, and vice versa. A phrase such as "embodiment" does not imply that such an embodiment is essential to the subject technology or that such an embodiment applies to all configurations of the subject technology. A disclosure of an embodiment can apply to all embodiments, or to one or more embodiments. An embodiment may provide one or more examples. A phrase such as an embodiment may refer to one or more embodiments, and vice versa. A phrase such as "configuration" does not imply that such a configuration is essential to the subject technology or that such a configuration applies to all configurations of the subject technology. A disclosure of a configuration can apply to all configurations, or to one or more configurations. A configuration may provide one or more examples. Any reference to such a configuration may refer to one or more configurations, and vice versa.

[0048] In one aspect, unless otherwise stated, all measurements, values, ratings, positions, dimensions, sizes, and other specifications set forth in this specification (including the claims which follow) are approximate and not precise, and in one aspect, they are intended to have a reasonable range consistent with the functions to which they relate and functions customary in the art to which they pertain.

[0049] In one embodiment, a term such as "coupled" may refer to a direct connection. In another embodiment, a term such as "coupled" may refer to an indirect connection.

[0050] Terms such as "top," "bottom," "front," and "rear," when used in this disclosure, should be understood to refer to any frame of reference, rather than the usual gravitational frame of reference. Thus, top, bottom, front, and rear surfaces can extend upwards, downwards, diagonally, or horizontally in the gravitational frame of reference.

[0051] Various items may be arranged differently (e.g., placed in a different order or partitioned in a different manner), all without departing from the scope of the subject technology. All structural and functional equivalents to the elements of the various embodiments described throughout this disclosure that are known or that later become known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be made available to the public, regardless of whether such disclosure is expressly set forth in the claims. An element of a claim is not to be construed under the provisions of 35 U.S.C. 112, sixth paragraph, unless the element is expressly recited using the phrase "means for" or, in the case of a method claim, unless the element is recited using the phrase "step for." Moreover, to the extent terms such as "include" or "having" are used, such terms are intended to be inclusive in the same manner as the term "comprise" is interpreted when used as a transitional phrase in the claims.

[0052] The title, background, summary, brief description of the drawings, and abstract of this disclosure are hereby incorporated into this disclosure and are provided as examples for purposes of illustrating this disclosure, not as limiting descriptions. They are submitted with the understanding that they will not be used to limit the scope or meaning of the claims. In addition, it can be understood that in the detailed description, the description provides examples for illustrative purposes, and that various features have been grouped together in various embodiments for the purpose of streamlining the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the claimed subject matter requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed structure or operation. The following claims are hereby incorporated into the detailed description, with each claim standing on its own as a separate claimed subject matter.

[0053] The claims are not intended to be limited to the embodiments described herein, but are to be accorded full scope consistent with the language of the claims and to encompass all legal equivalents. Nonetheless, none of the claims are intended to encompass subject matter that fails to meet the requirements of 35 U.S.C. §§ 101, 102, or 103, nor should they be so interpreted.

Claims

1. 1. A flow stop assembly configured to control flow through tubing, the flow stop assembly comprising: Flow stop base; Pincher and; Lockers and Including, The flow stop base is a base wall extending from the flow stop base; at least one pincher guard, the at least one pincher guard configured to be disposed about the tubing; a tubing guide configured to receive the tubing, the at least one pincher guard and the tubing guide being axially spaced apart and configured to axially align the tubing through the flow stop base; a pincher recess defined between the base wall, the at least one pincher guard, and the tubing guide; a pincher protrusion disposed within the pincher recess and configured to abut the tubing, the pincher protrusion extending from the base wall; a base extension extending away from the pincher recess, the base extension defining a guide slot; Including, the pincher is movable relative to the base extension and includes a pincher surface and a guide pin extending through the guide slot, the pincher configured to move between a flow position and a blocked position, in the flow position the pincher surface is spaced apart from the pincher protrusion, and in the blocked position the pincher surface is disposed adjacent to the pincher protrusion and configured to obstruct flow through the tubing; A flow stop assembly, wherein the rocker is rotatably connected to the base extension and the pincher, rotation of the rocker moves the pincher, and the pincher is rotatable about the rocker at a first axis of rotation and about the guide pin at a second axis of rotation different from the first axis of rotation.

2. The flow stop assembly of claim 1 , wherein the rocker includes a clamping limit wall extending therefrom, the clamping limit wall configured to limit rotation of the rocker.

3. The flow stop assembly of claim 1 , wherein rotation of the rocker rotates the pincher.

4. The flow stop assembly includes: a crank rotatably coupled to the base extension and the rocker, wherein rotation of the crank moves the pinchers; The flow stop assembly of claim 1 further comprising:

5. 5. The flow stop assembly of claim 4, wherein the crank includes a clamping limit wall extending therefrom, the clamping limit wall configured to limit rotation of the crank and movement of the pincher.

6. 1. A flow stop assembly, comprising: tubing defining a flow path; Flow stop base; Pincher and; Lockers and Including, The flow stop base is a base wall extending from the flow stop base; at least one pincher guard, the at least one pincher guard being disposed about the tubing; a tubing guide configured to receive the tubing, the at least one pincher guard and the tubing guide being axially spaced apart and configured to axially align the tubing through the flow stop base; a pincher recess defined between the base wall, the at least one pincher guard, and the tubing guide, the tubing extending through the pincher recess; a pincher protrusion disposed in the pincher recess adjacent the tubing, the pincher protrusion extending from the base wall; a base extension extending away from the pincher recess, the base extension defining a guide slot; Including, the pincher is rotatable relative to the base extension and includes a pincher surface and a guide pin extending through the guide slot, the pincher configured to move between a flow position and a blocked position, in the flow position the pincher surface is spaced apart from the tubing, and in the blocked position the pincher surface engages the tubing and folds the tubing over the pincher protrusion to obstruct a flow path of the tubing; A flow stop assembly, wherein the rocker is rotatably connected to the base extension and the pincher, rotation of the rocker moves the pincher, and the pincher is rotatable about the rocker at a first axis of rotation and about the guide pin at a second axis of rotation different from the first axis of rotation.

7. The flow stop assembly of claim 6 , wherein the rocker includes a clamping limit wall extending therefrom, the clamping limit wall configured to limit rotation of the rocker.

8. The flow stop assembly of claim 6 , wherein rotation of the rocker rotates the pinchers.

9. The flow stop assembly includes: a crank rotatably coupled to the base extension and the rocker, wherein rotation of the crank translates the pinchers; The flow stop assembly of claim 6 further comprising:

10. 10. The flow stop assembly of claim 9, wherein the crank includes a clamping limit wall extending therefrom, the clamping limit wall configured to limit rotation of the crank and translation of the pincher.

11. providing a fluid flow through tubing, the tubing extending through a flow stop base defining a guide slot; rotating a rocker rotatably coupled to the flow stop base and actuating pinchers against the tubing to fold the tubing over pincher protrusions, the pinchers being rotatable about the rocker at a first axis of rotation and rotatable about the guide slot at a second axis of rotation different from the first axis of rotation; interrupting the fluid flow through the tubing; A method comprising:

12. The method of claim 11 , further comprising rotating the pinchers to engage against the tubing.

13. The method of claim 11 , further comprising sliding the pinchers into engagement against the tubing.

14. The method of claim 11 , further comprising limiting a range of motion of the pinchers.

15. A flow stop assembly as described in claim 1, wherein the pincher is translatable relative to the guide slot.

16. A flow stop assembly as described in claim 6, wherein the pincher is translatable relative to the guide slot.

17. The method of claim 11, further comprising translating the pincher relative to the guide slot.

18. A flow stop assembly configured to control flow through tubing, the flow stop assembly comprising: Flow stop base; Pincher and Including, The flow stop base is a base wall extending from the flow stop base; at least one pincher guard, the at least one pincher guard configured to be disposed about the tubing; a tubing guide configured to receive the tubing, the at least one pincher guard and the tubing guide being axially spaced apart and configured to axially align the tubing through the flow stop base; a pincher recess defined between the base wall, the at least one pincher guard, and the tubing guide; a pincher protrusion disposed within the pincher recess and configured to abut the tubing, the pincher protrusion extending from the base wall; a base extension extending away from the pincher recess; Including, the pincher is movable relative to the base extension and includes a pincher surface, the pincher configured to move between a flow position and a blocked position, in the flow position, the pincher surface is spaced apart from the pincher protrusion, and in the blocked position, the pincher surface is disposed adjacent to the pincher protrusion and configured to obstruct flow through the tubing; The flow stop assembly includes: a crank rotatably coupled to the base extension and the rocker, wherein rotation of the crank moves the pinchers; Further comprising: The crank includes a clamping limit wall extending from the crank, the clamping limit wall configured to limit rotation of the crank and movement of the pincher.

19. A flow stop assembly, comprising: tubing defining a flow path; Flow stop base; Pincher and Including, The flow stop base is a base wall extending from the flow stop base; at least one pincher guard, the at least one pincher guard being disposed about the tubing; a tubing guide configured to receive the tubing, the at least one pincher guard and the tubing guide being axially spaced apart and configured to axially align the tubing through the flow stop base; a pincher recess defined between the base wall, the at least one pincher guard, and the tubing guide, the tubing extending through the pincher recess; a pincher protrusion disposed in the pincher recess adjacent the tubing, the pincher protrusion extending from the base wall; a base extension extending away from the pincher recess; Including, the pincher is rotatable relative to the base extension and includes a pincher surface, the pincher being configured to move between a flow position and a blocked position, in the flow position the pincher surface is spaced apart from the tubing, and in the blocked position the pincher surface engages the tubing and folds the tubing over the pincher protrusion to obstruct a flow path of the tubing; The flow stop assembly includes: a rocker rotatably coupled to the base extension and the pincher, wherein rotation of the rocker moves the pincher; Further comprising: The flow stop assembly includes: a crank rotatably coupled to the base extension and the rocker, wherein rotation of the crank translates the pinchers; Further comprising: The crank includes a clamping limit wall extending from the crank, the clamping limit wall configured to limit rotation of the crank and translation of the pincher.

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