Patent Publication Number: US-2021169731-A1

Title: Stimulation device having a pressure field stimulator and a roller massager

Description:
The present patent document is a continuation of U.S. patent application Ser. No. 16/569,720, filed Sep. 13, 2019, entitled “STIMULATION DEVICE HAVING A PRESSURE FIELD STIMULATOR AND ROLLER MASSAGER”, the disclosure of which is incorporated herein by reference. 
    
    
     FIELD 
     The invention relates to stimulation devices, and more particularly to a device including a pressure field stimulator and a roller massager. 
     BACKGROUND 
     There are various devices available for sexual stimulation. For female bodies, they are typically configured to stimulate the clitoris and/or the Grafenberg Spot (the “G-spot”). The “G-spot” is a nerve reflex area inside the vagina along the anterior surface. The glans clitoris is a portion of the clitoris that is on the vulva, external to the vagina. The glans clitoris has thousands of nerve endings, and the vulva is sexually responsive. Stimulation of a person&#39;s glans clitoris or G-spot increases blood flow to the area and provides sexual pleasure. The prostate, which is sexually responsive, is a gland surrounding the neck of the bladder in male bodies. Products for G-spot or prostate massage are entirely manually operated, or are provided with internal motors that achieve stimulation by shape, texture and vibration. There exists a need for improvements in devices for stimulation of the clitoris, G-spot and the prostate. 
     SUMMARY 
     Embodiments of the invention relate to a device including a pressure field stimulator and a roller massager. The pressure field stimulator has a cup and a driver, where the driver is configured to vary a volume of the cup. The roller massager comprises a roller, disposed on a threaded post. In some embodiments, an enclosure is disposed around the threaded post where the enclosure includes an opening through which the roller protrudes. The threaded post is mechanically coupled to a motor. A sheath is tightly bound to the enclosure such that the roller presses on the sheath. 
     In some embodiments, there is provided a device comprising: a pressure field stimulator; and a roller massager comprising: a flexible sheath; and a roller disposed adjacent the flexible sheath. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the present teachings and together with the description, serve to explain the principles of the present teachings. 
         FIG. 1A  is a perspective view of an example cup in accordance with some embodiments of the present invention. 
         FIG. 1B  is a front view of the cup of  FIG. 1A . 
         FIG. 1C  is a side view of the cup of  FIG. 1A . 
         FIG. 1D  shows a rear view of the cup of  FIG. 1A . 
         FIG. 1E  is a bottom-up view of the cup of  FIG. 1A . 
         FIG. 2A  is a side view of an embodiment  200  of example cup and example driver assembly in accordance with some embodiments of the present invention where the buckle region wall  130  is in default position. 
         FIG. 2B  is a front view of the cup and driver assembly in accordance with some embodiments of the present invention where the buckle region wall  130  is in default position. 
         FIG. 2C  is a bottom view of the cup and driver assembly in accordance with some embodiments of the present invention. 
         FIG. 2D  is a perspective view of the cup and driver assembly in accordance with some embodiments of the present invention. 
         FIG. 3A  shows an example motion sequence cycle for some embodiments of the present invention at t=t 0 . 
         FIG. 3B  shows an example motion sequence cycle for some embodiments of the present invention at t=t 1 . 
         FIG. 3C  shows an example motion sequence cycle for some embodiments of the present invention at t=t 2   
         FIG. 3D  shows an example motion sequence cycle for some embodiments of the present invention at t=t 3 . 
         FIG. 3E  is a top-down view of the cup as shown the uncompressed configuration of  FIG. 3A . 
         FIG. 3F  is a top-down view of the cup as shown the compressed configuration of  FIG. 3B . 
         FIG. 4  shows a cross-section of an embodiment of the invention including a cup and a driver installed into a housing. 
         FIG. 5A  shows a cross-section diagram of a cup and plate assembly in default position against skin of a user. 
         FIG. 5B  shows a cross-section diagram of a cup and plate assembly of  FIG. 5A  in compressed position against skin of a user. 
         FIG. 6A  shows a side view of an alternative driver and cup assembly. 
         FIG. 6B  shows a front view of an alternative driver and cup assembly. 
         FIG. 7A  show details of another embodiment where the cup at V 1  is in a partially compressed position. 
         FIG. 7B  shows details of the embodiment of  FIG. 7A  where the cup at V 2 . 
         FIG. 7C  shows details of the embodiment of  FIG. 7A  where the cup is at V 1  in a position “mirroring” the position at  FIG. 7A . 
         FIG. 8  shows is a time-pressure graph showing the time-pressure relationship of the cam of  FIG. 3A-3D . 
         FIG. 9A  shows an embodiment of the present invention, in accordance with another cycle, where the volume of the cup is at V 1 . 
         FIG. 9B  shows the embodiment of  FIG. 9A  where the cam has rotated. 
         FIG. 9C  shows the embodiment of  FIG. 9B  where the volume of the cup is V 2 . 
         FIG. 10  shows a pressure curve over time graph  1000  for the embodiment shown in  FIGS. 9A-9C . 
         FIG. 11A  shows an example apparatus and cycle for embodiments of the present invention utilizing both positive and negative pressure with respect to a reference pressure, at start time. 
         FIG. 11B  shows the embodiment of  FIG. 11A  where the cam has rotated. 
         FIG. 11C  shows the embodiment of  FIG. 11A  where the cam has rotated further from the point shown in  FIG. 11B . 
         FIG. 12  shows a pressure curve for the embodiment shown in  FIGS. 11A-11C . 
         FIG. 13A  shows an embodiment having a pressure field stimulator affixed to a first end of a flexible arm and a roller massager affixed to a second end of the flexible arm. 
         FIG. 13B  is a front view showing details of an example roller massager of  FIG. 13A . 
         FIG. 13C  is a front view showing detail of the roller massager of  FIG. 13A . 
         FIG. 13D  is a front view of the roller massager of  FIG. 13A  in accordance with embodiments of the present invention showing detail of the enclosure upper portion. 
         FIG. 13E  is a view showing additional details of the roller massager of  FIG. 13A  in accordance with embodiments of the present invention. 
         FIG. 13F  is a side view showing additional detail of the roller massager of  FIG. 13A  in accordance with embodiments of the present invention. 
         FIG. 13G  is a side view showing detail of the roller massager of  FIG. 13A  with start range and end range positions depicted in accordance with some embodiments of the present invention. 
         FIG. 13H  shows a view of a portion of the roller massager of  FIG. 13A  having a tapered threaded post. 
         FIG. 14A  shows a front perspective view of a stimulation device in accordance with some embodiments of the present invention. 
         FIG. 14B  shows a rear perspective view of the device of  FIG. 14A . 
         FIG. 15A  shows an embodiment of the invention wherein the shaft and base are connected via a flexible arm, without a silicone layer and out sheath thereon for clarity. 
         FIG. 15B  shows the arm of  FIG. 15A  with the silicone layer and outer sheath thereon. 
         FIG. 16  shows an example of an arm which is not adjustable. 
         FIG. 17  is a block diagram of an embodiment of a stimulation device of the present invention. 
         FIG. 18  is an exemplary user interface in accordance with additional embodiments of the present invention. 
         FIG. 19A  shows an embodiment positioned on a user&#39;s vagina. 
         FIG. 19B  shows the device with shaft positioned further into the vagina. 
         FIG. 20  shows a cutaway view of a portion of an alternative embodiment of the roller massager of the present invention including a plurality of rollers. 
         FIG. 21  shows a cutaway view of another alternative embodiment including a vibrator. 
         FIG. 22  shows an embodiment where threaded post has one or more flattened portions of the threads. 
         FIG. 23A  shows a diagram of planes of the second stimulator of some embodiments of the present invention. 
         FIG. 23B  shows a diagram of how portions of the opening of the enclosure may be narrower in some areas than in others to achieve a desired plane of the roller protruding therefrom. 
         FIG. 24  is a front view of a portion of a roller massager device in accordance with alternative embodiments of the present invention, without an outer sheath thereon. 
         FIG. 25A  shows a top-down view of a sheath that is disposed over the device. 
         FIG. 25B  shows a bottom-up view of a sheath that is disposed over the device. 
         FIG. 26  shows a partial view of the internal components of a base including a pressure field stimulator in accordance with some embodiments of the invention. 
     
    
    
     The drawings are not necessarily to scale. The drawings are merely representations, not necessarily intended to portray specific parameters of the invention. The drawings are intended to depict only example embodiments of the invention, and therefore should not be considered as limiting in scope. In the drawings, like numbering may represent like elements. Furthermore, certain elements in some of the figures may be omitted, or illustrated not-to-scale, for illustrative clarity. 
     DETAILED DESCRIPTION 
     Embodiments of the invention relate to a device including a pressure field stimulator and a roller massager. The pressure field stimulator has a cup and a driver, where the driver is configured to vary a volume of the cup. The roller massager comprises a roller, disposed on a threaded post. In some embodiments, an enclosure is disposed around the threaded post where the enclosure includes an opening through which the roller protrudes. The threaded post is mechanically coupled to a motor. A sheath is tightly bound to the enclosure such that the roller presses on the sheath. 
     Reference throughout this specification to “one embodiment,” “an embodiment,” “some embodiments”, “embodiments,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment,” “in an embodiment,” “in some embodiments”, “in embodiments,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment. 
     Moreover, the described features, structures, or characteristics of the invention may be combined (“mixed and matched”) in any suitable manner in one or more embodiments. It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope and purpose of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. Reference will now be made in detail to the preferred embodiments of the invention. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. As used herein, the singular forms “a”, “an”, and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the use of the terms “a”, “an”, etc., do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items. The term “set” is intended to mean a quantity of at least one. It will be further understood that the terms “comprises” and/or “comprising”, or “includes” and/or “including”, or “has” and/or “having”, when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, and/or elements. 
     For the purposes of disclosure, the word, “substantially” is defined as “for the most part”. It means “to a great extent,” but having some room for some minor variation. 
     Throughout this disclosure, a legend “L” is used to indicate orientation of the various views of disclosed embodiments with respect to an X, Y, and Z axis. 
       FIG. 1A  is a perspective view of an example cup  102  in accordance with some embodiments of the present invention. Cup  102  includes a cavity  106 . In some embodiments, cavity  106  is sized and configured to fit over a region of skin of a user&#39;s body. In some embodiments, the cavity is sized and configured to fit over the region of skin on a vulva surrounding a glans clitoris of a user. Cavity  106  has a rim  108  defining an opening  110  of the cavity. Cavity  106  is defined by an interior lateral wall  112  and a base  114  (bottom in the orientation shown). The lateral wall  112  and base  114  may together be a single continuous substantially-rounded concave wall, or may include edges between flat surfaces. The cavity  106  may be any suitable shape. In some embodiments, cavity  106  is oval in shape as shown here. In some embodiments, lateral wall  112  and base  114  are comprised of a single continuous material with the cup  102 . The cup  102  (and, therefore, cavity lateral wall  112  and base  114 ) is preferably comprised of a non-permeable flexible resilient material. In some embodiments, the flexible resilient material has a Shore durometer value ranging from A5 to D60. In some embodiments, the flexible resilient material has a Shore durometer value ranging from A10 to D40. In some embodiments, the cup is comprised of silicone. In some embodiments, the cup is comprised of rubber, TPE, plastic, or other suitable material. 
     The cup&#39;s cavity  106  is adapted such that when rim  108  is placed on the skin of a user with the opening  110  over the area to be stimulated, a chamber filled with air is formed among the cavity walls  112 , base  114 , and the user&#39;s skin. The chamber is preferably sealed or substantially-sealed. Note that although herein, a “chamber” is referred to, in some embodiments, the chamber is comprised of several separate but connected compartments, such that air can flow between the compartments. Accordingly, the use of the word “chamber” in the singular is not meant to exclude split-chamber or multi-chamber configurations. “Pressure” as used herein refers to air pressure. 
     In some embodiments, the cup  102  additionally has a wing region formed thereon. There may be side wings  118   a,    118   b  on each side of the cup  102 , as well as a front wing  118   c.  In use for stimulation of a vulva, front wing  118   c  extends under the labia and under the mons pubis of a user to assist in holding the cup  102  to the skin of the user. This creates an improved seal of the chamber. Side wings  118   a  and  118   b  make contact with the labia during use for an improved seal and stimulation of the labia. Some embodiments may further include a basin  151  for improved seal. 
       FIG. 1B  shows a front of the cup  102  of  FIG. 1A . In this view, the wing regions  118   a,    118   b,  and  118   c  are prominently shown. A buckle region wall  130  and an anchor wall  171  of cup  102  are each in view. The buckle region wall  130  compresses and uncompresses (i.e. expands) during operation of the pressure field stimulation device, resulting in a variable volume of the cavity  106  ( FIG. 1 ) of cup  102 . The anchor wall  171  serves as an anchor for the buckling of the buckle region wall  130 . The buckle region wall  130  forms a resilient protrusion  159  that extends from the underside (floor)  147  of the anchor wall  171  of the cup  102 . 
       FIG. 1C  is a side view of the cup  102  of  FIG. 1A . The opposite side of the cup  102  looks symmetrical in embodiments. The buckle region wall  130  forms a resilient protrusion  159 , which is the buckle region, that extends from the underside  147  ( FIG. 1B ) of the anchor wall  171  of cup  102 . 
       FIG. 1D  shows a rear view of the cup  102  of  FIG. 1A . The buckle region wall  130  is in view with exterior first edge  139  and a second edge  137 . First edge  139  is an upper exterior edge and second edge is a lower exterior edge shown (“exterior” is only used to denote that these edges are on the exterior of the cup, rather than interiorly inside the cavity). “Upper” and “lower” are used in description of the orientation shown, and not meant to be limiting. Buckle region wall  130  protrudes from the underside surface  147  of the anchor wall  171  of cup  102 , and forms the protrusion  159 . Anchor wall  171  has a wall thickness larger than the wall thickness of buckle region wall  130 . 
       FIG. 1E  is a bottom-up view of the cup  102  of  FIG. 1A . The buckle region is in view with the first edge  139  and the second edge  137  shown. A reveal R between edges  137  and  139  is configured to assist the buckle wall region in buckling under a compression force (also referred to herein interchangeably with “push force”) from a driver. The buckling of buckle region wall  130  typically occurs prior to any warping of anchor wall  171 . In some embodiments, the anchor wall  171  does not buckle or warp. In some embodiments, the anchor wall  171  does not substantially buckle or warp. 
     The reveal R is the difference in the X and Y dimensions, between the edge  137  and the edge  139 , also as indicated in  FIG. 1B ,  FIG. 1C , and  FIG. 1D . In the embodiment shown, R is equal around the perimeters of edges  137  and  139 . In other embodiments, R could have some irregularities. 
     In some embodiments, the buckle region wall  130  is concave in shape on its exterior surface. Thus, in some embodiments, the buckle region wall  130  has a concave exterior surface. In some embodiments, the first edge  139  is of a larger perimeter than the second edge  137 . This creates the reveal R. In embodiments, the ovular shape outlined by the second edge  137  is oriented concentrically with respect to the ovular shape outlined by the first edge  139 . In some embodiments, the buckle region  130  is formed with an ovular shape as shown in  FIG. 1E . In some embodiments, the buckle region wall  130  is of a shape other than an oval. Any suitable shape is included within the scope of the invention. 
     The buckle wall region  130 , with reveal R, is also configured such that it will spring back out to default (i.e. extended/relaxed) position when the compression force is removed. The buckle region wall  130  is made of a material that, when the second edge  137  is compressed towards the first edge  139  by a force of a mechanical member such as a cam of a driver, and then the force is subsequently removed from the second edge  137 , the buckle region wall  130  quickly/abruptly returns to its default position (expanded position) with a spring-like motion. The buckle region behaves similar to a spring having a spring constant that causes the buckle region wall to abruptly return to its default position once the driver force is removed. 
     The cup  102  (and, therefore its components, including the cavity lateral wall  112 , base  114 , and buckle region  130 ) is preferably comprised of a non-permeable flexible resilient material. In some embodiments, the flexible resilient material has a Shore durometer value ranging from A5 to D60. In some embodiments, the flexible resilient material has a Shore durometer value ranging from A10 to D40. In some embodiments, the cup material is comprised of silicone. In some embodiments, the cup is comprised of rubber, TPE, plastic, or other suitable material. The material may be any elastomeric material. 
       FIG. 2A  is a side view of an embodiment  200  of example cup and driver assembly in accordance with some embodiments of the present invention where the buckle region wall  130  is in default position.  FIG. 2B  is a front view of the cup and driver assembly in accordance with some embodiments of the present invention where the buckle region wall  130  is in default position.  FIG. 2C  is a bottom view of the cup and driver assembly in accordance with some embodiments of the present invention.  FIG. 2D  is a perspective view of the cup and driver assembly in accordance with some embodiments of the present invention. 
     Referring now to  FIGS. 2A-2D , there is shown a driver assembly  239  comprising a plate  140 , a cam  150 , and a motor  144 . In embodiments, there is a cam  150  disposed adjacent to the plate  140 . In the example, although the cam  150  and the plate  140  intermittently make contact with one another, they are not permanently connected to one another. In embodiments, the plate is disposed on an underside surface of the buckle region wall  130  of the cup. In embodiments, the driver also includes any additional mechanical coupling such as gears, pullies, shafts, and/or other devices to impart motion to components of the pressure field stimulation device. In some embodiments, the plate  140  is rigid, or substantially-rigid. It can have some flexibility, but must have a hardness such that the cam  150  can vary the position of the plate  140 . The hardness/flexibility of the cup as compared with that of the plate is such that when the cup puts a force on the plate, the plate does not flex. In some embodiments, the plate  140  is comprised of plastic, metal, silicone, and/or other suitable material. The cam  150  is rigid or substantially rigid such that it can apply a push force on the plate  140 . The push force is a force that can result in compression of a portion of the cup  102 , such as the buckle region wall  130  of the cup. In embodiments, the cam  150  is made of plastic, metal, or other suitable material. Driver  239  pushes plate  140  in a direction indicated by arrow C, reducing the volume of cavity  106 . The cavity  106  returns to default position in direction indicated by arrow D, increasing the volume of cavity  106 . 
     Plate  140  is in contact with an underside ( 157  of  FIG. 1E ) of buckle region wall  130 . Plate  140  may be adhered, welded, integral with, pinned, or otherwise connected with the underside of the cup. In the example, the plate  140  is substantially rigid, and comprised of plastic, metal, and/or other suitable material. In some embodiments, motor  144  is configured such that a motor shaft  146  is disposed within a motor shaft guide  148  (comprised of a flange on each side of the motor shaft  146 ). The shaft guide  148  keeps the alignment of the plate  140  above the cam  150 , ensuring that the force of the cam  150  is toward the plate  140 , minimizing force to the sides. A cam  150  is mechanically coupled to the motor  144  via shaft  146 . In some embodiments, the plate has a connected, integral, or monolithic cam strike  142 . The cam strike may be a protrusion from the plate, to which contact is made by the cam  150 . In some embodiments, a cam strike  142  is not present, and the cam  150  contacts a substantially flat portion of the underside of the plate  140 . 
     Referring to  FIG. 1E , in some embodiments, the underside wall  157  of protrusion  159  is rigid enough to function as the plate of the driver. Accordingly, the plate can be integral with the underside of the buckle region wall  130 . In such instances, the wall  157  may be a silicone of a Shore durometer value ranging from A20 to D60, while the buckle region wall  130  of the cup is resilient, being of a Shore durometer value ranging from A5 to D30. In some embodiments, a separate plate, such as  140  of  FIGS. 2A-2D or 740  of  FIG. 7A-7E , is connected to wall  157  on underside of buckle region wall  130 , so the wall  157  does not have to be rigid. 
     Referring now again to  FIG. 2A , during operation, the motor  144  rotates the cam  150 . During the rotation cycle, cam  150  makes intermittent contact with the plate  140 , which pushes plate  140  in direction C to cause compression of the buckle region wall  130  of cup  102 , bringing cavity  106  from a first volume (V 1 ) to a second volume (V 2 ). When the cam  150  continues to rotate, it eventually abruptly loses contact with the plate  140  (or cam strike  142 , if present). In order to abruptly remove the push force from the underside of the cup, the cam  150  rotates at a speed such that the contact edge of the cam  150  is moved away from the plate  140  faster than the buckle region wall  130  can spring back to its default position. During this time of non-contact, the buckle region  130  of cup  102  expands in direction D, or “springs” out, to the first volume (V 1 ). The expansion is due to the configuration of the buckle region wall  130  (without electrically-assisted pull or push). In some embodiments, the driver does not pull or push it to spring back. The volume of the cavity is varied as the buckle region wall  130  changes positions cyclically (i.e. repeatedly), creating a pressure field in the chamber. 
     Various settings are associated with corresponding speeds of the driver (e.g., rotations per minute of the cam). Accordingly, a user may choose that the pressure field stimulation device generate greater or lower pressure for their comfort level. The higher the speed, generally, the more intense the stimulation, and vis versa. The general amount of pressure generated by the pressure field stimulation device is calibrated (factory-settings). Preferably, at its lowest setting, the pressure generated is of an amount great enough that most people would be able to feel on their body when the cup is applied, and at its highest setting, low enough such that it would not usually hurt a body part when applied. In embodiments, a user may modify the strength of the pressure field via user input to a user interface. 
       FIGS. 3A-3D  show an example motion sequence cycle for some embodiments of the present invention similar to the embodiment of  FIGS. 2A-2D .  FIG. 3A  shows a starting position (before the cam begins to rotate) for the cam  150  at an initial time t=t 0 . As shown in  FIG. 3A , the high point  152  of cam  150  is oriented away from the plate  140 . The “high point” is the location of the cam farthest away from the point at which the cam is rotated by the motor shaft. Buckle region wall  130  is shown in a default position. The cavity of the cup  102  has a first volume (V 1 ). In operation, the starting position shown in  FIG. 3A  represents a maximum volume Vmax for an operational cycle. Accordingly, V 1 =Vmax. In the example, the cam  150  rotates in a direction indicated by arrow  166 . In some embodiments, the cam  150  may instead rotate in the opposite direction, the theory of operation is similar. 
       FIG. 3B , shows the cam  150  at an intermediate position at time t=t 1 . The cam  150  is rotated 180 degrees such that the high point  152  of cam  150  has pushed the plate  140  such that it has caused the buckle region wall  130  of the cup  102  to buckle, or compress in the cavity (e.g.,  106  of  FIG. 1A ), to a second volume (V 2 ), which is a minimum volume Vmin. 
       FIG. 3C , shows the cam  150  after a complete revolution of the cam  150  at time t=t 2 . The high point  152  has returned to the same position as it was in  FIG. 3A . However, the rotation speed of the cam  150  is sufficiently fast such that the buckle portion  130  of cup  102  has not yet expanded to its default position, creating a gap G between the plate  140  and the cam  150 . 
       FIG. 3D  shows the cup  102  at time t=t 3 , at which time the buckle region  130  has expanded back to the default state (also shown at  FIG. 3A ), moving the plate  140  towards the cam  150 . Therefore, at the end of the operational cycle, the volume of the cavity returns to V 1 , which is Vmax. Therefore, the buckle region  130  is configured such that it will return from V 2  to V 1  in time for the next strike of the cam  150  to plate  140  (in some cases, against the cam strike). 
     In some embodiments, the cavity returns from the second volume (V 2 ) to the first volume (V 1 ) due only to the elasticity of the flexible elastic material of the cup. In returning from V 2  to V 1 , the buckle region expands from a compressed position to a default (expanded) position. In some embodiments, returning of the cavity from the second volume to the first volume is achieved without a force external to the cup material, such as electrical assistance or mechanical assistance from another article or device, such as the driver. 
     In some embodiments, the cavity of the cup returns from the second volume to the first volume, in between intermittent repetitions of the varying, as a result of the configuration of the cup  102 , including buckle region wall  130 . As the buckle region wall  130  of cup  102 , expands or “springs out,” the buckle region wall  130  causes a thud force, or a “thumping” effect” throughout the cup, including the anchor walls  171 . Such thud force is imparted to the skin/labia of the user when the cup  102  is in contact with the skin/labia, creating a pleasurable effect for the user. Thus, the thud force is a transfer of mechanical energy from the springing out of the buckle, which is imparted to the user through the cup. It may feel like a jolt to the user during use. Wings  118   a - 118   c  (e.g.,  FIG. 1A ), if present, may assist with imparting the force to the skin/labia. 
     In some embodiments, the cam rotation is continuous. In other embodiments, the cam may stop at the position indicated by  FIG. 3D  for a predetermined amount of time before starting another rotation cycle. As an example, in some embodiments, the cam  150  may remain in the position indicated at  FIG. 3D  for a duration ranging from 200 milliseconds to 800 milliseconds, before starting another rotation cycle as indicated at  166  of  FIG. 3A . These duration and speed values are exemplary, and other values are included within embodiments of the present invention. 
     During usage, a rim (e.g.,  108  of  FIG. 1 ) of the cavity (e.g.,  106  of  FIG. 1 ) is placed in contact with the skin surrounding the clitoral region (or other region of the body to be stimulated) to form a sealed, or substantially-sealed, chamber. The opening of the cavity is disposed over the clitoral region (or other region of the body to be stimulated). In the example of  FIG. 3A , the cam is initially at its lowest position (turned to a point where that it provides minimum actuation so as to provide minimal or no compression of the cup), such that the initial volume of the cavity, V 1 , is Vmax. The initial pressure in the chamber is P 1 . When the stimulation device is powered on, the cam is rotated by the motor, causing the cam to make contact with the cam strike (or plate). This pushes the plate  140  to compress the cavity to a lower volume, indicated as V 2 , which in the example is Vmin. This increases the pressure inside the chamber to a maximum pressure indicated as P 2 . As the cam continues to rotate, and loses contact with the cam strike (or plate), the cavity returns to the non-compressed/maximum volume initial default position indicated as V 1 , releasing pressure in the chamber back to the minimum pressure value of P 1 . 
     In other words, the pressure starts at P 1  (a reference pressure), which is a gauge pressure reading of zero, which is the difference between the absolute pressure and the atmospheric pressure. This is measured at the geographic location currently where the stimulation device is being used. In other words, the gauge reading of zero is the ambient air pressure, at the geographic location that the user is using the stimulation device, that exists at the time the user uses the device. In the example of  FIGS. 3A-3D , as the cavity is compressed from V 1  to V 2 , the pressure increases to P 2  (the maximum pressure). As the buckle region wall  130  expands the cavity from V 2  to V 1 , the pressure returns back to the starting pressure (P 1 ). Since, in the example, the varied volume of the cavity is never greater than the initial volume (V 1 ) at start time, no pressure below the reference pressure (start pressure) is generated in the chamber. The start time is when both the cup is in place on the user&#39;s body, forming a chamber, and the device is powered on. Accordingly, only pressure at or above the reference pressure is generated. 
     In embodiments, the pressure field consists of pressure at or above a reference pressure. This varying pressure field stimulates a user&#39;s skin and/or clitoris by simulating a light touch similar to the way a person would stimulate themselves or another person by lightly touching them. 
       FIGS. 3E-3F  are top-down views that illustrate lateral expansion and contraction during the operation cycle illustrated in  FIGS. 3A-3D .  FIG. 3E  corresponds to a top-down view of the cup  102  as shown the uncompressed configuration of  FIG. 3A . In the uncompressed configuration, the cup  102  has an outer width  271 , and a cavity width  273 , corresponding to a width of cavity  106 .  FIG. 3F  corresponds to a top-down view of the cup  102  as shown the compressed configuration of  FIG. 3B . In the compressed configuration, the cup  102  has an outer width  275 , and a cavity width  277 , corresponding to a width of cavity  106 . The compressed configuration widths are greater than the corresponding uncompressed configuration widths. Thus, width  275  is greater than width  271 . Similarly, width  277  is greater than width  273 . In some embodiments, for the uncompressed configuration, width  271  is 42 millimeters and width  273  is 10 millimeters. In those embodiments, for the compressed configuration, width  275  is 43 millimeters and width  277  is 11.5 millimeters. In some embodiments, the widths of the compressed configuration are between 3 to 15 percent greater than corresponding widths of the uncompressed configurations. In embodiments, a width of the cavity of the cup increases from a first width to a second width, during a transition from the second volume back to the initial volume, as depicted in the cycle of  FIGS. 3A-3D . This expansion and contractions serves to mimic behavior of a human mouth engaged in oral sex with a vagina, serving to enhance the pleasure of the user during use of the device. 
       FIG. 4  shows a cross-section of an embodiment  400  of the invention including a cup and a driver installed into a housing. The cup  102  is, disposed on a housing  170 . In some embodiments, housing  170  is made from plastic, metal, or other suitable rigid material. In some embodiments, cup  102  is molded into a sheath including a layer of silicone, TPE, or other suitable material, disposed on the housing. In some embodiments, the cup is adhered to, or otherwise attached directly to, the housing  170  without molding into a sheath. The components of the driver are disposed within the housing  170 . In embodiments, the driver includes a motor  144 , plate  140 , and cam  150 . During operation, the motor  144 , mechanically coupled to cam  150 , rotates the cam  150 . When the cam  150  is in contact with plate  140 , the cam  150  pushes plate  140  to compress the buckle region wall  130  of cup  102  in the direction indicated by arrow E, reducing the volume of the cavity  106  from V 1  to V 2 . This increases the pressure in a chamber formed by the cavity  106  and skin of a user when the device is in use. When the cam  150  is not in contact with plate  140 , the buckle region wall  130  of cup  102  expands back to V 1  in the direction indicated by arrow F. 
     In the embodiment of  FIG. 4 , to increase the amount of air compression/pressure near the user&#39;s body, the cavity  106  comprises a first width W 1  and a second width W 2  where W 1  is not equal to W 2 . In the example shown, W 1 , closer to the opening  110 , is smaller than (&lt;) W 2 , closer to the base  114 . In some embodiments, W 2  may be smaller than W 1 . Additionally, in some embodiments, the cross section of cavity  106  may be asymmetrical. For example, edge  186  of the lateral cavity wall has a dissimilar contour as compared to edge  188  of the lateral cavity wall. Thus, in some embodiments, the cavity  106  comprises an asymmetrical cross-section. In operation, as the base  114  of the cavity  106  is pushed by the plate  140 , air is compressed from the wider, lower portion  182  into the more narrow, upper portion  184 , resulting in an increase in air compression/pressure in the chamber (formed by the cavity and user&#39;s skin), providing a pleasurable sensation for the user. 
       FIG. 5A  shows a cross-section diagram (cut along line L of  FIG. 4  viewed from direction indicated by arrow H of  FIG. 4 ) of a cup and plate assembly  500  in default position against skin  199  of a user. Buckle region wall  130  is shown in default position. Anchor wall  171  is in view. The material of the buckle region wall  130  is “relaxed”. In use, the user places the opening  110  of the cup  102  onto their skin  199 . The skin  199  seals or substantially seals a cavity  106  to form a chamber  160 . 
       FIG. 5B  shows a cross-section diagram of a cup and plate assembly  500  of  FIG. 5A  in compressed position against skin  199  of a user. As shown, buckle region wall  130  is compressed due to pushing force placed on it by the cam (e.g.,  FIGS. 3A-3D ) through plate  140 . Accordingly, the volume of the cavity  106  in  FIG. 5B  is different from the volume of the cavity  106  in  FIG. 5A . Note that anchor wall  171  may buckle, or bend, in addition to the buckle region, in some embodiments. In such though, the buckle region wall  130  will buckle first. 
     As the stimulation device continues to operate from the compressed position shown in  FIG. 5B , the buckle region  130  expands out to the default position ( FIG. 5A ) once the pushing force of the cam  150  is removed. In some embodiments, this expansion occurs without electrical assistance or mechanical assistance from a device external to the cup structure (meaning the material and the configuration of the cup). The cavity expands in volume during the time of non-contact of the cam  150  to the rigid plate  140 . Accordingly, during the operational cycle, the volume of the cavity is cyclically varied to create a pressure field in the chamber during use. 
     The following configuration of the cup is optimal for expansion from compressed position to default position to create the thud force, without a force external to the cup structure. In embodiments, dimension X 1  (height of the cup) ranges from 16 millimeters to 20 millimeters. In embodiments, dimension X 2  (anchor wall  171 ) ranges from 6 millimeters to 10 millimeters. In embodiments, the buckle depth X 3  ranges from 4 millimeters to 20 millimeters. In embodiments, the buckle width X 4  ranges from 20 millimeters to 30 millimeters. In embodiments the minimum thickness  530  of the buckle region wall  192  ranges from 1 millimeter to 4 millimeters. In some embodiments the ratio of the buckle region wall minimum thickness  530  to the buckle depth ranges from 0.05 to 1.00. In some embodiments, the buckle region wall material has a Shore durometer value ranging from A5 to D30. In some embodiments, the Shore durometer is D30. Although these values are optimal, any suitable values for the variables described herein are included within the scope of the invention that can achieve the result described herein. 
     Note that in some embodiments, the cup may be configured differently, and therefore, return to V 1  only due to the resilient nature of the cup material. In such cases, the return may be at a slower acceleration than when a cup with a configuration as shown herein is used. The slower acceleration will result in loss of the thud effect, and instead be a more “smooth” return. 
     In some embodiments, the speed of the rotation of the cam is 10 to 5000 rpm. In some embodiments, the speed ranges from 300 rpm to 600 rpm. In some embodiments, the speed of the cam rotation is a setting that is user-adjustable, allowing the user to customize the operation of the stimulation device for their preference. The user can choose a higher speed for an increased frequency of pressure changes (and vis versa), and also control the frequency of the resulting cyclical thud forces, if present. 
       FIG. 6A  shows a side view of an alternative driver and cup assembly  600  at V 1 .  FIG. 6B  shows a front view of alternative driver and cup assembly  600  at V 2  in a compressed position (note here in the non-limiting example that full compression is only partial). In other implementations, compression can be full compression. In the embodiment, the driver  639  comprises a plate  640  (disposed in contact with cup  602 ), a rod  617 , a cam  650 , and a motor  644 . Various connection members are included such that rod  617  is rotatably connected to the plate  640  on a first end, and rotatably connected to cam  650  on a second end. Plate  640  is in contact with cup  602 . During usage, a rim of the cup  602  is placed in contact with a user&#39;s skin to form a sealed, or substantially-sealed, chamber. The cavity has a first volume (V 1 ) and the chamber has a first pressure (P 1 ) ( FIG. 5A ). P 1  is typically the gauge pressure having a reading of zero. 
     In  FIG. 6A , the buckle region  630  is in default position. When powered on, the cam  650  is rotated by motor  644 . As the cam  650  rotates up to 180 degrees in the direction as indicated by arrow  658  ( FIG. 6B ), the volume of the cavity  610  of the cup  602  is decreased to V 2  ( FIG. 5B ), as the rod  617  is being pushed towards the cup  602 , compressing the buckle region wall as shown in  FIG. 6B . In  FIG. 6B , the buckle region wall  630  is in compressed position. At V 2 , a second and maximum pressure (P 2 ) is generated in the chamber. As the stimulation device continues to operate, the cam  650  is rotated, by the motor  644 , up to 180 degrees back (still in direction  658 ) by pulling the rod  617  away from the cup  602  via the cam  650 . This returns the cavity back to V 1  and P 1  in the position of  FIG. 6A . Accordingly, in some embodiments, the cup is mechanically coupled to a motor such that the buckle portion of the cup is pushed inward toward the rim and pulled outward away from the rim in a 360 degree rotating cyclical motion. This variation of volume of the cavity is performed cyclically while the motor is activated, such that a pressure field is generated in a chamber formed by the cavity of the cup and a user&#39;s skin. In embodiments, such as this, where there is constant mechanical coupling of the driver to the cup (instead of intermittent non-contact like shown in  FIGS. 3A-3D ), a buckling region may not be included. Embodiments may utilize any of the cup shapes and/or cup features described herein, or now known or hereafter discovered. The pressure field consists of only pressure at or above a reference pressure. 
       FIGS. 7A-7C  show details of another embodiment where the cup at V 1  is in a partially compressed (as opposed to default) position.  FIG. 7A  shows starting position. The driver comprises a motor  744 , a rod  717 , cam  750 , and plate  740 . Various connection members are included such that the rod  717  is rotatably connected to the cam  750  and the plate  740 . In embodiments, an encoder is integrated into motor  744  to establish a home position. In embodiments, a processor utilizes the encoder to set the cam  750  such that the rod  717  is in the position as shown in  FIG. 7A . The rod  717  is coupled to plate  740 , which is mechanically coupled to cup  702 . The processor, in conjunction with the encoder, ensures that the starting position is that shown in  FIG. 7A . During use, user applies an opening of the cavity of the cup  702  against the clitoral region (or other region of the body s/he wishes to stimulate), and then activates the motor  744 . The motor  744  oscillates between the position shown in  FIG. 7A , and the position shown in  FIG. 7C , with the position shown in  FIG. 7B  being a midway point. The position shown in  FIG. 7A  and that shown in  FIG. 8C  are equidistant from the midway point shown in  FIG. 7B . The cavity is partially compressed in each of  FIGS. 7A and 7C . In  FIG. 7B , the rod  717  is at its highest position, pushing the plate  740  into the cup  702 . The pushing of the plate  740  into the cup  702  compresses the cup to a minimum volume Vmin. In operation, the starting position shown in  FIG. 7A  represents V 1 , which is a maximum volume Vmax for an operational cycle. The motor  744  moves the cam in the direction shown by arrow D 1  in  FIG. 7A , continuing to the position shown in  FIG. 7B  (creating V 2 , which is Vmin), and then completing at the position shown in  FIG. 7C  (V 1  again). The motor  74  then moves in the reverse direction as indicated by the arrow D 2 , and the cycle continues with the motor  744  moving back and forth between the position shown in  FIG. 7A  and the “mirror image” symmetrical position shown in  FIG. 7C . Thus,  FIG. 7A  and  FIG. 7C  represent endpoints of the operational cycle. This variation of volume of the cavity is performed cyclically while the motor is activated, such that a pressure field is generated in a chamber formed by the cavity of the cup and a user&#39;s skin. The pressure field consists of only pressure at or above a reference pressure. 
     In some embodiments, the starting position is shown in  FIG. 7C , with the position in  FIG. 7A  being the second position. The directions of D 1  and D 2  would be swapped in such embodiments. 
       FIG. 8  shows is a time-pressure graph  810  showing the time-pressure relationship of the cam of  FIGS. 3A-3D . Graph  810  comprises vertical axis  811  representing pressure, and horizontal axis  812  representing time. Zero on the vertical axis indicates gauge pressure at atmosphere. This is the ambient air pressure, at the geographic location that the user is using the stimulation device, that exists at the time the user uses the device. As the cam rotates, a time-pressure curve  815  is generated, indicating varying amounts of pressure that occur within the cavity during operation. Since, in the example, the varied volume of the cavity is never greater than the initial volume (V 1 ) at start time, no pressure below the reference pressure (start pressure) is generated in the chamber. 
       FIGS. 9A-9C  show an alternative cycle for embodiments of the present invention. Note that cup  901  is substantially similar to cup  102 , made of a resilient material and having a rim and a cavity. A plate  940  is connected to the bottom of the buckle region wall  926  cup  901 . Components are the same as in  FIGS. 2A-2D , except the cam is at a different position at start time. In the embodiment, the starting position at time t 0  of the cup  901  is as shown in  FIG. 9A , where cam  904  is in its highest position (turned to a point where that it provides maximum actuation so as to provide maximum or full compression of the cup). Buckle region  926  is in compressed position. Accordingly, the volume of the cavity of the cup  901  is Vmin (or minimum volume) having a pressure equal to gauge pressure. During use, the rim of the cavity of cup  901  is pressed against the clitoral region (or other region to be stimulated) of a user, creating a sealed or substantially sealed-chamber. At a later time t 1 , the cup  901  is in a position as shown in  FIG. 9B . In  FIG. 9B , the cam  904  has rotated in the direction indicated by arrow N, such that the cam  904  has rotated approximately 100 to 120 degrees from the starting position depicted in  FIG. 9A . This causes a gap G to form between the cam  904  and the rigid plate  940 . This gap G allows the buckle region to expand, increasing the volume in the cavity of cup  901 , as illustrated in  FIG. 9C . The expansion of the buckle region wall  926  induces negative pressure (as compared with gauge pressure) on the clitoral region of the user. In some embodiments, the cam may then continue rotation to restore the cup position to that shown in  FIG. 9A . This variation of volume of the cavity is performed cyclically while the motor is activated, such that a pressure field is generated in a chamber formed by the cavity of the cup and a user&#39;s skin. Since, in the example, the varied volume of the cavity is never less than the initial volume (V 1 ) at start time, no pressure above the reference pressure (start pressure) is generated in the chamber. Only pressure at or below the reference pressure is generated. 
       FIG. 10  shows a pressure curve over time graph  1000  for the embodiment shown in  FIGS. 9A-9C . Graph  1000  comprises vertical axis  1005  representing pressure, and horizontal axis  1004  representing time. Zero on the vertical axis indicates gauge pressure at atmosphere. Zero on the horizontal axis represents time T 0 . Pressure curve  1002  does not extend above the gauge pressure line  1004 . From starting point  1001 , the pressure gets more negative until point  1007 , and then returns to the original pressure, and the cycle repeats. Note that the sine wave is disrupted, at points such as  1007 , when the buckle region ( 130 ) springs out. Thus, in such embodiments, there is no positive pressure applied to the clitoral/stimulated region of the user&#39;s body. 
       FIGS. 11A-11C  show a cycle for embodiments of the present invention utilizing both positive and negative pressure with respect to a reference pressure. Note that cup  1101  is substantially similar to cup  102  or cup  702 , made of a resilient material and having a rim and a cavity. In these embodiments, the starting position at time t 0  of the cup  1101  is as shown in  FIG. 11A , where the rod  1102  is in an intermediate position between the highest and lowest possible positions, due to orientation of the cam  1104 . During use, the rim of the cavity of cup  1101  is pressed against the clitoral region (or other region to be stimulated) of a user, creating a sealed or substantially-sealed chamber. At a later time t 1 , the cup  1101  is in a position as shown in  FIG. 11B . In  FIG. 11B , the cam  1104  has rotated in the direction indicated by arrow M, such that the cam  1104  has rotated approximately 100 to 120 degrees from the starting position depicted in  FIG. 11A  such that the rod  1102  pushes the buckle region  1126 , creating a minimal volume in the cavity of cup  1101 , and causing a positive pressure (meaning above gauge pressure) in the cavity of cup  1101 . The cam  1104  continues rotating to the position shown in  FIG. 11C , where the buckle region  1126  is fully expanded. The volume in the cup  1101  is increased over the volume of the cavity of cup in  FIG. 11A , thus creating a negative pressure (meaning below gauge pressure). Thus, the embodiment shown in  FIGS. 11A-11C  create both positive and negative pressure with respect to a reference pressure, which is gauge pressure at atmosphere. 
       FIG. 12  shows a pressure curve for the embodiment shown in  FIGS. 11A-11C . Graph  1200  comprises vertical axis  1205  representing pressure, and horizontal axis  1204  representing time. Zero on the vertical axis indicates gauge pressure at atmosphere. Zero on the horizontal axis represents time zero (T 0 ). Pressure curve  1202  starts at point  1201 , and increases above the gauge pressure line  1204  up until point  1203 . From point  1203 , the pressure reduces and then becomes negative (with respect to gauge pressure) until point  1205 . Then, the cycle repeats. Thus, in the embodiment of  FIGS. 11A-11C , there is both positive pressure and negative pressure with respect to the reference pressure is generated in a chamber formed by a cavity and a user&#39;s skin. 
       FIG. 13A  shows an example device  1300  having a pressure field stimulator  1301  in a base  1315 , having a cup  1304 , affixed to a first end of an arm  1319 . A second stimulator  1303  is shown affixed to the arm  1319  on a second end of the arm  1319 . In some embodiments, the second stimulator  1303  is insertable into a vagina or rectum of a user. The second stimulator  1303  includes a roller  1304  disposed adjacent a flexible sheath (a portion of which is represented at  1347 ). 
     In some embodiments, the second stimulator includes an insertable shaft  1302 . In some embodiments, the shaft  1302  includes a roller  1304  disposed on a threaded post ( 1310  of  FIG. 13B ) adjacent a flexible sheath (a portion thereof is represented at  1347 ). The sheath is tightly bound to the shaft  1302 . Shaft  1302  may be, or include, enclosure  1311 . The roller  1304  protrudes from the enclosure  1311  through an opening  1324  in the enclosure. The roller  1304  is disposed to traverse a path under sheath  1347 , during usage. In embodiments, the roller  1304  is adjacent an interior side  1359   a  of the sheath  1347  and the massage surface is the exterior side  1359   b  of the sheath. The roller  1304  may roll over the interior side  1359   a  to reduce friction from otherwise rubbing. The enclosure, threaded post, and roller are sized such that, during operation, the roller remains within the opening of the enclosure, and does not travel around the threaded post in between the interior walls of the enclosure. 
     In the example shown, the enclosure  1311  has an enclosure first portion  1314  and an enclosure second portion  1312 . Although depicted as two portions, in some embodiments, the enclosure may comprise only a single one-piece contiguous portion or more than two portions. In embodiments, the enclosure is substantially rigid, made from plastic, metal, glass, or other suitable material. 
     In some embodiments, the enclosure  1311  is made from plastic, silicone, hard rubber, composite, metal or other suitable material. In some embodiments, the roller  1304  is made from plastic, silicone, hard rubber, composite, metal or other suitable material. In some embodiments, the threaded post  1310  is made from plastic, silicone, hard rubber, composite, metal or other suitable material. 
     A massage surface represented at  1359   b,  of a sheath represented at  1347 , is disposed over the opening  1324  such that roller  1304  can impart stimulation from the massager device  1300  to a user&#39;s body. In some embodiments, the sheath may additionally extend over portions of the massage device other than only the opening. In embodiments, the sheath  1347  is comprised of silicone, rubber, plastic, or other suitable flexible elastic material such that the roller  1304  can protrude and extend the material outward. As the position of the roller  1304  changes, the material the roller is not currently pressing against may return to its original position. 
     User interface  1334  is represented as four buttons. A user may power on and off the device, as well as set parameters of usage, such as speed of the shaft motor  1355  of  FIG. 13E  (and therefore, the roller motion), or functionality of the pressure field stimulator, from the user interface. In some embodiments, the user interface may be on the shaft  1302 . In some embodiments the device may be controlled via a user interface on a remote controller. 
       FIG. 13B  is a front view showing detail of the insertable stimulator in accordance with embodiments of the present invention as viewed from the direction of arrow  1377  of  FIG. 13A . In some embodiments, the roller  1304  is spherical or other suitable shape. The roller  1304  has a width D. In some embodiments, D ranges from 12 millimeters to 30 millimeters. In some embodiments, D ranges from 19 millimeters to 24 millimeters. In some embodiments, the enclosure  1311  may be an elongate shape having a length L 3 , and a width W 5 , where L 3  is greater than W 5 . In some embodiments, L 3  has a value in the range from 8 centimeters to 17 centimeters, and W 5  has a value in the range from 3 centimeters to 7 centimeters. In some embodiments, roller  104  is disposed to traverse a path, along or in alignment with, longitudinal axis A of the elongate shape of the enclosure. In some embodiments, roller  1304  is disposed to traverse a path, substantially along or in alignment with, the elongate shape of the enclosure  1311 . This creates a “come hither” like motion with the roller  104  moving back and forth along a length of the enclosure  1311 , imitating movement of a finger. 
       FIG. 13C  is a front view showing detail of the insertable stimulator of  FIG. 13A  in accordance with embodiments of the present invention with the enclosure upper portion removed to illustrate additional parts. In this view, the threaded post  1310  is shown. The threaded post has threads, an example of which is pointed out at  1341 . The threads are a protrusion that extend around the elongate core of the threaded post like a screw. The threads have a pitch P. The pitch P corresponds to the width D of the roller  1304 . The roller  1304  is disposed within the plurality of threads. During operation, as the threaded post rotates in an alternating clockwise and counterclockwise motion (or vis versa), the spherical roller  1304  moves along the threaded post to perform a massage stimulation function. The roller  1304  is shown as a sphere, but it can be any suitable shape. 
       FIG. 13D  is a front view of a portion of a massager device in accordance with embodiments of the present invention showing detail of the enclosure portion  1312  without a sheath thereon. The enclosure portion  1312  has an opening  1324  which allows the roller  1304  to protrude outside of the enclosure  1311 . In embodiments, the elastic sheath presses the roller  1304  firmly against the threaded post  1310 , keeping the roller  1304  disposed within the threads  1341 . The opening  1324  of the enclosure  1311  serves as a guide for the roller  1304 . The opening  1324  has rails, indicated as  1393   a  and  1393   b,  disposed along two sides of a longitudinal axis of the threaded post with the roller  1304  disposed therein between. 
     As the threaded post  1310  rotates, the roller  1304  travels along path Pa 1  within the length L 4  of the opening, which is defined by the rails of opening  1324 . In embodiments, the roller travels along a linear path. In some embodiments, the opening  1324  is of a size such that its maximum width W 6  is less than the width D of the roller  1304  such that the roller  1304  may protrude without being able to completely pass through opening  1324 . 
       FIG. 13E  is a view showing additional details of the insertable stimulator of  FIG. 13A  in accordance with embodiments of the present invention. In this view, the enclosure is removed to show details of an example driver  1350 . The driver  1350  has a motor  1355  and an encoder  1357 . The driver  1350  includes the motor, encoder, as well as additional mechanical coupling such as shafts, gears, and/or other components for coupling the threaded post to the motor. The motor  1355  is an electric motor that operates in a reciprocating manner to alternate between clockwise and counterclockwise (or vis versa) rotation. The encoder  1357 , or other suitable mechanism, may be used for tracking the position of the threaded post  1310  relative to an initial “home” position. In some embodiments, the encoder  1357  may be integrated into the motor  1355 . 
       FIG. 13F  is a side view showing detail of the insertable stimulator of  FIG. 13A  in accordance with embodiments of the present invention. In this view, it can be seen that the roller  1304  protrudes outside of the enclosure by a protrusion length S. In some embodiments, the protrusion length S has a value ranging from 8 millimeters to 16 millimeters. In some embodiments, the value may be outside of such example range within the scope of the present invention. 
       FIG. 13G  is a side view showing detail of the insertable stimulator of  FIG. 13A  with start range and end range positions depicted in accordance with some embodiments of the present invention. In some embodiments, a first position  1342  is a starting range position, and a second position  1344  is the end range position. In some embodiments, the first position  1342  is an end range position, and the second position  1244  is the start range position. By controlling the amount of rotation of the threaded post, the roller  1304  can be made to alternate between the first position  1342  and the second position  1344 , or any intermediate locations between those two positions. As shown, the path Q of the roller  1304  traverses a longitudinal axis of the elongate shape of the enclosure  1311  A user may enter the settings for the start range position and/or the end range position via user interface  1334 , or via a remote controller. 
     Referring now again also to  FIG. 13D , the opening  1324  of the enclosure  1311  serves as a guide for the roller  1304 . The opening  1324  has rails, indicated as  1393   a  and  1393   b,  disposed along two sides of a longitudinal axis of the threaded post with the roller  104  disposed therein between. As the threaded post  1310  rotates, the roller  1304  travels along a path, which is defined by the rails  1393   a  and  1393   b  of opening  1324 . In some embodiments, the roller travels along a linear path. 
       FIG. 13H  shows a view of a stimulator having the tapered threaded post, with external sheath removed for clarity. The tapered threaded post  1351  has an increasing diameter in the direction towards the enclosure tip  1332 . In  FIG. 3 , two diameters are indicated, D 1  and D 2 , where D 2  is greater than D 1 . In embodiments, the diameter of the tapered threaded post may gradually increase over the length of the tapered threaded post. In some embodiments, the tapered threaded post has a minimum diameter ranging from 1 centimeter to 1.5 centimeters, and a maximum diameter of 2 centimeters to 3 centimeters. These values are examples, and any suitable values may be included within the scope of the invention. 
     During operation, the motor  1355  alternates directions periodically to rotate the threaded post  251  in a clockwise direction for a predetermined duration, followed by a counterclockwise direction for a predetermined duration (or vis versa). This causes the spherical roller  104  to move back and forth between the location indicated by  1304  and  1304 ′. As the spherical roller  104  moves back and forth, the protrusion length changes. The protrusion length is the length that the spherical roller  1304  extends beyond the enclosure. At the position indicated by  104 , the spherical roller has a protrusion length T 1 . At the position indicated by  104 ′, the spherical roller has a protrusion length T 2 . In this embodiment, T 2  is greater than T 1 . This is due to the tapered threaded post  251  being disposed to lower the roller at the position indicated by  1304 , as compared to the position indicated by  1304 ′. In embodiments, the position indicated at  1304  is a home position for the roller. When the device is powered off, the motor  1355  operates to return the roller to the position indicated as  1304 . A home position is an initialization position that may be used as part of a power-on sequence. During a power-on sequence, the device may first be brought to its home position. In some embodiments, during a power-off sequence, the device may be returned to its home position. This can serve to minimize stretching of an elastic sheath that is disposed over the stimulator when the device is not in use, thereby prolonging the life of the device. In embodiments, a processor executes instructions in memory to perform a homing operation prior to shutdown of the device. The homing operation returns the roller to the position indicates as  104  based on encoder input, limit switches, or other suitable position indicating mechanisms and/or techniques. 
     In some embodiments, the tapered threaded post  1351  may be installed in a reverse orientation, such that diameter D 1  is greater than diameter D 2 , and thus, protrusion length T 1  is greater than protrusion length T 2 . The increased protrusion length causes the spherical roller  1304  to press harder against the G-spot or prostate area during use. Thus, in the embodiment shown, the applied force of the spherical roller  104  increases as the spherical roller  1304  advances towards the enclosure tip  1332 . In other embodiments, where the threaded post  1351  is installed in the reverse orientation, the applied force of the spherical roller  1304  decreases as the spherical roller  104  advances towards the enclosure tip  1332 . 
       FIG. 14A  shows a front perspective view of a stimulation device 1400  in accordance with some embodiments of the present invention.  FIG. 14B  shows a back perspective view of a stimulation device  1400  in accordance with alternative embodiments of the present invention. In embodiments, the device  1400  has a shaft  1419  and base  1412  having a pressure field stimulator with cup  1402 . The pressure field stimulator  1401  has a cup  1402  and driver components (installed within housing  1420 ). The shaft  1419  and a portion of the base  1412  may be covered in a sheath  1403  such as silicone, TPE, or other suitable material. It is preferable that the material be non-permeable. Shaft  1419  may be adapted for insertion into a vagina or rectum of a user. In some embodiments, shaft  1419  is an elongate shape. A shaft of any suitable insertable shape is included within the scope of embodiments of the invention. In some embodiments, housing  1420  and shaft  1419  is made from plastic, metal, or other suitable (preferably non-porous) material. Sheath  1403  may extend over housing  1420 . In  FIG. 14B , charging port  1468  and user interface  1478  are in view. 
     Roller  1404  is shown protruding under sheath  1403  on shaft  1419 . The insertable shaft  1419  may include additional or alternative stimulation devices, including one or more of a vibrator, oscillator, gyrator, pulsator, and/or other massager, represented generally as  1421 . Some embodiments provide simultaneous clitoral and G-spot stimulation. Some embodiments provide simultaneous clitoral and prostate stimulation. 
     In some embodiments, the shaft  1419  and base  1412  may be connected to one another in a fixed position. In other embodiments, the shaft and base may be connected via a flexible arm. 
       FIGS. 15A and 15B  show an embodiment of the invention wherein the shaft and base are connected via a flexible arm.  FIG. 15A  shows an embodiment similar to  FIGS. 14A and 14B . In  FIG. 15A , the flexible material fill layer  1595  (shown in  FIG. 15D ) and sheath (outer layer)  1503  removed from the arm for clarity.  FIG. 15B  shows arm  1511  with flexible material fill layer  1595  present in between endplates  1597  and  1589 . Flexible material fill layer may be silicone or other suitable material. Arm  1511  allows the user to adjust distance and/or angle between the cup  1502  and the arm  1511 , and the cup  1502  and shaft  1519 , when present. The adjustable arm  1511  may be comprised of a flexible metal with silicone or another suitable flexible material there around. The arm is bendable such that it will hold its shape when bent. As shown, arm  1511  has a core, which may be elongate flexible members  1593   a  and  1593   b,  each comprising two wires twisted around one another. Electrical wires or other conduits, referred to generally as  1591  may be embedded within flexible material layer  1595 . Layer  1595  may have a shore durometer of Shore A1 and Shore A2, and sheath  1503  may have a shore durometer of between Shore A1 and Shore D40. A first end plate  1589  is an interface with pressure field stimulator  1501 , and a second end plate  1587  is an interface with shaft (such as the enclosure potions). Electrical wires/conduits  1591  may be disposed to extend through holes in the end plates  1587  and  1589 . Endplate  1587  and endplate  1589  may be made of metal, plastic, or other suitable material. In some embodiments, the endplates  1587  and  1589  may not be present. 
     Embodiments of the arm not limited to the components shown herein. In some embodiments, more than two flexible members may be includes. In some embodiments, only one flexible member may be included. In some embodiments, flexible member may each include only a single wire, or more than two twisted wires. 
       FIG. 16  shows an example of an arm  1611  which is not adjustable. Arm  1611  includes a rigid or substantially rigid frame  1613 . Housing  1605  may be made from metal, plastic, glass, or other suitable material. Housing may have a hollow interior  1695 . A first plate  1687  is an interface with a shaft and a second plate  1689  is an interface with a pressure field stimulator. Electrical wires/conduits  1691  may be disposed to extend through fill layer  1595  and holes in the end plates  1687  and  1689 . Plate  1687  and plate  1689  may be made of metal, plastic, or other suitable material. In some embodiments, the plates  1687  and  1689  may not be present. 
       FIG. 17  is a block diagram  1800  of an embodiment of a stimulation device of the present invention. The stimulation device includes a processor  1802  and memory  1804 . Memory  1804  may be a computer-readable medium such as flash, battery-backed static RAM, or other suitable computer-readable medium. In some embodiments, the memory may be non-transitory. The memory  1804  contains instructions, that when executed by the processor  1802 , perform steps in accordance with embodiments of the present invention. 
     The stimulation device may include an onboard input/output interface  1812 . This may include one or more input, output, and/or bidirectional pins for control of the stimulation device. User interface  1810  may include one or more buttons, switches, knobs, or other suitable controls disposed on the stimulation device. The buttons may be configured to create a signal on one or more input pins of the I/O interface  1812 . The processor may utilize interrupt service routines or monitoring loops to detect button presses and change the operation of the cup motor  1806  accordingly. A position encoder  1808  may be internal to the cup motor  1806 , or external to the cup motor  1806 , in some embodiments. In an alternative embodiment current peaks and valleys may be used to control the position of the motor. 
     User interface may include a power on/off and one or more buttons, or a slider to vary the speed of the cam. A user may modify the strength of the pressure field via user input. Various settings are associated with corresponding speeds of the driver (e.g., rotations per minute of the cam). Accordingly, a user may choose that the stimulation device generate greater or lower pressure for their comfort level. The higher the speed, generally, the more intense the stimulation. The stimulation device may include non-volatile memory  1814  for storing user settings. 
     In some embodiments, instead of or in addition to an onboard user interface  1810 , the stimulation device may include a wireless communication interface  1818 . The wireless communication interface  1818  may include a Bluetooth®, WiFi, or other suitable interface. The wireless communication interface allows pairing with an electronic device  1801  such as a dedicated remote controller, smartphone, tablet computer, or other electronic device. In some embodiments, the electronic device enables a rich user interface display, allowing for more complex programming options. Wireless communication interface  1818  may be in communication with a transceiver in the electronic device  1801 . The stimulation device may be controlled by the user via an application on the smartphone or computer. Some embodiments may not have all of the aforementioned components. 
     The stimulation device further includes a power source  1816 . In embodiments, the power source  1816  can include a battery. Battery  1816  may be a replaceable, or internally sealed rechargeable battery. In some embodiments, battery may be USB-chargeable, inductively chargeable, or other suitable charging mechanism now known or hereafter developed. It should be recognized that any power source, now known or hereafter developed, may be used. More than one battery may be included in some embodiments. In some embodiments, the stimulation device may be powered by alternating current power, such as 120V or 240V standard household power, with a power adapter comprising voltage regulators to convert the power to an appropriate DC level (e.g. 12V DC). 
     Shaft motor  1807  may be similar to motor  1355  for causing a roller  1355  to traverse a path of a stimulator as shown in  FIG. 13G . A position encoder  1823  (or other suitable control) may be internal to the motor  1807 , or external to the motor  1807 . It will be recognized that any suitable stimulation mechanism now known or hereafter developed may be substituted for, or used in addition to, the examples disclosed herein without departing from the scope and purpose of the present invention. 
     Referring still to  FIG. 17 , in accordance with some example embodiments herein, in some embodiments, the memory  1804  contains instructions, that when executed by the processor  1802 , that cause the driver (including motor  1806 ) to vary the volume of a cavity of a cup by intermittently decreasing a volume of the cavity of the cup from a first volume to a second volume. In some embodiments, the memory  1804  contains instructions, that when executed by the processor  1802 , cause the driver (including motor  1806 ) to decrease a volume of the cavity of the cup from a first volume to a second volume, and increase the volume of the cavity of the cup from the second volume to the first volume, wherein the first volume is a maximum volume. In embodiments, the memory  1804  contains instructions, that when executed by the processor  1802 , alternate motion direction of the shaft motor  1807  such that the spherical roller oscillates between the start range position and the end range position. In some embodiments, the memory  1804  contains instructions, that when executed by the processor  1802 , establish a second start range position and a second end range position, wherein the second start range position and second end range position define a second range. In some embodiments, the memory  1804  contains instructions, that when executed by the processor  1802 , establish a range transition time to switch between the first range and the second range. 
       FIG. 18  is an exemplary user interface  2400  in accordance with additional embodiments of the present invention. It should be recognized that user interface  2400  is an example, and other configurations with more or fewer features thereon may be substituted within the scope of the invention. In embodiments, user interface  2400  may be rendered on a remote controller, such as the screen of a smartphone or tablet computer via an application (“app”), or other suitable electronic device. The electronic device may pair with the massager device via Bluetooth, WiFi or other wireless communication interface. Various operating parameters can be received from entry by a user on the user interface  2400 , and then sent to the massager device via wireless communication interface. The processor ( 1802  of  FIG. 17 ) can implement those operating parameters. 
     As shown on user interface  2400 , there are three checkboxes. Checkbox  2404  allows the user to select to control the rate of the cup motor ( 1806  of  FIG. 17 ) of the clitoral suction stimulator. When the user selects (using a mouse, finger, stylus, etc.) that input, slider  2432  allows the user to toggle the intensity of the suction and compression from slow to fast. Checkbox  2406  allows the user to select to control the G-spot stimulator. When the user selects that input, slider  2434  allows the user to toggle the movement of the roller from slow to fast. The user can select to control both him/herself by selecting both checkboxes  2404  and  2406 . Alternatively, the user can select one of checkbox  2404  or  2406 , as well as checkbox  2402 , which causes synchronization. If the user selects checkbox  2404  and checkbox  2402 , the shaft motor ( 1807  of  FIG. 17 ) will be synchronized to the speed of the cup motor ( 1806  of  FIG. 17 ). As shown, the user has selected checkbox  2406  and checkbox  2402 , which means the speed of the cup motor ( 1806  of  FIG. 17 ) is synchronized to the speed of the shaft motor ( 1807  of  FIG. 17 ). 
     It should be recognized that user interface  2400  is an example for setting operating parameters. Other suitable user interfaces, and methods, may be substituted within the scope of the invention. It should also be recognized that buttons, sliders, fields, and other input devices on the user interface are examples, and other suitable inputs devices may be substituted within the scope of the invention. There may be more, fewer, or different input options. 
       FIG. 19A  shows an embodiment positioned on a user&#39;s body  1999 . User&#39;s body  1999  is shown as a cross-section. Enclosure portion  214  is shown transparent. Shaft  1919 , having roller  1904  and massage surface  1957 , is inserted into the vagina  1954 . Cup  1902  is positioned around the glans clitoris (referred to as “glans clitoral region” herein)  1952  such that wing regions  108  (see  FIG. 1A ) are under the labia majora in an interference fit. Arm  1950  is bent into a shape suitable for alignment of the cup  1902  with the glans clitoris and the shaft  1919  inside the vagina with roller  1904  near the G-spot region  1921 .  FIG. 19B  shows the device with shaft  1919  positioned further into the vagina  1954  with arm  1950 ′ in a straightened and extended position as compared with the position of arm  1950  in  FIG. 19A . 
     In some embodiments, the device allows “hands-free” usage such that the user can insert the shaft into the vagina, position the cup  1902 , and remove his/her hands as the device operates. In addition, it should be recognized that although shaft  1919  is shown inserted into a vagina, such may instead be configured for insertion into a rectum, via an anus, for prostate stimulation. 
       FIG. 20  shows a cutaway view of a portion of an alternative embodiment of the present invention including a plurality of rollers, with the external sheath removed for clarity. In this embodiment, a first roller  2004  and a second roller  2006  are included within enclosure  2011 . As the motor  2014  turns the threaded post  2018 , both rollers  2004  and  2006  are moved back and forth, creating a unique sensation in the G-spot area of a user. Thus, in some embodiments, a plurality of rollers are included. As shown, there are two rollers on a single threaded post  2018  in the example. In some embodiments, there may be more than two rollers included. In some embodiments, the first roller  2004  and second roller  2006  may be of the same size and/or shape. In other embodiments, the first roller  2004  may be of a different size and/or shape than the second roller  2006 . 
       FIG. 21  shows a cutaway view of an embodiment, wherein a vibrator  2122  (such as a pancake motor) in included within the shaft/enclosure along with the roller massager. Vibration stimulation can be imparted as well as massage of the roller. In embodiments, the enclosure  2111  includes a first motor  2114  which is coupled to threaded post  2118 . Roller  2104  is disposed on threaded post  2118 . As the first motor  1414  rotates the threaded post  1418 , the roller moves along the threaded post  2118 , creating a massaging sensation for the user. A second motor  2122  may be included within enclosure  2111  for imparting vibration to the enclosure  2111 . The vibration can provide an additional pleasurable sensation for the user. In embodiments, the second motor may be a pancake motor. In embodiments, the second motor may be disposed at a distal end of the threaded post  2118 , opposite the first motor  2114 . In embodiments, the second motor  2122  may be configured to operate independently of the first motor  2114 , such that the user can enable or disable the vibration independently of the operation of the roller  2104 . 
       FIG. 22  shows an embodiment where threaded post  2218  has one or more flattened portions  2227  of the threads such that the friction of the elastic sheath (e.g.  157  of  FIG. 1A ) causes the roller  2204  to travel over those portions rather than smoothly follow the threads of the threaded post  2218 . This creates a “bump” sensation that can be pleasurable to a user. The threaded post  2218  may also include some non-flattened portion(s)  2225  of threads. Accordingly, in some embodiments the threads of the threaded post are of an irregular shape. In some embodiments, the threaded post  2218  includes one or more flattened portions of threads. In some embodiments, the threaded post  2218  may include a combination of flattened and non-flattened portions of threads. 
       FIG. 23A  and  FIG. 23B  show diagrams of how portions of the opening of the enclosure may be narrower in some areas than in others to achieve a desired plane of the roller protruding therefrom. Referring now to  FIG. 23A , showing a side cutaway view of a shaft portion. The threaded post  2318  is disposed such that it has a plane PL 1  parallel to its longitudinal axis. The enclosure  2311  is formed with a curvature C such that the protrusion of the roller  2304  is such that the travel of the roller  2304  is along a plane PL 2 , where plane PL 2  is parallel to plate PL 1 .  FIG. 23B  shows the opening  2324  having a varying width. As shown in  FIG. 23B , there is a first width Wi 1 , a second width Wi 2 , and third width Wi 3 . In some embodiments, width Wi 2  is less than width Wi 1 , and width Wi 2  is less than width Wi 3 . The width of the opening  2324  controls the amount of protrusion of the roller  2304 . The width of the opening  2324  can be selected to control the amount of protrusion, and thus, affect the travel path of roller  1604 . 
       FIG. 24  is a front view of a portion of a massager device in accordance with alternative embodiments of the present invention showing detail of the enclosure portion  212  without a sheath thereon. The embodiment of  FIG. 24  comprises an opening  225  which comprises non-linear rails  295   a  and  295   b.  The non-linear rails cause the roller  104  to move along path Pa 2  when the threaded post rotates. Thus, in embodiments, the massager device is configured such that the travel path of the roller is non-linear. In some embodiments, as shown in  FIG. 24 , the path Pa 2  of roller  104  is an S-curve. Thus, in embodiments, the roller travels in an S-curve path between the start range position and the end range position. Other non-linear paths are possible with embodiments of the present invention. The non-linear path of the roller  104  can create a pleasurable sensation in some users, as compared with a linear path as depicted in  FIG. 13D . W 6  and L 4  may have similar dimensions as in  FIG. 13D . 
       FIGS. 25A and 25B  show views of a sheath that is disposed over the enclosure/shaft arm, and pressure field stimulator, as well as vibrator, if present.  FIG. 25A  shows a top-down view. The sheath  2502  is flexible, resilient, and elastic, and includes a shaft portion  2509  that stretches over the shaft and an integrated base portion  2511  that attaches to the enclosure and/or housing of the base/pressure field stimulator of embodiments with a tight fit. Cup  2506  includes cavity  2507 . In some embodiments, the sheath is made of silicone, rubber, TPE, plastic or other flexible and elastic material. “Elastic material” herein is a material that is expandable by force (such as roller), but returns to its original size when the force (e.g., of the roller) is removed. The cup  2506 , in some embodiments, is monolithic with the sheath. The cup  2506 , in some embodiments, is molded into the sheath as a single piece. In such embodiments, the cup and sheath may be injection molded via a single mold such that the resulting cup-sheath is a single piece and not made of two pieces. Thus, in embodiments, the covering of the shaft, base, and the cup is formed as an integrated piece of elastic material. Note that injection molding is an example process, and any suitable method of making is included within the scope of the invention. 
     Referring to  FIG. 25B , a bottom-up view of sheath  2502  is shown, illustrating the interior of the sheath. During assembly of disclosed embodiments, an interior shaft opening  2508  is configured and disposed to receive an enclosure comprising one or more rollers and a threaded post. An attachment point  2504  is formed around the base portion  2511 . In embodiments, attachment point  2504  comprises a raised lip (protrusion) of material. The sheath is attached to the shaft or housing in any suitable way. In some embodiments, it may be via reciprocal grooves and protrusions on the shaft or base housing, and sheath, noted as attachment point on the sheath. The sheath may be adhered to the shaft/housing instead or in addition to reciprocal grooves and protrusions. 
       FIG. 26  shows a partial view of the internal components of a base including a pressure field stimulator  1900  in accordance with some embodiments of the invention. In some embodiments, a shaft, or arm is attached, a portion thereof is shown at  2619 . A portion of the housing and where the sheath attaches is in view. The pressure field stimulator  2600  includes a housing  2602  that houses internal components, including, but not limited to, motor(s), pump(s), batteries, circuits, and/or other components. Inside the housing is shown an example driver, including a motor  2611 , cam  2613 , and plate  2615 . An attachment point, such as groove  2604 , is formed within the housing  2602  that is configured and disposed to receive attachment point (protrusion  2504  of  FIG. 25B ) of the sheath  2502 . The housing  2602  may further include at least one support flange  2606 , which provides mechanical support for the base portion  2511  and/or cup  2506  of the sheath  2502 . In some embodiments, the width of the groove  2604  and the width of protrusion  2504  are sized such that a tight friction fit forms between them when the protrusion  2504  is applied to groove  2604 . In some embodiments, the sheath  2502  may be removable by the user to facilitate cleaning. In other embodiments, the sheath  2502  may be permanently affixed to the housing  2602  via adhesive, sealant, or other suitable technique. 
     In some embodiments, the sheath and the cup are shown integrated. In such embodiments, they consist of a single connected piece, and not two separate pieces. The cup may be molded into the sheath to achieve this result. An example non-limiting process for molding is as follows. A four part mold is constructed which includes: an interior surface part, an exterior portion on the right, an exterior portion on the left, and a final piece to mold the detail of the outside of the cup. The mold is assembled, and then liquid silicone is injected into the mold. The mold is disassembled after the silicone solidifies, such that the cup and sheath remain as a single piece. In some embodiments, there can be post molding processing to remove mold flash and to achieve a desired surface finish. 
     It should be recognized that although described as applicable to massage of a G-spot, prostate, or clitoris, that embodiments may be used for stimulation of any suitable body part. 
     It should also be recognized that the various pressure field stimulators described herein are non-limiting examples. Any suitable configuration of the pressure field stimulator is included within the scope of the invention, regardless of the type of pressure field created within the chamber. The pressure field may: consist of pressures at or above a reference pressure only, consist of pressures at or below a reference pressure only, consist of pressures above a reference pressure only, consist of pressure below a reference pressure only, or include any pressures in relation to the reference pressure within the scope of embodiments of the invention. 
     Some embodiments are waterproof such that they may be washed with fluids, like soap and water. Accordingly, the attachment points of the sheath and any other external portions are sealed where necessary. This allows a user to clean the device thoroughly between uses. 
     In some embodiments, the pressure field stimulation device is unitary in structure, meaning the components thereof together form a single product, rather than multiple products which may be used together by a user. 
     While the invention has been particularly shown and described in conjunction with exemplary embodiments, it will be appreciated that variations and modifications will occur to those skilled in the art. The embodiments according to the present invention may be implemented in association with the formation and/or processing of structures illustrated and described herein as well as in association with other structures not illustrated. Moreover, in particular regard to the various functions performed by the above described components (assemblies, devices, circuits, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (i.e., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary embodiments of the invention. In addition, while a particular feature of the invention may have been disclosed with respect to only one of several embodiments, such feature may be combined with one or more features of the other embodiments as may be desired and advantageous for any given or particular application. Therefore, it is to be understood that the appended claims are intended to cover all such modifications and changes that fall within the true spirit of the invention.