Patent Application
20150369276
1. Field of the Invention
This invention relates to a suction cup, and more specifically to rigid suction cup device with high stiffness.
2. Description of Related Art
Suction cups are used to mount objects to smooth surfaces. The cup itself may be made of rubber, or a rubberized plastic. The cup may have its external rim area pressed against the mounting surface while the cup center is pulled upwards. The external rim area may then form an airtight seal and a reduced pressure area within the cup results in a sealed mount upon the smooth surface.
A drawback with prior designs relates to a lack of stiffness of the mounting unit, such that the supported device may have some wobble, or be subject to shaking, for example. Another drawback to prior designs is that the method of creating the seal, such as by rotation of an element of the device, does not involve an interface to the user which is able to be fully grasped from any direction.
What is called for is a suction cup design which incorporates aspects adapted to provide significant stiffness to the mounted system. What is also called for is a suction cup design which allows for full and easy gripping of the portion of the device which sets the suction of the device.
A suction cup attachment device adapted to provide a high stiffness mounting support. The suction cup is restrained around its rim and pulled via a piston attached to its center. The piston is pulled through a cylinder and pressure is provided against a support surface close to the exterior of the cylinder.
The top surface 126 of the top piece 111, along with the threaded insert 125, provide the other interface and contact point of the suction cup device. These rigid the single piece cup housing 107, along with the snugly overlaid top piece 111, provide a rigid continuity of structural support not seen in other devices. This rigidity provides for better adherence of the suction cup to a mounting plane, as there is less opportunity for irregular pressure around the circumference of the cup housing. Also, this rigidity allows for better function, and wobble and other disturbance is greatly reduced with this rigid structure configuration.
Another aspect of the rigid nature of the suction cup device 100 regards the sliding fit of the shaft 118 of the cup piston 103 into the mating cylinder 117 of the cup housing 107. The cup piston 103 is molded into the suction cup 101 and then inserted into the mating cylinder 117 of the cup housing 107. As seen in
The creation of the suction in the suction cup, which creates the attachment of the suction cup device 100 to the surface to which it is be affixed, is achieved by the rotation of the grip ring 110 by the user. The grip ring 110 engaged around the exterior of a set of pieces which will raise the pin 114. The grip ring 110 is affixed around the exterior of the outer engagement ring 109. The outer engagement ring 109 is attached to the inner engagement ring 108, and may be attached with fasteners. The inner engagement ring 108 has sloped surfaces 122 such that as the inner engagement ring 108 is rotated, the sloped surfaces 122 put axial pressure on the pin 114 such that the suction cup is activated. Once released, the cup may be further loosened by pulling on the release tab 102.
The grip ring 110, the outer engagement ring 109, and the inner engagement ring 109 are adapted to move as a unit. The inner engagement ring 108 may have guides 123 adapted to fit into guide holes 124 in the outer engagement ring 109. The upper surface 115 of the cup housing 107 provides a forcing surface for the bottom of the engagement ring assemble to push on, as it raises the ping 114. Thus the device top piece 111, the main cup housing 107, and the suction cup 101 all are rigidly linked to provide a very rigid suction cup attachment. The piston 103 is snugly within the cylinder of the housing 107, providing another level of stiffness. The slot 116 is vertical and thus reduces the bending stiffness of the cylinder by the least amount possible.
As evident from the above description, a wide variety of embodiments may be configured from the description given herein and additional advantages and modifications will readily occur to those skilled in the art. The invention in its broader aspects is, therefore, not limited to the specific details and illustrative examples shown and described. Accordingly, departures from such details may be made without departing from the spirit or scope of the applicant's general invention.
