Supports – Brackets – Specially mounted or attached
Patent
1993-11-16
1995-05-02
Foss, J. Franklin
Supports
Brackets
Specially mounted or attached
2482062, A45D 4214
Patent
active
054112303
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a holding device having a flexible diaphragm acting as a suction cup, with assembled central pin. The holding device has a pressure ring which contacts the periphery of the diaphragm, and a mechanism for lifting the central pin with respect to the pressure ring.
2. Description of the Prior Art
A conventional holding device is known, for example, from British Patent GB-PS 2,185,067. The British Patent teaches a pressure ring with a top cover. A pin extends through the cover and is pulled upward by an actuating member. A helically shaped ramp pulls the pin upward. To accomplish this, it is necessary to turn the actuating member, thus there is always a danger that the pressure ring will turn along with the actuating member and slide over the diaphragm.
SUMMARY OF THE INVENTION
It is one object of this invention to provide a holding device which is constructed as simply as possible and prevents this danger.
BRIEF DESCRIPTION OF THE DRAWINGS
One preferred embodiment of this invention is illustrated in the accompanying drawings wherein:
FIG. 1 is a sectional view of a holding device, according to one preferred embodiment of this invention;
FIG. 2 is a partial sectional view of a pressure ring of the device shown in FIG. 1;
FIG. 3 is a top view of a diaphragm of the device shown in FIG. 1;
FIG. 4 is a side view of the diaphragm shown in FIG. 3;
FIG. 5 is a bottom view of a cover of the device shown in FIG. 1;
FIG. 6 is a side view of the holding device shown in FIG. 1; and
FIG. 7 is a sectional view of the holding device according to one preferred embodiment of this invention;
DESCRIPTION OF PREFERRED EMBODIMENTS
A holding device of this essentially comprises three parts, a diaphragm 1, a pressure ring 2 and a cover 3. The holding device is shown in an operational position in FIG. 1, in which the holding device is firmly attached to a smooth surface, for example a sheet of glass or a mirror. The individual parts will be first described in detail and their interaction will be explained.
The circular diaphragm 1 comprises rubber or a rubberelastic plastic material. A pin is, preferably of a hard plastic material, is attached to the center, a flange 11 of which is embedded in the diaphragm 1. The flange 11 has a plurality of holes 12 for improved adhesion to the diaphragm 1. The left half of FIG. 3 shows the top of the diaphragm 1 and the pin 10, and the right half of FIG. 3 shows the flange 11. Cams 13, projecting out of the upper surface of the diaphragm 1, are shown in FIG. 3 and in FIG. 4. Six circularly arranged cams 13 are shown in the preferred embodiment of FIGS. 3 and 4. To conserve material and for manufacturing reasons the pin 10 is hollow. The pin 10 has a shoulder 14 in its upper area, the purpose of which will be explained later. The pressure ring 2 shown in FIG. 2 is prefereably made of a hard plastic material. The pressure ring 2 has a projecting rim 20 at the bottom. The inside surface of the wall 21 of the pressure ring 2 has evenly spaced recesses 22, which have the shape of semi-circular niches the curvature of which approximately corresponds to the diameter of the cams 13. Twenty-four recesses 22 are evenly distributed along the circumference. Three ramps 23 are evenly distributed on an upper rim of the wall which terminates in the wall 21. In an upper end of the ramp 23 a small indentation 24 is used as a stop.
A cover 3 as shown in FIGS. 1 and 5 has a rim 31 which extends beyond the pressure ring 2 with play in the assembled state. A slitted sleeve 32, having a circumferential groove on an inside surface sized to engage with the shoulder 14 of the pin 10, is located in the center of the cover 3. A collar 33 is disposed on the top of the cover 3 and has a spherically shaped inside surface, into which a ball 4 of a holding member 41 can be mated. The collar 33 has a slit 34 which allows the holding member 41 to pivot completely downward. The ball 4 is securely held in the collar 33 in every position.
Three
REFERENCES:
patent: 371281 (1887-10-01), Siemang
patent: 1010363 (1911-11-01), Hazelrigg
patent: 1739641 (1929-12-01), Lessmann
patent: 2047658 (1936-07-01), Zaiger
patent: 2146859 (1939-02-01), Seklehner
patent: 2311525 (1943-02-01), Ebbs
patent: 3747170 (1973-07-01), Kieves
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