Non-slip condom

Abstract: A condom includes at least one ring above a ring at the opening of the condom, and at least one section of reduced inside diameter relative to other sections thereof between the open and a closed ends.

Description: Field of the Invention The present invention relates generally to condoms, and more particularly to condoms provided with non-slip features. Background of the Invention Normally the condom is made of strong latex rubber, or some type of animal skin or a synthetic membrane such as polyurethane. Of necessity, in order to provide an acceptable level of tactile stimulation to the wearer, the condom must be quite thin. In general. it is elastically fitted to the male organ and during coitus remains stretched and taut. This stretched, taut condition of the condom can compromise the integrity of the condom insofar as leakage and slippage are concerned. In U.S. Patent Application Serial No. 821,382 entitled "Multiple Ring Condom" that was filed on March 20, 1997, methods were disclosed for improving the user protection and safety associated with condoms by adding one or more additional rings between the conventional or base ring at the opening of the condom and the closed end. Through use of this configuration, the incidence of slippage and leakage of the condom during use is substantially reduced, i.e., when following ejaculation the penis becomes flaccid, a possibility of leakage of seminal fluid and slippage of the condom occurs. It is believed that proper placement of the rings will provide clitoral stimulation. While the distance between rings on the condom is not critical, a distance of at least 0,635 cm (one-quarter inch) between rings has been found to be suitable. It is believed but not yet proven that even a distance of 10.2 cm (four inches) between rings may be suitable. In general the rings formed on the condom will have approximately equal outside and inside diameters, but rings of different outside and inside diameters may be used, i.e., the additional rings above the base ring at the opening of the condom can have a smaller outside and inside diameter than that of the base ring to reduce slippage. There is a limit, however, to the degree to which the diameter of a ring can be reduced without being so tight on a penis as to be objectionable to the user. Summary of the Invention In accordance with this invention, there is provided a condom comprising: a unitary, substantially tubular body having opposed closed and open ends, including, proceeding from the closed end to the open end, first, second and third successive sections; the first section having a constant first inside diameter; a first ring at the open end; a first ring at the open end; characterised by the second section itself having a gradual linear reduction in inside diameter from the first diameter to a second inside diameter at an intersection with one end of the third section; the third section itself having a constant inside diameter between the second section and the open end; and a second ring located on said third section adjacent said first ring, the first and second rings having diameters controlled for providing means for securely retaining the condom upon a penis, the second ring having inside and outside diameters equal to, less than, or greater than, those of the first ring, thereby controlling the relative thickness of the rings. German specification No 1566365 (Noth) discloses a condom having a constant diameter body extending from a closed end to an open end provided with a first ring, and a constriction near the closed end, in which is located a second ring. US Patent No 5467781 (Kato) discloses a condom with a substantially constant diameter from a closed end to an open end provided with a ring, a region near the open end having a series of annular ridges formed on the outer surface of the body. Brief Description of the Drawings An embodiment of the present invention is described in detail below with reference to the accompanying drawings, in which like items are identified with the same reference designation, wherein: Figure 1 shows a condom described and claimed in the aforesaid Patent Application, which does not represent the invention; and Figure 2 illustrates a preferred embodiment of the invention where a third section of a reduced diameter occurs at the open end of a condom. Description of the Invention In Figure 1, a condom 1 includes a main body section 10, a ring 3 at its opening, a ring 5 above ring 3, and optionally a plurality of rings 7 and 9 above ring 5, as shown. The closed end 18 has a nipple-shape for providing a reservoir for semen, in this example, but can be otherwise shaped, such as not including a reservoir but having a blunt end. This design corresponds to that taught in the related Serial No 821,382 described above. However, in one embodiment of the present invention, the inventors recognized that by controlling the thickness of the rings, non-slippage is enhanced, whereby a relatively thicker ring provides a tighter fit of the condom 1 on a penis. Although not shown in Figure 1, but as shown in Figure 2, the outside and inside diameters of the ring 5 are typically less than the outside and the inside diameters of the body 10, respectively, of the condom 1 so as to reduce slippage, but, as previously noted, there is a practical limit to the minimum inside diameter of ring 5. Also, there is a practical limit to the maximum thickness for a given ring 3, 5, 7, or 9. The thickness for a given ring is substantially equivalent to the difference between the outside and the inside diameters of the ring. In the preferred embodiment of the invention shown in Figure 2, the inside diameter is reduced or tapered between points 11 and 12 of a second section to the inside diameter of the ring 5, and in a third section retains the diameter to the open end 13 where the ring 3 is located. This diameter reduction can be abrupt, but a smooth transition is preferred. The ring 5 is formed by rolling back material from the open end to a desired outside diameter. Ring 3 can be formed in the same manner as ring 5 as taught in the previously mentioned Serial No 821,382. Rings 7 and 9 are similarly formed. The friction of the section 12-13 of a reduced diameter adds to the friction provided by the ring 5, but because the condom is made of light material it does increase the sensation of tightness, but not in an objectionable manner to the user. Although an embodiments of the invention has been shown and described herein, it is not meant to be limiting. Those of skill in the art may recognize certain modifications to this embodiment, which modifications are meant to be covered by the scope of the appended claims.

Claims: A condom comprising: a unitary, substantially tubular body (1) having opposed closed and open ends (18,13), including, proceeding from said closed end (18) to said open end (13), first, second and third successive sections (10; 11, 12; 12, 13) said first section (10) having a constant first inside diameter; a first ring (3) at said open end; characterised by : said second section (11, 12) itself having a gradual linear reduction in inside diameter from said first inside diameter to a second inside diameter at an intersection with one end of said third section (12, 13); said third section (12, 13) itself having a constant inside diameter between said second section (11, 12) and said open end (13); and a second ring (5) located on said third section (12, 13) adjacent said first ring (3), said first and second rings having diameters controlled for providing means for securely retaining said condom upon a penis, said second ring (5) having inside and outside diameters equal to, less than, or greater than, those of said first ring (3), thereby controlling the relative thickness of the rings. A condom according to Claim 1, further including a plurality of other rings (7) formed along said body and spaced apart from one another and from said first and second rings. A condom according to Claim 1, wherein the first ring is formed by rolling back said third section. A condom according to any preceding claim, made from latex rubber, animal skin, or a synthetic membrane. A condom according to any preceding claim, further including a nipple-shaped reservoir for semen formed at the closed end.

Inventors: BLUM DENNIS R, BURNS JIM D, HARRISON MICHAEL J, SISBARRO FREDERICK P, STRAUSS STEVEN R, BLUM, DENNIS R., BURNS, JIM D., HARRISON, MICHAEL J., SISBARRO, FREDERICK P., STRAUSS, STEVEN R.
Applicants: ARMKELL LLC
Application year: 1999
Main classification: A61F6
IPC codes: A61F6