U.S. patent number 3,788,485 [Application Number 05/273,352] was granted by the patent office on 1974-01-29 for drain guard for contact lens.
Invention is credited to Leslie Bruning.
United States Patent |
3,788,485 |
Bruning |
January 29, 1974 |
DRAIN GUARD FOR CONTACT LENS
Abstract
A flexible contact lens drain guard having a ring fabricated of
rubber or plastic or the like. A mesh net extends across the ring
opening and is bonded to or formed unitarily with the ring. Suction
means are formed on the base of the ring and extend around its
circumference.
Inventors: |
Bruning; Leslie (Venice,
IT) |
Family
ID: |
23043550 |
Appl.
No.: |
05/273,352 |
Filed: |
July 20, 1972 |
Current U.S.
Class: |
210/474; 4/292;
4/286; 210/482 |
Current CPC
Class: |
E03C
1/264 (20130101) |
Current International
Class: |
E03C
1/26 (20060101); E03C 1/264 (20060101); E03c
001/26 () |
Field of
Search: |
;4/1,109,190,286,287,289,292,295,DIG.5 ;210/163-166,169,463,474,482
;206/15 ;D23/4,41,42 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Adee; John
Assistant Examiner: Spitzer; Robert H.
Attorney, Agent or Firm: Hume, Clement, Brinks, Willian,
Olds & Cook, Ltd.
Claims
What is desired to be claimed and secured by Letters Patent of the
United States is:
1. A drain guard for temporarily blocking the drain opening in a
sink or the like to prevent a contact lens from being lost down the
drain while handled over the sink by its user but permitting the
flow of liquid down the drain, comprising:
a. a narrow rim fabricated of flexible material so that it can
easily be deformed from a normal, annular ring shape to conform to
the surface contour of the sink as well as be deformed for
storage,
b. an open, uncovered screen fabricated of flexible material, so
that it can easily be deformed, extending across the opening within
the annular ring and secured around its periphery to the ring,
and
c. suction means extending around the lower surface of said ring
for gripping, by suction, the surface of the sink surrounding the
sink opening,
d. said suction means being so constructed and arranged that a
contact lens cannot slip between said ring and the sink surface to
be lost down the drain.
2. The drain guard of claim 1 further characterized in that:
a. in its normal configuration said screen lies substantially in a
plane co-extensive with said ring.
3. The drain guard of claim 2 further characterized in that:
a. said suction means comprise a plurality of individual suction
cups annularly spaced at predetermined intervals less than the
width of a contact lens around the entire circumference of the
lower surface of said ring.
4. The drain guard of claim 2 further characterized in that:
a. said suction means comprise a continuous trough extending around
the entire circumference of the lower surface of said ring.
Description
BACKGROUND OF THE INVENTION
This invention relates in general to contact lenses normally worn
by people in lieu of eyeglasses. It deals more particularly with a
drain guard for preventing the loss of contact lenses down sink
drains while they are being inserted or removed from a person's
eyes.
Many contact lenses are lost annulally down uncovered sink drains
when the wearer is inserting or removing them, for example. When
the sink has a drain plug, this can be averted, of course. However,
particuarly when travelling, the wearer frequently uses a sink
without a drain cover, or with some inadequate cover; i.e.,
inadequate to prevent a tiny contact lens from going down the
drain. As a result, it is quite easy to lose an expensive lens,
totally disregarding the inconvenience involved.
There are "portable" devices available for covering or guarding
drains when handling contact lenses over a sink. However, those
available are not capable of use on drain openings of widely
varying shapes and sizes, are bulky and normally inseparable from a
lens carrier, or have other shortcomings. An example of a known
contact lens guard and carrier is disclosed in the Entzminger U.S.
Pat. No. 3,083,819.
SUMMARY OF THE INVENTION
The primary object of the present invention is to provide a greatly
improved contact lens drain guard for preventing a contact lens
from going down the drain passage of a sink in cases where the
drain plug or closure disc is either missing or malfunctioning.
Another object is to provide a drain guard which is flexible in its
applications; i.e., not confined to use on a drain of one size or
shape. A further object is to provide a guard which is flexible and
can unobtrusively be carried in a pocket or purse. Yet a further
object is to provide a contact lens drain guard which is virtually
infallible in operation.
The foregoing and other objects are realized in accord with the
present invention by providing a contact lens drain guard
comprising a circular suction ring forming the annular rim of the
guard. The ring is formed of resilient material and, in one aspect
of the invention, has a plurality of suction cups unitarily formed
on its lower surface, closely spaced, and extending around the
entire lower surface. Extending across the ring and bonded to it
around its circumference is a mesh screen formed of a suitable,
flexible material; nylon, for example. The screen has openings
considerably smaller than the size of a single contact lens. The
ring is large enough so that it will readily cover the drain
opening in a wide variety of drains. Because of the flexibility of
the ring, it conforms to the contour of sinks having different
conformations around the drain opening. The suction cups adhere to
and hold the guard rim to the sink bottom, with the mesh material
overlying the drain opening. As a result, a lens cannot
inadvertently be lost down the drain. When the user is finished,
the suction is easily broken and the guard removed for storage in
folded or unfolded relationship in a pocket, purse, or special
container.
In another aspect of the invention, the suction cups surrounding
the rim are replaced by another form of suction device. A single
continuous suction channel is formed in the lower surface of the
ring and provides substantially the same effect as the suction cups
in adhering to the bottom of a sink surrounding a drain opening.
Such a construction has the advantage of being less expensive to
manufacture. However, it must be more carefully placed to obtain a
uniform suction grip around the entire rim of the guard.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention, including its construction and method of operation,
together with additional objects and advantages thereof, is
illustrated more or less diagrammatically in the drawing, in
which:
FIG. 1 is a top plan view of a lens drain guard embodying features
of one form of the present invention;
FIG. 2 is a bottom plan view of a portion of the guard illustrated
in FIG. 1;
FIG. 3 is a vertical sectional view taken through the rim of the
guard shown in FIG. 2, with the portion of a sink bottom shown to
illustrate the manner in which the guard rim suction cups adhere to
the sink bottom; and
FIG. 4 is a vertical sectional view taken through an entire lens
drain guard embodying features of another form of the present
invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawing, and particularly to FIGS. 1-3, a
contact lens drain guard embodying features of a first form of the
present invention is illustrated generally at 10. The lens drain
guard 10 comprises a circular ring or rim 11 formed of a resilient
material such as natural or synthetic rubber or a suitable plastic.
The ring 11 forms the annular rim of the drain guard 10 and is very
narrow relative to the ring diameter so that it has minimum bulk,
is very light, and will fold very easily.
Bonded to the ring 11 and extending across the entire area within
its confines, is a circular net of mesh material, seen generally at
12. The mesh net 12 is fabricated of nylon or the like and is
bonded around its annular periphery to the ring 11 by suitable
adhesive means or, in the alternative, by being formed unitarily
with the ring during forming of the ring.
As seen in FIG. 3, the upper surface 15 of the ring is generally
flat and uninterrupted. In contrast, formed on the lower surface 16
of the ring, and annularly spaced around in closely adjacent
relationship, are a series of identical suction cups 20. These
suction cups 20 are of broadly conventional configuration, each
being molded unitarily with the rim generally in the form of a
hemisphere having a lower, annular contact edge 22.
The mesh openings of the net 12 are small enough so that a contact
lens cannot pass through, 1/16 inch openings, for example. In
addition, the spaces 25 between the suction cups 20 around the
lower surface 16 of the rim 11 are very narrow, preventing a
contact lens from slipping between them. Accordingly, when the lens
guard suction cups 20 are pressed downwardly against the base B of
a sink, as seen in FIG. 3, with the mesh net 12 overlying the sink
drain, a contact lens cannot inadvertently go down the drain should
it be dropped by the user when he or she is attempting to insert or
remove the lens, or wash it, for example.
The lens drain guard 10 is extremely flexible and can readily be
folded in halves or quadrants for storage in the users' purse or
wallet, for example, where it occupies minimal space, is flat, and
not bulky. It can be carried and used separately from the lens
case.
Referring now to FIG. 4, another form of the lens drain guard is
seen generally at 110. The guard 110 also comprises an annular ring
111 having a mesh net 112 filling the space within its annular
periphery. In this regard, it is identical in construction to the
first form of the lens drain guard invention seen at 10 in FIG.
1.
The guard 110 differs from the guard 10 in the fact that a
continuous, annular suction trough 120 is formed around the entire
lower surface of the rim 111. The walls forming the annular trough
120 terminates in continuous free, lower edges 122.
The guard 110 is utilized in substantially the same manner as that
described in relation to the guard 10. The suction trough 120 is
effective to create a suction between the ring 111 and the surface
of the sink base surrounding a drain opening when the ring is
pressed downwardly against the base surface. Since a continuous
trough is employed, rather than individual suction cups, it is
important that the rim be uniformly pressed around its entire
periphery against the sink base to establish an effective seal, of
course. In this way, the guard 110 is more sensitive to
malfunction. However, the guard 110 is slightly less expensive to
manufacture, than the guard 10.
While several embodiments described herein are at present
considered to be preferred, it is understood that various
modifications and improvements may be made therein.
* * * * *