Brushing – scrubbing – and general cleaning – Implements – Brush or broom
Patent
1986-06-02
1988-06-21
Feldman, Peter
Brushing, scrubbing, and general cleaning
Implements
Brush or broom
15194, 151671, A46B 904
Patent
active
047517611
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for cleaning the spaces between teeth.
The brushes utilized for the conventional devices of this type (U.S. Pat. Nos. 4,319,377 and 4,222,143) have a bristle carrier consisting of a twisted wire loop and exhibiting for mounting purposes an end member projecting out of the bristle body. This end member is extended, in the conventional devices, through a passage hole of the handle and bent over toward the handle whereupon a sleeve supported on the handle is pushed over the bent wire end. Bending over of the wire end and holding down of the bent wire end, which latter step is unavoidable during placement of the sleeve because of the spring-back action of the wire, are troublesome, and the wire end can cause injuries. In case the brush seizes between the teeth during interproximal cleaning, and a vigorous pull is exerted on the handle to release the brush, there is the danger that the wire breaks off at the edge of the passage hole.
Danger of breakage also exists during prolonged use of the brush, because the wire is flexed to and fro at the hole edge and is worn off. Removal of the broken-off brush sticking between the teeth is extremely difficult in such a case, and there is the hazard that the oral cavity is injured by the sharp, broken-off wire end.
The invention is based on the object of mounting the brush in a simple way, reliably and safe from breakage, at the handle, and avoiding the danger of injuries.
Due to the fact that the end of the bristle carrier, which latter usually consists of wire, is located in the molded part, the latter protects the user from injuries caused by the wire end. The molded part additionally protects the bristle carrier against being snapped off by bending and against breaking at the holding part of the handle. An object of the invention is to provide a structure that solves the task of preventing snapping or breaking off of the bristle carrier where it leads out of the molded part. In one form of the invention the molded part can be manufactured of a relatively hard synthetic resin wherein the bristle carrier is held more reliably than in a soft-elastic synthetic resin. In case of the latter, there is the danger that the bristle carrier, during use, will gradually work itself out of, or detach itself from, the synthetic resin.
Embodiments of the invention will be described in greater detail below with reference to the drawing wherein:
FIG. 1 is a longitudinal section through a device for interproximal cleaning,
FIG. 2 is a top view of the device in the viewing direction of arrow II in FIG. 1,
FIG. 3 is a lateral view of a modification of the brush of the device according to FIG. 1,
FIG. 4 is a top view of the brush of FIG. 3,
FIG. 5 is a lateral view, partially in section, of a preferred version of the brush of the device according to FIG. 1,
FIG. 6 is a longitudinal section through a modification of the device of FIG. 1, and
FIG. 7 shows a longitudinal section through another version of the device of FIG. 1.
The device illustrated in FIG. 1 comprises a stick-shaped handle 1 of which merely one end portion is shown, designed as a holder for an interdental brush (interproximal brush) 2. The illustrated handle end has a bolt thread 3 through which extend, in the axial direction, a groove 4 and, perpendicularly thereto, a passage bore 5, the diameter of the latter being larger than the width of the groove 4. A threaded sleeve 7 is threaded onto the bolt thread 3.
The brush 2 has a bristle carrier 10, formed in the usual way from a twisted wire loop, with bristles 11 and an end member 12 devoid of bristles. This end member 12 is cast into a cylindrical molded part 13 of a soft-elastic synthetic resin. A cross member 14, forming an abutment, is provided at the free end of the molded part 13, integrally with the latter, the two arms of this cross member tapering in a wedge shape toward the outside.
The diameter of the passage bore 5 is of a size adequate for being able to pass therethrough brushes 2 with the longest bristles 11 that can be conside
REFERENCES:
patent: 1598224 (1926-08-01), Van Sant
patent: 2189175 (1940-02-01), Jackson
patent: 2624062 (1953-01-01), Knoderer
patent: 3559226 (1971-02-01), Burns
patent: 4222143 (1980-09-01), Tarrson et al.
patent: 4319377 (1982-03-01), Tarrson et al.
Curaden AG.
Feldman Peter
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