Brushing – scrubbing – and general cleaning – Implements – Scrapers
Reexamination Certificate
2001-06-18
2003-06-17
Warden, Sr., Robert J. (Department: 1744)
Brushing, scrubbing, and general cleaning
Implements
Scrapers
C015S236010, C015S235300, C015S235400
Reexamination Certificate
active
06578229
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a hand-held device for removing joint fillers, particularly joint sealants, from joints, comprising a handle region for a hand of a user and a peeling element at the front.
BACKGROUD OF THE INVENTION
In the field of, in particular, sanitation, floor tile and cladding tile joints are frequently closed off especially between floor and wall by joint sealants of, for example, silicon. However, with time there is a requirement to refill joints of that kind with a joint sealant if the old joint sealant has become defective. For that purpose it is necessary to remove the old joint sealant as completely as possible from the joint to be newly grouted.
Conventional metal tools are frequently used for that purpose, for example spatulas, screwdrivers and such like. The removal of joint sealants with tools of that kind is, however, very inconvenient and laborious and moreover scratching of the underlying surface, for example the wall adjoining the floor tiles, often occurs. In addition, there is also a risk of injury for the user especially if sharp-edged metal tools are used. Other known approaches to the problem have a chemical basis and cause separation of the joint sealant, which frequently consists of silicon. However, these chemical substances are similarly connected with risks for the user, as they contain hazardous, corrosive, irritative and/or solvent-loaded substances. Moreover, there is a subsequent problem of disposal.
There is already knowledge of a hand-held device, according to the category in question, of plastics material, the front end of which has a peeling element formed by two differently designed blade-shaped elements. In that case it is necessary to penetrate the joint sealant by the first blade-shaped element, which runs to a point, and to quasi slit open the joint sealant along the entire joint, wherein this expediently has to take place at both side edges of the joint. Subsequently the hand-held device is then brought into a different position and the thus preliminarily loosened joint sealant is removed or peeled from the joint by the second blade-shaped element. Even if this known hand-held device offers advantages relative to the above-described approaches, it is, as before, worthy of improvement. Thus, with this hand-held device a substantial amount of time is still necessary for removal of the joint sealant from a joint because, as described above, the hand-held device has to be guided along the joint more than once in order to remove the joint sealant from the joint. Moreover, an entirely faultless removal is guaranteed only if the hand-held device is positioned exactly, especially in the first cutting process. A further disadvantage is that the known hand-held device has two curved blades which do not allow the mass, which is to be removed, to be fully reached in corner regions. Moreover, the shape is not optimal and the sealant is often only partially slit.
A hand-held device of the category in question is also known from German Utility Model DE-U-94 22 011. This hand-held device has at its tip a blade which can be pressed together, in correspondence with the joint width to be dealt with, with formation of a curved peeling element. A disadvantage of this prior known hand-held device is that a peeling effect can be achieved only with a pushing action.
It is the object of the invention to so improve a hand-held device according to the category in question that not only a pulling, but also a pushing, action is possible.
SUMMARY OF THE INVENTION
In accordance with the invention this object is met by a hand-held device of the kind denoted in the introduction in that the peeling element is constructed as a peeling beak which runs to a point and is open at the back while forming a further beak region.
The hand-held device according to the invention is, for removal of joint sealant from a joint, simply inserted in a joint so that the two side flanks of the peeling beak lie approximately at the two areas bordering the joint and subsequently the hand-held device is moved along the joint, preferably by pushing, whereby the joint sealant is released from the substrate in one working step in the vicinity of both joint flanks. Alternatively, the hand-held device can also be moved, without great exercise of force, by pulling; in this case, too, the side-flanks of the peeling beak then lie at both edge regions of the joint and ensure a largely complete detaching of the joint sealant in one working step. Through this possibility of using the hand-held device alternatively in the afore-described manner, a very flexible working results so that even corners with difficult access can be freed of joint sealant without problems. The device is thus particularly suitable, without modification, for both left-handed persons and right-handed persons. Since no protruding sharp-edged cutting edges are present there is also virtually no risk of injury for the user. Due to the peeling beak being constructed to be open at the back, detached joint sealant can issue from the hand-held device at the back so that removal thereof along an entire joint is possible in problem-free manner without interruption of the peeling process, because the detached mass issues rearwardly from the hand-held device. It is of particular further advantage in that case that by virtue of the construction of a further beak region at the beak end open at the back, the device can also be moved by pulling, whereby peeling then takes place by way of this beak region.
In an advantageous embodiment it is proposed that the two side flanks of the peeling beak are arranged at an angle of about 65° C. relative to each other. This facilitates working particularly in corner regions, for example in joints between a floor surface and a wall surface.
Handling can be further substantially improved if the peeling beak at the top passes over at the end of the side flanks into a manipulating region. The manipulating region in that case serves, apart from the handle region equally present, for the support thereon of, for example, the thumb of a user's hand whilst the hand-held device can be fully gripped in the handle region by the remaining fingers and the palm.
It has proved particularly favourable in ergonomic terms if the manipulating region passes over into the handle region, which is formed to be narrowed.
The functional capability of the hand-held device can be further enhanced if the end opposite the peeling beak is constructed as a spatula. It is possible with this spatula to, for example, directly remove the last residue of the joint sealant from smooth surfaces without needing an additional spatula for that purpose.
In order to even further improve the handling it is with advantage proposed that the manipulating region and/or the handle region is or are provided with furrow-shaped protrusions for the thumb or a finger of a hand of a user. In that case the furrow-shaped protrusions in the manipulating region serve the purpose of positioning the thumb of the user's hand when the hand-held device is used for actual removal of the joint sealant from a joint, whilst the protrusions in the handle region serve the purpose of positioning the thumb when the hand-held device is used as a spatula.
Preferably, the protrusions are formed in trough-shaped regions.
Finally, it is proposed that the hand-held device consists of plastics material and, in particular, of a plastics material which as far as possible is stable and low in abrasion. The risk of scratching the underlying surface adjacent to the joint is thereby securely avoided. Moreover, the hand-held device can be produced simply and economically. The hand-held device can, in the alternative, obviously also consist of metal or other materials.
REFERENCES:
patent: 3744079 (1973-07-01), Krause
patent: 3846060 (1974-11-01), Otis
patent: 3892039 (1975-07-01), Fisher
patent: D314696 (1991-02-01), Lucarelli
patent: D332901 (1993-02-01), Campbell
patent: D333217 (1993-02-01), Gingras
patent: D413445 (1999-09-01), deBlois et al.
Duhm Lydia
Dziallas Michael
Lepsius Tilwin
Majolo Martin
Swieten Roy Van
Balsis S
Harper Stephen D.
Henkel Kommanditgesellschaft auf Aktien
Hill Gregory M.
Warden, Sr. Robert J.
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