Locks – Special application – For closures
Patent
1996-05-10
1998-07-07
Meyers, Steven N.
Locks
Special application
For closures
70 77, 292128, 292228, E05B 6546, E05C 1910
Patent
active
057751404
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lock for cassettes of the type intended for the construction of drawer cabinets, each of which cassettes accomodates a drawer and comprises on one hand a rectangular frontal frame from which four walls extend, viz. a bottom wall, two side walls and an upper wall, and on the other hand a rear wall to which said walls are connected, and which frontal frame has substantially vertically positioned flanges in connection with said walls, the drawer in addition to a rear part comprising a bottom part, two side parts and a frontal part, which, along an upper edge, presents a longitudinal, forwardly projecting gripping flange having a hook- or hitchlike cross-sectional profile.
PRIOR ART
A cassette for a drawer cabinet of the sort generally described above is previously known from DE-A-3 905 843. In its basic embodiment, the cassette is provided with four male-like members on its underside, in the form of hook-shaped plates or sheet portions intended to be inserted and locked in cooperating holes in the upper side of a subjacent cassette. The cassettes are commercially available in different embodiments, in particular in embodiments with different heights, thereby enabling the user to erect drawer cabinets adapted to individual needs in a quick and flexible way. In the known cassette for drawer cabinets, the drawer is normally arranged to be guided by two guide rails which are placed on both sides of the drawer adjacent to on one hand each side wall and on the other hand the bottom wall. According to this embodiment, the drawer is retained in its position within the cassette by two projecting members which are formed on the underside of the bottom part of the drawer, in the vicinity of the frontal part of the drawer, in order to be locked behind a lower part of the frontal frame of the cassette as long as the drawer rests upon the cooperating guide rails. Only when lifting the frontal end of the drawer, so that the projecting members pass clear of the lower part of the frontal frame, the drawer can be pulled out to an outer end position. In its maximally pulled-out position, the drawer is retained in the cassette by an upper edge portion of the rear part of the drawer that engages behind an upper part comprised in the frontal frame of the cassette. For a complete removal of the drawer from the cassette, the frontal portion of the drawer is turned in an upward direction when the drawer is in the region of its maximally pulled-out position.
A disadvantage of the above-mentioned cassette is the necessity of lifting the drawer upwardly when it should be pulled out from its inner end position. In order to make such movements possible the opening in the frontal frame of the cassette has to be palpably wider than the drawer itself. For this reason the guidance of the drawer will be inaccurate. Among other things there will be a risk that the drawer bounces when it is subjected to shock movements, for instance if the cabinet is mounted in a vehicle or another mobile unit. The prior art arrangement of locking the drawer makes it further impossible to subsequently mount roller guide rails having an accurate guidance of the drawer.
Objects and Features of the Invention
The present invention aims at eliminating the abovementioned disadvantages of the previously known construction and provide a lock which is capable of retaining the drawer in its fully pushed-in position in the cassette without calling for a lifting of the drawer relative to the cassette when liberating and pulling the same out. Accordingly, a primary object of the invention is to provide a simple and cheep lock which on one hand in its locking position safely retains the drawer in its inserted position in the cassette and on the other hand, by a simple manipulation, liberates the drawer without calling for a lifting thereof relative to the cassette. In other words the drawer should be able to be pulled out to an outer end position by a simple linear pulling movement. Another object of t
REFERENCES:
patent: 970661 (1910-09-01), Stoddard
patent: 1082408 (1913-12-01), Conard
patent: 1126700 (1915-02-01), Bull
patent: 1638547 (1927-08-01), Myers
patent: 1874289 (1932-08-01), Haskins et al.
patent: 2010492 (1935-08-01), Karre
patent: 2251138 (1941-07-01), Knight
patent: 3031248 (1962-04-01), Jeeves
patent: 3161923 (1964-12-01), Crain
patent: 3208781 (1965-09-01), Appleberry
patent: 3288508 (1966-11-01), Maize et al.
patent: 3455590 (1969-07-01), Zerfoss
patent: 3918751 (1975-11-01), Blake
patent: 4401350 (1983-08-01), Fortune
patent: 5292191 (1994-03-01), Slivon
Borgstroms Platindustri AB
Meyers Steven N.
Pham Tuyet-Phuong
LandOfFree
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