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Control mechanism for tambour-style door closures

Imported: 24 Feb '17 | Published: 06 Jan '04

David A. Hoff

USPTO - Utility Patents

Abstract

A control mechanism for tambour-type door closures helically wound about a winding sleeve for use in combination with cabinetry and including a worm/pinion gear combination releasably locked against free rotation, with controlled rotation of the worm facilitating adjustment of spring tension for controlled ongoing smooth operation of the tambour door closure between open and closed dispositions. The worm/pinion gear combination is coupled to a coiled spring which is helically wound about the tambour door winding spindle with one end of the coil spring being anchored to the rotatable winding spindle means, and with the other being coupled to and fixed for controlled rotational movement with the pinion component of the worm/pinion gear combination. Controlled rotatable motion of the worm is facilitated through the clutching action of the knurled end terminal of the worm gear shaft. The closed position of the tambour door is held against the stored tension of the coil spring by means of a resilient detent member projecting into the lateral guide track for engagement with components of the door panel components.

Description

Other and further objects of the present invention will become apparent to those skilled in the art upon a study of the following specification and accompanying drawings.

IN THE DRAWINGS

FIG. 1 is a view of the top, front and side panels of a cabinet incorporating the control mechanism for tambour door closures in accordance with the present invention;

FIG. 2 is a detail view of the top of the cabinet structure, with a portion cut away to illustrate the manner in which the tambour door and control mechanism are received within the cabinet;

FIG. 3 is a view taken from beneath the cabinet structure with the tambour door having been removed from the spool, and illustrating the spring tension adjustment means;

FIG. 4 is a view taken from beneath the cabinet structure, and wherein the tambour door is wound onto and held by the winding spool and illustrating the manner in which the spring tension adjustment means may be hand manipulated;

FIG. 5 is an assembled view of the tension adjustment mechanism together with an integrated fragmentary portion of the vertical track;

FIG. 6 is a side and isometric view of the rainbow shaped detent and an integrated segment of the vertical channel, illustrating the pinch point employed near the bottom of the vertical guide, to retain the door in its down or closed position;

FIG. 7 is a view, in exploded disposition, comprising the housing and control mechanism components utilized in the spring tension adjustment means of the present invention; and

FIGS. 7A and 7B are fragmentary elevational views, with FIG. 7A shown in exploded disposition, each serving to illustrate the components and the manner in which the control mechanism functions and locks in place in a typical application.

Claims

1. In a combination, a control mechanism for tambour type closures operatively received within a cabinetry enclosure, with said cabinetry enclosure comprising frame means with wall panels secured thereto for creating said enclosure and with at least one of said wall panels having a tambour receiving access opening formed therein, and with said tambour type closure including a flexible door panel wound about a winding spool means mounted for relative rotation with spindle means coupled to said frame means, and manually operated spring tension adjustment means coupled to said frame means, with said spindle means comprising a rotatable winding spindle; the improvement comprising:

2. The combination of claim 1 wherein said flexible door panel is wound about said coil spring so as to conceal said coil spring.

3. The combination of claim 1 wherein a free clevis end of said coil spring is passed through a clevis-receiving bore formed in a body of said pinion gear.

4. The combination of claim 1 wherein said releasable locking means includes at least one latching dog mating with said worm, and wherein said latching dog is mounted stationary with said frame means.

5. In combination, a control mechanism for tambour type closures operatively received within a cabinetry enclosure, with said cabinetry enclosure comprising frame means with wall panels secured thereto for creating said enclosure and with at least one of said wall panels having a tambour receiving access opening formed therein, and with said tambour type closure including a flexible door panel wound about a winding spool means mounted for relative rotation with spindle means coupled to said frame means, and manually operated spring tension adjustment means coupled to said frame means, with said spindle means comprising a rotatable winding spindle; the improvement comprising:

6. In combination, a control mechanism for tambour type closures operatively received within a cabinetry enclosure, with said cabinetry enclosure comprising frame means with wall panels secured thereto for creating said enclosure and with at least one of said wall panels having a tambour receiving access opening formed therein, and with said tambour type closure including a flexible door panel wound about a winding spool means mounted for relative rotation with spindle means coupled to said frame means, with said spindle means comprising a rotatable winding spindle, with the control mechanism comprising: