Flexible or portable closure – partition – or panel – Roll type – With brake or stop
Reexamination Certificate
2000-03-06
2001-03-27
Stodola, Daniel P. (Department: 3634)
Flexible or portable closure, partition, or panel
Roll type
With brake or stop
C160S067000, C160S300000, C160S305000, C074S57700S
Reexamination Certificate
active
06206078
ABSTRACT:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable
BACKGROUND OF THE INVENTION
This invention relates generally to the field of awnings and specifically to a locking mechanism for an awning roller.
Awnings commonly include a canopy having one edge attached to a wall and an opposite edge attached to a roller. The roller rotates on an axle supported on support arms at each end of the roller. The support arms are pivotably attached to the wall. The roller rotates on the axle so that the canopy can be rolled on the roller for storage. The roller is spring loaded to facilitate rolling of the awning by a torsion spring, for example. It is desirable to lock the roller in position when the awning is in a stored or deployed position. In particular, roller locks are known that toggle between a “roll up” position, which prevents deployment and permits retraction of the canopy, and a “roll down” position, which prevents retraction and permits deployment of the canopy. Examples of roller locks are shown in U.S. Pat. No. 4,607,654 to Duda, U.S. Pat. No. 4,759,396 to Quinn, and U.S. Pat. No. 4,770,223 to Ouellette.
BRIEF SUMMARY OF THE INVENTION
The present invention provides a roller lock including an axle and a hub disposed for rotation on the axle and having a geared surface. A cap is mounted stationary relative to the axle. A pawl has two abutment surfaces and is mounted for rotation on the cap between a first position wherein one of the abutment surfaces engages the geared surface to prevent rotation of the hub in a first direction and a second position wherein the other abutment surfaces engages the geared surface to prevent rotation of the hub in a second direction.
A pawl pivot and lever shaft are mounted to the cap. A handle is provided for pivoting the lever shaft. A lever is mounted to the lever shaft and operated by the handle to engage and rotate the pawl. The geared surface is an interior surface of an annular ring. The hub is mounted on an end of a roller tube and the axial flange extends longitudinally away from the roller. The cap includes axial projections defining stops limiting rotational travel of the lever. A spring biases the pawl toward a respective one of the first or second positions to which the lever has rotated the pawl. A first spring mount projects radially from the shaft and a second spring mount is disposed at the pawl in an offcenter position with respect to a rotational axis of the pawl, wherein the spring is secured to the first and second spring mounts. The pawl includes shoulders for being engaged by the lever, the shoulders being positioned so that operation of the lever in one direction rotates the pawl in one direction and operation of the lever in another direction rotates the pawl in another direction to force the pawl to disengage when its direction is reversed. This assures the operator that the pawl has been disengaged from the teeth and the roller can be rotated in a direction corresponding to the position of the handle. The lever nests between the shoulders. The shoulders and lever are shaped and positioned such that the lever engages the shoulder to prevent rotation of the pawl beyond the neutral position unless the lever is rotated. The abutment surfaces are parallel, oppositely facing surfaces radially spaced from the pawl pivot. The lever includes a pair of parallel, spaced drive surfaces laterally offset from an axial centerline of the lever shaft. The cap and hub are provided with passages that can be aligned and further comprising locking pin that can be inserted in the aligned passages to prevent relative rotation of the cap and hub. A spring urges rotation of the roller in at least one direction.
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Photo of Lock For a Roller.
Lev Bruce A.
Pearne & Gordon LLP
Stodola Daniel P.
White Consolidated Industries, Inc.
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