Safety water-heater valve adjustment
AssigneeSit la Precisa S.p.A.
InventorsAlessandro Toniolo, Stefano Zanella
Life of this patent
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Abstract
A knob adjustment device, particularly for adjusting the temperature in valve units of a water-heating apparatus. The knob adjustment device is mounted so as to be rotatable about a rotation axis in a stationary housing of the valve unit and has a safety member for the unidirectional restraint of the knob adjustment device relative to the housing so as to oppose rotation of the knob adjustment device in a first direction of rotation about the axis, the knob adjustment device being free to rotate in the opposite direction of rotation.
Claims18
A knob adjustment device for adjusting the temperature in a valve unit of a water-heating apparatus, the valve unit having a rotation axis in a stationary housing, the knob adjustment device comprising a safety restraining member unidirectionally restraining the knob adjustment device relative to the housing so as to oppose rotation of the knob adjustment device in a first direction of rotation about the axis, the knob adjustment device being free to rotate in the other, opposite, second direction of rotation, the first direction of rotation of the knob adjustment device being associated with upward temperature adjustments so that the knob adjustment device is restrained with regard to the first direction of rotation to prevent increases in the temperature due to accidental rotation of the knob adjustment device.
A knob adjustment device for adjusting the temperature in a valve unit of a water-heating apparatus, the valve unit having a rotation axis in a stationary housing, the knob adjustment device comprising:
- a safety restraining member including a set of teeth on the knob adjustment device and a retaining element which is fixed firmly to the housing and can engage the set of teeth, the restraining member unidirectionally restraining the knob adjustment device relative to the housing so as to oppose rotation of the knob adjustment device in a first direction of rotation about the axis, the knob adjustment device being free to rotate in the other, opposite, second direction of rotation;
- and
- resilient means for urging the retaining element into engagement with the set of teeth, the resilient means including a resiliently deformable plate restrained, at a first end, on the stationary housing and carrying the retaining element at the opposite, second end.
A knob adjustment device for adjusting the temperature in a valve unit of a water-heating apparatus, the valve unit having a rotation axis in a stationary housing, the knob adjustment device comprising:
- a safety member unidirectionally restraining the knob adjustment device relative to the housing so as to oppose rotation of the knob adjustment device in a first direction of rotation about the axis, the knob adjustment device being free to rotate in the other, opposite, second direction of rotation, the safety member being selectively releasable to allow the knob adjustment device to rotate in the first direction of rotation and including a set of teeth on the knob adjustment device and a retaining element which is fixed firmly to the housing and can engage the set of teeth;
- and
- resilient means for urging the retaining element into engagement with the set of teeth, the resilient means including a resiliently deformable plate restrained, at a first end, on the stationary housing and carrying the retaining element at the opposite, second end.
A knob adjustment device for adjusting the temperature in a valve unit of a water-heating apparatus, the valve unit having a rotation axis in a stationary housing, the knob adjustment device comprising:
- a preselected angular sector;
- a safety member unidirectionally restraining the knob adjustment device relative to the housing so as to oppose rotation of the knob adjustment device in a first direction of rotation about the axis, the knob adjustment device being free to rotate in the other, opposite, second direction of rotation, the safety member being selectively releasable to allow the knob adjustment device to rotate in the first direction of rotation and including a set of teeth extending along the preselected angular sector of the knob adjustment device and a retaining element which is fixed firmly to the housing and can engage the set of teeth;
- a resiliently deformable plate restrained, at a first end, on the stationary housing and carrying the retaining element at the opposite, second end, the plate urging the retaining element into engagement with the set of teeth;
- and
- a push-button-like element, associated with the retaining element, for moving the retaining element away from the set of teeth, against the resilient force of the plate,
- wherein the safety member is movable so as to be released from the set of teeth in a direction substantially parallel to the axis of rotation, in opposition to the resiliently deformable plate.
Dependencies are inferred from the claim text.