초록 ▼

A liquid level sensing device, particularly useful for apparatus designed to humidify oxygen gas being administered to patients undergoing respiratory therapy is disclosed. The liquid level sensing device detects the liquid level in a canister having an optical probe therein. A bracket, rotatable on

A liquid level sensing device, particularly useful for apparatus designed to humidify oxygen gas being administered to patients undergoing respiratory therapy is disclosed. The liquid level sensing device detects the liquid level in a canister having an optical probe therein. A bracket, rotatable on a frame of the device, carries a light source and a light sensing member for determining liquid level in the canister in conjunction with the probe. The hinged bracket engaging relation, and it also rotates out of probe-engaging relation and registry with the light probe. When the bracket is out of registry with the light probe, the canister may be removed and replaced. The bracket may be releasably retained out of probe-engaging relation by means of a snap fit structure.

대표청구항 ▼

In a liquid level sensing device for detecting the liquid level in a canister having an optical probe therein: a bracket carried by a frame and carrying a light source and a light sensing member for determining liquid level in the canister in conjunction with said probe, the improvement comprising,

In a liquid level sensing device for detecting the liquid level in a canister having an optical probe therein: a bracket carried by a frame and carrying a light source and a light sensing member for determining liquid level in the canister in conjunction with said probe, the improvement comprising, in combination: said bracket defining first and second parallel arms having free ends, hinge means between said parallel arms and frame whereby said bracket carrying said light source and said sensing means is permitted to rotate into registry with said probe for liquid level detecting operation in probe-engaging relation and also to rotate out of probe-engaging relation and registry with said probe, whereby the canister may be removed and replaced while the bracket is out of probe-engaging relation, the first arm of said bracket being more flexible than the second arm, and snap-fit means adjacent said first arm positioned to mate with corresponding snap-fit means on the frame, to releasably retain said bracket in a position out of probe-engaging relation.