Liquid level detecting device
AssigneeHitachi Construction Machinery Co., Ltd.
InventorsMasashi SATOU, Masashi YAMASHITA, Katsutaka HARA, Hideyuki HAMANO
Life of this patent
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Abstract
A liquid level detecting device (21) includes a venting tube (27) located on an upper side (other side) of a case (22) opposite a water flow hole (25) and an ultrasonic sensor (23) and provided so as to penetrate a side surface portion (22A) of the case (22). In addition, the venting tube (27) is provided with external venting holes (28) that are open outward of the case (22) and an internal venting hole (29) that is open on the upper side (other side) of the case (22) within the case (22) and in communication with the external venting holes (28).
Claims5
A liquid level detecting device comprising:
- a tubular case with a water flow hole allowing a liquid to flow into the case;
- and
- an ultrasonic sensor provided on one side of the case and oscillating and receiving ultrasound, the liquid level detecting device further comprising
- a venting tube located on other side of the case opposite the water flow hole and the ultrasonic sensor and provided so as to penetrate a side surface portion of the case, wherein
- the venting tube is provided with an external venting hole that is open outward of the case and an internal venting hole that is open on the other side of the case within the case and in communication with the external venting hole.
Dependencies are inferred from the claim text.