Dashpot for damping a closing movement of a hinged closure member
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Dec 26, 2024
app pub date -
Jun 20, 2024
filing date -
Jun 20, 2024
priority date (Note) -
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Abstract
A dashpot comprising a housing; a closed cylinder cavity filled with hydraulic fluid; a slideable piston within the housing and dividing the closed cylinder cavity into a high pressure compartment and a low pressure compartment; a one-way fluid passage allowing fluid flow from the low pressure compartment to the high pressure compartment when the dashpot is being opened; a first restricted fluid passage determining a closing speed of the dashpot; and a mechanism for compensating temperature-induced viscosity changes of the hydraulic fluid. The compensation mechanism comprises: a second restricted fluid passage and a needle valve comprising: an elongated body whose a length is temperature dependent. The tip of the needle valve has a shape so that fluid flow along the second restricted fluid passage is always possible.
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