Gas spring with filler valve

摘要

A filler valve and fitting for a gas spring. The filler valve has a body slidably received in a cavity in a housing and movable between a first sealed position for retaining gas within a gas chamber in the spring and a second position for bleeding gas from the chamber to relieve pressure within the chamber. For charging the chamber with gas, a core valve is carried by the body. Preferably, the housing has an exterior configuration and size of a standard flow-through type coupling having a pair of exteriorly threaded portions separated by a central portion with parallel flats constructed and arranged for engagement by a tool to install and remove the housing. The body has opposed effective areas with the effective area adjacent an inlet in the housing being greater than the effective area adjacent the outlet for enabling gas within the chamber to be compressed to a pressure much greater than the supply line pressure. Preferably the ratio of effective areas ranges from about 4:1 to 8:1 and preferably about 6:1 to enable the gas in the chamber to be compressed up to a pressure of about six times the supply line pressure.