JPH0375331U

JPH0375331U -

Info

Publication number: JPH0375331U
Application number: JP13707989U
Authority: JP
Priority date: 1989-11-27
Filing date: 1989-11-27
Publication date: 1991-07-29

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す断面図、第２
図は従来の技術を示す断面図、第３図は他の従来
の技術を示す断面図である。１……ピストンボデイ、２……ピストンロツド
、３……ピストンブロツク、４……上部圧力室、
６……軸孔、７……下部圧力室、８……連通孔、
９……開口端、１０……弁体、１０ａ……頭部、
１０ｂ……軸部、１２……シールリング（封止手
段）、１５……フランジ（抜け止め手段）。 Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a sectional view showing a conventional technique, and FIG. 3 is a sectional view showing another conventional technique. 1... Piston body, 2... Piston rod, 3... Piston block, 4... Upper pressure chamber,
6...Shaft hole, 7...Lower pressure chamber, 8...Communication hole,
9... Opening end, 10... Valve body, 10a... Head,
10b...Shaft portion, 12...Seal ring (sealing means), 15...Flange (removal preventing means).

Claims

[Scope of utility model registration request]

A piston block consisting of a piston body and a piston rod is formed with a shaft hole whose one end opens into one pressure chamber and a communication hole which communicates the shaft hole with the other pressure chamber, and the opening and closing of the shaft hole is operated from the outside. In a possible gas spring, the two pressures are applied between the head that controls opening and closing of the shaft hole at the open end on the side of one pressure chamber of the shaft hole, and the inner periphery of the shaft hole facing the communication hole. inserting a valve body having a shaft portion with a reduced diameter to form a passage between the chambers, and causing the shaft portion of the valve body to protrude through a sealing means in the shaft hole;
A gas spring characterized in that a stopper means is provided at the end of the protruding shaft portion to prevent the valve body from being pulled out toward the one pressure chamber.