Method for filling gas into sealed cylinder device
AssigneeTokico Ltd.
InventorToshiro Nagase
Life of this patent
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Abstract
A method for filling gas into a sealed cylinder device having a rod guide closing one end thereof and guiding a rod slidably therethrough comprising the steps of forming the rod guide to have a cavity consisting of a cylindrical portion to retain a seal therein and an inwardly divergent portion continuous with the cylindrical portion, displacing the seal inwardly so as to form an annular gap between the outer periphery of the seal and the wall of the divergent cavity portion, filling gas into the cylinder device through the annular gap, and displacing the rod outwardly to carry the seal therewith so as to displace the seal into the cylindrical cavity portion, whereby the seal is thereafter retained in its position due to gas pressure in the cylinder.
Claims6
A method for filling gas into a sealed cylinder device of the type including a cylinder having a closed first end, a rod guide disposed in a second end of said cylinder, a rod slidably extending through said rod guide into said cylinder, and an annular seal sealingly surrounding said rod and sealingly contacting said rod guide;
- said method comprising:
- forming said rod guide to have a cavity including a cylindrical portion sealingly receiving said annular seal and an inwardly divergent portion continuous with said cylindrical portion and opening into the interior of said cylinder;
- displacing said annular seal inwardly from said cylindrical portion of said cavity to said divergent portion thereof, to thereby form an annular gap between the outer periphery of said annular seal and the wall of said divergent portion;
- filling gas under pressure through said annular gap into the interior of said cylinder;
- and
- thereafter displacing said rod and thereby said annular seal outwardly until said annular seal contacts the wall of said cylindrical portion of said cavity and closes said annular gap, whereby said annular seal is retained in sealing position within said cylindrical portion by gas pressure within the interior of said cylinder.
Dependencies are inferred from the claim text.