Fork lift trucks

Claim 1

A tensioning device for maintaining proper tension on a section of the hydraulic lines of a fork lift truck having a truck assembly; having a telescopic mast assembly, including a first mast member, a second mast member to which said first mast member is slidably attached, and a third mast member to which said second mast member is slidably attached and which is attached to said truck assembly; and having a piston including a first end for being operatively attached to said first mast member and including a second end for being operatively attached to said second mast member, said tensioning device comprising: (a) sheave means for guidingly receiving said section of said hydraulic lines; and (b) mounting means for mounting said sheave means to said first end of said piston of said telescopic mast assembly in such a manner that said section of said hydraulic lines is substantially maintained within the confines of said telescopic mast assembly regardless of the position of the mast assembly; said mounting means including a body member attached to said telescopic mast assembly, said body member including a first upwardly directed body portion and a second upwardly directed body portion; said mounting means including a head member, said head member including a first head portion slidably mounted on said first body portion and including a second head portion slidably mounted on said second body portion; said mounting means including a first spring member positioned between said first body portion and said first head portion, and a second spring member positioned between said second body portion and said second head portion, said first and second spring members being enclosed within said first and second head portions respectively.