Linear actuator with radial support member

A radial support member for use with a linear actuator of the type comprising:

• an elongated substantially flat band having a column portion where turns of said band engage one another to form a helix about a longitudinal axis thereby forming an extractable and retractable column, said band further having a stored portion where its turns are separate from one another;
• a rotatable band guide member to guide turns of said band from its said stored portion into its said column portion;
• interlocking members to interlock the turns of the band in said column portion;
• a power actuator to cause rotation of said band guide member such that said extractable and retractable column may be extracted or retracted;
• a base carrying said power actuator, said band and said band guide member;
• wherein said radial support member comprises a main body and an attachment member fixed to said main body for attachment to said base, said main body configured for extending along an entire periphery of said extractable and retractable column,
• wherein said radial support member main body is further configured for extending longitudinally along said column about at least one full turn of said second band formed in a helix, for helping the extractable and retractable column resist radial forces due to the engagement of the extractable and retractable column against said radial support member main body.

A linear actuator comprising:

• an elongated substantially flat band;
• said band having a column portion where turns of said band engage one another to form a helix about a longitudinal axis thereby forming an extractable and retractable column, said band further having a stored portion where its turns are separate from one another;
• a rotatable band guide member to guide turns of said band from its said stored portion into its said column portion;
• interlocking members to interlock the turns of the column portion of the band;
• a power actuator to cause rotation of said band guide member such that said extractable and retractable column may be extracted or retracted;
• a base carrying said power actuator, said band and said band guide member;
• and
• a radial support member attached to said base and extending along an entire periphery of said extractable and retractable column;
• wherein said radial support member further extends longitudinally along said column about at least one full turn of said second band formed in a helix, for helping the extractable and retractable column resist radial forces due to the engagement of the extractable and retractable column against said radial support member.