| 摘要 |
A positional arm device is a series of multiple rods connected to each other by a spherical housing and ball joint with a spring-loaded locking piston providing a multiple position holding device serving as an anchor to hold tools in a certain position, and also as a connector between two object where a certain secure fixed position between the two objects is desired. The arm device has a spherical terminal rod, a plurality of intermediate rods and a terminal housing rod connected together by a spherical housing adjustably positioned and locked by a spring-loaded piston shaft engaging a sphere end retained within the housing, the piston shaft lockingly engaging one of a multiplicity of grooved indentations on the surface of the sphere end.
|
