About: http://webisa.webdatacommons.org/415349469

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Mounted in the upper portion of the cylinder coaxially with the rod is a guide provided with a spiral slot throughout its length, said spiral slot having a steep pitch.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com