About: http://webisa.webdatacommons.org/226615711

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	FIG. 3 illustrates another embodiment of the invention in which the inner coil spring element is replaced by a rigid metallic tube which may or may not be suspended by sponge rubber or other material to obtain a degree of overtravel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com