ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,261, issued on April 14, was assigned to Edwards Ltd. (Burgess Hill, Great Britain).
"Shell stator for a vacuum pump" was invented by Robin Hockley (Burgess Hill, Great Britain) and Alan Ernest Kinnaird Holbrook (Burgess Hill, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A shell stator (12, 14) for a vacuum pump, the shell stator (12, 14) comprising: a seal groove (50, 52) formed in a surface of the shell stator (12, 14), the seal groove (50, 52) being defined by a first side wall (60), a second side wall (62) opposite to the first side wall (60), and a bottom surface (64) disposed between the first side wall (60) and the second sid...