The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2015
Filed:
Nov. 02, 2009
Masahito Kogame, Kyoto, JP;
Masahito Kogame, Kyoto, JP;
Shimadzu Corporation, Kyoto-shi, JP;
Abstract
A turbomolecular pump includes a drag pump unit constituted with a rotational cylinder portion disposed at a rotor and a fixed cylinder () disposed via a gap on an outer circumferential side of the rotational cylinder portion. The fixed cylinder () includes: a cylinder upper portion () locked to a base (); and a cylinder lower portion () connected to a discharge downstream side of the cylinder upper portion () via a groove () formed so that a break occurs when the rotational cylinder portion () breaks and a broken rotational cylinder portion () collides with the fixed cylinder () subjecting the fixed cylinder () to a rotational torque working in a direction matching the direction in which the rotational cylinder portion () rotates.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile