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:
Oct. 14, 1980
Filed:
Apr. 12, 1979
Robert B Foster, Riverside, CA (US);
Thermco Products Corporation, Orange, CA (US);
Abstract
For a vacuum pump, as used to maintain a partial vacuum in a diffusion furnace for chemical vapor deposition in intermittent runs wherein oil for the vacuum pump becomes contaminated by particulates, an apparatus for removal of particulates from oil for the vacuum pump comprises a settling tank, which is connected to receive oil from the vacuum pump, an oil pump, which is arranged to pump oil from the settling tank, means for filtering particulates from oil pumped from the settling tank, a plurality of oil valves, which are arranged to control flow of oil from the vacuum pump, through the settling tank, through the filtering means, and into the vacuum pump, means for operating the oil pump and opening the oil valves for timed intervals wherein oil flows from the vacuum pump, through the settling tank, through the filtering means, and to the vacuum pump, and means for coordinating the intervals with the runs so that each interval is initiated approximately when a run is terminated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile