Title:
VACUUM PUMPS
Document Type and Number:
Japanese Patent JPS52101703
Kind Code:
A
Abstract:
A vacuum pump, having a pumping chamber with intake and exhaust ports communicating therewith, is provided with an arrangement to insert a liquid lubricant into the pumping chamber. A sensing device is utilized to detect the pressure at the exhaust port, the sensing device permitting operation of a deactivating unit when the pressure at the exhaust port falls below a predetermined value, pressure below the predetermined value being indicative of improper pumping action in the pump. The deactivating unit acts to render inoperative the lubricant introducing arrangement when the sensing device detects a pressure at the exhaust port below the predetermined value, thus precluding the insertion of lubricant into the pumping chamber upon the occurrence of defective pumping action in the vacuum pump.
Inventors:
BITOOTASU ANDORIYUURISU
Application Number:
JP383577A
Publication Date:
August 26, 1977
Filing Date:
January 17, 1977
Export Citation:
Assignee:
CENTRAL SCIENTIFIC CO
International Classes:
F04C25/02; F01M11/10; F04C29/02; F16N29/02; (IPC1-7): F04C25/02; F04C29/02