Pumps – Expansible chamber type – Including valve assembly – disassembly – or inspection...
Patent
1987-01-06
1989-02-28
Freeh, William L.
Pumps
Expansible chamber type
Including valve assembly, disassembly, or inspection...
417 63, 417568, 417DIG1, 92170, F16J 1002, F04B 3914, F04B 2102
Patent
active
048080926
ABSTRACT:
The pump head liner of a small-size precision reciprocating metering pump, which has its application particularly in High Performance Liquid Chromatography (HPLC), is made of transparent material, preferably of synthetic sapphire or monocrystalline zirconium oxide. A pump head casing is designed such that a pump head liner is visually accessible. Cartridge-type check valve units abut onto the pump head liner on the one side, and onto a connecting adapter piece featuring an elbow liquid duct on the other. Pre-loading pressure for liquid sealing is exerted onto the connecting adapter piece by means of a compression screw which is secured in a clamp bracket or L-shaped angled clamping piece. The cartridge-type check valve units can be composed of transparent components and thereby are visually accessible. The opening and closing of a ball in a check valve unit can be monitored by an optical sensing system in order to obtain a feed-back signal for governing a control circuitry, having the purpose of compensating the influence of the specific compressibility of the liquid being pumped, upon the pumping efficiency of the displacement system under conditions of high and highest working pressures. An alternate embodiment has the pump head casing and mounting flange of one-piece construction. The pump head casing has a pair of spaced yoke arms to receive a pump head liner and vertical slots for mounting of check valve modules.
REFERENCES:
patent: 2719404 (1955-10-01), Hobson
patent: 3983958 (1976-10-01), Swearingen
patent: 4022245 (1977-05-01), Davis
patent: 4190617 (1980-02-01), Hope
patent: 4359312 (1982-11-01), Funke et al.
patent: 4417861 (1983-11-01), Tolbert
patent: 4453508 (1984-06-01), Groeger
patent: 4572056 (1986-02-01), Funke
patent: 4573886 (1986-03-01), Maasberg
patent: 4599047 (1986-07-01), Nowlin
patent: 4705459 (1987-11-01), Buisine
Edmund Scientific Publication, p. 36, published Feb. 3, 1987.
Freeh William L.
Saphirwerk Industrieprodukte
LandOfFree
Precision reciprocating metering pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Precision reciprocating metering pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precision reciprocating metering pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1362942