Pumps – Expansible chamber type – Plural pumping chambers
Patent
1979-08-06
1980-12-30
Coe, Philip R.
Pumps
Expansible chamber type
Plural pumping chambers
277 59, F04B 102, F04B 2100
Patent
active
042420628
ABSTRACT:
An improved pressure and vacuum seal arrangement for a piston-type pump utilizing a reciprocating plunger disposed within a cylindrical sleeve. The cylindrical sleeve is provided with a pressure seal assembly adjacent the outer end thereof and a vacuum seal assembly adjacent the inner end thereof, along with an annular groove formed between the two seal assemblies to isolate the vacuum seal from the pressure seal. The annular groove, which extends around the entire inner peripheral surface of the cylindrical sleeve is in communication with the pump inlet. The pressure seal assembly comprises a generally "U"-shaped cup held between inner and outer retaining discs, and wherein the inner retaining disc is disposed with its inner peripheral edge surface in normal running contact with the surface of the plunger and with the inner disc consisting of polytetrafluoroethylene. The vacuum seal assembly comprises a carbon guide adjacent the inner end of the cylindrical sleeve and an adjacent vacuum seal sleeve formed of polytetrafluoroethylene. The polytetrafluoroethylene sleeve is disposed outwardly of the carbon guide and resilient means are provided for biasing the inner peripheral surface of the vacuum sleeve against the outer peripheral surface of the plunger.
REFERENCES:
patent: 3233554 (1966-02-01), Huber et al.
patent: 3238890 (1966-03-01), Sadler et al.
patent: 3744936 (1973-07-01), Sadler
patent: 4093240 (1978-06-01), Masuda et al.
Coe Philip R.
Haugen Orrin M.
Lear Siegler, Inc.
Nikolai Thomas J.
LandOfFree
Dual piston pump with pressure seal lubrication feature does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual piston pump with pressure seal lubrication feature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual piston pump with pressure seal lubrication feature will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-5309