Check valve for vacuum sewage pipe and vacuum sewage system

Details Check valve for vacuum sewage pipe and vacuum sewage system Check valve for vacuum sewage pipe and vacuum sewage system

2006-10-19

2011-10-04

Hepperle, Stephen M (Department: 3753)

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

C137S527200, C137S527800, C251S092000, C251S093000, C251S100000, C251S101000, C251S111000, C251S082000

Reexamination Certificate

active

08028715

ABSTRACT:
The present invention provides a check valve for use in a vacuum sewage pipe. The check valve includes a body having a sewage inlet and a sewage outlet to be coupled to the vacuum sewage pipe, a flap valve element disposed in the body and rotatably supported by a first shaft, and a closing mechanism. The closing mechanism can keep the flap valve element in a closed state so as to allow the flap valve element to function as a gate valve. The closing mechanism can also limit an opening degree of the flap valve element so as to allow the flap valve element to function as a check valve.

REFERENCES:
patent: 655741 (1900-08-01), Scott
patent: 1811611 (1931-06-01), Carlson
patent: 2999666 (1961-09-01), Sjogren
patent: 3177894 (1965-04-01), Camp
patent: 3730884 (1973-05-01), Burns et al.
patent: 4477051 (1984-10-01), Ben-Yehuda
patent: 4637425 (1987-01-01), Petersen
patent: 4706706 (1987-11-01), Page et al.
patent: 4887792 (1989-12-01), Kuo
patent: 5083885 (1992-01-01), Ushitora et al.
patent: 5622205 (1997-04-01), Petersen
patent: 5746246 (1998-05-01), Yokota et al.
patent: 6152173 (2000-11-01), Makowan
patent: 6314993 (2001-11-01), Matthews et al.
patent: 28-12077 (1953-12-01), None
patent: 03-247827 (1991-11-01), None
patent: 09-144120 (1997-06-01), None
patent: 10-168999 (1998-06-01), None
International Search Report of PCT/JP2007/070215, date of mailing Feb. 12, 2008.

Affiliated with

Also associated with

Rating

Check valve for vacuum sewage pipe and vacuum sewage system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Check valve for vacuum sewage pipe and vacuum sewage system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Check valve for vacuum sewage pipe and vacuum sewage system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4282761