Automatic draining back flow preventer for use with hydrant

Details Automatic draining back flow preventer for use with hydrant Automatic draining back flow preventer for use with hydrant

1993-06-04

1994-10-18

Michalsky, Gerald A.

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

137307, 137360, E03R 110

Patent

active

053559070

ABSTRACT:
An automatic draining back flow prevention apparatus, for use with hydrant structure, comprising tubular body structure having main passage structure between flow entrance and exit ports; the body structure having a first side port communicating with the passage structure; diaphragm structure carried by the body structure to be exposed to flow in the passage structure; a stopper in the passage structure cooperating with the diaphragm structure to pass forward fluid flow from the hydrant structure, while the diaphragm structure is positioned to block exit flow of fluid through the first side port, and to block back flow of fluid through the main passage structure when the diaphragm structure moves to unblock flow of fluid through the first side port; a first seat in the body structure exposed to the passage structure, and seating the first diaphragm as it moves to block flow of fluid through the first side port; and spring structure carried by the body structure to urge the stopper toward the first diaphragm, the spring structure and first diaphragm sized to allow the movement of the diaphragm to pass forward fluid flow when the pressure of the flow exceeds a predetermined level.

REFERENCES:
patent: 196384 (1877-10-01), Porteous
patent: 519728 (1894-05-01), McGowan
patent: 1786357 (1930-12-01), Miller
patent: 1987883 (1935-01-01), White et al.
patent: 2174743 (1939-10-01), Groeniger
patent: 2580199 (1951-12-01), Schmid
patent: 2598488 (1952-05-01), Bart
patent: 2598968 (1952-06-01), Boosey
patent: 2605781 (1952-08-01), Schmid et al.
patent: 2664096 (1953-12-01), Murdock et al.
patent: 2940464 (1960-06-01), Moen
patent: 3017896 (1962-01-01), Papacek
patent: 3155107 (1964-11-01), Woodford
patent: 3158170 (1964-11-01), Tubbs
patent: 3171423 (1965-03-01), Dillon
patent: 3770003 (1973-11-01), Uroshevich
patent: 3858599 (1975-01-01), Carlson
patent: 3885585 (1975-05-01), Carpentier
patent: 3952770 (1976-04-01), Botnick
patent: 4109671 (1978-08-01), Hughes et al.
patent: 4117856 (1978-10-01), Carlson
patent: 4653521 (1987-03-01), Fillman
patent: 4653522 (1987-03-01), Fillman et al.
patent: 4658852 (1987-04-01), Weingarten
patent: 4669497 (1987-06-01), Tenhengel
patent: 4726390 (1988-02-01), Franklin
patent: 4854339 (1989-08-01), Hoeptner, III
patent: 4909270 (1990-03-01), Enterante, Sr. et al.
patent: 4976279 (1990-12-01), King, Sr. et al.
patent: 5033500 (1991-07-01), Hoeptner, III
patent: 5094261 (1992-03-01), Giacomini
patent: 5217039 (1993-06-01), Hoeptner
patent: 5228470 (1993-07-01), Lair et al.
patent: 5228471 (1993-07-01), Hoeptner

Affiliated with

Also associated with

Rating

Automatic draining back flow preventer for use with hydrant does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic draining back flow preventer for use with hydrant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic draining back flow preventer for use with hydrant will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2365900