Safety device for avoiding entrapment at a water reservoir drain

Details Safety device for avoiding entrapment at a water reservoir drain Safety device for avoiding entrapment at a water reservoir drain

1996-10-25

1997-11-25

Freay, Charles G.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 443, 417 33, 4504, 361 23, F04B 4906

Patent

active

056904762

ABSTRACT:
A safety device for avoiding entrapment at a water reservoir drain by using a vacuum operated switch to interrupt power to the reservoir pump whenever a blockage occurs. In addition, a manual reset switch requires human intervention to re-activate the reservoir pump once the blockage condition is removed.

REFERENCES:
patent: 2765743 (1956-10-01), Hollinshead
patent: 2933570 (1960-04-01), Tutthill
patent: 3292547 (1966-12-01), Ward
patent: 3679325 (1972-07-01), Yost
patent: 3702742 (1972-11-01), Russell
patent: 3716306 (1973-02-01), Martin, Sr. et al.
patent: 3999890 (1976-12-01), Niedermeyer
patent: 4070133 (1978-01-01), McCormick
patent: 4106469 (1978-08-01), Dey
patent: 4115878 (1978-09-01), Johnson et al.
patent: 4233694 (1980-11-01), Janosko et al.
patent: 4372226 (1983-02-01), Erlandsson
patent: 4453476 (1984-06-01), Erlandsson
patent: 4476889 (1984-10-01), Haynes
patent: 4620835 (1986-11-01), Bell
patent: 4661247 (1987-04-01), Weir et al.
patent: 4705629 (1987-11-01), Weir et al.
patent: 5167041 (1992-12-01), Burkitt, III
patent: 5347664 (1994-09-01), Hamza et al.
patent: 5466229 (1995-11-01), Elson et al.
Miller, B.J. The Development of Heart and Lung Machines Surgery, Gynecology & Obstetrics Mar. 1982 vol. 154, pp. 403-414.

Affiliated with

Also associated with

Rating

Safety device for avoiding entrapment at a water reservoir drain does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety device for avoiding entrapment at a water reservoir drain, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety device for avoiding entrapment at a water reservoir drain will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2101815