Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1987-11-10
1989-05-30
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137541, 173169, 251900, F16K 1704
Patent
active
048341312
ABSTRACT:
A safety system for automatically preventing over pressure in the interior of a pneumatically operated tool supplied from a source of compressed air includes a safety relief valve detachably connected between the tool and the compressed air source. The safety valve includes a hollow housing having a relief port therein and a resettable valve member is mounted in the housing and movable to open and close the relief port in response to the level of air pressure supplied from the source of compressed air. The housing includes an access opening opposite the relief port and a removable stop member is provided to normally close the access opening and limit the movement of the valve member in a direction inwardly of the housing. The access opening is dimensioned to permit easy insertion and removal of the valve member into and out of the housing. A biasing spring is mounted on the valve member for maintaining an inner end of the member in engagement with the stop until an over pressure is encountered and when this occurs, the excessive air pressure becomes effective to move the valve member outwardly to open the relief port. Once the over pressure no longer obtains, the biasing spring is again effective to reseat the valve and close the relief port so that tool operation may be continued.
REFERENCES:
patent: 2233163 (1941-02-01), Fosnot
patent: 2607559 (1952-08-01), Forss
patent: 2639102 (1953-05-01), Ball
patent: 2713989 (1955-07-01), Bryant
patent: 3067770 (1962-12-01), Fancher
patent: 3451416 (1969-06-01), Nyberg
patent: 3545887 (1970-12-01), Kobnick
patent: 4273151 (1981-06-01), Nezworski
patent: 4441629 (1984-04-01), Mackal
Duo-Fast Corporation
Nilson Robert G.
LandOfFree
Safety system for pneumatic tools 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 system for pneumatic tools, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety system for pneumatic tools will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2145214