Valves and valve actuation – Fluid actuated or retarded – Dashpot or fluid controlled retarder or timer
Patent
1989-10-31
1990-06-19
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Dashpot or fluid controlled retarder or timer
251 3004, 251 65, F16K 31385
Patent
active
049346512
ABSTRACT:
This magnetically operated valve and timer assembly (30) can be used to open a feed line (14) leading to a spray head (22) within a chemical feed block (12) to dispense a chemical solution. The assembly (30) includes a valve (34) having a valve closure plunger (52) which is moved into the open position for a predetermined time under the attraction of a magnet assembly (66) mounted to the valve (34). The time period is determined by timer (36) which is connected to the magnet assembly. The timer (36) includes a cylinder (80) receiving a piston (100) in sliding relation, the piston including a head (102) a rearward shaft (104), having a knob (108), and a forward shaft (106) connected to the magnet assembly. The piston head (102) includes a tapered groove (122) for an annular cup seal (126) which moves into a position in the groove during the forward stroke to facilitate fluid flow past the seal ( 126) from one side of the piston to the other. The seal (126) moves into a different position in the groove (122) to preclude fluid flow past the seal during the return stroke so that fluid must flow through the head by way of restrictive passages (120) thereby retarding the return stroke. The restrictive passages (120) include a metering orifice (140) which is controlled by an adjustable needle (154). The piston chamber (92) includes an enlarged portion (96) to facilitate the timing of the return stroke.
REFERENCES:
patent: 3212751 (1965-10-01), Hassa
patent: 3376013 (1968-04-01), Mallett
patent: 3818928 (1974-06-01), Carsten
patent: 4424952 (1984-01-01), Thomson et al.
patent: 4819682 (1989-04-01), Van Marcke
Dema Engineering Company
Rosenthal Arnold
LandOfFree
Magnetically operated valve and timer assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetically operated valve and timer assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetically operated valve and timer assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2255314