Valves and valve actuation – Impact type actuator
Patent
1974-07-09
1976-08-17
Nilson, Robert G.
Valves and valve actuation
Impact type actuator
251129, 251141, 137594, F16K 3110
Patent
active
039749983
ABSTRACT:
Spray coating apparatus featuring an improved solenoid valve construction in which response time of the valve actuation is improved by a free-traveling armature. The armature which is unrestrained by spring or other means has an annular shoulder portion which is engageable with an enlarged head portion of the pilot member of the valve. When the pilot is in its seated position, the dimensions of the valve are such that the armature must travel a short distance before its shoulder will impact against the pilot head thus allowing kinetic energy to build up as the armature travel is initiated by coil energization which enables the armature to effectively snap open the pilot upon impact despite spring and high fluid pressure resistance. A response time on the order of 4 to 8 milliseconds is enabled by the elimination of mechanical characteristics in the valve which would otherwise tend to limit the drive characteristics of the circuitry and is further aided by the ratio of travel of armature to pilot between full opened and full closed position which enables the necessary kinetic energy build up in the armature for opening and permits the pilot to close independently of the return of the armature to its unactivated position.
REFERENCES:
patent: 2222419 (1940-11-01), McCarty
patent: 2458123 (1949-01-01), Wasserlein
patent: 2557514 (1951-06-01), Ray
patent: 2735644 (1956-02-01), Bishofberger
patent: 3366288 (1968-01-01), Goldschein
patent: 3473780 (1969-10-01), Harms
patent: 3722623 (1973-03-01), Waldecker
patent: 3737141 (1973-06-01), Zeuner
Crown Cork & Seal Company, Inc.
Nilson Robert G.
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