Valves and valve actuation – Fluid actuated or retarded – Dashpot or fluid controlled retarder or timer
Reexamination Certificate
2006-05-09
2006-05-09
Yu, Justine R. (Department: 3751)
Valves and valve actuation
Fluid actuated or retarded
Dashpot or fluid controlled retarder or timer
C251S054000, C251S129070, C251S129150
Reexamination Certificate
active
07040594
ABSTRACT:
When a plunger moves toward a side of a valve seat, an end face of a sealing member on a space side is separated from a surface of a seal housing groove, whereby a portion between a communication passage formed on an inner peripheral side of the sealing member is communicated with the space. At this time, an end face of the sealing member on a side of a damper chamber contacts the surface of the seal housing groove. However, since a part of a communication groove is communicated with the communication passage, the damper chamber is communicated with the communication passage through the communication groove. Accordingly, since the damper chamber is communicated with the space through the communication passage, a damping effect is not exerted.
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deVore Peter
Yu Justine R.
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