Plunger for a control valve of a servomotor

Details Plunger for a control valve of a servomotor Plunger for a control valve of a servomotor

1989-08-31

1990-11-20

Ostrager, Allen M.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, F15B 910

Patent

active

049709399

ABSTRACT:
A plunger (52) having a cylindrical body with a smooth surface (61) thereon which joins an semi-spherical atmospheric seat (62) with a conical surface (60) to define with a section (31) of bore (30) a flow path through which air is communicated from the environment to a rear chamber (20) without the creation of noise. The smooth surface (61) is made of a porous material (51) that absorbs sounds without substantially effecting the flow of air.

REFERENCES:
patent: 3727516 (1973-04-01), Myers et al.
patent: 4022112 (1977-05-01), Putt et al.
patent: 4450688 (1984-05-01), Boehm

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