公开(公告)号：IT8125152D0

公开(公告)日：1981-11-18

申请号：IT2515281

申请日：1981-11-18

Applicant: CONTROL DEVICES INC

Inventor： KRECHEL JOSEPH L ,  PURVIS MICHAEL J

IPC: F16K17/04 ,  F04B49/02 ,  F16K15/00 ,  F16K15/06 ,  F16K

Abstract: An unloader/check valve for use with an air compressor comprising a one-piece valve body, a valve member slidable in the body between open and closed positions, biased toward its closed position, the valve having a bleed for unloading the compressor when the valve member is in its closed position, and a dashpot arrangement for damping pulsations of the valve member.

公开(公告)号：CA1056793A

公开(公告)日：1979-06-19

申请号：CA274342

申请日：1977-03-21

Applicant: CONTROL DEVICES INC

Inventor： KRECHEL JOSEPH L ,  PURVIS MICHAEL J

IPC: F16K5/06

Abstract: A ball valve having a valve body, a main flow passage therethrough, a lateral bore extending generally perpendicularly through the passage, and a unitary ball valve member received in the lateral bore. The ball valve member has a spherical ball portion with an aperture therethrough and a pair of circular sealing heads, one on each side of the ball portion. Each of the sealing heads carries a seal which is slidably and sealingly engageable with the walls of the lateral bore. The sealing heads are of substantially equal diameter so that pressure forces acting on the ball valve member which tend to move the latter axially within the bore are balanced. A seal body is insertable into a main flow passage of the valve body from one end thereof for sealingly engaging the ball portion after the ball valve member has been installed in the lateral bore.