Patent ID: 7288323

Claim:
An actuator housing comprising: a pair of flanges cooperatively arranged to form the actuator housing, each flange being coated with a resin-containing coating composition, and; an actuator diaphragm compressively retained between and in contact with the flanges, the actuator diaphragm having a rubber composition which comprises a copolymer rubber that is a copolymer of an unsaturated nitrile and a conjugated diene proportioned in a range of 10 to 45 parts by weight unsaturated nitrile to 55 to 90 parts by weight conjugated diene, a plasticizer for the copolymer rubber in an amount of 1 to 30 parts by weight plasticizer per hundred parts by weight of the copolymer rubber, wherein the plasticizer contained in the copolymer rubber is soluble in the resin of the coating composition in an amount of at least 0.1 gram plasticizer per 100 grams of coating composition resin, a silica filler in an amount of about 10 to about 80 parts by weight silica per hundred parts by weight of the copolymer rubber, a coupling agent in an amount from 0.1 to 20 parts per hundred weight of copolymer rubber, and a vulcanizing agent for the copolymer rubber in an amount of about 0.01 to about 10 parts per hundred weight of the copolymer rubber, held under sufficient compression to produce a bond between the diaphragm and the resin-containing coating composition on the flanges for increased retention of the actuator diaphragm between the flanges.