Piston machines or pumps characterised by having positively-driven valving

Child Classifications

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• F04B 7/0003 +3 CPC CPC only CPC only
• F04B 7/0019 +4 CPC CPC only CPC only
• F04B 7/0038 CPC only CPC only
• F04B 7/0042 +3 CPC CPC only CPC only
• F04B 7/0057 +2 CPC CPC only CPC only
• F04B 7/0073 CPC only CPC only
• F04B 7/0076 CPC only CPC only
• F04B 7/008 CPC only CPC only
• F04B 7/0084 +1 CPC CPC only CPC only
• F04B 7/02 the valving being fluid-actuated +4 CPC IPC+CPC Available in IPC and CPC
• F04B 7/04 in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports +1 CPC IPC+CPC Available in IPC and CPC