Direct Response Valves (i.e., Check Valve Type) Patents (Class 137/511)
- Dividing and recombining in a single flow path (Class 137/512.1)
- One valve carries head and seat for second valve (Class 137/512.2)
- Diverse types (Class 137/512.3)
- Integral resilient member forms plural valves (Class 137/512.4)
- With common biasing means (Class 137/512.5)
- Mechanically interconnected (Class 137/513)