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Priority to JP1985130687UpriorityCriticalpatent/JPH0227759Y2/ja
Priority to DE3603721Aprioritypatent/DE3603721C2/de
Publication of JPS6237691UpublicationCriticalpatent/JPS6237691U/ja
Priority to US07/153,569prioritypatent/US4796924A/en
Priority to US07/228,936prioritypatent/US4978148A/en
Application grantedgrantedCritical
Publication of JPH0227759Y2publicationCriticalpatent/JPH0227759Y2/ja