| 摘要 |
<p>1,201,970. Relief valve. NATIONAL DISTILLERS & CHEMICAL CORP. 14 Nov., 1968 [28 Dec., 1967], No. 54156/68. Heading F2V. A pressure relief valve is characterized by a re-entrantly-bent inlet rim 14 forming the seat of the valve, and a cup-shaped plunger 20 formed with a solid resilient insert 22, preferably natural rubber, having a face 23 forced into engagement with the seat by a spring 30.</p> |
