| 摘要 |
<p>676,181. Batteries. GENERAL MOTORS CORPORATION. Oct. 26, 1950 [Nov. 4; 1949], No. 26087/50. Class 53. A vent plug for a storage battery comprises a threaded body 22 having a partition 30 provided with a central opening through which the stem of a mushroom-like valve 36 passes. The stem of the valve is formed with projections 42 which engage the lower surface of the partition. Apertured closure plates 50, 56 are sprung into grooves in the body. The valve 36 is made of polyethylene or other resilient material so that it can lift under the pressure of gas. When the valve is being placed in position the projections 42 bend sufficiently to enable the stem to be passed through the opening in the partition 30. The body 22 is made of resilient material and the part 66 is tapered but becomes flattened when the plug is screwed into the battery cover so that a tight joint is produced without the use of a gasket.</p> |
