| 摘要 |
725,363. Intake silencers. GENERAL MOTORS CORPORATION. April 14, 1953 [April 23, 1952], No. 10110/53. Class 7 (2) [Also in Group XXVIII] Resonance chambers 18, 19, 27 of a combined air intake filter (see Group XXVIII) and silencer unit 10 suitable for use on carburetters are located coaxially of a central clean air outlet 16 and sound waves gain access to said chambers 18, 19, 27 through an annular passage 17 formed by walls 13, 14, apertures 34 in the wall 14 and apertures 36 in the base 37 of the chamber 27 which is closed at its upper end by the cover 39 of the unit and is lined with sound absorbing material. |
