Hollow plastic product having a sound attenuator

Details Hollow plastic product having a sound attenuator Hollow plastic product having a sound attenuator

1995-08-23

1998-03-03

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181246, 181224, 181229, F01N 102

Patent

active

057238286

ABSTRACT:
A hollow plastic product having a sound
oise attenuating function is provided. The product includes a duct (1) defining a flow passage and extending over a length along a longitudinal axis, a resonator (1b) having an internal chamber (1b') and a connector (1c) which establishes a fluidic communication between the flow passage of duct (1) and the internal chamber (1b') of resonator (1b). The resonator (1b) serves to absorb or attenuate sound
oise created by the fluid flowing through the flow passage. The product is manufactured from the same parison at the same time and thus has a unitary structure. An improved method for manufacturing such a hollow plastic product is also provided.

REFERENCES:
patent: 4800985 (1989-01-01), Hanzawa et al.
patent: 5014816 (1991-05-01), Dear et al.
patent: 5317112 (1994-05-01), Lee
patent: 5349141 (1994-09-01), Horibe et al.
patent: 5424494 (1995-06-01), Houle et al.
patent: 5502283 (1996-03-01), Ukai et al.
S.J. Skaistis, "New Techniques Muffle Hydraulic Noise", Machine Design, vol. 51, No. 7, Mar. 1979, pp. 120-126.

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