Patent ID: 11909338
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An electrical current generating device comprising a body with a top end surface and a bottom end surface, a shaft bore formed around a longitudinal axis of said body and extending through said end surfaces, said end surfaces lying in parallel planes which are perpendicular to said axis, said top end surface being formed with a rim wall centered around said axis and extending substantially axially therefrom, wherein said rim wall has a distal top surface lying in a plane parallel to said planes of said end surfaces, a holder affixed to said body against said bottom end surface and having a wall portion defining a cavity facing said bottom end surface, a piezoelectric element affixed in said cavity and having a pressure receiving portion exposed to said bore, a vibration pin having a shaft portion slidably mounted in said bore and having a distal end lightly engaging said pressure receiving portion of said piezoelectric element, said shaft portion further having a disc shaped head having a planar pressure face and being formed on a proximal end of said shaft portion, wherein said pressure face is spaced above said distal top surface of said rim wall, a flexible membrane affixed to said body and overlying said pressure face and said distal top surface, a generally conically shaped funnel structure affixed to said upper end portion of said body for funneling energy waves onto said membrane, and positive and negative wiring affixed to said piezoelectric element and extending out of said cavity.