The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1995
Filed:
Feb. 22, 1994
Alistair G Taig, Edwardsburg, MI (US);
AlliedSignal Inc., Morristown, NJ (US);
Abstract
The ultrasonic hydraulic booster pump (10, 150) comprises a backing plate housing (11) defining a cavity (14) closed at one end (13) by an end cap (18), the end cap (18) having an inlet port (20) and the backing plate housing (11) having an outlet port (16). A diaphragm (35). (30) having a plurality of openings (33) is mounted between the end cap (18) and a spacer member (35) located within the cavity. A plurality of annular shaped piezoelectric rings or discs (60) are located within a ring housing (40) disposed within the spacer member A plug member (50) with a through opening (52) extends through a central through opening (44) in the ring housing (40) and includes a valve seat (58) disposed closely adjacent a solid central portion (34) of the diaphragm (30) , and the end cap (18) includes a valve seat (22) disposed closely adjacent the opposite side of the diaphragm (30). An alternating voltage applied to the piezoelectric rings (60) causes excitation thereof and resonance of the diaphragm (30) so that hydraulic fluid is pumped from the inlet port (20) and out the outlet port (16). The ultrasonic hydraulic booster pump (150) provides increased or boost pressure in a hydraulic braking system (100).