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:
May. 09, 1989
Filed:
Sep. 26, 1988
John F Hoying, Bellbrook, OH (US);
Stanley E Smith, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A hydraulic mount assembly includes a pair of mounting members connected to each other through a hollow elastomeric body. The body is closed by a resilient diaphragm so as to form a cavity for hydraulic damping fluid. A partition or plate is provided to divide the fluid filled cavity into two distinct chambers and the partition may include a decoupler. A primary chamber is formed between the partition and the interior wall of the hollow body. An expandable pneumatic bladder is mounted within the primary chamber. A secondary chamber is formed between the partition and the interior wall of the diaphragm. A pumping chamber is formed by the diaphragm and a sealed base plate. Hydraulic fluid passes through the orifice track between the two chambers providing the damping action. As the fluid enters the secondary chamber, the diaphragm expands. Expansion/contraction of the diaphragm within the sealed pumping chamber creates a supply of positive/negative pressure air. A control circuit governs flow of air between the pump and the pneumatic bladder, thereby selectively modulating the overall damping and dynamic rate characteristics in response to sensed vehicle operating conditions.