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:
Jul. 05, 1994
Filed:
Jun. 17, 1992
Harry C Ralph, Kirkland, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
A variable orifice damper includes a sealed cylinder, a piston rod mounted for sliding movement along the axis of the cylinder carrying a piston head and a tail rod, the piston rod and tail rod extending from the interior of the cylinder outward beyond a corresponding support surface on the cylinder wall. The cylinder contains a cavity portion whose internal size varies along the cylinder axis located axially between two adjacent cavity portions of larger size than the intermediate cavity portion. The piston head has a surface whose cross sectional area varies along the axis of the cylinder and is adapted to pass through the cavity portion of variable size, the piston head and cavity portion defining a orifice of variable size therebetween. The piston rod has a bore containing a separator piston actuated by fluid passing the orifice and adapted to compress gas held in the bore.