Patent · US Active

Counterbalance mechanism for bottom-hinged aircraft fuselage doors

US9033277B2 · kind B2 · utility

8Cited by
9References
23Claims
0Family size

Assignee

Inventor

Key dates

Filing dateNov 20, 2012
Grant dateMay 19, 2015
Priority date—
Expiry dateMay 21, 2033

Classification

  • Technology area (CPC E)Fixed Constructions
  • CPC primaryE05D13/123
  • WIPO fieldTransport
  • WIPO sectorMechanical engineering

Abstract

A counterbalance mechanism for counterbalancing weight of a bottom-hinged door (such as a clamshell-type airstair door of an aircraft) includes an operator handle, a hoist rod pivotally connected at one end to the operator handle and at an opposite end thereof to the door near a bottom region thereof. A force accumulator assembly is provided which includes a force biasing member which accumulates and dissipates a bias force when opening and closing the door, respectively, to provide mechanical counterbalance to the weight of the door. A bellcrank assembly operatively connects the operator handle to the force accumulator. In such a manner, weight counterbalancing of the door is achieved.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.