Patent · US Active

Retractable wheel assembly

US7503439B2 · kind B2 · utility

48Cited by

21References

19Claims

0Family size

Assignee

Timothy J. C. O'Shea · US

Inventors

Timothy J. C. O'Shea · Seattle, US
Terence R. Ellard · Seattle, US
Wayne C. Higgins · Seattle, US

Key dates

Filing date	Feb 13, 2006
Grant date	Mar 17, 2009
Priority date	—
Expiry date	Oct 7, 2026

Classification

Technology area (CPC A)Human Necessities
CPC primaryA45C5/146
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A retractable wheel assembly (110) for a carrier (100) is disclosed wherein the wheels (120) are rotatably mounted in cowls (130), which are pivotably disposed in wheel wells (116L, 116R) on a housing. The cowls are connected with a cowl axle assembly (140) that includes a coil spring, preferably a constant force spring (150) that biases the cowls towards a retracted position. The constant force spring is connected to a retractable handle (104), preferably with a spring engagement member (160), such that extending the retractable handle will bias the cowls towards an extended position, wherein the wheels extend out of the wheel wells for use.

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