Foldable frame with a locking device

Details Foldable frame with a locking device Foldable frame with a locking device

2007-09-11

2007-09-11

Ellis, Christopher P. (Department: 3618)

Land vehicles

Wheeled

Extensible

C280S646000

Reexamination Certificate

active

10972330

ABSTRACT:
A foldable frame includes spaced-apart first and second support rods, a first bar having a first end connected pivotally to the first support rod, a second bar having first and second ends connected pivotally and respectively to the second support rod and a second end of the first bar, a sleeve disposed slidably around the first bar and movable to a juncture of the first and second bars when the bars are unfolded so as to limit relative movement between the first and second bars, and a control unit having a cable connected to the sleeve for pulling the sleeve away from the juncture of the first and second bars so that the first and second bars can be folded.

REFERENCES:
patent: 1785342 (1930-12-01), Gilbert
patent: 2467579 (1949-04-01), Boudreau
patent: 3563592 (1971-02-01), Preston
patent: 4765645 (1988-08-01), Shamie
patent: 5226658 (1993-07-01), Huang
patent: 5288098 (1994-02-01), Shamie
patent: 5845925 (1998-12-01), Huang
patent: 6422586 (2002-07-01), Glover
patent: 6561536 (2003-05-01), Suzuki

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