Joints and connections – Articulated members – Lockable at fixed position
Patent
1994-08-23
1995-12-12
Nicholson, Eric K.
Joints and connections
Articulated members
Lockable at fixed position
403100, 403117, 403325, 5 981, 5 983, 5 991, F16C 1110
Patent
active
054744040
ABSTRACT:
A foldable rail assembly includes a first shell including a first wall defining a cutout and two apertures, a second wall defining two apertures and a top formed between the first and second walls. A second shell includes a first wall defining two apertures and a passage, a second wall defining two apertures and a top formed between the first and second walls thereof. A lock defines two apertures and includes an upper portion and a lower portion of a greater length thus defining two shoulders. Two pins are inserted through the apertures defined in the first and second shells and the lock. Three springs are compressed between the lock and the second wall of the second shell. Two rails are pivotally linked to the first shell and each include an end with a block raised therefrom. The blocks are supported by the shoulders when the lock is against the first wall of the second shell. The blocks are not supported by the shoulders when the lock is moved against the second wall of the second shell through the cutout defined in the first wall of the first shell and the passage defined in the first wall of second shell.
REFERENCES:
patent: 4365908 (1982-12-01), Thiboutot
patent: 4499619 (1985-02-01), Kassai
patent: 4614454 (1986-09-01), Kassai
patent: 4811437 (1989-03-01), Dillner et al.
patent: 5211498 (1993-05-01), Huang
patent: 5239714 (1993-08-01), Huang
patent: 5293656 (1994-03-01), Chan
patent: 5353451 (1994-10-01), Hsiung
patent: 5358220 (1994-10-01), Yu-Kuang
Crandell Ralph F.
Jina Manufacturer Thai Co., Ltd.
Kim Harry C.
Nicholson Eric K.
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