Exercise devices – Gymnastic – Play area climbing or traversing arrangement
Patent
1990-11-05
1992-09-29
Apley, Richard J.
Exercise devices
Gymnastic
Play area climbing or traversing arrangement
482 37, A63B 900
Patent
active
051510693
ABSTRACT:
A vertically extending structure comprises a component of playground equipment which is provided with one or more bars having free ends provided with internal threads and configured to penetrate wood, and one or more wooden support members for supporting the component. Each support member has at least one transverse opening extending therethrough. This transverse opening is axially aligned with and receives the free end of the bar, and includes three portions. One portion is inwardly-facing and is of a size and shape to matingly receive and envelop in a supporting fashion one of the free ends; a central portion has a transverse dimension less than that of the inwardly-facing portion; and a third portion is outwardly facing and has a greater transverse diameter than the central portion. The central portion receives the body a bolt, while the outwardly-facing portion receives the head of the bolt. The internal thread of the free end of the bar then threadably engages the threaded end of the bolt, whereby tightening of the bolt pulls the bar of the component into the support member and the innermost extent of the inwardly-facing portion of the transverse opening, to tend to prevent the removal of the component from the inwardly-facing portion if the bolt is removed. Alternatively, the component may include a frame member or the like having opposed, outwardly-extending protrusions, rather than a bar having free ends.
REFERENCES:
patent: 3969871 (1976-07-01), Ewers
patent: 4251069 (1981-02-01), Bellek
patent: 4252313 (1981-02-01), Skalka
patent: 4261665 (1981-04-01), Hsiung
patent: 4447055 (1984-05-01), Ahrens
patent: 4682772 (1987-07-01), Skalka
Popular Mechanics, Jun. 1981, pp. 130, 131, 133, 135.
The Washington Times Magazine, Jun. 26, 1987, p. M3.
Apley Richard J.
Crosby D. F.
Recreation Technology, Inc.
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