1979-04-18
1981-02-24
Apley, Richard J.
Undertaking
272 62, 256 65, A63B 900
Patent
active
042523133
ABSTRACT:
A type of playground device has vertical or horizontal support members with pipes perpendicular to such wooden support members extending between and mounted on the support members. Each pipe has a sharpened circular edge on each end which extends into a relatively large diameter inner pipe receiving portion of a transverse opening in one of the wooden support members; the sharp edge engages the bottom of the opening with the other side of the wooden support member having a relatively large outer bolt head receiving opening communicating with the inner pipe receiving opening through a central relatively small diameter opening portion. A bolt extends through the opening portions, which are axially aligned, into a threaded plug near the end of the pipe and pulls the sharp end edge of the pipe into the wood of the wooden support member upon tightening of the bolt to provide a construction that is both strong and vandal proof and protrusion free.
REFERENCES:
patent: 2206581 (1940-07-01), Shapiro
patent: 2462321 (1949-02-01), Holmes
patent: 3524644 (1970-08-01), Kane
patent: 3814416 (1974-06-01), Munger et al.
patent: 3893776 (1975-07-01), Beattie
patent: 3969871 (1976-07-01), Ewers
patent: 4124317 (1978-11-01), Dauth
Apley Richard J.
Victor Stanley Inc.
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