Extendable wall sleeves

Details Extendable wall sleeves Extendable wall sleeves

1991-01-25

1993-02-02

Chilcot, Jr., Richard E.

Static structures (e.g., buildings)

Frangible section or means

52576, 52577, 249 43, 249 83, 249155, 138155, 285 4, 285298, 285303, E04G 1500

Patent

active

051828855

ABSTRACT:
A one-piece, unitary, molded resin wall sleeve precursor has two cup-shaped end sections of external diameter D1 each having a hollow transition section of enlarged diameter that connects the end section to a sleeve of internal diameter D1; one transition section has an outer diameter D2 and the other has an inner diameter just slightly larger than D2. D2 is appreciably larger than D1. A wall sleeve assembly of extended length is derived from two of these precursor members by cutting off the end sections; the precursor members can then be joined with a strong, inexpensive, welded joint to afford a long wall sleeve of consistent internal diameter.

REFERENCES:
patent: 1783605 (1930-12-01), Della
patent: 3867804 (1975-02-01), Wilson
patent: 3905845 (1974-04-01), Santoro
patent: 4211259 (1980-07-01), Butler
patent: 4296157 (1981-10-01), Conti
patent: 4625940 (1986-12-01), Barton

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