Title: Self-boring bushing device

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1. A self-boring bushing device to provide a passage through a wall structure, without the use of a predrilled hole, or supporting means, wherein various cables and conduits are received and positioned therethrough, said device comprising:

a stud-like body having a multi-sided head member and an elongated, tubular shank member formed as an integral part thereof, wherein a longitudinal passage is disposed therein;

external threads formed along the shank member, said threads having a continuous cutting edge thereon; and

a plurality of boring teeth juxtapositioned co-axially about the passage opening and extending outwardly from said shank member, whereby said teeth forms a bore through said wall structure when said bushing device is screwed directly inwardly by means of said cutting threads, and said multi-sided head defines a wrench head, and each of said boring teeth includes a leading, apexed, boring edge formed along the outer edge of each tooth and a lateral cutting edge disposed in a normal manner thereto, said edges creating an annular kerf within the structure, thereby forming a core which is continuously received within said passage as said device is rotated; and wherein said core is readily removed therefrom to allow communication between each side of said wall structure, whereby said cables and conduits can pass therethrough, and including sealing means positioned within each open end of said passage and arranged to receive said conduits and cables under a sealed condition between each side of said structure.

2. A self-boring bushing device as recited in claim 1, wherein said sealing means comprise a pair of sealing plugs defined by a cylindrical body having one end thereof tapered to be received in said passage, the opposite end thereof being formed with an annular flange.

Other info:

Inventors: Rosan, Sr., Jose (San Juan Capistrano, CA, US)
Reece, Marvin P. (Dana Point, CA, US)

Application Number: 621641
Filing Date: 1975-10-14
Publication_date: 1976-10-05
Assignee: Rosan Hydraulics, Inc. (Newport Beach, CA)
Primary Class(es): 16/2.4 217/113, 285/40, 408/204
Other Classes:
US Patent Ref:

3349792

Oct, 1967

Larkin

285/40.

Other Refs: 222,515464,620

Apr, 1958	AU
Dec, 1968	CH

Primary Examiner: Kundrat, Andrew V.
Assistant Examiner:
Attorney: