One-piece pad holder for a floor buffing machine

Details One-piece pad holder for a floor buffing machine One-piece pad holder for a floor buffing machine

1992-01-13

1993-07-27

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Implements

Fabric

15 98, 15230, 51358, A47L 1114

Patent

active

052301206

ABSTRACT:
A one-piece dual durometer pad holder for use in a floor buffing machine has an outer radial portion and an inner radial portion. The outer radial portion is made from a first hardenable material having a first durometer hardness in its hardened state, and the inner radial portion is made from a second material having a second durometer hardness in its hardened state, with the second durometer hardness being less than the first durometer hardness. The outer and inner radial portions are interconnected in such fashion as to prevent shear failure between the two portions. The method of making the floor pad holder includes spin casting the outer radial portion from the first harden- able material, and then, while the first hardenable material is in its unhardened state, spin casting the second hardenable material in a single spinning operation. The materials are allowed to cure at the same time, forming a smooth and continuous bond between the two durometer portions of the pad holder. The pad holder thus formed is resistant to breakage when striking a hard or sharp object as well as to shear failure at the interface between the two materials forming the pad holder.

REFERENCES:
patent: 1809907 (1931-06-01), Newcomb
patent: 3684325 (1972-08-01), Okun
patent: 3742550 (1973-07-01), Wakefield
patent: 3823516 (1974-07-01), Christian
patent: 4307480 (1981-12-01), Fallen
patent: 4701970 (1987-10-01), Wilson
patent: 4709439 (1987-12-01), Warren et al.
patent: 4830807 (1989-05-01), Warren et al.

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