Chester L Mitchell

US Patent:

52982173, Mar 29, 1994

Filed:

Feb 28, 1992

Appl. No.:

7/825243

Inventors:

Chester L. Mitchell - Covina CA

Assignee:

Mitchell Rubber Products, Inc. - City of Industry CA

International Classification:

B29C 4500

US Classification:

26433113

Abstract:

Compositions and designs useful for fabricating safety cushion and mat assemblies which have effective protection against injuries to persons falling from a height up to seven feet are disclosed. The safety cushion compositions have a shore hardness of about 68, comprises an ethylene/propylene rubber, an activator, an accelerator, a plasticizer, a vulcanizer, a filler, a processing aid agent and optionally a colorant or a whitener. In addition, compositions useful for fabricating a reinforced rubber anchor for securing the safety cushion and mat assemblies to the ground are disclosed. The rubber anchor composition has a shore hardness of about 73 and comprises a natural rubber, a processing aid agent, a plasticizer, a filler, an antioxidant, an antiozonant, an activator, an accelerator, a vulcanizer, an inhibitor and optionally a colorant or a whitener. Methods of fabricating the safety cushion, mat assemblies and securing anchors described above improves the fabricating process so that larger pieces of safety cushion can be molded and that the composition material does not stick to the mold thereby increases production efficiency.

US Patent:

54289351, Jul 4, 1995

Filed:

Sep 10, 1992

Appl. No.:

7/943361

Inventors:

Chester L. Mitchell - Covina CA

International Classification:

F16B 1900
F16B 1302

US Classification:

52698

Abstract:

Compositions and designs useful for fabricating safety cushion and mat assemblies which have effective protection against injuries to persons falling from a height of up to twelve feet are disclosed. The rubber anchor composition has a shore hardness of about 73 and comprises a natural rubber, a processing aid agent, a plasticizer, a filler, an antioxidant, an antiozonant, an activator, an accelerator, a vulcanizer, an inhibitor and optionally a colorant or a whitener. Moreover, the rubber anchor comprises a rounded head portion with a diameter of about 1. 5-2. 2 inches and a thickness of about 0. 15-0. 5 inches; a bolt portion of about 3-6 inches in length, and a diameter of about 0. 4-0. 8 inches, preferably the bolt portion further has indentations. In addition, preferably a metal washer is embedded in the bottom of the rounded head portion to provide further anchoring support to prevent the impact attenuation safety cushion and system from being pulled up from the ground.