Vibration isolating surface protector with high traction properties

• US 4,355,777 A
• Filed: 10/21/1981
• Issued: 10/26/1982
• Est. Priority Date: 12/11/1978
• Status: Expired due to Fees

• Current Assignee: James G. Greenstreet
• Original Assignee: James G. Greenstreet
• Inventors: Greenstreet, James G.
• Primary Examiner(s): Foss, J. Franklin
• Application Number:
  US06/313,410
• Time in Patent Office: 370 Days
• Field of Search: 248/188.9, 248/633, 248/346, 248/346.1, 248/632, 248/634, 248/615, 248/677, 248/188.8, 267/140.1
• US Class Current: 248/346.03
• CPC Class Codes: A47B 91/04 Elastic supports
• CPC Class Codes: B32B 2266/02 Organic
• CPC Class Codes: B32B 2307/56 Damping, energy absorption
• CPC Class Codes: B32B 25/04 comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/043; next to a bituminous or tarry layer B32B11/044; next to a water setting substance layer B32B13/042; next to a metal layer B32B15/06; next to a glass layer B32B17/063; next to a layer formed of natural mineral fibres or particles B32B19/043; next to a wood layer B32B21/045; next to a cellulosic plastic layer B32B23/046
• CPC Class Codes: B32B 25/20 comprising silicone rubber
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 7/022 Mechanical properties
• CPC Class Codes: F16F 1/44 loaded mainly in compression
• CPC Class Codes: F16F 2236/04 Compression
• CPC Class Codes: G10D 3/01 Endpins or accessories therefor

Abstract

This invention is related to a vibration isolating surface protector having high traction properties. A soft compliant substantially platelike foam cushion is bonded to a substantially rigid backing plate and the periphery of the cushion has an integrally coated compliant membrane. When an axial or oblique force is applied to the backing plate surface remote from the cushion, the cushion and membrane compress, yielding extraordinary traction properties.

Claims

1. A surface protection device comprising:

a flat substantially rigid backing plate of predetermined contour having front and rear surfaces, said rear surface having a recess means for the location of a cooperating load-source device, said front surface having a compliant soft resilient matching slab cushion in retentive intimate contact therewith, said cushion having disposed on edges thereof integral surrounding outer and annular inner thin skin-like compliant membrane portions arranged in symmetrical relationship, said outer and inner membrane portions respectively converging and diverging progressively away from said front surface of said plate at an angle between 1° and

10°

with respect to an axis normal to said front surface thereby forming a pressure sensitive hollow substantially conical frustrum by means of which said cushion and said membrane portions mutually cooperate to produce high frictional properties in conjunction with a working surface when light loads are applied in a direction approximately normal to said rear surface at said recess means.

2. A surface protection device according to claim 1 wherein the cushion is a synthetic foam, rubber-like material.

3. A surface protection device according to claims 1 or 2 wherein the membrane portions are a silicone rubber material.