Measuring and testing – Hardness – Scleroscope or rebound
Patent
1994-03-25
1995-02-21
Chilcot, Jr., Richard E.
Measuring and testing
Hardness
Scleroscope or rebound
G01N 300
Patent
active
053905350
ABSTRACT:
A drop test apparatus (10) for testing the resiliency of playground surfaces (12) includes a drop module (14) and a release mechanism (16) for holding the drop module (14) at an elevated reference height and releasing the drop module (14) to fall to the surface (12). Vertically-extending guide elements (18) guide and maintain the drop module (14) in a constant attitude from release until surface (12) impact. A support structure (24) extends between the guide element's upper (20) and lower (22) ends and holds the guide element (18) in a generally vertical orientation above the surface (12). Both the guide element (18) and support structure (24) comprise a plurality of interconnecting collapsible and disassemblable parts allowing a single person to rapidly convert the support structure (24) and the guide element (18) between the operational surface-testing configuration and a compact configuration for convenient transport.
REFERENCES:
patent: 161737 (1975-04-01), Beardslee
patent: 1491990 (1924-04-01), Kindervater
patent: 2740286 (1956-03-01), De Vost et al.
patent: 3426578 (1969-02-01), Bergs et al.
patent: 3888108 (1975-06-01), Brands
patent: 3946598 (1976-03-01), Towne et al.
patent: 4020672 (1977-05-01), Safford
patent: 4856319 (1989-08-01), Hogan et al.
Parry Leslie R.
Smock Daniel D.
Chilcot Jr. Richard E.
Detroit Testing Laboratory, Inc.
Patel Harshad
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