Road structure – process – or apparatus – Apparatus – Tamper
Patent
1976-05-24
1977-08-23
Byers, Nile C.
Road structure, process, or apparatus
Apparatus
Tamper
E01C 1934
Patent
active
040436942
ABSTRACT:
A self-inflating, cushioned, shock-absorbing compacting apparatus especially adapted for mounting onto the boom of a backhoe tractor is provided which ensures that a large proportion of the vibratory reaction forces and shocks attendant to earth-tamping or compacting operations are safely absorbed without damage to the backhoe itself or causing the operator to experience severe shocks. The apparatus includes an air-filled, multiple-ply resilient bag situated between a hydraulically actuated, reciprocable, earth-engaging compacting foot and the boom-mounting structure of the apparatus, in conjunction with a check valve permitting self-inflation of the bag when the apparatus is elevated to extend the bag. The bag provides support for the compacting foot in order to safely absorb vibratory shocks and the like over essentially all vibration frequencies and amplitudes exprienced in practice. In preferred forms, the cushioning bag completely replaces conventional springs and the like heretofore employed for shock absorption in compaction devices and provides the sole support for the compacting foot and related apparatus.
REFERENCES:
patent: 3024861 (1962-03-01), Clynch
patent: 3108519 (1963-10-01), Domenighetti
patent: 3128682 (1964-04-01), Thompson
patent: 3283678 (1966-11-01), Domenighetti
patent: 3749506 (1973-07-01), Lance
patent: 3832081 (1974-08-01), Opderbeck
Byers Nile C.
Scientific Engineering, Inc.
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