Tamping machine

Details Tamping machine Tamping machine

1976-07-27

1977-04-05

Byers, Nile C.

Road structure, process, or apparatus

Apparatus

Tamper

173118, E01C 1934

Patent

active

040159094

ABSTRACT:
In the manually guided tamping machine comprising a vertically long casing, a motor mounted thereon, crank means driven thereby, a cylinder snugly mounted to be vertically movable in said casing, a percussion piston in said cylinder, and a pair of coil springs disposed above and below said piston in said cylinder so as to generate vibrating reciprocation to be transmitted to the tamper foot, the invention is characterized by disposing said crank means not at the casing top as usual wherein a relatively long and thin connecting rod or ramrod must pass through the coil spring but vertically amid and in the cylinder, and providing a pair of pistons instead of one in the prior art so as to be subjected to alternate upward and downward movement by means of a pair of connecting rods pivotally linked to said crank means. A shaft for driving said crank means is transversely extended through a vertical slot formed in the cylinder wall and bearings mounted on the casing. Thus it is possible to make construction and assembling work simpler and cost cheaper.

REFERENCES:
patent: 509373 (1893-11-01), Hoffmann
patent: 711998 (1902-10-01), McConney
patent: 837118 (1906-11-01), Rekar
patent: 2185471 (1940-01-01), Mall
patent: 3090286 (1963-05-01), Kestel
patent: 3270635 (1966-09-01), Kestel
patent: 3286790 (1966-11-01), Kestel
patent: 3308728 (1967-03-01), Brown
patent: 3492924 (1970-02-01), Fors
patent: 3847498 (1974-11-01), Grane

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