Tool driving or impacting – Processes
Patent
1992-10-13
1994-07-19
Smith, Scott
Tool driving or impacting
Processes
173 81, 173 86, 173 89, E02D 708
Patent
active
053300114
ABSTRACT:
A free fall stroker for raising and dropping a drop hammer for soils bearing testing or the like includes a housing through which a drop hammer cable extends from one side to the bottom thereof. A pair of guide pulleys guide the cable through the housing and a movable sheave operates within a parallelogram-shaped track with four legs, and is attached to a telescoping arm of a hydraulic stroking cylinder. When the arm is retracted, the sheave is moved in a first leg of the track and engages the cable, pulling it between the guide pulleys. When the sheave reaches the end of the first leg, it moves in a second leg in a second direction away from the guide pulleys. This causes the cable to be released, thus dropping the drop hammer and letting it free fall. Extension of the telescoping arm then returns the sheave to the point of origin via the third and fourth legs of the track. A winch is provided on top of the housing to adjust the cable length and a stroke counter counts the number of hammer strokes.
REFERENCES:
patent: 2500879 (1950-03-01), Smallpeice
patent: 2919109 (1959-12-01), Minty
patent: 3216511 (1965-11-01), Ladd et al.
patent: 3278162 (1966-10-01), Akins et al.
patent: 3669411 (1972-06-01), McKendrick
patent: 3856266 (1974-12-01), McKendrick
patent: 4142709 (1979-03-01), Giessler
patent: 4166508 (1979-09-01), van den Berg
patent: 4455013 (1984-06-01), Fischer et al.
patent: 4580640 (1986-04-01), Boldt
patent: 4638978 (1987-01-01), Jordan
patent: 4844661 (1989-07-01), Martin et al.
patent: 4852661 (1989-08-01), Ellington
patent: 4977965 (1990-12-01), Rupe
Smith Scott
The George E. Failing Company
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