Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1987-12-17
1990-05-01
Moskowitz, Nelson
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
181114, 181401, 367 75, G01V 110, G01V 1147, G01V 1047
Patent
active
049210670
ABSTRACT:
A wheeled, self-propelled tractor has a percussion tool or hammer mounted on its forward end and an impact transmitting means carried on the tractor below the hammer. In accordance with one aspect of the invention, the impact transmitting means comprises a metal frame having a strong rigid top plate that is struck by the hammer and a downwardly opening cavity in which wood timbers are mounted to transmit the impact from the plate to a cemetery marker. Repeated blows to the market applied through the impact transmitting means will drive the marker into the ground until it is flush with the ground surface where it will not interfere with mowing. The frame is fastened on the vehicle by a suspension system that includes tension springs which keep the wood timbers in a horizontal plane but permit the frame to move downwardly each time it is struck by the hammer.
In accordance with a second aspect of the invention, method and apparatus for generating seismic wave for subsurface geophysical exploration are described in which a weighted impact hammer is guided along an elongated track against a shock-transmitting plate. In a first mode of operation for generating seismic P-waves, the track is oriented in the vertical direction and the hammer is permitted to fall by force of gravity against the impact plate which is disposed on the earth surface therebelow. In a second mode of operation for generating seismic shear waves, the track is oriented at a selected shear angle with respect to the earth surface and guides the falling hammer against the shock-transmitting plate which is least partially penetrates the earth surface.
REFERENCES:
patent: 2740488 (1956-04-01), Heaps
patent: 2928322 (1960-03-01), Spitzer
patent: 3172483 (1965-03-01), Spitzer
patent: 3379273 (1968-04-01), Chelminski
patent: 3393763 (1968-07-01), Sundt
patent: 4050540 (1977-09-01), Cholet et al.
patent: 4059820 (1977-11-01), Turpening
patent: 4222454 (1980-09-01), Airhart
patent: 4354572 (1982-10-01), Martin
patent: 4609066 (1986-09-01), Layotte et al.
patent: 4662473 (1987-05-01), Betz
Omnes, G.; "Exploring with SH-Waves", CSEG National Convention, 5/11/78, Calgary, Canada, pp. 40-49.
CGG; "Land Seismic Shear Waves", No. 507.78.05, by R. Garotta, pp. 1-16.
Fulkerson David W.
Smith Lawrence W.
Moskowitz Nelson
Shear Wave Technology
LandOfFree
Self-propelled percussion unit and method of using same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-propelled percussion unit and method of using same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-propelled percussion unit and method of using same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-824402