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US 4,064,964 AGranted
Seismic signal generating apparatus
OwnerJohn A. E. Nordeninventor
Life of this patent
Estimating the term…
Abstract
A seismic signal generating apparatus comprising a vehicle including a rearwardly extending bed, a ram-supporting framework pivotally mounted on the bed for pivotation about a horizontal axis, a ram slidably and reciprocably mounted in the framework, and a plurality of catapult springs connected between the framework, and one end of the ram for forceably reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree. A pair of superimposed metal plates are positioned below the ram on the ground for receiving the impact of the ram.
Claims19
A seismic signal generating apparatus comprising:
- a vehicle including a rearwardly extending bed;
- a ram-supporting framework pivotally mounted on the bed for pivotation about a horizontal axis;
- a ram reciprocably mounted in the framework for vertical reciprocation in one position of the framework;
- a plurality of catapult tension springs connected between the framework and the upper end of the ram for forcibly reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree;
- and
- a pair of superimposed metallic striker plates positioned directly below the ram upon the ground.
3 more elements
A seismic signal generating apparatus comprising:
- supporting means;
- an elongated catapult ram having an upper end and a lower end and mounted on said supporting means for pivotation about a horizontal axis from a vertically extending position to an inclined position;
- hydraulic piston and cylinder means including vertically extensible pistons cooperating with the upper end of the ram for elevating the ram;
- a pair of superimposed steel plates positioned below said ram when the ram is in its elevated position and adapted to be impacted by said ram when said ram is reciprocated downwardly;
- and
- a plurality of tension springs connected between the upper end of said ram and said supporting means for resiliently opposing the elevation of said ram by said pistons as said springs are tensioned and resiliently opposing rebound of said ram after said ram has impacted upon said superimposed steel plates.
3 more elements
A seismic signal generating apparatus comprising:
- a vehicle including a rearwardly extending bed;
- a ram-supporting framework pivotally mounted on the bed for pivotation about a horizontal axis;
- a ram reciprocably mounted in the framework for vertical reciprocation in one position of the framework, said ram-supporting framework comprising:
- a horizontally extending base plate having an opening therethrough through which said ram reciprocably extends;
- a pair of spaced, vertically extending side plates connected at their lower ends to said base plate and positioned on opposite sides of said ram;
- track channels secured to said side plates and positioned on opposite sides of said ram for guiding said ram during its reciprocating movement;
- and
- a plurality of catapult tension springs connected between the framework and the upper end of the ram for forcibly reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree.
5 more elements
A seismic signal generating apparatus comprising:
- a vehicle including a rearwardly extending bed;
- a ram-supporting framework pivotally mounted on the bed for pivotation about a horizontal axis;
- a ram reciprocably mounted in the framework for vertical reciprocation in one position of the framework;
- a plurality of catapult tension springs connected between the framework and the upper end of the ram for forcibly reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree;
- a ram latching subassembly for releasably latching the ram in an elevated status, said ram latching subassembly comprising:
- a hydraulic cylinder;
- a latching block;
- a supporting plate supporting said hydraulic cylinder and extending under said latching block;
- wheels rollably supporting said latching block on said supporting plate;
- and
- a piston rod extensible from said hydraulic cylinder and connected to said latching block for rolling said latching block on said supporting plate and into latching engagement with said ram upon actuation of said cylinder.
8 more elements
A seismic signal generating apparatus comprising:
- a vehicle including a rearwardly extending bed;
- a ram-supporting framework pivotally mounted on the bed for pivotation about a horizontal axis;
- a ram reciprocably mounted in the framework for vertical reciprocation in one position of the framework;
- a plurality of catapult tension springs connected between the framework and the upper end of the ram for forcibly reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree;
- outrigger means disposed beneath said bed at the rear end thereof and operative to selectively elevate the rear end of said vehicle, said outrigger means comprising a pair of hydraulic outrigger subassemblies positioned on opposite sides of said vehicle beneath the rear end portion of the bed and each including:
- an outwardly and downwardly projecting leg having its inner and upper end pivotally connected to the under side of the bed for pivotation about a horizontal axis;
- a support shoe secured to the outer, lower end of the leg;
- and
- a hydraulic piston and cylinder assembly connected to the leg for pivoting the leg upwardly and downwardly.
6 more elements
A seismic signal generating apparatus comprising:
- a generally horizontally extending supporting structure;
- a ram-supporting framework pivotally mounted on the supporting structure for pivotation about a horizontal axis;
- a ram reciprocably mounted on the framework for vertical reciprocation in one position of the framework;
- a plurality of catapult tension springs connected between the framework and the upper end of the ram for forcibly reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree;
- and
- a pair of superimposed metallic striker plates positioned directly below the ram upon the ground.
3 more elements
A seismic signal generating apparatus comprising:
- a vehicle including a rearwardly extending bed;
- a ram-supporting framework mounted on the bed and including:
- a horizontally extending base plate having an opening therethrough through which said ram reciprocably extends;
- a pair of spaced, vertically extending side plates connected at their lower ends to said base plate and positioned on opposite sides of said ram;
- track channels secured to said side plates and positioned on opposite sides of said ram for guiding said ram during its reciprocating movement;
- a ram reciprocably mounted in the framework for vertical reciprocation in one position of the framework;
- and
- a plurality of catapult tension springs connected between the horizontally extending base plate and the upper end of the ram for forcibly reciprocating the ram from an elevated status in which the catapult springs are tensioned, to a lowered, impacting position in which the springs are tensioned to a lesser degree.
5 more elements
A seismic signal generating apparatus comprising:
- supporting means;
- an elongated catapult ram having an upper end and a lower end and reciprocably mounted on said supporting means;
- hydraulic piston and cylinder means including vertically extensible pistons cooperating with the upper end of the ram for elevating the ram in relation to the supporting means;
- metal plate means positioned below said ram when the ram is in its elevated position and adapted to be impacted by said ram when said ram is reciprocated downwardly;
- a plurality of tension springs connected between the upper end of said ram and said supporting means for resiliently opposing the elevation of said ram by said pistons as said springs are tensioned, and resiliently opposing rebound of said ram after said ram has impacted upon said steel plate means by the retention of residual tension in said tension springs at the time of impact;
- a ram latching subassembly for releasably latching the ram in an elevated status preparatory to catapulting the ram against the steel plate means by the use of said tension springs, and after said extensible pistons are inactivated in their elevating cooperation with the upper end of the ram, said ram latching subassembly including:
- a latching block adapted to latchingly engage said ram upon movement of said latching block;
- and
- a hydraulic cylinder for actuating said latching block to engage and disengage said latching block from said ram.
6 more elements
Dependencies are inferred from the claim text.