Back to results
US 4,997,314 AGranted
Pressure grouted pier and pier inserting tool
OwnerPhilip L. Hartmaninventor
Life of this patent
Estimating the term…
Abstract
An improved pipe pier inserting tool comprising at least two separate driving means, attached to two separate gripping means, whereby a pipe pier held within the gripping means can be forced, either in tandem or sequentially, by the two driving means into unstable soil beneath a building foundation so as to add new support.
Claims14
A pipe pier inserting tool comprising:
- a supporting frame defining a pipe driving axis;
- means for coupling said frame to a load;
- first means coupled to said frame for driving a pipe along said pipe driving axis;
- first coupling means for coupling said pipe to said first means for driving, said first coupling means being extendably engaged with said first means for driving, for extension and retraction thereby, said first coupling means being adapted to grip said pipe when said means for driving is forced to an extended position, and to release said pipe when said means for driving is retracted;
- second means coupled to said frame for driving said pipe along said pipe driving axis;
- and
- second means for coupling said pipe to said second driving means, said second coupling means being extendably engaged with said second driving means, for extension and retraction thereby, said second coupling means being adapted to grip said pipe when said means for driving is forced to an extended position, and to release said pipe when said second driving means is retracted.
4 more elements
A pipe pier inserting tool comprising:
- a supporting frame adapted to be coupled to a load and defining pipe driving axis;
- first means for releasably coupling a pipe to be driven to said frame disposed along said pipe driving axis;
- first means for driving said pipe along said axis, said first means for driving being coupled to said frame and in extendable and retractable engagement with said first means for coupling;
- second means for releasably coupling said pipe to said frame disposed along said pipe driving axis;
- and
- second means for driving said pipe along said axis, said second means for driving being coupled with said frame and in extendable and retractable engagement with said second means for coupling.
3 more elements
The process of underpinning and raising portions of a building foundation resting on underlying soil comprising the steps of:
- boring a hole in said foundation, the length of said hole defining a pipe driving axis;
- mounting a pipe driver adjacent said hole, said pipe driver including first and second means for gripping a pipe and first and second means for driving a pipe, said first gripping means being extendably connected to said first driving means, and said second gripping means being extendably connected to said second driving means, and each of said gripping means being disposed along said pipe driving axis;
- inserting a pipe axially into said pipe driver along said pipe driving axis;
- gripping said pipe with said first gripping means;
- driving the length of said pipe through said hole in said foundation by forcing said first driving means to an extended position;
- gripping said pipe with said second gripping means;
- and
- driving the length of said pipe through said hole in said foundation by forcing said second driving means to an extended position.
5 more elements
A method of forming a pressure grouted pier comprising:
- a. inserting a length of perforated pipe into the soil;
- b. providing a volume surrounding at least a portion of the exteriors of the length of said pipe that is free of soil;
- c. forcing grout through said perforations in said pipe and into said volume;
- and
- d. inserting a sleeve to surround said pipe along a non-grouted portion of the length of said pipe.
2 more elements
Dependencies are inferred from the claim text.