Inventor

CRANE ROBERT F

US65 patents

⚠️ This page may combine multiple inventors who share the name “CRANE ROBERT F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CRANE ROBERT F

EARTH TOOL CO LLC

Roller pipe burster

Drill bit for directional drilling

Rod gripping jaw

Sonde housing for directional drilling

Joint for use in a directional boring apparatus

Drill bit for directional drilling

Sonde housing structure

Method and bit for directional horizontal boring

Drill head for directional boring

Bit for directional drilling

Apparatus for directional drilling

Method and apparatus for on-grade boring

Method and apparatus for replacement of underground pipe

Drill bit for directional drilling in cobble formations

Pipe replacement method and rotary impact mechanism for pipe bursting

Drill bit for impact-assisted directional boring

Method and apparatus for pipe reforming and clearing

Method and apparatus for replacement of underground pipe

Impact device for directional boring

Pneumatic ground piercing tool with movable chisel head

Directional drill hammer pullback device

Directional drill hammer pullback device

Rod pulling and pushing machine for pipe bursting

Method and apparatus for slitting flexible pipe in an underground bore

Portable pulling apparatus

Method and apparatus for replacement of pipelines

Lead pipe spudding prior to extraction or remediation

Extraction of ductile pipe

Slip style rod spinner for pipe bursting machine

Pipe slitter

Pipe slitting apparatus

Method and apparatus for directional boring under mixed conditions

Method and apparatus for directional boring under mixed conditions

Method and apparatus for directional boring under mixed conditions

Rod pulling and pushing machine for pipe bursting

EARTH TOOL CORP

Pneumatic ground piercing tool

Pneumatic ground piercing tool with detachable head

Dual-diameter pneumatic ground piercing tool

Method for making a pneumatic ground piercing tool

Pneumatic ground-piercing tool and body therefor

WENTWORTH STEVEN W

Joint for use in back reaming

Rod pulling and pushing machine for pipe bursting

Rod pushing and pulling machine

CHARLES MACHINE WORKS

Lead pipe spudding prior to extraction or remediation

System for applying torsional force to a buried pipe to facilitate extraction

Extraction of ductile pipe

EARTHJTOOL COMPANY L L C

Drill string joint

RANDA MARK D

Beacon assembly

CRANE ROBERT F

Reamer assembly

HARR TECHNOLOGIES LLC

Method and apparatus for installing an underground pipe