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US 5,117,923 AGranted
Hydraulic jackhammer
AssigneeSulzer Brothers Limited
InventorWolfgang Wuhrer
Life of this patent
Estimating the term…
Abstract
The hydraulic jackhammer is provided with a rotor turbine which is driven by a liquid stream in order to activate the tup for driving against a jumper rod. After passing by the turbine rotor, the liquid stream is mixed with air and passed through a nozzle into a guide channel under pressure in order to cool the casing. Some of the liquid-air mixture is passed through the hollow jumper rod for spraying onto a jumper bit and sprayed onto the rock being drilled.
Claims23
A hydraulic jackhammer comprising
- a casing;
- a jumper rod slidably mounted in said casing;
- a resiliently mounted tup in said casing for impacting against one end of said jumper rod;
- a transmission in said casing operatively coupled to said tup for driving said tup in a striking direction towards said jumper rod;
- a turbine rotor in said casing operatively connected to said transmission for actuating said transmission in response to rotation of said rotor;
- means in said casing for directing at least one liquid stream against said rotor for rotating said rotor;
- an air opening in said casing adjacent said rotor for admitting air into said casing;
- and
- a collecting nozzle downstream of said rotor for collecting and mixing the liquid from said stream after passage by said rotor and air from said air opening.
6 more elements
A hydraulic jackhammer comprising
- a casing;
- a jumper rod slidably mounted at one end of said casing;
- a tup mounted in said casing for impacting against one end of said jumper rod;
- a transmission in said casing operatively coupled to said tup for driving said tup in a striking direction towards said jumper rod;
- a turbine rotor in said casing operatively connected to said transmission for actuating said transmission in response to rotation of said rotor;
- and
- means in said casing for directing at least one liquid stream against said rotor for rotating said rotor.
4 more elements
A method of operating a jackhammer comprising the steps of
- passing a liquid stream against a turbine rotor within a casing of the jackhammer to at least partially energize said rotor to effect a rotation and striking movement of a hollow jumper rod;
- drawing ambient air into said casing;
- collecting the liquid passing from the rotor and air drawn into the casing to form a liquid-air mixture;
- increasing the pressure on the liquid-air mixture several times atmospheric pressure;
- discharging surplus liquid-air mixture to the environment;
- forming a resilient air cushion in a chamber between the jumper rod and the tup prior to movement of the tup against the jumper rod while permitting the chamber to receive liquid displaced upon impacting of the tup on the jumper rod;
- and
- supplying the liquid-air mixture to the hollow jumper rod as a cooling and washing agent.
5 more elements
A hydraulic jackhammer comprising
- a casing having at least a pair of bores;
- a jumper rod slidably mounted in said casing;
- a tup slidably mounted in said casing for impacting against one end of said jumper rod and for separating two chambers within said casing from each other, said tup being sized to permit said bores to alternately communicate with said chambers;
- a transmission including a guide head slidably mounted in said casing for driving said tup in a striking direction towards said jumper rod;
- a turbine rotor in said casing operatively connected to said transmission for actuating said transmission in response to rotation of said rotor;
- and
- means in said casing for directing at last one liquid stream against said rotor for rotating said rotor.
4 more elements
Dependencies are inferred from the claim text.