The petitioner was employed as a driver under the first respondent vehicle Ashok Leyland Trailor Lorry bearing Registration No.TN-25-9599. The first respondent is the owner of the vehicle and the said vehicle was insured with the second respondent. While so, on 17.09.2004, at about 11.30 hours, when he was working as the driver, the lorry was parked in Trichy M/s.Tools Fab Company. On 17.09.2004, after loading the materials and coming out side, as the driver of the first respondent Trailer Lorry, the petitioner who was about to take his lorry, while cleaning the front windscreen of the Trailer Lorry by holding the hand grips by standing in the bumper of the trailer lorry, in order to prevent from falling down, due to loss of balance caught hold of a chain which was hang nearby. At the time, 'A' frame wheel had fallen down on the head and thereby sustained injuries. He was admitted in the hospital on 17.09.2004 and discharged on 05.11.2004. Due to this accident he sustained permanent disability. He was aged about 23 years and he was earning a sum of Rs.5,000/- per month. Since the accident took place in the course of employment, the first respondent being the