Patent ID: 6044733
Filing Date: 2000-04-04
Classification: B25B

Abstract:
A screwdriver comprising:a handle (10) having a longitudinal space (120) defined therein and a polygonal opening (12) defined through one of two ends of said handle (10) and communicating with said longitudinal space (120);a first spring (50) received in said longitudinal space (120);a tube (20) having an operational section (22) and a polygonal section (201) which is securely engaged with said polygonal opening (12), a first shoulder portion (24) and a second shoulder portion (28) respectively extending radially outward from said operational section (22), a passage (26) defined radially through said operational section (22), a groove (25) defined in the outside of said operational section (22) and a ball (27) movably received in said passage (26);a shank (30) having a first section (34) and a second section (38) with a flexible section (36) connected therebetween, said first section (34) securely extending through said tube (20) and connected to said first spring (50), said first section (34) having a first annular groove (33) defined in the outside thereof and said second section (38) having a second annular groove (35) defined in the outside thereof, said second section (38) having an engaging hole (32) defined in the distal end thereof so as to be adapted to receive a bit therein, and a second spring (60) mounted to said operational section (22) and contacting said first shoulder portion (24), anda sleeve (40) slidably mounted to said operational section (22) of said tube (20) and having a first flange (44) and a second flange (48) respectively extending radially inward from the inside thereof so that a recess (46) is defined between said first flange (44) and said second flange (48), said second spring (60) received between said first flange (44) and said first shoulder portion (24), a clamp (23) received in said groove (25) of said operational section (22) to prevent said second flange (48) from sliding over said operational section (22), said ball (27) received in said recess (46) when said sleeve (40) is pulled toward said handle (10).