locking springs 60 and 61 fig2 and 3 a lever 78 is connected and bent outward from the lever fitting 74 the mechanical lock 10 also includes a rod 30 fig1 3 the rod 30 has a first end 32 extending into the housing 14 and a second end 34 extending out of the housing 14 the second end 34 of the rod 30 is flattened into a flange 36 fig1 the flange 36 has a hole 38 for fastening the rod to part of a vehicle seat not shown the rod 30 may be hollow as shown fig2 and 3 or solid as shown in fig6 and 7 the rod 30 has a general od of approximately 12 7 mm however the outer surface of the rod 30 has non cylindrical regions or rotation obstructions extending longitudinally for substantially the length of the rod 30 the rotation obstructions serve as means to limit the rod 39 s 30 rotational movement in the exemplary embodiment the rod 30 includes two flat portions 31 that are generally 180 u00b0 from each other fig2 6 and 7 these flat portions 31 extend longitudinally on the outer surface of the rod 30 for substantially the length of the rod 30 fig2 and 3 the rotation obstructions may alternatively be grooves score lines bulges or other surface hindrances designed to obstruct the rod 39 s rotational movement within the housing housing 14 receives a pair of end bushings 40 in the exemplary embodiment the bushings have an od of 21 08 mm an id of 16 14 mm and a length of 22 86 mm each bushing has a circumferential groove 44 the dimples 16 in the housing 14 engage the circumferential grooves 44 of the.