Patent ID: 7779731

Claim:
An improved power assisted lever arm ratchet wrench comprising: a handle containing an air drive motor, an air line connection furnished to the handle; a threaded drive extension sleeve mounting collar mounted on the handle; a drive shaft protruding from the handle and surrounded by the threaded drive extension sleeve mounting collar; an extension sleeve having a first end formed as threaded interface and having a second end formed as an interface thread, wherein the first end of the extension sleeve is attached to the threaded drive extension sleeve mounting collar of the handle; an extension shaft having a first end and a second end, wherein the extension shaft is disposed substantially parallel to the extension sleeve; a drive socket attached to the first end of the extension shaft and connected to the drive shaft protruding from the handle; a drive tang formed at the second end of the extension shaft; wherein support of the extension shaft consists of the first end of the extension shaft attached to the drive socket and of the second end of the extension shaft attached to the drive tang; wherein a length between an engagement point of the drive socket of the extension shaft and an engagement point of the drive tang of the extension shaft is essentially equal to a length between an engagement point of the threaded interface of the extension sleeve and an engagement point of the interface thread of the extension sleeve; a ratchet head having a drive shaft and having a threaded collar attached to the interface thread of the second end of the extension sleeve and wherein the drive tang of the second end of the extension shaft is attached to the drive shaft of the ratchet head; wherein the extension shaft is unsupported apart from support furnished to the drive socket of the first end of the extension shaft and to the drive tang of the second end of the extension shaft; and wherein the handle is directly and operably attachable/detachable to the ratchet head by connecting/disconnecting the drive shaft of the handle to/from the drive shaft of the ratchet head via the extension shaft, connecting/disconnecting the threaded drive extension sleeve mounting collar mounted on the handle to/from the threaded interface and by connecting/disconnecting the interface thread to/from the threaded collar of the ratchet head.