초록 ▼

A hydraulic force-delivering hand tool, such as a cable crimper, comprising a body with a large axial bore at one end forming a cylinder. A piston is slidable in the cylinder and has a nodular mass at the outer end to drive against a member to be crimped. A plunger pumps a quantity of fluid past a t

A hydraulic force-delivering hand tool, such as a cable crimper, comprising a body with a large axial bore at one end forming a cylinder. A piston is slidable in the cylinder and has a nodular mass at the outer end to drive against a member to be crimped. A plunger pumps a quantity of fluid past a transfer one-way check valve and into the cylinder, to drive the piston forward a small increment each stroke. When the piston passes through its full predetermined stroke to effect a complete crimp, interengaging means on the transfer check valve and on the piston, lift the transfer check valve from its seat to prevent further travel and to relieve fluid back to the transfer chamber. A button may then be pressed to unseat a relief check valve, to relieve the cylinder to the reservoir.

대표청구항 ▼

A hydraulic force delivering tool comprising: a cylinder having an open end; a piston slidable in said cylinder; a force-applying member on one of said piston and cylinder; a flow port opening into said cylinder; a transfer check valve engaging said port to enable flow into said cylinder only; a flu

A hydraulic force delivering tool comprising: a cylinder having an open end; a piston slidable in said cylinder; a force-applying member on one of said piston and cylinder; a flow port opening into said cylinder; a transfer check valve engaging said port to enable flow into said cylinder only; a fluid transfer chamber in communication with said flow port; pump means for forcing fluid from said transfer chamber past said check valve; and mutually engagable means on said piston and said transfer check valve for lifting said transfer check valve from said port when said piston has traveled through a predetermined stroke.