Portable winch
AssigneeTT Technologies, Inc.
InventorMichael Tjader
Life of this patent
Estimating the term…
Abstract
A portable winch and method of use is shown. One advantage of winches shown includes an ability to lower a boom or boom sections into limited access exit pit for winching operations such as pipe bursting. Sectional boom designs shown provide the ability to easily raise and lower a boom large distances without the need for a single long boom. Selected winch designs shown include flexible inserts between the boom and the winch frame that help resist damage from unforeseen shifting of the device during operation. Designs and methods shown also include multiple pulleys on a boom end unit. Fasteners are shown that reduce build up of debris.
Claims18
A boom pulley assembly, comprising:
- at least two pulleys mounted to a boom end unit, including:
- a first pulley with a tangent substantially in line with a boom;
- and
- a second pulley more distal on the boom than the first pulley, the second pulley spaced laterally apart from the first pulley in a direction opposite from a distal end of a cable to be pulled.
A portable winch, comprising:
- a winch;
- a boom assembly, including:
- two or more boom sections;
- a boom driver that mechanically engages a lateral side of the two or more boom sections fixed in relation to one another to raise and lower the boom sections;
- a flexible line coupled to the winch;
- a boom end unit, including:
- a first pulley with a tangent substantially in line with a boom;
- and
- a second pulley spaced laterally apart from the first pulley in a direction opposite from a distal end of a cable to be pulled.
A boom pulley assembly, comprising:
- a pulley adapted to mount to an end of a boom assembly;
- one or more supports moveably coupled to the pulley at a joint;
- a plurality of holes to select a position of the joint;
- and
- a spring pin assembly to engage one of the holes, having selectable pin positions, including:
- an engaged position of the pin, wherein the engaged position is normally biased by a spring into one of the holes;
- an disengaged position of the pin, where the pin is held out of the holes, against the bias of the spring in a hands free configuration.
Dependencies are inferred from the claim text.