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urethane resin having the shape of a square tube having an
                                                              outer side measurement of about 4 inch. The urethane resin
                                                              may be pigmented any desirable color. In implementations
                                                              the main member  52 may have a wall thickness  of about
                                                              0.25 inch. In various implementations the extension 53 of
                                                              the boom 8 may be formed of a fiberglass reinforced polyes-
                                                              ter resin having the shape of a square tube having an outer
                                                              diameter of about 3.5 inch. In implementations the exten-
                                                              sion 53 may be sized to have a tight, though still manually
                                                              slidable, fit within the main member 52. In implementations
                                                              the extension 53 may be pigmented any desirable color.
                                                               The base 170 has several cable holes 180 configured for
                                                              storage of the cable 182. In the implementations shown the
                                                              cable holes 180 have a key-hole shape. In implementations
                                                              such cable holes 180 could also be included on the drum of
                                                              the winch 74. The cable holes 180 are for use with cables
                                                              182 that have a ball end swaged onto the end of the cable
                                                              182 or other ball or other element with a diameter larger
                                                              than the cable 182 otherwise coupled to the cable 182. To
                                                              attach the cable 182 to the drum of the winch 74 instead of
                                                              bolting the bare end of the cable 182 to the drum one may, in
         Figure 24: Top perspective view of a winch housing and a substantially   implementations, drop the ball end of the cable 182 through
         rectangular top section of a boom end housing of the portable crane.  a cable hole 180 in the drum and crank a few wraps of cable
                                                              182 onto the drum. In implementations this allows the cable
         top 12 of the mast 6 and allows the boom 8 to pivot relative   182 to be installed quickly. In implementations  the unin-
         to the mast 6, as indicated by the difference in angle of the   stallation is also quick as the cable 182 may be brought to
         boom 8 relative to the mast 6 between figure 20 and figure   a slack state and the ball end slid out of the cable hole 180
         21. An angle adjuster 20 is coupled to the boom end housing   in the drum.
         10 and to a sleeve 48 and is configured to releasably secure   Once the cable 182 is removed from the drum of the winch
         the boom 8 at a desired angle relative the mast 6. The mast 6   74 it may be drawn through the sheave 44 and the ball end
         in implementations is removably coupled within a base 170   may be inserted into a cable hole 180 in the base 170 for
         which has several bolt holes 178 to be coupled to a floor or   storage. This may  be useful in implementations  such  as,
         other stationary or moving item.                     by non-limiting example, submersible pump removal us-
           In implementations the mast 6 may be made of fiberglass   age, where the cable 182 may often remain attached to the
         reinforced  polyester resin.  In implementations the resin   pump, so in practice a user may just hook the cable 182 to
         may be pigmented any desirable color. In implementations   the winch 74 to draw the pump up to service the pump and
         the mast 6 may have the shape of a right circular hollow cyl-  then, when the service is complete, the pump may be low-
         inder with an outer diameter of about 3.57 inch and an about   ered back down, the cable 182 removed from the winch 74
         0.5 inch wall thickness. In implementations the main mem-  and coupled again to the cable hole 180 of the base 170. In
         ber 52 of the boom 8 may be formed of a fiberglass reinforced   such implementations there may be a stationary base 170
                                                              at each location where there is one or more pumps that will
                                                              regularly need to be serviced (and each base 170 may, for
                                                              example, be bolted to some stationary surface), and the mast
                                                              6 of the portable crane 2 may be removed from one base 170
                                                              and carried by hand to the next base 170 to perform service
                                                              on the next pump or set of pumps, with the cable(s) 182 of
                                                              the next pump(s) already coupled to the cable holes 180 of
                                                              the next base 170.
                                                               In implementations the cable 182 is a 1/4 inch wire rope.
                                                              In implementations the winch 74 may be configured to accept
                                                              either swaged ball ends or bare end cable. In implementations
                                                              the length of the boom 8 may be altered using the extension
                                                              53 from about 32 inches to about 60 inches. In implementa-
                                                              tions the mast 6 may have an outer diameter of about 3.5
                                                              inches. In implementations the portable crane  2 may have
                                                              a height from the bottom of the base 170 to the top of the
                                                              boom end housing 10 of about 55 inches. In implementations
                                                              the portable crane 2 may have a height from the bottom of
                                                              the base 170 to the end of the boom 8, when the boom 8 is
                                                              fully extended and adjusted to its highest angle relative to
                                                              the mast 6 using the angle adjuster 20, of about 101 inches.
                                                              In implementations the portable crane 2 may include an ex-
                                                              ternal handle that helps a user to rotate the portable crane 2
                                                              under a load. In implementations a single person may be able
         Figure 25: Top perspective view of another implementation of a
         winch housing and a substantially rectangular top section of a boom   to fully assemble the portable crane 2 without the use of any
         end housing.                                         tools because of the features described herein. WRN
                                                                Wire Rope News & Sling Technology   June 2017  63
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