patent is one of Yost’s twenty U.S. patents.
by air makes it possible to transfer heavy loads over
areas of rugged terrain
bodies of water, or to areas where roads
have not been built. Heavy loads have been
transported by helicopters
but a limit of practicality is reached with extremely
wherein even large helicopters cannot carry the loads or wherein
use of a large helicopter is inconvenient or costly. Balloons are
capable of inexpensively
lifting loads much heavier than those
conveniently carried by helicopters,
and in accordance with the
present invention heavy pay loads are lifted by balloons
and are towed
by helicopters which are attached by a tow line to the pay load
provide only a small percentage of the required lift. A preferred form
employed for these heavy lifting jobs is supplied with lifting
gas from a burner
can be regulated to change the net lift or
free lift of the balloon.
and transporting the heavy loads, the load on the
helicopter must be maintained
uniform to avoid loss of
control of the helicopter. This is accomplished
adjusting the net lift of the balloon so that it applies a constant
the pay load, which is a predetermined lift less than the total
the pay load.”
NOTE: All ten claims involve a Lighter-Than-Air balloon which
buoyantly supports most of a
heavy payload; neither assigned classification
applies to balloons. The USPTO should have included 244/33 (Balloon, captive).
N.B. None of the claims involve multiple
(or lifting) machines mentioned in the text or any of the
claims. The patent does not discuss method or means of releasing the
payload after it has been transported to the desired location.
3,351,325 Aerial pick-up and delivery system,
3,946,971 Load lifting system,
4,498,408 Lifting body for diving, and
WO 2002042149 Spherical
LTA cargo transport system.