Abstract: The specification describes an air suspension freight vehicle comprising a divided pontoon structure in the form of two parallel spaced apart rigidly connected air cushion pontoons adapted to carry freight loads therebetween greater in air cushion transport over ground and water surfaces while utilizing a helicopter attachable to the frame for propulsion and which without cargo may be transported by helicopter to and from a point of utilization.

Abstract: The specification describes a device termed a silent obturator which is in the form of a flexible strip having at least one mounting hole at one end portion at least and supported in bowed or arcuate configuration between two supports, one of which is movable toward the other and which carries a "moveable" contact member near but not at the mid-point thereof whereby motion of one support relative to the other causes outward or inward deflection of the obturator relative to a line between the supports in such manner as to displace the contact member toward the fixed support in one coordinate direction and away from the line between said supports in another coordinate direction effectively providing a resultant path of motion at an angle to the line between said supports which, when said moveable contact member is placed in spaced association with a "fixed" contact member relatively fixed in space provides a contact action therewith which is substantially tangential relative to the bow or curve of the obturator

Abstract: The following disclosure sets forth a non-marking lawn mower in which a cutter cylinder carrying multiple disc blower cutters in a centrifugal blower structure is supported in parallel spaced relation to a rearward roller structure which carries the mower. The drive motor rotates the cylinder at a cutter speed greater than 6,000 feet per minute. At least one forward adjusting roller can be positioned to determine the height of cut effected by the cutter cylinder.

Abstract: The specification describes a playing surface structure for spinning top pin games in which the playing surface is adjustable to a diagonal predetermined slope by the incorporation of a level indicating device fixed at a predetermined diagonal slope relative to the playing surface to enable the development of skill.