A double-chambers inflatable kayak, including an upper chamber and a lower chamber which are fixedly connected to each other by a connecting portion and between which a cavity is formed, wherein the upper chamber includes a cockpit hole and a first air valve provided on the surface, the cockpit hole being in communication with the cavity, and the first air valve being used to inflate and deflate the upper chamber, and wherein the lower chamber includes a second air valve which is used to inflate and deflate the lower chamber.

A double-chambers inflatable kayak, including an upper chamber and a lower chamber which are fixedly connected to each other by a connecting portion and between which a cavity is formed, wherein the upper chamber includes a cockpit hole and a first air valve provided on the surface, the cockpit hole being in communication with the cavity, and the first air valve being used to inflate and deflate the upper chamber, and wherein the lower chamber includes a second air valve which is used to inflate and deflate the lower chamber.

A bending method for an inflatable kayak bottom includes: step 1: cutting the fabric; step 2: sewing and locking; step 3: performing air seal installation in a hole zone; step 4: performing air seal installation around a drop stitch material and placing a nozzle; and step 5: bending into shape, the inflatable kayak bottom becoming airtight overall. In the present application, the drop stitch material of the kayak bottom is sewn and locked to make a deformable kayak bottom structure, which features low costs, easy use and high practicality.

A bending method for an inflatable kayak bottom includes: step 1: cutting the fabric; step 2: sewing and locking; step 3: performing air seal installation in a hole zone; step 4: performing air seal installation around a drop stitch material and placing a nozzle; and step 5: bending into shape, the inflatable kayak bottom becoming airtight overall. In the present application, the drop stitch material of the kayak bottom is sewn and locked to make a deformable kayak bottom structure, which features low costs, easy use and high practicality.

An inflatable watercraft for supporting a user on water includes a flexible water-proof and air-tight bladder having a first end, an opposing second end, a top side, a bottom side, and two opposing lateral sides. The first end is substantially open to expose an interior surface of the bladder and an interior volume of the bladder. A first seal is fixed with the interior surface of the bladder proximate the open first end of the bladder. As such, to inflate the watercraft the user holds the first seal open while scooping air into the bladder until the bladder achieves a substantially inflated configuration. The user then places the first seal in the closed configuration to prevent air from escaping the bladder. Additional seals and means for inhibiting air leaking from the bladder are provided. Multiple forms of watercraft are contemplated.

Embodiments are directed to a hybrid frame boat. The hybrid frame boat may include a cover and a drop-stitch port bladder, a drop-stitch starboard bladder, and a keel beam that may each couple to the cover. The cover may have an aft end portion, a forward end portion, a port side, a starboard side, a longitudinal length extending from the aft end portion to the forward end portion. The drop-stitch port bladder may extend along one or more portions of the port side of the cover. The drop-stitch starboard bladder may extend along one or more portions of the starboard side of the cover. The keel beam may extend along one or more portions of the longitudinal length of the cover between the drop-stitch port bladder and the drop-stitch starboard bladder.

A rigid-inflatable boat (RIB) includes a solid hull and an inflatable tube, forming a part of a gunwale. The boat includes a tube air filling system with an air conduit arranged to communicate with air pumping system and a tube, where the air conduit extends along at least a portion of the tube. The solid hull includes a gunwale portion, forming a part of the gunwale, where the air conduit is enclosed in the gunwale portion.

A rigid-inflatable boat (RIB) includes a solid hull and an inflatable tube, forming a part of a gunwale. The boat includes a tube air filling system with an air conduit arranged to communicate with air pumping system and a tube, where the air conduit extends along at least a portion of the tube. The solid hull includes a gunwale portion, forming a part of the gunwale, where the air conduit is enclosed in the gunwale portion.

The present invention provides inflatable watercraft that are light weight, easily stowed in relatively small spaces and formed from inflatable drop stitch panels. A preferred watercraft is a boat having a bow, stern, keel and an open transom for self-bailing. A deck can be provided as a separate panel that is cither permanently, or detachably, connected to freeboard sides of the watercraft. When connected, the deck provides a sitting area, and enhances the strength and rigidity of the watercraft by functioning like a deck beam. Optional features include a bucket held in place by, and fitted through, a hole in the deck panel. Preferred inflation pressures are between 2 and 25 p.s.i., and more preferably between 12 and 18 p.s.i.

The present invention provides inflatable watercraft that are light weight, easily stowed in relatively small spaces and formed from inflatable drop stitch panels. A preferred watercraft is a boat having a bow, stern, keel and an open transom for self-bailing. A deck can be provided as a separate panel that is cither permanently, or detachably, connected to freeboard sides of the watercraft. When connected, the deck provides a sitting area, and enhances the strength and rigidity of the watercraft by functioning like a deck beam. Optional features include a bucket held in place by, and fitted through, a hole in the deck panel. Preferred inflation pressures are between 2 and 25 p.s.i., and more preferably between 12 and 18 p.s.i.