Abstract: A quick-release device is for securing a rod of any gas cylinder into the plate of any chair, item of furniture, or other device supported by a gas cylinder and activating the rod with a button thereon. This universal quick-release device includes a sleeve in in the seat plate, an adapter fit into the sleeve, the adapter including an upper portion and a lower portion with different inner and outer diameters. The sleeve is configured to receive the lower portion of the adapter in a press-fit engagement. The upper portion is configured to receive the rod of the gas cylinder in a removable engagement.

Abstract: A quick-release device is for securing a rod of any gas cylinder into the plate of any chair, item of furniture, or other device supported by a gas cylinder and activating the rod with a button thereon. This universal quick-release device includes a sleeve in in the seat plate, an adapter fit into the sleeve, the adapter including an upper portion and a lower portion with different inner and outer diameters. The sleeve is configured to receive the lower portion of the adapter in a press-fit engagement. The upper portion is configured to receive the rod of the gas cylinder in a removable engagement.

Abstract: A quick-release device for securing a gas cylinder in a seat plate includes a pedestal defining a socket for receiving the gas cylinder. The pedestal projects upwardly from an endwall to form a jaw against which the gas cylinder is received when applied to the socket. A clamp is pivoted to the jaw for movement between an open position and a closed position. A flange is formed in the pedestal and has a lower surface for confrontation with the seat plate. A latch is coupled to the pedestal. The latch moves between a first position enabling movement of the clamp between the open and closed positions, and a second position disabling movement of the clamp between the open and closed positions.

Abstract: A footrest device for supporting feet apart from a cylinder includes a central hub, an outer ring spaced apart from the central hub, and spars, each extending radially from a proximal end, on the first jaw of the hub, to a distal end on the ring. The hub is a clamp with an open condition and a closed condition for clamping onto the cylinder, and it includes first and second jaws pivoted to each other to open and close the hub about a space configured to receive the cylinder. A latch assembly opens and closes the first and second jaws with respect to each other.

Abstract: A gas cylinder quick release device has an upper bearing plate, and a lower annular collar arranged below the upper bearing plate on an axis common to the upper bearing plate and the lower annular collar. A handle is mounted to move between a first position and a second position. Movement of the handle from the first position to the second position imparts axial displacement of the upper bearing plate and the lower annular collar away from each other along the axis. The lower annular collar moves downward along the axis when the lower annular collar is axially displaced away from the upper bearing plate.

Abstract: A gas cylinder quick release device has an upper bearing plate, and a lower annular collar arranged below the upper bearing plate on an axis common to the upper bearing plate and the lower annular collar. A handle is mounted to move between a first position and a second position. Movement of the handle from the first position to the second position imparts axial displacement of the upper bearing plate and the lower annular collar away from each other along the axis. The lower annular collar moves downward along the axis when the lower annular collar is axially displaced away from the upper bearing plate.

Abstract: A gas cylinder quick release device has a cylindrical upper assembly, a cylindrical lower assembly arranged below the upper assembly on a common axis, and a handle which is mounted to move between a first position and a second position. Movement of the handle from the first position to the second position imparts axial displacement of the upper and lower assemblies away from each other along the axis, thereby breaking a press-fit engagement of a wheelbase otherwise secured on the gas cylinder.

Abstract: A gas cylinder quick release device has a cylindrical upper assembly, a cylindrical lower assembly arranged below the upper assembly on a common axis, and a handle which is mounted to move between a first position and a second position. Movement of the handle from the first position to the second position imparts axial displacement of the upper and lower assemblies away from each other along the axis, thereby breaking a press-fit engagement of a wheelbase otherwise secured on the gas cylinder.

Abstract: A method of selecting and displaying an item on a display screen uses a pointing and selecting device including a control button. Displayed, on the screen, are (i) a multifaceted three dimensional object having a fixed center and having at least one side including at least a representative window of a first item to select and display, and (ii) a fixed pointer. The representative window includes a link to the item to be selected and displayed. The three dimensional object is rotated on the screen about the fixed center with respect to three free orthogonal axes, by the manipulation of the pointing device. The representative window of the item to be selected and displayed is superimposed with the displayed pointer at the center of the three dimensional object, for the selection and display on the display screen of the item to be selected and displayed by pushing the control button of the pointing device.