Abstract: A jaw exercising apparatus includes an elongated plate having a pair of bite pads projecting from the rearward surface of opposing ends of the plate. An aperture is formed through the plate intermediate the bite pads so as to permit air flow therethrough. Each bite pad has a pair of upper and lower ridges projecting therefrom generally parallel with the plate with upper and lower biting surfaces extending between the plate and the ridges. Preferably, the entire exercising apparatus is formed as a single integral piece of resilient compressible and stretchable material such as silicone rubber. The biting surfaces of each bite pad are preferably either parallel to one another, or diverging from outward ends towards the center of the exercising apparatus.

Abstract: A push rod gauge for finding the optimum length of push rods in a push rod engine. The gauge has a mounting bracket which is affixed to a cylinder head after the rocker arm has been removed, a push rod holding channel is held by the face plate and has measuring marks on its outer surface. A push rod member is placed in the conventional position of a push rod and the cam shaft is turned. The position at which the push rod moves an equal length above and below a zero line mark is noted. A push rod is then adjusted or cut to this preferred length. The device can be used on any engine having push rods.