Patent ID: 8991799
Filing Date: 2015-03-31
Classification: E21B,F16F

Abstract:
1. A shock absorbing assembly, comprising: a front plate; a rear plate having opposing side edges and a pair of engagement plates extending from proximate the respective opposing side edges toward the front plate, the rear plate having a plurality of holes therein; a plurality of shock absorbing spacers stacked in series and interposed between the front plate and the rear plate, at least some of the spacers being positioned between the engagement plates, each spacer having a plurality of holes therein; and a plurality of fasteners extending from the front plate and through the holes in the plurality of spacers and the holes in the rear plate, the fasteners maintaining the spacers in position between the front plate and the rear plate; wherein the front plate, the rear plate, and the spacers each has a predetermined shape, the predetermined shape comprising at least a rectangle having a top edge and a bottom edge, and wherein a first set of the holes is below the top edge and a second set of the holes is below the first set of the holes and above the bottom edge, and wherein the fasteners extending through the first set holds the front plate, rear plate, and spacers together more loosely than the fasteners extending through the second set holds the front plate, rear plate, and spacers together.