Drilling unit for stadium seats
AssigneeLawrence Brothers, Inc.
InventorsJames Zbinden, George W. Ries
Life of this patent
Estimating the term…
Abstract
A drilling machine is disclosed for use in providing bolt holes in concrete stadium riser steps and the like. The drilling machine includes a relatively stationary base plate, and a foot plate slideable upon the base plate along a predetermined path. The foot plate carries drill mounting means for mounting a plurality of commercially available drills. An operating lever moves the foot plate, drill mounting device and drills toward and away from a vertical drilling face over the base plate. BACKGROUND OF THE INVENTION
Claims17
A device for drilling a plurality of holes in a vertical face such as a stadium step riser, comprising, in combination, a base plate, drill mounting means including a movable foot plate, guide means interconnecting the base plate and foot plate to permit the foot plate to be slid over the base plate toward and away from the vertical face along a predetermined path, at least one upright standard, standard mounting means on the foot plate permitting the upright standard to be selectively affixed to and detached from the foot plate, a platform carried by the upright standard for linear vertical motion thereupon, means for affixing the platform relative to the standard in any one of a vertical range of positions, and means carried on the platform for selectively affixing to the platform a drill motor and carried drill, and lever means connected to the drill mounting means for urging the drill mounting means along the base plate toward the vertical face.
A device for drilling a plurality of holes in a vertical face such as a stadium step riser, comprising, in combination, a base plate, a movable foot plate slideable over the base plate toward and away from the vertical face along a predetermined path, drill mounting means for mounting a plurality of drills for motion with the foot plate, the drill mounting means including a plurality of upright standards, standard mounting means affixed to the movable foot plate and permitting the standards to be selectively affixed to and detached from the foot plate, a plurality of platforms retained upon the standards, mounting means on each platform being adapted to mount on the platform at least one drill and drill driving motor, means for securing the platforms in any one of a range of desired vertical positions upon the standard and for adjusting the platforms with linear motion into desired vertical positions on the standard, and means for urging the drill mounting means along the base plate toward the and away from the vertical face.
Dependencies are inferred from the claim text.