US1409904A - Side-bolt construction for percussive tools - Google Patents

Description

L. c. BAYLES.- v SIDE BOLT CONSTRUCTION FOR PERCUSSIVE TOOLS.

' APPLICATION FILED APR-24? 1920. I v Pamnted M UNITED STATES PATENT OFFIOE.-

LEWIS C. BAYLES, OF EASTON, PENNSYLVANIA, ASSIGNOR TO INGERSOLLi A COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

, SIDE-BOLT CONSTRUCTION FOR PERCUSSIVE TOOLS.

Specification of Letters Patent.

, Patented Mar. 21, 1922.

Application filed April 24, 1920. Serial No. 376,262.

T 0 (all whom it may concern Be it known that 1, Lewis C. BAYLEs, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented a certain new and useful Improvement in Side- Bolt Construction for Percussive Tools, of which the following is a specification.

This invention relates to fluid operated percussive tools but more particularly to the means usually in the form of side bolts for holding the parts of the drill casing together. In this type of tool, the drill casing consists of the cylinder and the front and back end portions, which may include front and back heads. In a stope drill for instance, selected to illustrate the present invention, the drill casing includes the cylinder portion proper and a front head, and a back end portion, all of the parts forming the casing being clamped together by suitable side bolts.

Provision is customarily made for removal of the front head as desired'by unscrewing the nuts on the front ends of the side bolts, and in ordinary constructions the back head or back end portion, may be removed by removing the bolts bodily. In such cases, loosening of the nuts on the bolts, loosens all the parts of the drill casing, and the front head, or front end portion, cannot be loosened or removed without loosening the back head, or back end portion, which in some instances is undesirable, because dirt and muddy water may enter the tool.

The primary object of the present invention is to secure a sim 1e and efficient side bolt construction whic affords provision for loosening or removing one or more of the end portions of the drill casing at either end of the tool without loosening, removing or disturbing the adjustment and alignment of the end portion or portions of the casing at the other end of the tool. Such a construction is highly advantageous in some instances and permits quick adjustment or repair of the tool while at the same time reducing or avoiding the possibilty of dirt entering those parts which otherwise might be loosened.

Another object of the invention is to provide for using double ended side bolts, having removable fastening devices, such as nuts, at each end, instead of headed bolts,

and partly in vertical section showin and secure the bolts tightening the nuts.

Further objects will hereinafter appear and to all of these ends theinvention consists of the features of construction and combinations of elements described and claimed in this specification and shown in the accompanying drawings in which- Figure 1 is a side view partly broken away so much of a stope drill as will illustrate the invention, and

F igure 2 is a transverse sectional view on the line 22 of Figure 1 looking in the dlrection of the arrows.

eferring to the drawings, A represents the main cylinder portion of the casing of a fluid operated tool, in this instance a stope drill. In the type of tool illustrated, actuated by fluid pressure, a piston B constituting a hammer, is adapted to reciprocate in the casing, the admission of fluid to the cylinder bein controlled by a throttle valve and handle 5 and a handle D is provided for the tool, these parts being of any suitable or usual construction. piston E' and the air feed cylinder F are indicated broken away at the back end of against turning while the tool and a portion of the drill steel G The air feed and a spacing piece J intermediate the main cylinder A and front head H. At the back end, the casing includes the feed cylinder flange K, head block A, the back cylinder portion L and the plate 0.

The front head H and spacing piece J together form the front end portion of the tool and the feed cylinder flange K, head block A, the back cylinder portion L and plate 0 together form the back end portion of the tool. It is to be understood, however, that the cylinder casing shown in the drawings, including the parts described, is illustrative of one form only, and the invention is not limited to the construction described, but applies to a side bolt construction for holding the main cylinder casing and the front and back end portions together, whether either or both of these front and back end portions comprise one or more parts.

I have chosen to show the side bolts P assing through the walls of the parts of the casing described, but I' am not to be understood as limiting the invention to this construction, which is illustrative only. As shown in this instance the bolts P are novided with collars Q intermediate their length forming bearing portions or stops for holding and tightly clamping portions of the casing between the collars and the tightening nuts R and R at the ends of the bolts.

' One of the portions of the casing, as the back cylinder portion L, is preferably recessed at S to a sufficient depth determined by the thickness of the collars Q for receiving and holding the bolt collars Q, and in order to prevent the bolts from turning as they are tightened the collars Q are preferably made eccentric to the axes of the bolts as shown, and the recesses S are eccentric to the holes in the casing for receiving the bolts.

In assembling the parts, the'bolts are first thrust through the back cylinder portion L, the plate 0, head block A, and the feed cylinder flange K and the nuts R at the back ends of the bolts applied. The main iylinder A, spacin piece J and front head are secured on t e bolts by the nuts R at the front, and when the bolts are tightened, the casing members or portions at the back end are held between the bolt collars or stops Q and the nuts R, while the main cylinder A and remaining portions of the casing are held between the stops Q and the nuts R at the front end of the tool. Obviously end ortions of the casing at either end may be oosened or removed as desired without loosening or removing or affecting the adjustment of the parts at the otherend of the casin I c aim y Y 1. A fluid actuated tool having a casing formed by a plurality of cylinder portions fitting together and front and back end portions, double ended side bolts extending throughout the length of said portions of the casing and entirely within the same for clamping the parts together end to end, enlargements on each of said side bolts intermediate the length thereof engaging recesses in one of the said cylinder portions of the casing, said enlargements being eccentric to the axes of the bolts and said recesses being eccentric to the holes in the casing for receiving said bolts, thus preventing rotation of the bolts, and removable tightening devices for both ends of each of the bolts, whereby the cylinder portions and end portions are in flush engagement with each other, and the part or parts of the casing between said enlargement and the tightening devices at either end may be loosened or removed without disturbing any of the parts located at the opposite side of said enlargements.

2. A fluid actuated tool having a casing formed by a plurality of cylinder portions and front and back end portions, double ended side bolts extending throughout the length of said portions of the casing and entirely within the same for clamping the parts together end to end, rigid collars on each of saidside bolts intermediate the length thereof adapted to bear against portions of the casing, removable tightening devices for both ends of each of the bolts, whereby the cylinder portions and end portions are in flush engagement with each other, and the part or parts of the casing between said collars and the tightening devices at either end may be loosened or removed without disturbing any of the parts located at the opposite side of said collars, each of said collars being eccentric to the axes of the bolts and located within recesses in the cylinder portions, said recesses being eccentric to the holes in the casing for receiving said bolts to positively prevent the bolts from turning.

In testimony whereof, I have hereunto set my hand.

LEWIS o. BAYLES.

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