US1609117A

US1609117A - Cushioning device for handles

Info

Publication number: US1609117A
Application number: US127161A
Authority: US
Inventors: Charles C Hansen
Original assignee: Ingersoll Rand Co
Current assignee: Ingersoll Rand Co
Priority date: 1926-08-04
Filing date: 1926-08-04
Publication date: 1926-11-30
Anticipated expiration: 1943-11-30

Description

Nov. 30, 1926. H 1,609,117

C. C. HANSEN CUSHIONING DEVIQE FOR HANDLES Filed August 4. 1926 INVENTOR, 770018661 BY v Patented Nov. 3%),

; i mean? rice.

CHARLES C. HANSEN, OF EASTON, PENNSYLVANIA,

T EhTGERSOLL-RAND COMPANY, 035 JERSEY CITY, NERV JERSEY, A CGJZQEOEZVATION OF NEW JERSEY.

OUSHIONING DEVICE FOR HANDLES.

Application filed August 4, 1.926.

This invention relates to crank handles, but more particularly to a cushioning device for the grip portion of a crank handle.

Thepresent invention is particularly applicable to rock drills of the type in which relative longitudinal movement between the drill and its mounting is obtained by means of a feedscrew adapted to be manually rotated by means of a suit-able crank handle, or for other machines in which excessive vibration is set up during their operation and in which it'is necessary for the operator to maintain a constant hold on the handle.

' The objects of the invention are to cushion the grip portion of the crank handle in order to'protect the operators hand against injury which might otherwise be caused by the excessive vibration of the crank handle.

Other objects will be in part obvious and in part pointed out hereinafter.

The'invention consists of the combination of elements and features of construction substantially as hereinafter described in the appended claims and illustrated in the accompanying drawings, in which Figure 1 is an elevation of a crank handle equipped with a cushioning device constructed in accordance with the practice of the invention,

Figure 2 is a transverse sectional. view taken through Figure 1 on the line 22 looking in the direction of the arrows,

Figure 3 is an elevation of aportion of the crank handle equipped with a modified form of cushioning device, and

Figure 4 is a transverse sectional view taken through Figure 3 on the line 4.4L looking in the direction of the arrows.

Referring to the drawings, the invention is shown applied to a crank handle A. having a bore B for the reception of an end of a feed screw of a rock drill or other similar element (not shown) to which the crank handle A may be applied. The crank handle A in this instance is provided with a lateral grip C having an outer enlarged portion D and a portion E intermediate the enlarged port-ion D and the arm F of the crank handle A. The intermediate portion E is in this instance of smaller diameter than the outer portion E as is customary in handles of this type.

Means is provided for absorbing the vibration of the crank handle A when the said crank Serial No. 127,161.

crank handle A. is used for the purpose of actuating a feed screw of a rock drill or other similar machine in which excessive vibration is set up during the operation of the machine. I To this end a yieldable sleeve G, preferably of rubber, is arranged about the grip C which it encircles and is preferably of a length to permit its outer end to extend partly beyond the end of the enlarged portion D of the grip O.

In order to enable the sleeve G to rotate freely on the grip C, a ferrule H is inserted in the sleeve Gr and has an enlarged portion J inclined at its ends as at K and L to engage correspondingly inclined portions of the grip C for preventing relative longitudinal movement between the sleeve G and the grip. A portion O of the ferrule H, of smaller diameter than the port-ion J, encircles the reduced portion E of the grip G and is preferably of a length to contact with the portion'E at a point adjacent the arm F. The ferrule H is in this instance split 1n half sections P for convenience of assembling same on the grip O and is held in assembled position by the constrictive action of the sleeve G.

In assembling the device, the ferrule sections P may first be placed in position on the grip C and the sleeve Gr may then be telescoped over the, sections P. The sections 1? will thus be held securely in position by the sleeve, since the internal diameter of the sleeve G is preferably slightly smaller than the diameter of the small portion 0 of the ferrule H.

The present invention has been found to be an eflicient means for protecting the operator of rock drills and similar machines against the effects of excessive vibration. Heretofore, considerable discomfort has at times been caused to the operator of such machines due to bruises and other injuries caused by the vibratory action of the crank handle. This is particularly true in the operation of certain types of rock drills in which the operator must of necessity maintain a constant grip on the feed screw crank for feeding the drill steel into the rock. This objectionable feature has been entirely eliminated by the present invention and as a result the efficiency of the drill may be considerably increased.

In the modification illustrated in Figures 3 and 4, a rubber ferrule or bushing Q is arranged about the reduced portion E of the grip Gland ,is-ofia l'engthvtoi: contact with its ends on inclined surfaces R andS of the grip C to hold the bushing Q against endwise movement Withrespect" to the grip.-

as at T to enable it to be quickly arranged about the grip C.

In the present instance, a sleeve U of suit able length is disposed-about the grip C and is preferably of such diameter that Whenit is in assembled position on the grip C it \vill be somewhat expanded on theenlarged portionDofthe grip G to assist in preventingrelative longitudinal movement between the grip and-the sleeve.

Any suitable means may be-pr0vided for holding the sleeve U and the bushingQQin assembledrelationship with respect to each other, in the present instance, rivets V are employedjor this purpose and t-heheadsof these rivets are preferably drawn into the sleeve U to prevent cont-act? thereof with the operatorsyliand.

In assembling the devicedescribedin this modification, the bushing Q1 may first be placed about the grip (land the sleeve. U may. then be disposedabout the saidlb'ushr ing-and-the' grip G, Thereafter the rivets Vinaybedriven through the bushing and the'sleeV-einsuch manner that the pointsof the'rivets wi-11.bespreadon the grip Cf. to

.L bushingyQ' is preferably split on one side prevent accidental separation of the Sleeve and the bushing! I' claim:

1'. A cushioning device for a handle, comprising a yieltlablesleeveencircling-the handle, and ineans si-ir-rounded'by the sleeve to engage the handle for preventing endwise movement of thesleeve With respect to the handle, said means. being detachable from the sleeve.

2.. A, cushioning device for a. handle=havingainenlarged portion; .comprising a .yieldable Sleeve encirclingthe. handle anda ferrules interposed between. the. handle. and the sleeve to engage; the enlarged portion for preventing; relative longitudinal. movement between i the handler and .the sleeve, .said" ferrule beingheldiin engagementlwith.the handle by. the sleeve.

3. Ai cushioning devicefor a handlehaving an enlarged'portion, comprising a yieldable sleeve eneirclingthe liandle and-a split ferrule interposed between the handles and the sleeve to engage the enlarged 'portionfor preventing relative longitudinal movement between, the handle and the. sleeve,. said sleeve and said ferrule being freely rotatable on the handle.

In testimony whereof .1" have signed this specification.

CHARLES GI. HANSEN.