US1479202A - Draft coupling - Google Patents

Description

' J. OBERG DRAFT COUPLING Filed Feb. 13 1922 INVENTOR.

WITNESS:

ATTORNEY.

Patented Jan. 1, 18243.

- com: canes, or neuter, MINNESOTA.

DRAFT COUPLING.

Application filed February 13, 1922. Serial Ito. 536,333.

.To all whom c't may concern:

Be it known that 1, JOHN OBERG, a citizen of the United States, residing at Bovey, in the county of Itasca and State of Minnesota, have invented certain new and useful Improvements in Draft Couplings, of which the following is a specification.

This invention relates to improvements in draft couplings and more particularly to a coupling whereby an auxiliary team or snap team may be temporarily attached to a road scraper to assist the regular team to pull the scraper during the filling operation. The device is adapted for use particularly in road work where wheel scrapers vare used. At present it is the custom to attach the snap team to the ring in the end of the tongue of the scraper by means of a hook carried by a draft chain and considerable time is lost in hooking the team to the scraper tongue and unhooking it again.

My present invention contemplates the provision of a draft coupling to displace the old chain and hook, my coupling being instantly connected to or released from the scraper tongue and operated without efiort 0n the part of the driver of the snap team.

With the foregoing and other objects in view the invention consists in the combination and arrangement of parts to be hereinafter fully described, pointed out in the appended claims and illustrated in the accompanying drawing which forms a part of this application and in which Fig. 1 is a view showing two teams temporarily hitched together by means of my draft coupling, the team in the lead being the snap team.

Fig. 2 is a view of my draft coupling in side elevation and partly in section.

Fig. 3 is a view of the coupling in side elevation.

Fig. 4 is a fragmentary view showing the movable parts in an altered position.

Like reference characters denote corresponding parts throughout the several views.

My draft coupling comprises a frame bar 1 provided at one end with a headed hook 2 that carries the collar 3 that is secured to the evener 4 of the snap team 5. Secured to opposite sides of the frame bar 1, at one end thereof, by bolts 6 are the spaced plates 7,

8 forming in effect an extension of said bar, the free ends of said plates being connected by the bolts 9, 10. A stout hook bar 11 is fulcrumed, approximately at its curved end, upon the bolt 10, the curved end of said hook projecting beyond the plates 7, 8 and the straight portion thereof normally lying between said plates and extending parallel to the frame bar 1, said hook being yieldingly retained in normal position by the coil spring 12 which connects it with the bolt 9, said hook bar being positively but releasablyretained in normal position by means of the looped end 13 of a hand lever 14 fulcrumed upon a bolt 15 to the frame bar, said lever 14 being formed with an integral finger 16 adapted for contact with the frame bar 1 to limit the relative movement of the lever in one direction, and being provided with a leaf spring 17 that rests upon the frame bar to yieldingly limit the movement of the lever in the opposite direction.

With the draft coupling in normal position, shown in Figs. 1, 2, and 8 the curved end of the hook bar 11 is placed in the ring at the end of the tongue 18 of the scraper. The snap team is then hitched to the scraper. To release this team the driver simply pulls upon the free end of the lever 1a and moves it into substantially the position shown in Fig. 4 thus releasing the straight end of the hook bar when the weight of the load will move it into the position illustrated disengaging that bar from the scraper.

What is claimed is 1. In a draft coupling, a frame bar, parallel spaced plates bolted to one end of said frame bar and to each other, a'hook bar fulcrumed between said spaced plates, a spring connecting said hook bar and the bolt that connects said spaced plates, a lever fulcrumed to said frame bar for releasable engagement with one end of said hook bar, a finger integral with said lever for engagement with said frame'bar whereby relative movement of said members in one direction. is'limited, a spring for yieldingly preventing relative movement of said members in the opposite direction, and means for securin said frame bar to an evener.

2. In a draft coupling, a frame bar, parallel spaced plates bolted to one end of said frame bar and to each other, a hook bar fulcrumed between said spaced plates, a spring connecting said hook bar and the bolt that connects said spaced plates, a lever fu1- crumed to said frame bar'forreleasable en= gagement with one end of said hook bat, and means for securing said frame bar to an evener.

In testimony that I claim the foregoing as my own I have hereto atfixed my signal0 ture in the presence of two subscribing Wit' nesses. o

JOHN OBERG. Witnesses:

' TOM REED,

J. E. Emoxson.

Images