US2175594A

US2175594A - Sled

Info

Publication number: US2175594A
Application number: US267039A
Authority: US
Inventors: Eberhardt Walter
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-04-10
Filing date: 1939-04-10
Publication date: 1939-10-10
Anticipated expiration: 1956-10-10

Description

Oct. 10, 1939. w. EBERHARD-r 2,175,594

SLED

Filed April l0, 1939 i ll/l Patented Oct. 10, 1939 UNITED STATES PATENT OFFICE 2 Claims.

My invention relates to a means for propelling sleds by manual operation by a person sitting thereon.

The principal object of my invention is the .5 provision of independent lever controlled mechanism attached to each side of the sled supplying proper propulsion for a sled, and arranged to be controlled and operated manually; each hand operating independently a set of levers so that l the sled may be propelled either in a forward direction or by manipulating one side in a certain manner it may effect the steering of the said sled either to the right or left.

A further object of the invention is the provision of simple means in order to cancel or nullify the lifting moment resulting from the translation of radial motion to direct forward motion.

Another object of my invention is to provide a simple, durable, efficient, and useful device which can be manufactured economically in quantity production.

Other features may become apparent from the ensuing description and the accompanying drawing wherein like symbols are used to designate like parts and in which:

Fig. 1 is a side View of a sled to which is attached my invention.

Fig. 2 is a top view of Figure 1.

3o Fig. 3 is a longitudinal cross-sectional view on the line 3-3 of Figure l.

Fig. 4 is a cross-sectional View on the line 4-4 of Figure 1.

Referring to the drawing in Figure 1, 6 denotes, generally, a sled which is made up of a top supporting member designated by the numeral I6, resting on two runners designated by the numeral 8 and having curved portions at the forward end designated by the numeral I1.

The runners are provided with props or supports designated by the numeral 1, having recessed portions I8 for lightness and strength, which support the upper platform designated by the numeral I6.

The front portion 'I of the runners is provided with a boss designated by the numeral 9 adapted to receive a connecting pivot shaft designated by the numeral I0 having a head II on one side and a threaded portion on the other adapted to receive a nut designated by the numeral I2.

This structure is provided in order to support the levers designated by the numerals I3, which have a hole adapted to be pivoted on the rod structure I0. These levers have a channel section as indicated by the numeral I5, and a hub extension designated by the numeral I9 for purposes to be later explained.

Within the channel portion I5 and at the hub portion I 9 is mounted a propelling lever designated by the numeral 28 and having a sharp edge 5 or point designated by the numeral 29 which is adapted to anchor to the ground when the combined levers are moved in a direction of the arrow to the dotted position so as to effect their propelling action of the sled in a forward direc- 10 tion.

The levers I3 are supplied with suitable handle portions designated by the numeral I4, and are drilled in order to receive the pivot unit designated by the parts 2I and 23. The portion 2| is 15 a stud having a threaded hole designated by the numeral 22 adapted to receive the screw designat-ed by the numeral 23.

These two screw studs secured together help to hold in place the spring 24 having one extension 20 25 anchored to a hole 21 drilled in the lever I3 the other extension 26 anchored at a point in a hole of the lever 28, the coil portion of the spring being coiled about the body of the screw 23.

It will be noted that in the lever I3, I provide 25 a slot 20 which is adapted to take up the lifting moment of the lever I3 when it is moved from the full position to the dotted position. Since, in the arc it describes, there is a small chordal distance which the lever I3 would have to traverse or lift 30 the sled as a result of the arcuate motion; by providing the lost motion of slot 20, I nullify the lifting moment and translate the radial action or motion of the lever I3 into a direct horizontal motion of the sled thus completely eliminating 35 the lifting moment involved.

In order to operate my invention, a person desiring to take a ride on the sled, will sit on the platform 6 facing toward the front of the runners, the curved portions I'I, and by propelling 40 the levers I4 in a direction shown by the arrow to the dotted position, both of the levers being operated simultaneously a forward propelling action will result.

The slot 20 aiding in providing a true transla- 45 tion of the arcuate motion to the forward propelling motion eliminating the lifting moment because of the lost motion provided by the said slot 20.

When it is desired to steer the sled from its 50 straight and direct forward course, by operating the left lever, the sled will be steered or diverted to the right, and vice versa, by operating the right lever and holding the left lever motionless the sled will steer to the left. 55

Up to the present time sleds are usually built in a manner whereby it is necessary for someone either to pull the rider along, or a rider usually grasps the sled up against his body, runs with it to acquire enough .momenturm and then throws his body down on the sled in order to travel along for a distance, until all of the momentum or potential energy is consumed.

With my sled, that will not be necessary, it can be more conveniently operated and propelled, and may be used on horizontal surfaces, where the sled may be moved along by virtue of the mechanism I have supplied and expounded herein as the subject matter of my invention.

Altho I have described in succinct terms the structure and description of my invention, and inasmuch as it may be susceptible of many alterations, modifications, and improvements, I reserve the right to all such alterations, modifications, and improvements coming within the scope of my invention and within the purview of the appended claims, it being understood that my invention is to be limited only by the prior art and the subjoined claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A device of the character described comprising, an operating lever articulately mounted on each side of a sled, the said operating lever provided with an elongated slotted bearing, a propelling lever mounted swivellably and slidably in said elongated bearing, and means for securing said propelling lever in said elongated bearing comprising, a male stud engaging a female stud, the said combined leverage mechanism adapted to propel a sled.

2. A device of the character described com prising, an operating lever articulately mounted on each side of a sled, the said operating lever provided with an elongated slotted bearing, a propelling lever mounted swivellably and slidably in said elongated bearing, means for securing said propeller lever in said elongated bearing comprising, a male stud engaging a female stud, and spring means adapted to maintain the said propelling lever in contact with the ground, the said combined leverage mechanism adapted to propel a sled.

WALTER EBERHARDT.