US2812219A - Knockdown sawhorse - Google Patents

Description

Nov. 5,1957

G. LANGE KNOCKDOWN SAWHORSE Filed March 30, 1956 Y r 60s Lange I INVENTOR.

Ammo

United States Patent KNOCKDOWN SAWHORSE Gus Lange, Belleville, 11].

Application March 30, 1956, Serial No. 575,057

1 Claim. (Cl. 304-) The present invention relates to new and useful improvements in sawhorses for use particularly but not necessarily by carpenters, and has for its primary object to provide, in a manner as hereinafter set forth, a device of this character which may be expeditiously assembled and disassembled.

Anothehr very important object of the invention is to provide a knockdown sawhorse of the aforementioned character comprising novel means for frictionally securing the beam on the supporting legs.

Other objects of the invention are to provide a knockdown sawhorse of the character described which will be comparatively simple in construction, strong, durable, compact, of light weight and which may be manufactured at low cost.

These, together with other objects and advantages which will become subsequently apparent, reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a perspective view of a sawhorse embodying the present invention, the lower portions of the legs being broken away;

Figure 2 is a view in transverse section through one of the brackets, taken substantially on the line 2--2 of Figure 1;

Figure 3 is a vertical longitudinal sectional view, taken substantially on the line 33 of Figure 2; and

Figure 4 is a perspective view of one of the brackets and beam plates, showing the members separated.

Referring now to the drawing in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a pair of brackets of suitable material, preferably aluminum, which are designated generally by the reference character 5. The brackets 5 are substantially inverted, U-shaped, each of said brackets including a bight portion 6 having formed integrally therewith downwardly divergent, substantially rectangular sockets 7. The tops of the sockets 7 are provided with vents 8. The sockets 7 are for the reception of the upper end portions of pairs of supporting legs 9 of suitable wood. The sockets 7 are further provided, in the Patented Nov. 5, 1957 outer walls thereof, with openings 10 for the reception of suitable securing screws 11. The bight portions 6 of the brackets 5 have formed therein longitudinally tapered, dovetailed channels or grooves 12, the purpose of which will be presently set forth. The lower portions of the brackets 5 are further provided with transversely extending reinforcing webs or braces 13. v

Removably mounted on the brackets 5 is a beam 14 of suitable width. Substantially rectangular plates 15 of suitable material, preferably aluminum, are mounted beneath the end portions of the beam 14. Toward this end, the corner portions of the plates 15 are provided with openings 16 for the reception 'of securing screws 17. The plates have formed integrally therebeneath longitudinally tapered or wedge-shaped, dovetail tongues 18 which are slidably engageable in the grooves or channels 12 of the brackets 5.

It is thought that the use of the device will be readily apparent from a consideration of the foregoing. Briefly, to assemble, the legs 9 are inserted in the sockets 7 of the brackets 5 and, if desired, secured by the screws 11. Of course, the plates 15 are secured longitudinally'beneath the end portions of the beam 14. The longitudinally tapered dovetail tongues 18 are then wedged in the correspondingly shaped grooves 12 for firmly but removably securing the beam 14 on the brackets 5. Of course, to disassemble the sawhorse, the foregoing procedure is reversed. The beam 14 may be of any suitable length and any desired number of pairs of support ing legs may be provided therefor.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

A knockdown sawhorse comprising: a pair of spaced, substantially inverted U-shaped metallic brackets including bight portions and downwardly divergent sockets integral therewith, said bight portions having longitudinally tapered dovetail grooves therein, supporting legs engaged in the sockets, a beam, metallic plates secured beneath the end portions of said beam and resting on the bight portions of the brackets, and longitudinally tapered, dovetail tongues depending from said plates and wedged into and frictionally anchored in the grooves for removably mounting the beam on the brackets.

References Cited in the file of this patent UNITED STATES PATENTS 802,834 Upthegrove Oct. 24, 1905 936,007 Mauborgne Oct. 5, 1909 1,114,336 Blomquist Oct. 20, 1914 1,951,656 Haflling Mar. 20, 1934

Images