US2527040A

US2527040A - Metal oar

Info

Publication number: US2527040A
Application number: US732398A
Authority: US
Inventors: Erich S Swenson; Emil W Schwanz
Original assignee: Flour City Ornamental Iron Co
Current assignee: Flour City Ornamental Iron Co
Priority date: 1947-03-05
Filing date: 1947-03-05
Publication date: 1950-10-24
Anticipated expiration: 1967-10-24

Description

Oct. 24, 1950 E. s. SWENSON ETAL METAL OAR Filed March 5, 1947 Jive/$0725 [772% Di jive/2X02 5 W I 4% p} 4 w H HHHUHHHHHHHHRHHa F 0 Z 9 6 V 5 6 M W. ..W I

- Fatented Oct. 24,

,METAL oAR Erich fs. Swen'soh and Emil jwsehwanz,

Minneapolis, 'Mifim; a'ssignorsio The Flour City sprains.

Our invention relates "to rowing oars and the like and has -for its primary object the provision of an oar which is extremely light in weight,

rugg'ed in construction, andrelatively simple to manufacture.

Another object of our invention is the provision of an oar which can be manufactured irom-light-weight sheet metals at a relativelyl'ow A still further 'irnportafitobject of our invention is the-provision of cars which are internally proof.

The above and still further objects of our invention will become apparent "fioin the following detailed specification, appended claims, and attached drawings.

Referring to the drawings wherein like characters indicate like parts throughout the several views:

Fig. 1 is a front elevation of our improved oar;

Fig. 2 is a side elevation thereof;

Fig. 3 is a fragmentary section on an enlarged scale, taken on the line 3-3 of Fig. 1;

Fig. 4 is a fragmentary longitudinal section on an enlarged scale, taken on the line 4-4 of Fig. 1;

Fig. 5 is an enlarged transverse section, taken on the line 5-5 of Fig. 2; and

Fig. 6 is an enlarged transverse section, taken on the line 6-6 of Fig. 2.

Referring with greater particularity to the drawings, the numerals I and 2 indicate shelllike matching sections which, when joined together as hereinafter described, form the loom "Ornamental Iron 00., Minneapolis, Minn, a

- eomarationdfminnesota V 1 A pe la on March 5, 1947, Ser ial No.j7s2 ,39s

portion 3 and blade portion 4 of our novel oar;

Sections I and 2 may be constructed from any sheet metal but preferably from some light-weight sheet metal such as aluminum, magnesium, or the like. Each of the shell-like sections I and 2 are provided with laterally-projecting flanges 5, which extend continuously around the two sides of the sections I and 2 and the blade end thereof and which are fused or otherwise secured together to thereby provide a water-tight seal.

11p, of matching semi-circular ect onsiafa-ndjab. The loom portion 3 and the telescoped reinforcing sleeve "8 are pierced asat 19; to "receive a transversely extended oar lock sleeve Hi In practice,

the sleeve I I] is initially provided with reduced end'portions II whichiare fcaused 'tofextend through the holes '9 'asthe matching sections I,

"Brita, and 8b are fused together." Thereafter-{the *opposite reduced ends ofthe sle'c' *Ii) are 'peened' as at. l2, to wedge; the-adjacentkedges of the openings 9 in the loom 3 and reinforcing sleeve 8 therebetween. A pair'ofoarlock bushlugs 13, preferably made of *wood'or "other light bearing materiaL are'pressed into the sleeve H1,

one from each opposite end thereof. An car look pin, not shown, is adapted to extend through aligned openings M in the bushings I3.

A handle I5 having a shank I6 thereon is seated in the outer end of the loom 3 and projects axially outwardly therefrom. The shank I6 is provided with spaced annular grooves I1 and Ill. The shank I6 is of a size to fit snugly into the end of the loom 3 and when so placed, an annular groove I9 is rolled into the loom 3 nesting in the groove ll of the shank. The extreme outer end of the loom 3 is inturned to tightly fit into annular groove I8, as indicated at 20, to form a watertight seal therebetween.

The weight and thickness of the metal used and the water-tight sealing of all joints combine to provide an oar which 'is not onl very rigid, but is, also, light enough to float in the water; so that if an oar is accidentall dropped in the water, it will not sink and be lost.

While we have disclosed a perfected embodiment of our invention, it should be obvious that the same is capable of modification without departure from the scope of the appended claims.

What we claim is:

l. A metallic oar comprising opposed matching shell-like sections secured together at their edges to form blade and loom portions, the blade portions of said sections being spaced adjacent their edges and inwardly concave to provide central abutting engagement, one with the other thereof, an axially extended reinforcing sleeve associated with said loom portion intermediate its ends, a transverse sleeve extending through said reinforcing sleeve and said loom sections, and a handle projecting longitudinally outwardly from the end of said loom portion.

2. A metallic oar comprising opposed matching shell-like sections secured together at their edges to form hollow blade and loom portions, the blade portions of said sections being spaced edge,

shell-like sections each having laterally-extended t.

flanges, said sections being secured together at the flanges thereof to form blade and 100m portions, the blade portions of said sections being spaced adjacent their flanged edges and inwardly concave to provide substantially central abutting engagement one with the other thereof; said blade portions being secured together at their engaging intermediate portions, an axially-extended reinforcing sleeve in said loom portion intermediate its ends, a transverse sleeve extending ,through said reinforcingsleeve and said loom sections, and a handle projecting longitudinally ,outwardly from the end of said loom portion.

4. A metallic oar comprising a pair of opposed :mat ching shell-like sections each having laterally projecting flanges extending continuously around two sides and one end thereof, said sections being secured together continuously at the flanges thereof to form hollow blade and loom portions, the blade portions of said sections being spaced adjacent their flanged edges and inwardly concave to provide substantially central abutting engagement one with the other thereof, said blade portions being secured together at their engaging intermediate portions, a reinforcing sleeve telescoped in said loom portion intermediate its ends. a transverse sleeve extending through and having locking engagement with said reinforcing sleeve and said sections, and a shank-equipped handle projecting longitudinally outwardly from the open end of said loom portion, the shank of said handle being contained Within said loom and having an 'annular groove, the extreme end of said loom being inturned to provide locking engagement with the annular annular groove in said shank.

5. The structure defined in claim 4 in which the connections between said sections, the connections between said transverse sleeve and said sections, and the connection between said loom portion and said handle are of a water-tight nature.

ERICH s. SWENSON. EMIL W. SCHWANZ.

' REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 684,868 Robison Oct. 22, 1901 738,053 Murdock Sept. 1, 1903 1,003,069 Shea Sept. 12, 1911 1,740,560 Andrews Dec. 24, 1929 1,742,260 Keenan Jan. 7, 1930 2,353,662 Goldman July 18, 1944