US230314A - Bichard mcmanus - Google Patents

Bichard mcmanus Download PDF

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Publication number
US230314A
US230314A US230314DA US230314A US 230314 A US230314 A US 230314A US 230314D A US230314D A US 230314DA US 230314 A US230314 A US 230314A
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Prior art keywords
mcmanus
oar
bichard
blade
richard
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Expired - Lifetime
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63HMARINE PROPULSION OR STEERING
    • B63H16/00Marine propulsion by muscle power
    • B63H16/04Oars; Sculls; Paddles; Poles

Description

(No Model.)
R. MGMANUS.
' Oar.
No. 230,314. Patented July 20,1880.
UNITED STATES PATENT OFFICE..
RICHARD MCMANUS, OF BOSTON, MASSACHUSETTS.
OAR.
SPECIFICATION forming part of Letters Patent No. 230,314, dated July 20, 188C.
Application filed May 3l` 1880. (No model.)
To all whom lt may concern Be itknowu that I RICHARD MCMANUS, of Boston, in the State ot' Massachusetts. have invented an Improved Oar, of which the following` is a specification.
I have represented in the drawing a blade of an oar containing),` my invention.
It is well known to oarsmen that when the oar in rowing' rst strikes the water there is a considerable jar or shook, o overoine which the oarsinan mustexert more strength than would otherwise he necessary. To overcome this I place in the blade of lthe oar a number of holes or instead of the holes slots or square openings, or both, may be used. I make the blade ot' the oar longer and wider, so as to present the. same amount ot' surface for the propulsion of' the boat. as the blade of the oar has when made in the ordinary way.
It will be found that my oar, in addition to zo RICH ARI.) MCMANUS.
Witnesses GEORGE H. HosMER. OHAS. H. DREW.
US230314D Bichard mcmanus Expired - Lifetime US230314A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586024A (en) * 1949-02-15 1952-02-19 Frank T Glasgow Rowing machine
US5813755A (en) * 1996-11-25 1998-09-29 Proshan; Mary-Elizabeth Single blade whisk
US20080232973A1 (en) * 2005-07-21 2008-09-25 Saint Louis University Propeller blade
FR2967129A1 (en) * 2010-11-09 2012-05-11 Christophe Rouanet HYDRODYNAMIC ROW
AU2016251712B2 (en) * 2015-04-23 2019-03-14 Oscar Propulsion Ltd Oar with openings in the blade

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586024A (en) * 1949-02-15 1952-02-19 Frank T Glasgow Rowing machine
US5813755A (en) * 1996-11-25 1998-09-29 Proshan; Mary-Elizabeth Single blade whisk
US20080232973A1 (en) * 2005-07-21 2008-09-25 Saint Louis University Propeller blade
FR2967129A1 (en) * 2010-11-09 2012-05-11 Christophe Rouanet HYDRODYNAMIC ROW
WO2012066193A2 (en) 2010-11-09 2012-05-24 Christophe Rouanet Hydrodynamic oar
WO2012066193A3 (en) * 2010-11-09 2012-08-30 Christophe Rouanet Hydrodynamic oar
AU2016251712B2 (en) * 2015-04-23 2019-03-14 Oscar Propulsion Ltd Oar with openings in the blade
US10526063B2 (en) * 2015-04-23 2020-01-07 Oscar Propulsion Ltd. Oar with openings in the blade

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