Specifications

The Patent Office Journal 17/12/2010
4607
(12) PATENT APPLICATION PUBLICATION (21) Application No.120/CAL/1999 A
(19) INDIA
(22) Date of filing of Application :16/02/1999 (43) Publication Date : 17/12/2010
(54) Title of the invention : MANUALLY OPERATED PROPULSION DEVICE FOR WATERCRAFT
(51) International classification
:B63H
21/175
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(86) International Application No
Filing Date
:NA
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(71)Name of Applicant :
1)CAWAS PHIROZE NAZIR
Address of Applicant :FLAT NO. 1, 5A DILKUSHA
STREET, CALCUTTA West Bengal India
(72)Name of Inventor :
1)CAWAS PHIROZE NAZIR
(57) Abstract :
A manually operated propulsion device for watercraft comprising of a seat carried by a bicycle type frame for supporting a body
thereon having two driving mechanisms, one hand operated and the other pedal operated which drive a propellor through chain and
sprockets. According to this invention, the hand operated drive comprises an axle fitted in an housing and has secured to it bent shaped
hand cranks with hand grips and large chain wheel. This chain wheel drives by chain another chain wheel mounted on the pedal
operated drive. The pedal operated drive has two chain wheels which are operated by pedal cranks. The second chain wheel is
connected by chain to a sprocket mounted on a hub which is rotatabaly mounted on axle secured to the chainstays of the main frame.
On the hub is also mounted a crown wheel of a bevel gear. This crown wheel engages a bevel pinion on the axle of which is mounted
another chain wheel which drives by chain a sprocket on the propellor shaft and the propellor. The housing of propellor shaft is
enclosed in a hollow streamlined strut. To the propellor shaft is attached a propellor. The diameter of hand cranks and pedal cranks is
kept the same. Similarly the diameter and number of teeth for chain wheels on the hand operated drive and the pedal operated drive is
kept the the same. A short arm extends from hollow strut to which is attached a rudder. The rudder is operated by lever attached to
handle on handle stem. The rudder is provided to steer the watercraft. The device is connected to the cross members of twin hulls
attached in a catmaran type watercraft. The device can also be connected to a monohull watercraft.
No. of Pages : 18 No. of Claims : 7