Patent ID: 7022052

Claim:
A collapsible boat rowing simulator comprising: a beam having a guide in each of lateral sides longitudinally extended along the length thereof; a T-shaped front support having a transverse bar standing on the ground, an arcuate portion connected to front end of said beam through a sleeve and secured by a shoulder bolt and screws, a slant plate centrally projected upward from front end of said T-shaped front support for disposing a counter thereon, a first cross rod on an upper portion of the slant plate for respectively disposing a pair of tread plates; a rear support having a semi-circular plate standing on the ground, a slant post centrally projected upward, a second cross rod on lower portion of the slant post and a first rectangular plate on top of the slant post for securing said rear support onto an underside of said beam abutting rear end thereof by screws; a middle support having a vertical post, a third cross rod on an upper portion of said vertical post and a second rectangular plate on top of said vertical post for securing said middle support onto a middle underside of said beam by screws; a pair of oars each having a large vertical tube on inner end, a small vertical tube on outer end and a stop rod projected upward from an upper periphery adjacent said large vertical tube thereof; a pair of T-shaped tubes each having a vertical portion inserted through the large vertical tube of said oars and secured on lower end by an elastic fastener and a screw and a transverse portion respectively and rotatably sleeved on two ends of the third cross rod of said middle support and secured by screws; a pair of arcuate grips each having a vertical axial rod at inner end rotatably inserted into the small vertical tube of said oars and secured by screws with washers engaged therebetween; a pair of hydraulic cylinders each having a rear end respectively pivoted to two ends of the second cross rod of said rear support secured by screws with bearings and washers engaged therebetween and a front end pivoted to an opening of said elastic fasteners and secured by screws and nuts; a U-shaped slider slidably mounted on said beam having four rollers spacedly and rotataly secured to inner side of two lateral walls slidably engaged into the guides of said beam respectively and a seat secured to top of said U-shaped slider by a plurality of screws.