US 12,103,651 B2
Multi-function oar
Tien Tsai Tseng, Taichung (TW)
Assigned to CHUAN JIING ENTERPRISE CO., LTD., Taichung (TW)
Filed by Chuan Jiing Enterprise Co., Ltd., Taichung (TW)
Filed on Nov. 23, 2021, as Appl. No. 17/534,113.
Prior Publication US 2023/0159146 A1, May 25, 2023
Int. Cl. B63H 16/04 (2006.01); B63B 13/00 (2006.01); F04B 1/22 (2006.01); F04B 9/14 (2006.01)
CPC B63H 16/04 (2013.01) [B63B 13/00 (2013.01); F04B 1/22 (2013.01); F04B 9/14 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A multi-function oar, comprising:
an oar blade, having a tube-connecting portion, the tube-connecting portion having a top end and a bottom end, a pair of plate portions being provided at two opposite sides of the tube-connecting portion, the tube-connecting portion further having an axial hole passing through the top end and the bottom end, the axial hole having means for positioning in the top end and means for positioning in the bottom end;
a large-diameter tube, inserted in the axial hole and movable axially, the large-diameter tube being provided with a first check valve facing the bottom end of the tube-connecting portion for controlling water to flow only in a direction from the bottom end toward the large-diameter tube, one end of the first check valve, opposite to the oar blade, having a bail opening, the first check valve having means for blocking the bail opening, the means for blocking cooperating with the means for positioning in the top end or the means for positioning in the bottom end;
a small-diameter tube, one end of the small-diameter tube, facing the oar blade, being provided with a second check valve for controlling water to flow only in a direction from the large-diameter tube toward the small-diameter tube, the small-diameter tube being inserted in the large-diameter tube and movable axially, an accommodation space whose volume being changeable being formed between the first check valve and the second check valve, another end of the small-diameter tube, opposite to the large-diameter tube, being provided with an operating member, the operating member having a water outlet and a passage communicating with the small-diameter tube; and
wherein the top end of the tube connecting portion has means for controlling movement of the large-diameter tube relative to the oar blade, and an end of the large-diameter tube opposite the oar blade has means for controlling movement of the large-diameter tube relative to the small-diameter tube.