Collarless barbell sleeve
First Claim
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1. A weightlifting assembly for use with weight plates comprising a central opening, whereby said weightlifting assembly comprises:
- a. a weight bar,b. one or more plungers that radially rise and retract from one or more openings in the outer cylindrical face of the bar end causing said plunger or plungers to radially press against the wall of the central opening of weight plates, andc. a means for controllably raising and retracting said plunger or plungers, said means being actuable in one direction to cause the plunger or plungers to rise, and actuable in the reverse fashion, thereby causing the plunger or plungers to retract to their original position.
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Abstract
A means of quickly securing and unsecuring plates on the ends of barbells, dumbbells, and similar exercise equipment without the use of separable collars. The plates are secured by means of one or more plungers that are actuated by an internal mechanism that causes the plunger or plungers to rise above the outer circumference of the end of the bar.
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Citations
13 Claims
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1. A weightlifting assembly for use with weight plates comprising a central opening, whereby said weightlifting assembly comprises:
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a. a weight bar, b. one or more plungers that radially rise and retract from one or more openings in the outer cylindrical face of the bar end causing said plunger or plungers to radially press against the wall of the central opening of weight plates, and c. a means for controllably raising and retracting said plunger or plungers, said means being actuable in one direction to cause the plunger or plungers to rise, and actuable in the reverse fashion, thereby causing the plunger or plungers to retract to their original position. - View Dependent Claims (2, 3)
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4. A weightlifting assembly for use with weight plates comprising a central opening, whereby said weightlifting assembly comprises:
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a. a weight bar, and b. a plunger in the form of a helical member which is situated in a spiral guide slot in the bar end wherein the helical member can be controllably urged by an actuating means to radially expand outwardly from the guide slot causing said helical member to contact with the inner wall of the central opening of weight plates and to rise above the portion of the outer cylindrical surface of the bar end that is not covered by the central opening of the weight plates, and which helical member can thereafter be controllably retracted inwardly to its original position by said actuating means. - View Dependent Claims (5, 6, 7, 8, 9, 10, 12, 13)
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11. A weightlifting assembly for use with weight plates comprising a central opening, whereby said weightlifting assembly comprises:
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a. a weight bar, and b. plungers extending through guide holes in the end of the weight bar, each of said plungers having guide means on the outer cylindrical face of the end of the weight bar, the inner ends of each plunger being operatively connected to an actuating means wherein the plungers are forced outwardly of said outer cylindrical face of the end of the weight bar when the actuating means moves in a first direction and retract inwardly when the actuating means moves in a second direction, thereby causing said plunger or plungers to radially press against the wall of the central opening of weight plates when the actuating means moves in said first direction and to retract from the wall of the central opening of weight plates when the actuating means moves in said second direction.
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Specification