Weight plate retention collar
View Patent ↗A retention collar for securing weights to a barbell that includes two side plates with a pull bar and a cam lever. Two sets of pressure pins provide a frictional fit with the barbell when the collar is in its closed position, which is achieved by use of the am lever. The side plates are secured to each other by screws or rivets.
1. A weight retention collar for securing weight plates to a barbell comprising
an outer frame that is shaped to form an interior space sufficient to allow the placement of said barbell therein, said frame having a first side and second side;
a plurality of pressure pins that are substantially cylindrical in shape, each of said pressure pins having a first side and second side, said first side of each of said pressure pins being attached to the interior of said first side of said outer frame and said second side of each of said pressure pins being attached to the interior of said second side of said outer frame;
a pull bar connected to one of said plurality of pressure pins; and
a lever attached to said pull bar;
wherein when said lever is activated to pull on said pull bar, said pressure pins close said outer frame around said barbell.
2. A weight retention collar as defined in claim 1 wherein said interior space of said outer frame is substantially cylindrical in shape.
3. A weight retention collar as defined in claim 1 wherein said lever is a cam lever.
4. A method for securing weights to a barbell comprising
placement of one or more weights on the sleeve of said barbell;
placement of a weight retention collar in its open position around said sleeve of said barbell behind said weight plates, said weight retention collar further comprising
an outer frame that is shaped to form an interior space sufficient to allow the placement of said barbell therein, said frame having a first side and second side;
a plurality of pressure pins, each of said pressure pins having a first side and second side, said first side of each of said pressure pins being attached to the interior of said first side of said outer frame and said second side of each of said pressure pins being attached to the interior of said second side of said outer frame;
a pull bar connected to one of said plurality of pressure pins; and
a lever attached to said pull bar;
moving said weight retention collar to its closed position through the activation of said lever said activation allowing said lever to pull on said pull bar, said pressure pins closing said outer frame around said barbell.
5. A method as defined in claim 4 wherein said collar is used to secure weight plates to a dumbbell.
6. A method as defined in claim 4 wherein said interior space of said outer frame is substantially cylindrical in shape.
7. A method as defined in claim 4 wherein said pressure pins are substantially cylindrical in shape.
8. A method as defined in claim 4 wherein said lever is a cam lever.