WEIGHTLIFTING DEVICE

• US 20080188362A1
• Filed: 04/09/2008
• Published: 08/07/2008
• Est. Priority Date: 12/19/2006
• Status: Abandoned Application

• Current Assignee: James Chen
• Original Assignee: James Chen
• Inventors: Chen, James
• Application Number:
  US12/100,255
• Publication Number:
  US 20080188362A1
• Time in Patent Office: Days
• US Class Current: 482/107
• CPC Class Codes: A63B 21/00065 by increasing or reducing the number of resistance units
• CPC Class Codes: A63B 21/063 Weight selecting means
• CPC Class Codes: A63B 21/075 with variable weights , e.g. weight systems with weight selecting means for bar-bells or dumb-bells

Abstract

A weightlifting device includes a handle member, an elongated adjustable member, a set of weight plates, and an elongated limiting member. The handle member has a tubular end portion. The adjustable member extends into the end portion of the handle member and is movable axially relative to the handle member. Each of the weight plates is sleeved around the adjustable member. The limiting member extends through the weight plates to thereby prevent rotation of the weight plates relative to each other.

Claims

1. A weightlifting device, comprising:

an exercising weight including

a handle member having a tubular end portion,

an elongated adjustable member extending into said end portion of said handle member, and movable axially relative to said handle member,

a set of weight plates sleeved around said adjustable member, and

an elongated limiting member extending through said weight plates to thereby prevent rotation of said weight plates relative to each other.

2. The weightlifting device as claimed in claim 1, further comprising a restricting unit including a first restricting member provided on said adjustable member, and a second restricting member provided on said end portion of said handle member,

said adjustable member being rotatable relative to said handle member between a first angular position, where said first and second restricting members engage each other, thereby arresting axial movement of said adjustable member relative to said handle member, and a second angular position, where said first and second restricting members are disengaged from each other, thereby permitting axial movement of said adjustable member relative to said handle member.

3. The weight lifting device as claimed in claim 2, wherein each of said weight plates is formed with a first through-hole that has a non-circular shape, and said adjustable member has a circular cross-section,

said limiting member being sleeved on said adjustable member, extending through said first through-holes in said weight plates, and having an inner surface that has a circular cross-section corresponding to the cross-section of said adjustable member, thereby permitting rotation of said adjustable member between the first and second angular positions, and an outer surface that has a non-circular cross-section corresponding to the shape of said first through-holes in said weight plates, thereby preventing rotation of said weight plates relative to each other.

4. The weightlifting device as claimed in claim 3, wherein said limiting member further extends into said end portion of the said handle member, said end portion of said handle member having a non-circular cross-section that corresponds to the cross-section of said outer surface of said limiting member, thereby preventing rotation of said limiting member relative to said handle member.

5. The weightlifting device as claimed in claim 3, wherein said first restricting member includes a plurality of spaced apart engaging grooves that are formed in and that are disposed along the length of said adjustable member,

said adjustable member being further formed with a guiding groove that extends along the length thereof and that is in spatial communication with said engaging grooves,

said limiting member being formed with an elongated slot that extends from said inner surface to said outer surface thereof, and that is registered with said engaging grooves when said adjustable member is disposed at the first angular position and said guiding groove when said adjustable member is disposed at the second angular position,

said second restricting member including an engaging protrusion that extends from said end portion of said handle member through said elongated slot in said limiting member,

said engaging protrusion being disposed in a selected one of said engaging grooves when said adjustable member is disposed at the first angular position,

said engaging protrusion being disposed in said guiding groove when said adjustable member is disposed at the second angular position.

6. The weightlifting device as claimed in claim 3, wherein said limiting member is formed with an elongated hole that extends from said inner surface to said outer surface thereof, said weightlifting device further comprising a retaining unit for retaining said weight plates on said adjustable member, said retaining unit including

a secured member that extends through said elongated hole in said limiting member, and that is secured to said adjustable member so as to be co-movable with said adjustable member between the first and second angular positions, and

a movable member that is coupled movably to said secured member, and that is movable relative to said secured member between an engaging position, where said movable member engages an outermost one of said weight plates, and a second position, where said movable member is disengaged from said outermost one of said weight plates.

7. The weightlifting device as claimed in claim 6, wherein said movable member includes an engaging piece sleeved slidably on said secured member, and said secured member has a free end provided with an abutting piece, said retaining unit further including a biasing member for biasing said movable member to the engaging position, said biasing member having opposite ends that respectively abut against said abutting piece of said secured member and said engaging piece of said movable member.

8. The weightlifting device as claimed in claim 6, wherein each of said weight plates is further formed with a second through-hole that is in spatial communication with said first through-hole in a respective one of said weight plates and that permits said movable member of said retaining unit to pass therethrough when said adjustable member is moved axially relative to said handle member.

9. The weightlifting device as claimed in claim 8, wherein each of said weight plates is formed with a third through-hole that is in spatial communication with the second through-hole and that is defined by a hole-defining wall,

said engaging piece of said movable member including an engaging body, and an engaging arm that extends from said engaging body, that has a hook shape, and that engages said hole-defining wall of said outermost one of said weight plates when said movable member is disposed at the engaging position.