Weightlifting device

• US 7,485,077 B2
• Filed: 12/19/2006
• Issued: 02/03/2009
• Est. Priority Date: 12/19/2006
• Status: Expired due to Fees

• Current Assignee: James Chen
• Original Assignee: James Chen
• Inventors: Chen, James
• Primary Examiner(s): Thanh; Loan H
• Assistant Examiner(s): Lewin; Allana
• Application Number:
  US11/642,367
• Publication Number:
  US 20080146420A1
• Time in Patent Office: 777 Days
• Field of Search: 482 93- 95, 482/97, 482/98, 482/99, 482/106, 482/107, 482/108, 482/109, 482/908
• US Class Current: 482/108
• CPC Class Codes: A63B 21/00065 by increasing or reducing the number of resistance units
• CPC Class Codes: A63B 21/0728 with means for fixing weights on bars, i.e. fixing olympic discs or bumper plates on bar-bells or dumb-bells
• 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 adjustable member, a set of weight plates, and a restricting unit. 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. The weight plates are attached removably to the adjustable member. The restricting unit is operable so as to arrest and permit axial movement of the adjustable member relative to the handle member.

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 attached removably to said adjustable member, and

a restricting unit including a first restricting member provided on one of said adjustable member and said end portion of said handle member, and a second restricting member provided on the other of said adjustable member and said end portion of said handle member;

wherein said adjustable member is 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.

2. The weightlifting device as claimed in claim 1, further comprising a retaining unit for retaining said weight plates on said adjustable member, said retaining unit including a secured member that is coupled to said adjustable member, and a movable member that is coupled movably to said secured member, said movable member being movable relative to said secured member between an engaging position, where said movable member engages one of said weight plates when said weight plates are attached to said adjustable member, and a second position, where said movable member is disengaged from said one of said weight plates.

3. The weightlifting device as claimed in claim 2, wherein said retaining unit further includes a biasing member for biasing said movable member to the engaging position.

4. The weightlifting device as claimed in claim 3, wherein said movable member of said retaining unit is hollow, and has an inner wall that is provided with an annular shoulder, said secured member of said retaining unit extending into said movable member and being provided with an annular shoulder, said biasing member of said retaining unit being sleeved on said secured member, being disposed in said movable member, and having opposite ends that abut respectively against said annular shoulder of said secured member and said annular shoulder of said movable member.

5. The weightlifting device as claimed in claim 2, wherein said movable member of said retaining unit is hollow, and has an inner wall that is formed with an inner thread, said secured member of said retaining unit being formed with an outer thread that threadedly engages said inner thread of said movable member when said movable member is disposed at the engaging position to thereby retain said movable member at the engaging position.

6. The weightlifting device as claimed in claim 2, wherein each of said weight plates has a periphery that is formed with a notch, said movable member of said retaining unit extending into said notch in said periphery of one of said weight plates when said movable member engages said one of said weight plates.

7. The weightlifting device as claimed in claim 2, wherein each of said weight plates is formed with a first through-hole for extension of said adjustable member therethrough to thereby attach said weight plates to said adjustable member.

8. The weightlifting device as claimed in claim 7, 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 said weight plate, and that permits said retaining unit to pass therethrough when said weight plates are attached to said adjustable member.

9. The weightlifting device as claimed in claim 1, wherein said first restricting member includes a plurality of spaced apart engaging grooves, said second restricting member including an engaging protrusion that extends into a selected one of said engaging grooves when said adjustable member is disposed at the first angular position, and that moves out of said selected one of said engaging groove when said adjustable member is disposed at the second angular position.

10. The weightlifting device as claimed in claim 1, wherein said adjustable member has a circular cross section, each of said weight plates being formed with a latching groove and a latching protrusion, said latching protrusion of each of said weight plates extending into said latching groove of an adjacent one of said weight plates when said weight plates are attached to said adjustable member, thereby preventing rotation of said weight plates relative to each other.

11. The weightlifting device as claimed in claim 10, wherein said end portion of said handle member has an end face that is formed with a recess, said latching protrusion of one of said weight plates extending into said recess in said end face of said end portion of said handle member when said weight plates are attached to said adjustable member, thereby preventing rotation of said weight plates relative to said handle member.

12. The weightlifting device as claimed in claim 2, wherein said end portion of said handle member has an end face that is formed with a recess, said secured member of said retaining unit being received in said recess when none of said weight plates is attached to said adjustable member and when said adjustable member is retracted into said end portion of said handle member.

13. The weightlifting device as claimed in claim 1, further comprising a rack unit for supporting said exercising weight thereon.

14. The weightlifting device as claimed in claim 13, wherein each of said weight plates is formed with a locking groove, said rack unit being provided with a locking projection that engages releasably said locking groove in one of said weight plates when said rack unit supports said weight plates thereon.

15. The weightlifting device as claimed in claim 13, wherein each of said weight plates is formed with a slot, said rack unit being provided with a plurality of projections, each of which extends into said slot in a respective one of said weight plates when said rack unit supports said weight plates thereon.

16. The weightlifting device as claimed in claim 1, wherein said end portion of said handle member is formed with a window, said adjustable member being marked with a plurality of gradations, one of which is registered with said window in said end portion of said handle member for indicating a total weight of said weight plates when said weight plates are attached to said adjustable member.