ABDOMINAL EXERCISER WITH ROTATABLE SEAT AND TANDEM PULLEY FEATURES
An abdominal exerciser has base and back frames pivotally mounted for movement between upright and recumbent positions, and a seat frame with cushion rotatable on the base frame. A low friction journal between the base and seat frames supports a user's weight. The journal is about 30 to 42% the distance from a rear end of the cushion to its front end so the user's coccyx is vertically aligned with the journal. Arms at each side of the base frame have a pair of extensions connected to either the base or seat frame, each with a U-shaped handhold lying in a plane at an acute angle of about 30 to 80 degrees to the horizontal. A pair of single pulleys or a pair of tandem pulleys are mounted near the rear of the base frame and are engaged by sleeve-covered springs for biasing the back frame toward the upright position.
The present invention relates generally to the field of exercise devices, and in particular, to a new and useful abdominal exerciser with a seat and a back supporting structure.
A wide variety of exercise devices and techniques are known for exercising the muscles of the stomach and back. Of these, the most common is the sit-up or crunch which, however is also known to place adverse pressure on the back and neck muscles.
U.S. Pat. No. 7,381,171 and D581,471, which are both incorporated here by reference, disclose an abdominal exerciser co-invented by the inventors of the subject application. While effective for exercising the muscles of the stomach and back, the subject application discloses improvements that have been discovered as a result of use and understanding of the dynamics of the inventors' previous device.
A need thus still remains for further improvements in abdominal exercise devices which enhance the exercising of the stomach and back muscles while avoiding adverse pressure on the back and neck muscles.
SUMMARY OF THE INVENTIONAn object of the invention is to provide an abdominal exerciser that has a base frame, a back frame pivotally mounted near a rear end of the base frame for movement between upright and recumbent positions, at least one back cushion connected to the back frame for supporting a user's back, a seat frame mounted for rotation on the base frame and a seat cushion fixed to the seat frame on which a user sits. A low friction journal bushing with a journal post rotatably mounted therein, is operatively connected between the base and seat frames for supporting the weight of the user. The bushing and post are about 30% to about 42% of the distance from a rear end of the seat cushion to the front end of the seat cushion so that the user's coccyx is substantially vertically aligned with the bushing and post when the user sits on the seat cushion and his or her back is resting against the back cushion. Arms at each side of the base frame have a pair of extensions connected to either the base or seat frame. Each arm has a U-shaped handhold lying in a plane extending at an acute angle of about 30 to about 80 degrees to the horizontal plane. A pair of pulleys is mounted for rotation near a rear end of the base frame and engages springs with resilient sleeves thereover, the springs being connected between the base and back frames for biasing the back frame toward the upright position.
A further object of the invention is to provide an abdominal exercise device that comprises: a base frame for lying in a horizontal plane on the floor, the base frame having a pair of side members and a cross member connected between the side members of the base frame; a back frame having a pair of side members pivotally mounted near respective rear ends of the respective side members of the base frame for movement between a forward upright position and a rearward recumbent position; a plurality of back cushions connected between and spaced along the side members of the back frame; an H-shaped seat frame having front and rear members and a cross member connected between the front and rear members; a seat cushion fixed to the seat frame and resting on the front, rear and cross members of the seat frame, the seat cushion having a front end and a rear end; a low friction journal bushing having a vertically extending bore and being connected to the cross member of one of the base and seat frames; a journal post connected to the cross member of the other of the base and seat frames and received for rotation in the low friction journal bushing so that the seat cushion may rotate with respect to the base frame, a support area of the cross member around the journal post and to which the journal post is connected, being in weight-bearing contact with the low friction journal bushing for supporting the weight of a user sitting on the seat cushion, the location of the low friction journal bushing and the journal post received therein, being from about 30% to about 42% of the distance from the rear end of the seat cushion to the front end of the seat cushion so that when a user is sitting on the seat cushion with the users back against the back cushions, the coccyx of the user is substantially vertically aligned with the low friction journal bushing and journal post received therein; an arm at each side of the base frame, each arm having a pair of extensions connected to one of the base frame and the seat frame, each arm including a U-shaped handhold lying in a plane that extends at an acute angle of about 30 degrees to about 80 degrees to the horizontal plane, with the handholds of the arms on opposite sides of the base frame extending outwardly from each other for increasing available room for a user sitting on the seat cushion, and access to the handholds by the user; a pulley mounted for rotation at each side of the base frame near a rear end of the base frame; a tension spring connected between the base frame and the back frame side members for biasing the back frame toward the forward upright position; and a resilient sleeve covering each spring, each resilient sleeve being engaged with one of the pulleys.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which preferred embodiments of the invention are illustrated.
In the drawings:
Referring now to the drawings, in which like reference numerals are used to refer to the same or similar elements,
An H-shaped seat frame 16 having front and rear members 16a and 16b, has a cross member 16c that is connected, e.g. by welding, between the front and rear members. A padded seat cushion 30 is fixed to the seat frame 16 and resting on the front, rear and cross members of the seat frame. The seat cushion has a front end 30a and a rear end 30b.
A low friction journal bushing 40, shown also in
A support area of the seat frame cross member 16c that is immediately around the journal post 42, is in weight-bearing contact with the upper surface of the upper flange 14b of low friction journal bushing 40, for supporting all of the weight of a user 100 sitting on the seat cushion as shown in
The same weight-bearing function would be achieved in the alternate embodiment of the invention where the bushing 40 is mounted to the cross member 16c of the seat frame 16 and the post 42 is mounted to the cross member 12c of the base frame 12.
An arm 50 is also provided at each side of the base frame 12, each arm having a pair of extensions 50a and 50b that are detachably connected to side tubes 12d and 12e extending from the side members 12a and 12b of base frame 12. As best shown in
Each arm 50 includes a U-shaped handhold 50c best shown in
In this embodiment the arms 50 are fixed to the base frame 12 and the user can hold the arms at the handholds 50c to help rotate the user's waist and thus rotate the seat cushion 30 on the base frame while cycling the back frame 14 between the upright and recumbent positions to target the side muscles of the user's abdomen. In another embodiment of the invention shown in
In order to lock seat frame 16 and its cushion 30 in a centered and non-rotating position shown in
One pulley 60 is mounted for rotation at each side of the base frame 12 near a rear end of the base frame about the bolts 15. A tension spring 80 has an eye 84 at one end engaged onto a spring post 14c extending from the back frame side member 14a, and an eye 85 on its opposite end engaged onto a spring post 12f extending from the base frame side member 12a, for biasing the back frame 14 toward the forward upright position shown in
Another embodiment of the invention is shown in
While specific embodiments of the invention have been shown and described in detail to illustrate the application of the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims
1. An abdominal exercise device (10) comprising:
- a base frame (12) for lying in a horizontal plane on the floor, the base frame having a pair of side members (12a, 12b) and a cross member (12c) connected between the side members of the base frame;
- a back frame (14) having a pair of side members (14a, 14b) pivotally mounted near respective rear ends of the respective side members (12a, 12b) of the base frame for movement between a forward upright position and a rearward recumbent position;
- a plurality of back cushions (20) connected between and spaced along the side members (14a, 14b) of the back frame (14);
- an H-shaped seat frame (16) having front and rear members (16a, 16b) and a cross member (16c) connected between the front and rear members;
- a seat cushion (30) fixed to the seat frame (16) and resting on the front, rear and cross members of the seat frame, the seat cushion having a front end and a rear end;
- a low friction journal bushing (40) having a vertically extending bore and being connected to the cross member (12c, 16c) of one of the base and seat frames (12, 16);
- a journal post (42) connected to the cross member (12c, 16c) of the other of the base and seat frames (12, 16) and received for rotation in the low friction journal bushing (40) so that the seat cushion (30) may rotate with respect to the base frame (12), a support area of the cross member around the journal post and to which the journal post is connected, being in weight-bearing contact with the low friction journal bushing (40) for supporting the weight of a user sitting on the seat cushion, the location of the low friction journal bushing (40) and the journal post (42) received therein, being from about 30% to about 42% of the distance from the rear end of the seat cushion to the front end of the seat cushion so that when a user is sitting on the seat cushion (30) with the users back against the back cushions (20), the coccyx of the user is substantially vertically aligned with the low friction journal bushing (40) and journal post (42) received therein;
- an arm (50) at each side of the base frame, each arm having a pair of extensions (50a, 50b) connected to one of the base frame and the seat frame, each arm including a U-shaped handhold (50c) lying in a plane that extends at an acute angle of about 30 degrees to about 80 degrees to the horizontal plane with the handholds (50c) of the arms (50) on opposite sides of the base frame extending outwardly from each other for increasing available room for a user sitting on the seat cushion, and access to the handholds by the user;
- a pulley mounted for rotation at each side of the base frame near a rear end of the base frame;
- a tension spring connected between the base frame and the back frame side members for biasing the back frame toward the forward upright position; and
- a resilient sleeve covering each spring, each resilient sleeve engaged with one of the pulleys.
2. The device of claim 1, wherein the side members (12a, 12b) of the base frame (12) each include a tubular side extension (12d, 12e), the extensions (50a, 50b) of each arm (50) being detachably attached to the tubular side extension on each respective side of the base frame (12) so that the arms are fixed to the base frame when the seat frame rotates.
3. The device of claim 1, wherein the extensions (50a, 50b) of each arm (50) are detachably attached to ends of the respective front and rear members (16a, 16b) of the seat frame (16) on each respective side of the seat frame so that the arms rotate with the rotation of the seat frame.
4. The device of claim 1, including a pair of tandem pulleys mounted for rotation at each side of the base frame and a tension spring connected between the base frame and the back frame side members each with a resilient sleeve covering each spring, engaged with each pulleys for biasing the back frame toward the forward upright position.
5. The device of claim 1, wherein the handhold (50c) lying in a plane that extends at an acute angle of about 50 degrees to about 70 degrees to the horizontal plane.
6. The device of claim 1, wherein the location of the low friction journal bushing (40) and the journal post (42) received therein, is from about 33% to about 39% of the distance from the rear end of the seat cushion to the front end of the seat cushion.
7. The device of claim 1, wherein the rear member of the seat frame includes a seat frame extension (16d) that extends beyond the seat cushion (30), locking holes in the seat frame extension and in the base frame or in one arm extension, that are aligned when the seat cushion is rotation to a centered position, and a locking pin for insertion into the aligned locking holes for fixing the seat cushion in the center position.
8. The device of claim 1, wherein the rear member of the seat frame includes a seat frame extension (16d) that extends beyond the seat cushion (30), locking holes in the seat frame extension and in the base frame or in one arm extension, that are aligned when the seat cushion is rotation to a centered position, and a locking pin for insertion into the aligned locking holes for fixing the seat cushion in the center position, the locking pin including an upper handle that is larger in at least one dimension than the locking holes, and a shaft that is smaller in diameter than the locking holes so that the shaft can extend into the aligned locking hole, the shaft including an annular groove near the upper handle.
9. The device of claim 1, including an elastic band with at least one hook-and-loop covered strap extending from one edge of the band for engagement of the band onto the pulley and sleeve covered spring on each side of the base and back frames.
10. An abdominal exerciser comprising: a base frame; a back frame pivotally mounted near a rear end of the base frame for movement between upright and recumbent positions; at least one back cushion connected to the back frame for supporting a user's back; a seat frame mounted for rotation on the base frame; a seat cushion fixed to the seat frame on which a user sits; a low friction journal bushing connected the base frame, a journal post connected to the seat frame and rotatable mounted in the bushing for rotation of the seat frame and cushion on the base frame; the low friction bushing supporting the weight of a user sitting on the seat cushion and the journal post being located at about 30% to about 42% of a distance from a rear end of the seat cushion to the front end of the seat cushion so that the coccyx of a user sitting on the seat cushion is substantially vertically aligned, with the bushing and post; an arm connected at each side of the base frame, each arm having a pair of extensions connected to the base frame; each arm having a U-shaped handhold lying in a plane extending at an acute angle of about 30 to about 80 degrees to a horizontal plane on which the base rests, a pair of pulleys mounted for rotation near a rear end of the base frame and on opposite sides of the base frame; a springs with a resilient sleeve thereover engaged to each pulley, the springs being connected between the base and back frames for biasing the back frame toward the upright position.
11. The device of claim 10, wherein side members of the base frame include tubular side extensions, the extensions of each arm being detachably attached to the tubular side extension on each respective side of the base frame so that the arms are fixed to the base frame when the seat frame rotates, the handhold lying in a plane that extends at an acute angle of about 50 degrees to about 70 degrees to the horizontal plane, the location of the low friction journal bushing and the journal post received therein, being from about 33% to about 39% of the distance from the rear end of the seat cushion to the front end of the seat cushion, a rear member of the seat frame including a seat frame extension that extends beyond the seat cushion, locking holes in the seat frame extension and in the base frame or one of the arm extensions, that are aligned when the seat cushion is rotation to a centered position, and a locking pin for insertion into the aligned locking holes for fixing the seat cushion in the center position, the locking pin including an upper handle that is larger in at least one dimension than the locking holes, and a shaft that is smaller in diameter than the locking holes so that the shaft can extend into the aligned locking hole, the shaft including an annular groove near the upper handle.
12. An abdominal exercise device comprising:
- a base frame for lying in a horizontal plane on the floor, the base frame having a pair of side members;
- a back frame having a pair of side members pivotally mounted near respective rear ends of the side members of the base frame for movement between a forward upright position and a rearward recumbent position;
- a plurality of back cushions connected between and spaced along the side members of the back frame;
- a seat cushion mounted to the base frame;
- an arm detachably connected to each side member of the base frame and on opposite sides of the seat cushion;
- a pair of side-by-side tandem pulleys mounted for rotation at each side member of the base frame near a rear end of the base frame;
- a pair of tension springs connected between the base frame and the back frame side members on each side of the base and back frames for biasing the back frame toward the forward upright position; and
- a resilient sleeve covering each spring, each resilient sleeve engaged with one of the pulleys.
13. The device of claim 12, wherein the side members (12a, 12b) of the base frame (12) each include a tubular side extension (12d, 12e), the extensions (50a, 50b) of each arm (50) being detachably attached to the tubular side extension on each respective side of the base frame (12) so that the arms are fixed to the base frame when the seat frame rotates.
14. The device of claim 12, wherein the extensions (50a, 50b) of each arm (50) are detachably attached to ends of the respective front and rear members (16a, 16b) of the seat frame (16) on each respective side of the seat frame so that the arms rotate with the rotation of the seat frame.
15. The device of claim 12, including a pair of tandem pulleys mounted for rotation at each side of the base frame and a tension spring connected between the base frame and the back frame side members each with a resilient sleeve covering each spring, engaged with each pulleys for biasing the back frame toward the forward upright position.
16. The device of claim 12, wherein the handhold (50c) lying in a plane that extends at an acute angle of about 50 degrees to about 70 degrees to the horizontal plane.
17. The device of claim 12, wherein the location of the low friction journal bushing and the journal post received therein, is from about 33% to about 39% of the distance from the rear end of the seat cushion to the front end of the seat cushion.
18. The device of claim 12, wherein the rear member of the seat frame includes a seat frame extension that extends beyond the seat cushion, locking holes in the seat frame extension and in the base frame or in one of the arm extension, that are aligned when the seat cushion is rotation to a centered position, and a locking pin for insertion into the aligned locking holes for fixing the seat cushion in the center position.
19. The device of claim 12, wherein the rear member of the seat frame includes a seat frame extension that extends beyond the seat cushion, locking holes in the seat frame extension and in the base frame or in one of the arm extensions, that are aligned when the seat cushion is rotation to a centered position, and a locking pin for insertion into the aligned locking holes for fixing the seat cushion in the center position, the locking pin including an upper handle that is larger in at least one dimension than the locking holes, and a shaft that is smaller in diameter than the locking holes so that the shaft can extend into the aligned locking hole, the shaft including an annular groove near the upper handle.
20. The device of claim 12, including an elastic band with at least one hook-and-loop covered strap extending from one edge of the band for engagement of the band onto the pulley and sleeve covered spring on each side of the base and back frames.
Type: Application
Filed: Sep 8, 2010
Publication Date: Mar 8, 2012
Inventors: EDWARD I. MISHAN (New York, NY), Steven Mishan (New York, NY)
Application Number: 12/877,321