CA1105516A - Two-wheeled hand trucks - Google Patents
Two-wheeled hand trucksInfo
- Publication number
- CA1105516A CA1105516A CA357,198A CA357198A CA1105516A CA 1105516 A CA1105516 A CA 1105516A CA 357198 A CA357198 A CA 357198A CA 1105516 A CA1105516 A CA 1105516A
- Authority
- CA
- Canada
- Prior art keywords
- wheels
- frame
- primary frame
- side rails
- stair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Handcart (AREA)
Abstract
IMPROVEMENTS IN TWO-WHEELED HAND TRUCKS
ABSTRACT OF THE DISCLOSURE
A two-wheeled hand truck or dolly structure wherein a primary frame with side rails is mounted on a pair of wheels and a generally forwardly disposed nose part is connected to project forwardly from the primary frame. An axle supports the wheels and axle mounted brackets connect the wheels with the frame. Stair climbers have upper ends releasably clamped to the side rails and lower ends clamped to the brackets.
ABSTRACT OF THE DISCLOSURE
A two-wheeled hand truck or dolly structure wherein a primary frame with side rails is mounted on a pair of wheels and a generally forwardly disposed nose part is connected to project forwardly from the primary frame. An axle supports the wheels and axle mounted brackets connect the wheels with the frame. Stair climbers have upper ends releasably clamped to the side rails and lower ends clamped to the brackets.
Description
1 This invention relates to two-wheeled hand trucks
2 or dollies of the type wherein a primary frame, mounted on
3 a pair of wheels, is adapted in use to assume a generally
4 vertical position and has a generally forwardly disposed
5 nose part connected to project forwardly from the primary ~ frame to receive an object to be carried by the hand truck.
8 Hand trucks of varying design have been proposed 9 and patented. The present improvements are concerned with the stair climbers, which are disclosed as attached to the 11 axle-mounted brackets at their lower ends and to the side 12 rails at their upper ends.
14 An important object of the invention is to pro-vide a very simple, practical, e~onomical and durable 1~ hand truck of improved character which can be effectively 17 utilized to transport a wide variety of products from one 18 place to another.
Figure 1 is a front elevational view of an im-21 proved hand truck constructed in accordance with my in-22 vention;
23 Figure 2 is a side elevational view thereof ~4 taken on the line 2-2 of Figure 1, the chain lines indi-cating an alternative position of the stair climber 86 members;
87 Figure 2A is a side elevational view of the informational strip only;
Figure 2B is a transverse sectional view, taken ~0 on the line 2B-2B of Figure 2;
'$~
1 ¦ igure 3 is a rear elevational view thereof:
2 Figure 4 is a sectional fragmentary elevational 3 view taken on the line 4-4 of Figure 5;
. Figure 5 is a considerably enlarged, sectional : 5 fragmentary top plan view taken on the line 5-5 of Figure 2;
Figure 6 is a considerably enlarged, fragmentary top plan view taken on the line 6-6 of Figure 2;
Figure 7 is an enlarged, fragmentary, transverse 9 sectional view taken on the line 7-7 of Figure l;
Figure 8 is an elevational view of a modified 11 form of strip;
12 Figure 9 is a still further view of a modified 13 form of strip;
14 Figure 10 is a transverse sectional view showing lS the strip of Figure 9 mounted in position;
1~ Figure 11 is a side elevational view illustrating 17 ¦ a modified form of stair climber for the hand truck;
18 Figure 12 is a transverse sectional view taken on 19 the line 12-12 of Figure 11;
20 ¦ Figure 13 is an end elevational view taken on the 21¦ line 13-13 of Figure 11;
22 ¦ Figure 14 is a side elevational view of the wear 23 strip onlyj 24 Figure 15 is a transverse sectional view taken at the line 15-15 of Figure 14;
26 Figure 16 is an end elevational view taken at the 27 line 1~-16 of Figure 14; and 28 Figure 17 is a top plan view taken at the line a~ ¦ 17-17 o i~ure 14.
111~5516 l Referring now more particularly to the accompany-2 ing drawings, and in the first instance to Figures l through 3 7 thereof, the hand truck of the present invention is shown 4 as comprising generally a pair of preferably rubber tired wheels 10, mounted on an axle 11. Brackets 12 have the B usual hubs 12a, for receiving the ends of axle ll, and ex-7 tend forwardly to mount to the lower ends of a primary frame, 8 generally designated 13, which, as shown, comprises an open ~ framework made up of side rail members 14 connected by cross rail members 15. Projecting forwardly from the primary frame ll 13 is an angle-shaped nose piece generally designated 16, 12 having a forwardly extending lip or apron 16' upon which the 13 article to be transported may be supported in the usual l4 manner.
16 As Figure 2 indicates, an alternate hub 12b is 17 also provided on each bracket 12 to accommodate the axle 18 11 when a wheel 10 of larger diameter is employed. In 19 addition to the members described, U-shaped stair climber members, generally designated 17, are utilized and mount 21 to the brackets 12, and to the side rails 14, in a manner 23 which will be more particularly described later.
g4 It is important to understand that carts of this character must ~e constructed of light-weight material such 26 as aluminum, and constructed very economically. Accordingly, 27 extrusions of the configuration particularly shcwn in 28 Figures 5 and 6 are employed as side rails 14. As Figures 5 and 6 indicate, the extruded side rails 14 are generally U-shaped in cross section and include front and rear sides liO5S~
1 14a and 14b respectively, connected by a web part 14c. A
2 bale-shaped handle member 18, which inclines rearwardly as shown particularly in Figure 2, has free ends 18a, which are 4 received in the upper ends of the U-shaped side rails 14, and may be bolted thereto as shown at 19 (Figure 2B).
7 The outboard faces of the web portions 14c of 8 each side rail 14 are provided with T-shaped slots (Figure ~ 6), generally designated 20, which include enlarged head portions 20a and reduced size neck portions 20b, defined 11 by projecting flanges 21 which, like slots 20, extend the 12 full length of the side rails 14. The brackets 12 are 13 provided with key portions 22 of a depth to be recei~ed 14 within the enlarged portions 20a of T-slots 20 and the slots 20 also accommodate semi-rigid strips 23 which ex-16 tend all the way from the upper ends of rails 14 down into 17 abutting engagement with the upper surface of key portions 18 22, the upper end of key 22 being slotted as at 22a to 19 accommodate the lower end of strip 23 and securely affix it in position as shown in Figure 4.
22 In like manner, and as shown particularly in 23 Figure 7, the extruded tubular cross pieces 15 are pro-~4 vided with T-slots 24 on their front and rear faces which similarly comprise enlarged portions 24a and reduced size 26 neck portions 24~, defined by overlying flanges 25. Simi-27 lar semi-rigid strips 26 are accommodated in the portions 28 24a of slots 24 and extend from one end of each cross a0 ¦ rail 15 the ~ther.
1~05516 1 It is to be understood that the strips 23 and 26 2 are plastic strips of about 1/16" in thickness which are 3 designed to bear advertising material, identifying material, 4 or such other informational material as the user of the cart may desire. Preferably, they are colored strips to ~ contrast with the silver metallic color of cross rails 15 7 and side rails 14, and for purposes of convenience, are 8 shown in applicant's drawings as carrying printing desig-9 nated as "advertising slogan" or "identification". The plastic used may be polyvinylchloride or any form of a 11 number of known plastic which is suitable for the purpose.
13 The nose piece, generally designated 16, includes 14 rear facial portions 16a (see Figures 1 and 5) which butt against the side rails 14, as shown particularly in Figure 1~ 5, and inboard flange extensions 16b, which abut fitting 17 strip members 27. Hubs 28 are cast on nose parts 16b and 18 permit bolts and nuts 29 and 30, respectively to rigidly 19 clamp the brackets 12 and nose pieces 16 securely to the side rails 14. The bolts 29 extend through the key por-21 tions 22 of brackets 12 at a point below the strips 23 as 22 shown in Figure 4.
24 At their lower ends the stair climbers 17 are 2~ shown as having a pair of alternate mounting holes 17a 26 and 17b. With the smaller diameter wheels 10 shown, it 27 is the holes 17b which are utilized and releasable ~astener 2~ members such as bolts 17c are employed to sec~re the stair 2~ climbers securely to the brackets 12. If larger diameter wheels are utilized, then the position of stair climbers S~6 1 17 would be adjusted so that it would be the holes 17a 2 which would be used for the attaching bolts 17c and secur-ing the stair climber members 17 in the adjusted position 4 illustrated by the chain lines 17' in Figure 2.
8 Hand trucks of varying design have been proposed 9 and patented. The present improvements are concerned with the stair climbers, which are disclosed as attached to the 11 axle-mounted brackets at their lower ends and to the side 12 rails at their upper ends.
14 An important object of the invention is to pro-vide a very simple, practical, e~onomical and durable 1~ hand truck of improved character which can be effectively 17 utilized to transport a wide variety of products from one 18 place to another.
Figure 1 is a front elevational view of an im-21 proved hand truck constructed in accordance with my in-22 vention;
23 Figure 2 is a side elevational view thereof ~4 taken on the line 2-2 of Figure 1, the chain lines indi-cating an alternative position of the stair climber 86 members;
87 Figure 2A is a side elevational view of the informational strip only;
Figure 2B is a transverse sectional view, taken ~0 on the line 2B-2B of Figure 2;
'$~
1 ¦ igure 3 is a rear elevational view thereof:
2 Figure 4 is a sectional fragmentary elevational 3 view taken on the line 4-4 of Figure 5;
. Figure 5 is a considerably enlarged, sectional : 5 fragmentary top plan view taken on the line 5-5 of Figure 2;
Figure 6 is a considerably enlarged, fragmentary top plan view taken on the line 6-6 of Figure 2;
Figure 7 is an enlarged, fragmentary, transverse 9 sectional view taken on the line 7-7 of Figure l;
Figure 8 is an elevational view of a modified 11 form of strip;
12 Figure 9 is a still further view of a modified 13 form of strip;
14 Figure 10 is a transverse sectional view showing lS the strip of Figure 9 mounted in position;
1~ Figure 11 is a side elevational view illustrating 17 ¦ a modified form of stair climber for the hand truck;
18 Figure 12 is a transverse sectional view taken on 19 the line 12-12 of Figure 11;
20 ¦ Figure 13 is an end elevational view taken on the 21¦ line 13-13 of Figure 11;
22 ¦ Figure 14 is a side elevational view of the wear 23 strip onlyj 24 Figure 15 is a transverse sectional view taken at the line 15-15 of Figure 14;
26 Figure 16 is an end elevational view taken at the 27 line 1~-16 of Figure 14; and 28 Figure 17 is a top plan view taken at the line a~ ¦ 17-17 o i~ure 14.
111~5516 l Referring now more particularly to the accompany-2 ing drawings, and in the first instance to Figures l through 3 7 thereof, the hand truck of the present invention is shown 4 as comprising generally a pair of preferably rubber tired wheels 10, mounted on an axle 11. Brackets 12 have the B usual hubs 12a, for receiving the ends of axle ll, and ex-7 tend forwardly to mount to the lower ends of a primary frame, 8 generally designated 13, which, as shown, comprises an open ~ framework made up of side rail members 14 connected by cross rail members 15. Projecting forwardly from the primary frame ll 13 is an angle-shaped nose piece generally designated 16, 12 having a forwardly extending lip or apron 16' upon which the 13 article to be transported may be supported in the usual l4 manner.
16 As Figure 2 indicates, an alternate hub 12b is 17 also provided on each bracket 12 to accommodate the axle 18 11 when a wheel 10 of larger diameter is employed. In 19 addition to the members described, U-shaped stair climber members, generally designated 17, are utilized and mount 21 to the brackets 12, and to the side rails 14, in a manner 23 which will be more particularly described later.
g4 It is important to understand that carts of this character must ~e constructed of light-weight material such 26 as aluminum, and constructed very economically. Accordingly, 27 extrusions of the configuration particularly shcwn in 28 Figures 5 and 6 are employed as side rails 14. As Figures 5 and 6 indicate, the extruded side rails 14 are generally U-shaped in cross section and include front and rear sides liO5S~
1 14a and 14b respectively, connected by a web part 14c. A
2 bale-shaped handle member 18, which inclines rearwardly as shown particularly in Figure 2, has free ends 18a, which are 4 received in the upper ends of the U-shaped side rails 14, and may be bolted thereto as shown at 19 (Figure 2B).
7 The outboard faces of the web portions 14c of 8 each side rail 14 are provided with T-shaped slots (Figure ~ 6), generally designated 20, which include enlarged head portions 20a and reduced size neck portions 20b, defined 11 by projecting flanges 21 which, like slots 20, extend the 12 full length of the side rails 14. The brackets 12 are 13 provided with key portions 22 of a depth to be recei~ed 14 within the enlarged portions 20a of T-slots 20 and the slots 20 also accommodate semi-rigid strips 23 which ex-16 tend all the way from the upper ends of rails 14 down into 17 abutting engagement with the upper surface of key portions 18 22, the upper end of key 22 being slotted as at 22a to 19 accommodate the lower end of strip 23 and securely affix it in position as shown in Figure 4.
22 In like manner, and as shown particularly in 23 Figure 7, the extruded tubular cross pieces 15 are pro-~4 vided with T-slots 24 on their front and rear faces which similarly comprise enlarged portions 24a and reduced size 26 neck portions 24~, defined by overlying flanges 25. Simi-27 lar semi-rigid strips 26 are accommodated in the portions 28 24a of slots 24 and extend from one end of each cross a0 ¦ rail 15 the ~ther.
1~05516 1 It is to be understood that the strips 23 and 26 2 are plastic strips of about 1/16" in thickness which are 3 designed to bear advertising material, identifying material, 4 or such other informational material as the user of the cart may desire. Preferably, they are colored strips to ~ contrast with the silver metallic color of cross rails 15 7 and side rails 14, and for purposes of convenience, are 8 shown in applicant's drawings as carrying printing desig-9 nated as "advertising slogan" or "identification". The plastic used may be polyvinylchloride or any form of a 11 number of known plastic which is suitable for the purpose.
13 The nose piece, generally designated 16, includes 14 rear facial portions 16a (see Figures 1 and 5) which butt against the side rails 14, as shown particularly in Figure 1~ 5, and inboard flange extensions 16b, which abut fitting 17 strip members 27. Hubs 28 are cast on nose parts 16b and 18 permit bolts and nuts 29 and 30, respectively to rigidly 19 clamp the brackets 12 and nose pieces 16 securely to the side rails 14. The bolts 29 extend through the key por-21 tions 22 of brackets 12 at a point below the strips 23 as 22 shown in Figure 4.
24 At their lower ends the stair climbers 17 are 2~ shown as having a pair of alternate mounting holes 17a 26 and 17b. With the smaller diameter wheels 10 shown, it 27 is the holes 17b which are utilized and releasable ~astener 2~ members such as bolts 17c are employed to sec~re the stair 2~ climbers securely to the brackets 12. If larger diameter wheels are utilized, then the position of stair climbers S~6 1 17 would be adjusted so that it would be the holes 17a 2 which would be used for the attaching bolts 17c and secur-ing the stair climber members 17 in the adjusted position 4 illustrated by the chain lines 17' in Figure 2.
6 At their upper ends the stair climbers 17 are
7 connected with a pair of inner and outer clip members 31 and 32 (Figure 6), respectively, by way of releasable bolts ~ and nuts 33a and 33b, respectively. Each inboard clip 31 includes a U-shaped end 31a, sized to fit over the flanged 11 free outer end of the leg part 14b of one of the side rails 12 14. Similarly, the outboard clips 32 have U-shaped ends 13 32a, configured to fit over the rear flanges 21 on each 14 side rail 14 and bear against the strips 23 as shown in Figure 6. The stair climber member 17, shown in Figure 2, 1~ can be moved to the position shown in chain lines 17', only 17 ¦ of course, if the nuts 33b are backed off sufficiently to 18 permit the clips 31 and 32 to slide upwardly along side 19 rails 14.
21 The plastic strips 26, carried by cross rails 1~, 22 extend the full length of rails 15 and may be provided with 23 bores to receive rivets 34 (Figure 7) which secure them in 24 position. They may, however, also be formed as shown in Figure 8 with elongate slots 35. Further, in an alterna-26 tive form of the invention, an after insertion of narrower 27 strips 26' may be accomplished with slots 3~ similarly 28 ~ccommodating the rivets 34. Preferably, in this embodi-2~ ment, a strong tacky adhesi~e will be used on the back of the strips shown in Figure 9 to secure them in position.
l In Figure 11 a stair climber 17 is shown as 2 having a wear strip, generally designated 36, applied to 3 its rear edge. For the sake of clarity, the wear strip 36 4 was not shown in Figures 2 and 3, however it is of the con-figuration disclosed in Figure 14, wherein it is shown as ~ having a base or backer section 36a with bent-over pairs r of central tabs 37 provided on abbreviated side wall sec-
21 The plastic strips 26, carried by cross rails 1~, 22 extend the full length of rails 15 and may be provided with 23 bores to receive rivets 34 (Figure 7) which secure them in 24 position. They may, however, also be formed as shown in Figure 8 with elongate slots 35. Further, in an alterna-26 tive form of the invention, an after insertion of narrower 27 strips 26' may be accomplished with slots 3~ similarly 28 ~ccommodating the rivets 34. Preferably, in this embodi-2~ ment, a strong tacky adhesi~e will be used on the back of the strips shown in Figure 9 to secure them in position.
l In Figure 11 a stair climber 17 is shown as 2 having a wear strip, generally designated 36, applied to 3 its rear edge. For the sake of clarity, the wear strip 36 4 was not shown in Figures 2 and 3, however it is of the con-figuration disclosed in Figure 14, wherein it is shown as ~ having a base or backer section 36a with bent-over pairs r of central tabs 37 provided on abbreviated side wall sec-
8 tions 38, and bent-over tabs 39 provided at one end of
9 base section 36a, with bent-over tabs 40 and 41 provided at the other. Figures 12 and 13 particularly illustrate 11 the manner in which these tabs are bent over from the 37' 12 position to accommodate to the cross section of the stair 13 climber 17 which is particularly illustrated also in these 14 views.
1~ The operation of carts of this character is well 17 known and need not be particularly described. With the 18 embodiment shown in Figures 1 through 8, the strips 23 and 19 26 are applied during manufacture of the cart to suit the specifications of the particular customer by slipping the 21 strips 23 in the upper ends of side rails 14, prior to bolt-22 ing handle 18 and strips 23 in position, and by slipping 23 strips 24 into cross rails 15 so that the rivet openings 24 therein line up with like openings in the rails 15 prior to riveting the cross rails 15 and strips 24 in position on 26 side rails 14. The strips 23 are provided with openings 27 23' or slots 35 to accommodate bolts 19. The strips 26' 28 can, as indicated, be after-inserted if desired.
~0 The nose piece 16, bracket 12 and side rail 14 1 connection, particularly illustrated in Figure 5, is ex-2 tremely stout and rigid and it is, of course, the configur-3 ation of these keyed, interfitting parts which is respon-4 sible. With the new keyed construction, the shear stresses on the clamping bolts are relieved. Moreover, because the ~ brackets 12 are pieces separate from the nose part 16, the 7 nose part can be die cast rather than sand cast and the 8 nose parts 16 can be easily changed where a different size or configuration is desired. When the user desires to em-ploy a different diameter wheel, the position of stair 11 climbers 17 can be adjusted by simply removing the bolts 17c 12 while, at the same time, backing off nuts 33b. This is not 13 possible in prior art constructions wherein the stair climb-14 ers were mounted on the axle. The application of the wear strips 36 is easily accomplished by inserting the wear strip 1~ member, shown particularly in Figure 14, over the rear edge 17 of each stair climber 17, and then bending over the tabs 18 37 through 41.
20 ¦ It is to be understood that the drawings and 21 descriptive matter are in all cases to be interpreted as 22 merely illustrative of the principles of the invention, 23 rather than as limiting the same in any way, since it is 24 contemplated that various changes may be made in various elements to achieve like results without departing from 26 the spirit of the invention or the scope of the appended 27 claims.
2~
~1
1~ The operation of carts of this character is well 17 known and need not be particularly described. With the 18 embodiment shown in Figures 1 through 8, the strips 23 and 19 26 are applied during manufacture of the cart to suit the specifications of the particular customer by slipping the 21 strips 23 in the upper ends of side rails 14, prior to bolt-22 ing handle 18 and strips 23 in position, and by slipping 23 strips 24 into cross rails 15 so that the rivet openings 24 therein line up with like openings in the rails 15 prior to riveting the cross rails 15 and strips 24 in position on 26 side rails 14. The strips 23 are provided with openings 27 23' or slots 35 to accommodate bolts 19. The strips 26' 28 can, as indicated, be after-inserted if desired.
~0 The nose piece 16, bracket 12 and side rail 14 1 connection, particularly illustrated in Figure 5, is ex-2 tremely stout and rigid and it is, of course, the configur-3 ation of these keyed, interfitting parts which is respon-4 sible. With the new keyed construction, the shear stresses on the clamping bolts are relieved. Moreover, because the ~ brackets 12 are pieces separate from the nose part 16, the 7 nose part can be die cast rather than sand cast and the 8 nose parts 16 can be easily changed where a different size or configuration is desired. When the user desires to em-ploy a different diameter wheel, the position of stair 11 climbers 17 can be adjusted by simply removing the bolts 17c 12 while, at the same time, backing off nuts 33b. This is not 13 possible in prior art constructions wherein the stair climb-14 ers were mounted on the axle. The application of the wear strips 36 is easily accomplished by inserting the wear strip 1~ member, shown particularly in Figure 14, over the rear edge 17 of each stair climber 17, and then bending over the tabs 18 37 through 41.
20 ¦ It is to be understood that the drawings and 21 descriptive matter are in all cases to be interpreted as 22 merely illustrative of the principles of the invention, 23 rather than as limiting the same in any way, since it is 24 contemplated that various changes may be made in various elements to achieve like results without departing from 26 the spirit of the invention or the scope of the appended 27 claims.
2~
~1
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In a two-wheeled hand truck or dolly structure:
a pair of wheels; a primary frame adapted in use to assume a generally vertical position supported by said wheels; a generally forwardly disposed nose part supported by said wheels and connected to project forwardly from the primary frame to receive an object to be carried thereon; said frame at its upper end incorporating a handle portion which can be grasped by the user to propel the truck, along with the product carried by the nose part resting back against the primary frame; said frame comprising an open framework with side rails connected by cross rails;
an axle connecting said wheels; axle mounted brackets con-nected with the nose part to the primary frame side rails;
and stair climbers having upper ends releasably clamped to the side rails and lower ends with alternate openings, one set of which is clamped to the brackets.
a pair of wheels; a primary frame adapted in use to assume a generally vertical position supported by said wheels; a generally forwardly disposed nose part supported by said wheels and connected to project forwardly from the primary frame to receive an object to be carried thereon; said frame at its upper end incorporating a handle portion which can be grasped by the user to propel the truck, along with the product carried by the nose part resting back against the primary frame; said frame comprising an open framework with side rails connected by cross rails;
an axle connecting said wheels; axle mounted brackets con-nected with the nose part to the primary frame side rails;
and stair climbers having upper ends releasably clamped to the side rails and lower ends with alternate openings, one set of which is clamped to the brackets.
2. In a two-wheeled hand truck or dolly structure including: a pair of wheels; a primary frame adapted in use to assume a generally vertical position supported by said wheels; a generally forwardly disposed nose part supported by said wheels and connected to project for-wardly from the primary frame to receive an object to be carried thereon; said frame at its upper end incorporat-ing a handle portion which can be grasped by the user to propel the truck, along with the product carried by the nose part resting back against the primary frame; said frame comprising an open framework with side rails connected by cross rails; an axle connecting said wheels; and stair climbers having upper ends secured to the side rails and lower ends supported by the axle such that their rear sur-faces are substantially peripherally flush with the dia-meter of the wheels; said stair climbers comprising a web part with an outer stair-engaging flange of enlarged width; metallic backer strips provided for the backs of the stair climbers, shaped to the configuration thereof and in facial engagement therewith, and releasable bent over tabs for the strips securing their front and rear ends thereto.
3. The structure as set forth in claim 2 wherein sets of opposed tabs are bent from each side of the backer strip over the flange.
4. The structure as set forth in claim 3 in which the backer strips extend along the intermediate portion of the U-shaped stair climbers and the lower ends of said backer strips have angularly extending parts to conform to the lower leg parts of said stair climbers; sets of tabs being provided at the ends of said angularly extending parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA357,198A CA1105516A (en) | 1975-05-27 | 1980-07-28 | Two-wheeled hand trucks |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/581,212 US3997182A (en) | 1975-05-27 | 1975-05-27 | Two-wheeled hand trucks |
| US581,212 | 1975-05-27 | ||
| CA329,477A CA1088120A (en) | 1975-05-27 | 1979-06-11 | Two-wheeled hand trucks |
| CA357,198A CA1105516A (en) | 1975-05-27 | 1980-07-28 | Two-wheeled hand trucks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1105516A true CA1105516A (en) | 1981-07-21 |
Family
ID=27166285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA357,198A Expired CA1105516A (en) | 1975-05-27 | 1980-07-28 | Two-wheeled hand trucks |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1105516A (en) |
-
1980
- 1980-07-28 CA CA357,198A patent/CA1105516A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |