The invention relates to handcarts and more particularly to an inclined handcart having a mechanism for adjusting an inclined angle of a front limit board on a load-carrying platform in the direction of the length.
There is a conventional handcart having a mechanism for adjusting an inclined angle of a limit board on a load-carrying platform in the direction of the length. However, the mechanism is complicated and prone to malfunction.
Thus, the need for improvement still exists.
It is therefore one object of the invention to provide an inclined handcart comprising a frame including two hook-shaped rearward inclined members at two sides respectively; two wheel mounts secured to bottoms of two front corners of the frame respectively; two rear wheels rotatably secured to two rear ends of the rearward inclined members respectively; two front casters rotatably secured to the wheel mounts respectively; a plurality of links interconnecting the rearward inclined members; two plate members mounted on the rearward inclined members respectively, each plate member having a shoulder extending inward; and a first limit board extending from the rear ends of the rearward inclined members.
The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings.
Referring to
A frame 1 includes two sets of two rearward inclined members 10 at two sides respectively, a plurality of links 11 interconnecting the inner rearward inclined members 10 at two sides, a rod 26 interconnecting intermediate portions of the rearward inclined members 10 at either side, an inner end of the rod 26 put on the intermediate one of the links 11 and secured thereto by driving a bolt 27 through the rod 26 and the link 11 to secure to a nut 28, a fastener 29 for securing an end of the rod 26 to the rearward inclined member 10, two wheel mounts 12 at two front corners of the frame 1 respectively, two casters 13 rotatably secured to the wheel mounts 12 respectively, two plate members 14 each mounted on the rearward inclined member 10 of the same side by means of screws 142, the plate member 14 having a shoulder 141 on an inner side, an intermediate load-carrying platform 15 placed on and supported by the shoulders 141 and the intermediate link 11, two axles 16 each driving through a rear bent end of the outer rearward inclined member 10 of either side, a wheel 17, a rear bent end of the inner rearward inclined member 10 of the same side so that the wheel 17 may wheel on the ground, two columns 18 each fastened between rear portions of the rearward inclined members 10 of the same set in front of the wheel 17 by means of a screw 181 and a bolt 182, a rear bar 19 interconnecting the columns 18, two arc rods 21 each disposed on a rear surface of the column 18, two back plates 22 each threadedly secured to the column 18, each back plate 22 having a shoulder 221 on an inner side, the shoulder 221 having a lower end attached to the shoulder 141 of the same side, and a back board 23 mounted on the shoulders 221.
A limit mechanism 4 is mounted at a front portion of the handcart and includes a limit structure 40, two parallel columns 41 on a front portion, an upper member 43 interconnecting upper ends of the columns 41, a lower member 45 interconnecting lower ends of the columns 41, the lower member 45 having two ends placed on the plate members 14 respectively, a large board 30 is mounted on the columns 41, two parallel inclined brackets 42 having upper ends attached to a pivot bar 46 having two ends pivotably secured to intermediate portions of the columns 41 respectively, and two lower ends attached to a lower bar 47 having two ends placed on the plate members 14 respectively, an interconnecting bar 48 having a first end attached to a center of the lower member 45 and a second end formed with an elongated, curved engagement member 49 complimentarily engaged with the lower bar 47, two screws 492 driven through two holes 491 of the engagement member 49 to fasten the engagement member 49 and the lower bar 47 together, two spring biased sliding rods 44 each mounted at a lower end of the column 41, the sliding rod 44 including a shaft 442 disposed through an inner side hole 415 and an outer side hole 414 of the column 41, an end of the shaft 442 being in sliding contact with the inner rearward inclined member 10, a positioning pin 443 driven through the shaft 442, a spring 441 put on the shaft 442 and biased between the positioning pin 443 and an inner surface of the inner side hole 415 of the column 41, and a lock pin 444 driven through an outer end of the shaft 442 and locked in a lock groove 413 of the outer side hole 414 to lock the sliding rod 44. At this position, the columns 41 may move lengthwise. In response to disengaging the lock pin 444 from the lock groove 413, the energized spring 441 expands to move the free shaft 442 outward relative to the inner side hole 415 and the outer side hole 414 until the positioning pin 443 is stopped by the inner surface of the column 41. Thus, the lower member 45 and the lower bar 47 together clamp the rearward inclined members 10.
A seat 51 has a U-shaped longitudinal section and includes two opposite oval slots 511 through front portions of two sides respectively. The seat 5 has a rear portion pivotably provided on a first link member 112 and a second link member 111 is moveably disposed through the oval slots 511. Both the first link member 112 and the second link member 111 interconnect the inner rearward inclined members 10 at two sides. A sleeve 52 is disposed through a bottom of the seat 11. A handle 50 is moveably disposed through the sleeve 52. The sleeve 52 includes a 90-degree bent groove 521 at a rear end or a front end. The handle 50 includes a limit element 53 (e.g., a pin) provided at an end of the groove 521 when the handle 50 is locked, i.e., preventing the handle 53 from being pulled. The handle 50 has a T-shaped head 54. A person may rotate the handle 50 until the limit element 53 is free to move lengthwise, i.e., the handle 50 unlocked. Then the person may pull the handle 50 out of the sleeve 52 in a pulling operation. The handle 50 together with the seat 11 can be pivoted upward after being sufficiently pulled. To the contrary, the person may push the handle 50 into the sleeve 52 until the head 54 is stopped by the sleeve 52 in a non-use position. The seat 51 further comprises two top protrusions 56 adjacent to each oval slot 511. A tension spring 57 has two ends fastened at the protrusions 56 respectively. The second link member 111 is supported by the tension spring 57. Thus, after the handle 50 has been downward pivoted to a horizontal position, the handle 50 is supported by the tension spring 57 without being in contact with the ground.
An elongated 90-degree bent member 60 is secured to each plate member 14 by means of screws 142. The seat 51 is pivotably supported by the second link member 111.
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While the invention has been described in terms of preferred embodiments, those skilled in the art will recognize that the invention can be practiced with modifications within the spirit and scope of the appended claims.
Number | Name | Date | Kind |
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2945699 | Berlye | Jul 1960 | A |
20200307665 | Su | Oct 2020 | A1 |
20210284221 | Perez | Sep 2021 | A1 |
Number | Date | Country | |
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20200361507 A1 | Nov 2020 | US |