Patents by Inventor Benlong Sun

Benlong Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20260131839
    Abstract: A folding cart with a seat having a cart frame. The cart frame having frames located at front and rear ends, a bottom folding frame rotatably connected between the two frames, and side folding frames located on two sides, wherein two ends of each side folding frame are rotatably connected to the frames at the front and rear ends respectively, and two ends of the bottom folding frame are rotatably connected to the frames at the front and rear ends respectively. A detachable seat is arranged on the cart frame. When users participate in an outdoor activity with a child, the child can sit on the seat, such that the folding cart can carry both goods and the child, and the users do not need to pay more attention to the child and can better enjoy the outdoor activity.
    Type: Application
    Filed: November 10, 2025
    Publication date: May 14, 2026
    Inventor: Benlong SUN
  • Publication number: 20260116450
    Abstract: A portable and frameless folding cart capable of being folded without increasing the height; the cart includes: four vertical bars divided into front vertical bars and rear vertical bars; bottom sleeves mounted at bottom ends of the vertical bars; a first cross bar and a second cross bar which are mounted between the bottom sleeves; first retaining rings mounted at the bottom ends of the front vertical bars and second retaining rings mounted at the bottom ends of the rear vertical bars; first upright bars arranged rotatably and second upright bars arranged rotatably; hinge sleeves mounted on the second upright bars and hinged to the first upright bars; first rotating rings and second rotating rings mounted on the vertical bars; a first diagonal bar mounted on one of the first rotating rings and a second diagonal bar mounted on one of the second rotating rings.
    Type: Application
    Filed: October 30, 2025
    Publication date: April 30, 2026
    Inventor: Benlong SUN
  • Publication number: 20260116447
    Abstract: An expandable folding cart having four side columns, a top block being fixedly arranged at an upper end of each side column; wheel assemblies detachably mounted at the bottom of the side columns; an external assembly detachably mounted on the side columns; and a table board assembly mounted on the top blocks. In the expandable folding cart of the present disclosure, due to the arrangement of the external assembly, an awning can be externally connected to the side columns of the cart. Moreover, due to arrangement of the expansion assembly and the table board assembly, the loading capacity of the cart is improved, so as to facilitate the operation of workers with the table boards and prevent smaller objects from falling, thereby realizing use of the cart in different scenarios.
    Type: Application
    Filed: October 23, 2025
    Publication date: April 30, 2026
    Inventor: Benlong SUN
  • Publication number: 20260116445
    Abstract: A cart capable of being folded without elevating a cart frame and provided with connecting poles. A cart frame having four vertical poles, vertical folding frames located at front and rear ends and hinged to the vertical poles, a plurality of pairs of bottom folding frames and horizontal folding frames hinged to the vertical poles, and a plurality of connecting poles located on two sides, and adjacent horizontal folding frames and bottom folding frames are hinged to the connecting poles. Fixing blocks are mounted at top ends of the vertical poles and top ends of the connecting poles, movable sliders are arranged on the vertical poles and the connecting poles, and lower ends of outer sides of the horizontal folding frames and the vertical folding frames are hinged to the sliders.
    Type: Application
    Filed: October 31, 2025
    Publication date: April 30, 2026
    Inventor: Benlong SUN
  • Publication number: 20250236327
    Abstract: A cart provided with a brake assembly capable of synchronously braking two casters having a cart frame. Two front casters and two rear casters are symmetrically arranged at the bottom of the cart frame. A brake mechanism is arranged on the two rear casters and having a connecting tube, a pedal mounted on the connecting tube and two brake assemblies mounted at ends of the connecting tube respectively. Two ends of the connecting tube are connected to the two brake assemblies respectively. The pedal drives the connecting tube to rotate, and limit portions of the brake assemblies abut against limit pieces on the rear casters to bake the rear casters. The two rear casters can be braked synchronously, thus improving the braking efficiency of the cart in the moving process.
    Type: Application
    Filed: January 16, 2025
    Publication date: July 24, 2025
    Inventor: Benlong SUN
  • Patent number: 12365377
    Abstract: A novel trolley comprises a foldable frame, a handle mounted behind the frame, and four wheel assemblies mounted at four corners of the frame. The frame comprises a frame body consisting of a front wall assembly, a rear wall assembly and two side wall assemblies, as well as a bottom frame assembly located at the bottom of the frame body. Each side wall assembly comprises two connecting rods. Each connecting rod comprises two long rods, two medium rods and two short rods, wherein lower ends of the two long rods are rotatably connected to form a V-shape that is open upwards, and upper ends of the two long rods are rotatably connected to an upper end of the front wall assembly and an upper end of the rear wall assembly respectively.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: July 22, 2025
    Assignee: ZHEJIANG PRIDE LEISURE PRODUCTS CO., LTD.
    Inventor: Benlong Sun
  • Publication number: 20250083724
    Abstract: A slide-folding handcart with a back door, a frame assembly, wherein the frame assembly has a front bracket, a rear bracket, a chassis and two side brackets; the rear bracket has two rear vertical tubes, two rear fixing bases, a rear horizontal tube, a fence frame and two connecting belts; two ends of the rear horizontal tube are fixed to lower ends of the two rear vertical tubes respectively, two sides of a lower end of the fence frame are riveted to the two ends of the rear horizontal tube respectively, and two sides of an upper end of the fence frame are rotatably connected with upper ends of the rear vertical tubes through the connecting belts respectively.
    Type: Application
    Filed: June 28, 2024
    Publication date: March 13, 2025
    Inventor: Benlong SUN
  • Publication number: 20250083725
    Abstract: A double-layer horizontal folding cart having a cart frame. The cart frame having a front frame, a back frame and a chassis riveted to a lower side of the front frame and a lower side of the back frame, wherein casters are arranged at the bottom of the front frame and the bottom of the back frame, and a hand lever is arranged on the front frame; the chassis having an upper layer and a lower layer, and each layer of the chassis having two bottom frames which are articulated symmetrically; and a baffle frame capable of being turned and opened to be horizontal is arranged on the back frame corresponding to the lower layer of the chassis. The double-layer horizontal folding cart can transport more articles every time, has higher transport efficiency, and can transport long and thin articles exceeding the length of the cart.
    Type: Application
    Filed: September 9, 2024
    Publication date: March 13, 2025
    Inventor: Benlong SUN
  • Publication number: 20250083726
    Abstract: A double-layer folding cart having a cart frame and a hand lever riveted to a front end of the cart frame. The cart frame having four support rods and chassis, casters are arranged at bottoms of the four support rods, the chassis include an upper chassis and a lower chassis, and each comprise a center seat and four bottom rods with one ends riveted to four corners of the center seat respectively, the other ends of the bottom rods of the upper chassis are slidably connected with the support rods, and the other ends of the bottom rods of the lower chassis are riveted to lower ends of the support rods. The double-layer folding cart has two layers of storage planes, thus being able to transport more articles every time, and can be folded to be stored, thus occupying a smaller space.
    Type: Application
    Filed: September 9, 2024
    Publication date: March 13, 2025
    Inventor: Benlong SUN
  • Publication number: 20250058811
    Abstract: A folding cart having a frame and casters mounted at the bottom of the frame. The frame having a plurality of pillars, a plurality of pairs of bottom folding frames hinged to the pillars, and a plurality of pairs of transverse folding frames and longitudinal folding frames hinged between the pillars, such that four sides of the folding cart can be folded. Fixing blocks are mounted at top ends of the pillars, slidable sliders are arranged on the pillars, lower ends of outer sides of the transverse folding frames and the longitudinal folding frames are hinged to the sliders, upper ends of the outer sides of the transverse folding frames and the longitudinal folding frames are hinged to the fixing blocks, and the sliders slide to drive the transverse folding frames and the longitudinal folding frames to be folded or unfolded.
    Type: Application
    Filed: August 14, 2024
    Publication date: February 20, 2025
    Inventor: Benlong SUN
  • Publication number: 20240400121
    Abstract: A cart with a double-center chassis having a chassis, and a frame arranged on the chassis and formed by a front wall, a back wall and two side walls. The chassis has two symmetrical sub-frames, two connecting seats and two pull connecting pieces. The side walls and the connecting seats are slidably connected through the pull connecting pieces. By having a double-center chassis, the problem of a large load at the center of the chassis is solved, the possibility of sinking of the chassis is lowered, and the load-bearing and supporting capacity of the chassis is improved.
    Type: Application
    Filed: May 29, 2024
    Publication date: December 5, 2024
    Inventor: Benlong SUN
  • Publication number: 20240400120
    Abstract: A cart capable of sliding without increasing the height having a cart frame formed by a front wall, a back wall and two symmetric side walls, a bottom frame at the bottom of the cart frame, and four wheels disposed on two sides of the front wall and two sides of the back wall respectively; wherein the front wall comprises two vertical tubes, two upper fixed seats, two lower fixed seats, two sliding seats and a folding member, the upper fixed seats and the lower fixed seats are mounted at upper ends and lower ends of the vertical tubes respectively; the sliding seats are disposed around the vertical tubes and are able to slide upwards and downwards, upper and lower ends of each same side of the folding member are riveted to the corresponding upper fixed seat and the corresponding sliding seat respectively.
    Type: Application
    Filed: May 29, 2024
    Publication date: December 5, 2024
    Inventor: Benlong SUN
  • Patent number: 12128940
    Abstract: A cart capable of being horizontally folded without increasing the height having a frame composed of a front wall, a back wall and two symmetric side walls, a chassis disposed at the bottom of the frame, and four wheel assemblies disposed on two sides of the front wall and two sides of the back wall respectively, wherein the front wall comprises an n-shaped support, a lower horizontal tube and two sliding blocks, the lower horizontal tube is fixed to two symmetric ends of the n-shaped support, the sliding blocks are disposed along two vertical tubes of the n-shaped support and are able to slide upwards and downwards; the back wall is identical in structure with the front wall.
    Type: Grant
    Filed: November 10, 2023
    Date of Patent: October 29, 2024
    Assignee: ZHEJIANG PRIDE LEISURE PRODUCTS CO., LTD.
    Inventor: Benlong Sun
  • Publication number: 20240336290
    Abstract: A cart with sliders having a hand lever, a front frame, a back frame, two symmetrical side frames and a chassis, wherein the hand lever is rotatably connected with the front frame, the front frame and the back frame are identical in structure, each of the side frames having two X-shaped cross tubes and two sliders, the chassis having a bottom tube and two bottom frames, one ends of the two bottom frames are articulated, the other ends of the two bottom frames are riveted to the front frame and the back frame respectively, the bottom tube is arranged below the bottom frames, and two ends of the bottom tube are riveted to an upper articulated joint of the two X-shaped cross tubes of one side frame and an upper articulated joint of the two X-shaped cross tubes of the other side frame respectively.
    Type: Application
    Filed: April 8, 2024
    Publication date: October 10, 2024
    Inventor: Benlong SUN
  • Publication number: 20240317287
    Abstract: A handcart open on two sides having a frame, wherein the frame has a front frame, a rear frame, two symmetrical side frames, a chassis and wheels; the front frame has two vertical pipes, a lower horizontal pipe, a baffle and two connecting belts; a fixing base and a wheel are arranged at the top and bottom of each vertical pipe respectively, and two ends of the lower horizontal pipe are respectively mounted on lower ends of the two vertical pipes; a low end of the baffle is rotatably connected with the low horizontal pipe, and two sides of the baffle are respectively riveted to the two fixing bases through one connecting belt; the rear frame also has a structure consisting of vertical pipes.
    Type: Application
    Filed: March 21, 2024
    Publication date: September 26, 2024
    Inventor: Benlong SUN
  • Publication number: 20240227893
    Abstract: A foldable cart having a rectangular frame composed of a front wall and a back wall which are symmetric with each other, two symmetric side walls, and a bottom frame. Four wheels are disposed at four corners of a bottom surface of the rectangular frame. The front wall has two sliding seats, two vertical tubes, a folding assembly, two upper fixing seats and two lower fixing seats. Each side wall has two X-shaped side assemblies, a middle support tube, and a sliding sleeve slidably disposed around the middle support tube, wherein middle fixing seats are disposed at an upper end and a lower end of the middle support tube respectively, and each X-shaped side assembly is formed by two side cross tubes which are riveted together.
    Type: Application
    Filed: October 24, 2023
    Publication date: July 11, 2024
    Inventor: Benlong SUN
  • Publication number: 20240157992
    Abstract: A cart capable of being horizontally folded without increasing the height having a frame composed of a front wall, a back wall and two symmetric side walls, a chassis disposed at the bottom of the frame, and four wheel assemblies disposed on two sides of the front wall and two sides of the back wall respectively, wherein the front wall comprises an n-shaped support, a lower horizontal tube and two sliding blocks, the lower horizontal tube is fixed to two symmetric ends of the n-shaped support, the sliding blocks are disposed along two vertical tubes of the n-shaped support and are able to slide upwards and downwards; the back wall is identical in structure with the front wall.
    Type: Application
    Filed: November 10, 2023
    Publication date: May 16, 2024
    Inventor: Benlong SUN
  • Patent number: D1050658
    Type: Grant
    Filed: June 25, 2024
    Date of Patent: November 5, 2024
    Inventor: Benlong Sun
  • Patent number: D1091714
    Type: Grant
    Filed: February 7, 2024
    Date of Patent: September 2, 2025
    Inventor: Benlong Sun
  • Patent number: D1096049
    Type: Grant
    Filed: June 25, 2024
    Date of Patent: September 30, 2025
    Inventor: Benlong Sun