초록 ▼

A fork lift trolley includes a frame with two L-shaped members, a pair of forks mounted on the members to rise and descend thereon, a hydraulic mechanism fitted to a front of the frame, a pair of closely-spaced pivot wheels formed at a bottom of the hydraulic mechanism, and a steering handle linked

A fork lift trolley includes a frame with two L-shaped members, a pair of forks mounted on the members to rise and descend thereon, a hydraulic mechanism fitted to a front of the frame, a pair of closely-spaced pivot wheels formed at a bottom of the hydraulic mechanism, and a steering handle linked to the pivot wheels. A hoist mechanism is fitted to the frame and connected to the hydraulic mechanism. The hoist mechanism is actuated by a hydraulic pump fitted below the steering handle which is pivotally raised and lowered to actuate the hydraulic pump. The handle has a heart shaped grip at a top thereof which is easily grasped by one hand of an operator, and a pressure-release trigger is mounted in the steering handle and within the grip, whereby the operator can de-actuate the hoist mechanism with the same hand holding the grip.

대표청구항 ▼

1. A fork lift trolley, comprising: a frame with a pair of closely spaced pivot wheels with a union therebetween and attached to a front of the frame via a lateral plate, and a pair of support wheels attached to a rear of the frame; a handle to steer the pivot wheels being pivotal relative in tw

1. A fork lift trolley, comprising: a frame with a pair of closely spaced pivot wheels with a union therebetween and attached to a front of the frame via a lateral plate, and a pair of support wheels attached to a rear of the frame; a handle to steer the pivot wheels being pivotal relative in two planes to the frame and attached to a bracket disposed above the lateral plate, and including a pressure release trigger sited at a top end of the handle; a pair of X-shaped braces slidingly mounted on the frame; a pair of forks respectively mounted on the pair of X-shaped braces; a hoist mechanism mounted to the frame and connecting the frame and the forks; a hydraulic pump with a return device being fitted to the bracket and abutting a bottom of the handle and actuable by at least downward pivoting of the handle; a hydraulic mechanism mounted to the bracket and connected to the union of the pivot wheels, such that the hydraulic mechanism is operable by the hydraulic pump to raise and lower the pair of forks; and a track device slidingly mounted between the frame and the hoist mechanism to guide movement between the hoist mechanism and the frame, whereby the fork lift trolley is easily maneuvered due to the close spacing of the pivot wheels and due to a longitudinal axis of the pivot wheels being close to a longitudinal axis of the hydraulic mechanism, the fork lift trolley is securely operable due to the track device between the hoist mechanism and the frame, and the hydraulic mechanism is easily de-activated by the pressure release trigger being conveniently sited on the handle. 2. The fork lift trolley as claimed in claim 1, wherein the handle further comprises a substantially heart-shaped grip formed at the top end thereof and surrounding the pressure release trigger. 3. The fork lift trolley as claimed in claim 1, wherein the frame comprises two L-shaped members joined by a hollow central column, and the lateral plate is joined to the hollow central column by two side plates, wherein the union of the pivot wheels extends through the lateral plate and connects with a bottom end of the hydraulic mechanism. 4. The fork lift trolley as claimed in claim 3, wherein the hydraulic mechanism comprises a cylinder hydraulically connected with the pump mechanism and having a bottom end connected to the union of the pivot wheels, and a piston slidingly received and extendable from a top of the cylinder and having a distal tip connected to the hoist mechanism, whereby actuation of the pump mechanism causes the piston to rise and fall in the cylinder, thereby raising and lowering the hoist mechanism. 5. The fork lift trolley as claimed in claim 4, wherein the hoist mechanism has a ram slidingly received in the central column, and an arm extending from a top portion of the ram and connected with the distal tip of the piston. 6. The fork lift trolley as claimed in claim 5, wherein the hoist mechanism further comprises two sprockets rotatably connected to the top portion of the ram, each sprocket having a chain reeved therearound, and each chain having a first end secured to the frame and a second end secured to a respective one of the forks. 7. The fork lift trolley as claimed in claim 1, wherein the pump mechanism is further operable by a foot lever connected to the bracket. 8. The fork lift trolley as claimed in claim 1, wherein the return device of the hydraulic pump is a compression spring mounted around the hydraulic pump. 9. The fork lift trolley as claimed in claim 5, wherein the sliding track system comprises two pairs of rollers slidingly sandwiched between opposed inner faces of the ram and the central column. 10. The fork lift trolley as claimed in claim 3, wherein the frame further includes two inclined supports extending between opposed sides of the central column and a base of each L-shaped member.