초록

The lever assist device which is attached to the axle of a transport dolly has a foot pedal which is spring biased to a first, vertical inactive position, may be engaged by the foot of a user to reduce the draw force required to rotate the loaded dolly onto its wheels for displacement.

대표청구항 ▼

1. A lever assist device for a transport dolly having handles requiring a specific draw force for a specific load weight, said device comprising: a) a base plate assembly for securement to an axle of the transport dolly;b) a tilt plate securely affixed to a portion of said base plate;c) a lever arm

1. A lever assist device for a transport dolly having handles requiring a specific draw force for a specific load weight, said device comprising: a) a base plate assembly for securement to an axle of the transport dolly;b) a tilt plate securely affixed to a portion of said base plate;c) a lever arm pivotally secured to said base plate assembly and having a first end portion overlapping said tilt plate, and a second end portion with a foot pedal;d) attachment means for securing said base plate assembly to the axle of the transport dolly;e) an axle pin attached to said base plate assembly, said lever arm being pivotally secured to said base plate assembly by means of said axle pin; whereby said foot pedal may be engaged by a foot of the user to pivot said lever arm downwardly into contact with said tilt plate enabling rotation of said tilt plate and the transport dolly attached thereto about the axle of the transport dolly with a significantly reduced level of draw force for the specific load weight. 2. The lever assist device of claim 1 further comprising spring means associated with said axle pin to bias said lever arm to a first non-operative position. 3. The lever assist device of claim 2 wherein said spring means comprises a pair of coil springs wrapped around said axle pin operative between said tilt plate and said lever arm to bias said lever arm into said first non-operative position. 4. The lever assist device of claim 3 wherein said foot pedal comprises said second end of said lever arm bent at a 45° relative to a remaining portion of said lever arm and engagable by the foot of the user to overcome said bias of said coil springs to bring said first end portion overlapping said tilt plate into contact with said tilt plate to allow application of a level of force up to the full weight of the user to assist in rotating the transport dolly about its axle to enable movement of the dolly and its load. 5. The lever assist device of claim 1 further comprising means to attach said base plate to the axle of the transport dolly. 6. The lever assist device of claim 5 wherein said means to attach comprises two pair of aligned holes in said base plate assembly, two holes in the axle, and a pair of cotter pins which extend through said aligned holes on either side of the holes in the axle. 7. The lever assist device of claim 6 wherein the axle comprises a pair of aligned axle shafts upon which wheels may alternatively be mounted.