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US 4,988,115 AGranted
Undercarriages
OwnerCharles W. Steinkeinventor
Life of this patent
Estimating the term…
Abstract
An undercarriage for pivotable supporting the front end of a trailer with the undercarriage including a set of bolsters that provide a pivoting and rockable connection between a box on the trailer and the front undercarriage to reduce stress on the box with the undercarriage including detachable lift members to permit the user to raise the rear wheels of the undercarriage to permit one to back the trailer like a conventional trailer.
Claims11
A trailer for towing by a vehicle comprising:
- a rear wheeled undercarriage for supporting a rear of the trailer;
- a front wheeled undercarriage for pivotably and rockably supporting a box on the trailer, said front undercarriage including a platform bolster, said platform bolster pivotally connected to the box on the trailer, a set of front wheels on said front undercarriage, a set of rear wheels on said front undercarriage, said front wheels having a front bolster extending therebetween to vertically support said platform bolster, said rear wheels having a rear bolster extending therebetween to vertically support said platform bolster, and tie rods connected to said front wheels to permit a user to turn the front wheels of said front undercarriage independent of the rear wheels of said front undercarriage so that the front undercarriage provides steerable pivotal support to the box on the trailer to thereby minimize the stress on the box induced by the undercarriage passing over uneven terrain;
- and
- said platform bolster includes a recess and said rear bolster includes a member attached to said rear bolster and positioned in said recess to prevent lateral displacement of said platform bolster with respect to said rear bolster.
1 more element
A trailer for towing by a vehicle comprising:
- a rear wheeled undercarriage for supporting the rear of the trailer;
- a front wheeled undercarriage for pivotable and rockable supporting a box on the trailer, said front undercarriage including a platform bolster, said platform bolster pivotally connected to the box on the trailer, a set of front wheels on said front undercarriage, a set of rear wheels on said front undercarriage, said front wheels having a front bolster extending therebetween to vertically support said platform bolster, said rear wheels having a rear bolster extending therebetween to vertically support said platform bolster, and tie rods connected to said front wheels to permit a user to turn the front wheels of said front undercarriage independent of the rear wheels of said front undercarriage so that said front undercarriage provides steerable pivotal support to the box on the trailer to thereby minimize the stress on the box induced by the undercarriage passing over uneven terrain;
- and
- a single loose fitting pivot pin connecting said box to said platform bolster to provide a pivotable rockable connection between the box and said platform bolster wherein said pivot pin can be repositioned as said pivot pin wears.
1 more element
Dependencies are inferred from the claim text.