Rigid gauge for trailer kingpin assessment

Details Rigid gauge for trailer kingpin assessment Rigid gauge for trailer kingpin assessment

2006-07-11

2006-07-11

Smith, R. Alexander (Department: 2859)

Geometrical instruments

Gauge

Automotive

C033S0010BB, C033S563000

Reexamination Certificate

active

07073272

ABSTRACT:
A gauge (100) for measuring wear of a trailer kingpin (10) provides, for each of the base (20) and shank (30) parts of a kingpin, two contiguous slots (118and120, and114and116, respectively), one slot (118, 114) sized to indicate sufficient wear to warrant scheduling replacement or rebuilding, and the other, more lateral slot (120, 116), sized to indicate failure due to excessive wear. In described embodiments, the two pairs of contiguous slots (118and120, 114and116) are joined in the middle of the gauge (100) by an entrance area (112). A respective kingpin base (20) or shank (30) that does not pass, at its widest point, from the entrance area (112) into the respective slot (118, 114) has not worn to the point of warranting replacement or rebuilding. Embodiments of the kingpin gauge (100) may also have spaced apart open slots (141, 142) for measuring the length and trueness of a kingpin along its vertical axis (50).

REFERENCES:
patent: 1881651 (1932-10-01), Franklin
patent: 2684535 (1954-07-01), Reicherter
patent: 3381385 (1968-05-01), Wilber
patent: D252451 (1979-07-01), Behnke
patent: D273467 (1984-04-01), Martin
patent: 5189847 (1993-03-01), Billingsley
patent: 6085623 (2000-07-01), Lefebvre
patent: D429654 (2000-08-01), Pochurek
The Holland Group, Inc., Holland Service Bulletin XL-SB020 titled “Kingpin Maintenance and Replacement Recommendations”, dated Jul. 8, 2004, copyrighted Nov. 2002, 3 pages.
The Holland Group, Inc., Holland Service Bulletin, “Kingpin Maintenance and Replacement Recommendations”, Rev. Jul. 8, 1994, © Jan. 2000, 2 pages.
American Kingpin Specialists, Inc., Kingpin Specialists brochure/flyer, “Why replace when you can repair and save ?” (Note: see paragraph 12 of IDS Tramsmittal.) date unknown.

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