Land vehicles – Wheeled – Attachment
Patent
1975-11-11
1977-05-17
Peters, Jr., Joseph F.
Land vehicles
Wheeled
Attachment
248354R, B60P 714
Patent
active
040238199
ABSTRACT:
An adjustable length shoring beam for use in shoring a partial load is provided and includes an elongated tubular center section, a first end section telescopingly engaged with one end of the center section for extension and retraction relative thereto and including latch structure operative to releasably latch the first end section in predetermined extended positions relative to the center section, a second end section telescopingly engaged with the other end of the center section for extension and retraction relative thereto and an abutment member mounted within the tubular center section for shifting therealong with spring structure operably connected between the abutment member and the second end section yieldingly biasing the latter toward a position in predetermined spaced relationship from the abutment member. The shoring beam further includes positioning structure operably connected between the center section and the abutment member for selectively shifting the latter along the center section into engagement with the second end section.
REFERENCES:
patent: 969002 (1910-08-01), Teachout
patent: 1073294 (1913-09-01), Sienert
patent: 3090600 (1963-05-01), Smith
patent: 3110506 (1963-11-01), O'Brien
patent: 3822850 (1974-07-01), Elias
patent: 3938872 (1976-02-01), Hagerman
Jacobson Harvey B.
O#Brien Clarence A.
Peters Jr. Joseph F.
Schrecengost R.
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