Back to results
US 4,022,026 AGranted
Safety shield attachment
OwnerRay Childressinventor
Life of this patent
Estimating the term…
Abstract
A safety shield attachment for protecting machine operators from debris or cave-ins from above has a canopy which is pivotally supported at one end, but normally retained in a fixed position over an operator's station, and a platform pivotally supported at one end, the other end of which can be suspended from the canopy at a fixed level therebelow or allowed to rest upon the ground in a "free-floating" condition.
Claims7
A safety sheild attachment for protecting the operator of a machine, comprising
- a rigid support adapted to be connected to said machine,
- a platform connected by a first horizontal pivot at an inner end thereof to said support and having a free end extending outwardly therefrom,
- said platform being adapted to support a machine operator,
- a control station on said platform disposed inwardly from the free end thereof, said platform providing a support for a machine operator inwardly from the free end thereof,
- a canopy spaced above said platform,
- a second horizontal pivot connecting spaced above the first horizontal pivot and connecting an inner end of said canopy and said support,
- said canopy having an outer end overlying the outer end of said platform,
- said canopy being swingable upwardly and downwardly about said second horizontal pivot,
- hydraulic jack means connected between the free ends of said platform and said canopy,
- controlled means for serving said hydraulic jack means with pressure and return fluid and adjustable means connected between said canopy and said rigid support for selectively limiting the downward swinging of said canopy about said second horizontal pivot.
7 more elements
A safety shield attachment for protecting the operator of a machine, comprising
- a rigid support adapted to be connected to said machine,
- a platform,
- a horizontal pivot connecting one end of said platform to said rigid support, said platform having a free end extending outwardly from said horizontal pivotal connection,
- a control station on said platform,
- said rigid support including a laterally spaced pair of upwardly-extending members rigid therewith,
- a canopy spaced above said platform and having
- an inner end,
- first means connecting the inner end of said canopy at a selected height along the lengths of said upwardly extending members,
- an extensible diagonal brace between said canopy and said upwardly-extending members, including means for limiting the downward pivotal movement of said canopy,
- a pair of hydraulic jacks connecting the free ends of said platform and said canopy, said platform providing a space for accommodating a machine operator inwardly from the jacks, and
- controlled means for serving said jack with pressure and return fluid.
8 more elements
Dependencies are inferred from the claim text.