Gate Elevator
AssigneeVermilion River Tool & Equipment Company, Inc.
InventorDavid L. Sipos
Life of this patent
Estimating the term…
Abstract
A shoulder elevator having a gated pipe opening, is disclosed. The elevator has a ringed body having unclosed sector creating an opening for receiving a pipe within the body ring. Pivotally mounted gates positioned on opposite sides of the unclosed, sector of the ringed body, move in unison to an open and partially close the unclosed sector of the ringed body around the pipe in response to pipe contact with rearward end of the gates. A lever is provided to manually pivot the gates to an open and closed position around a pipe. Lifting lugs or ears are provided to attach the elevator to the lifting links of a hoist.
Claims20
A shoulder elevator comprising:
- (a) a ringed body, said ringed body having an open sector configured to receive a length of pipe wherein one end of said pipe has an outwardly protruding collar around its periphery;
- (b) elongated hangers pivotally mounted to said ringed body, said hangers supported on lifting links;
- (c) opposing first and second curved gates pivotally mounted to said ringed body on opposite sides of said open sector of said ringed body whereby said first and second curved gates may be pivoted to at least partially open and close said open sector of said ringed body;
- and
- (d) a spring biasing said opposing first and second curved gates to at least partially open said open sector of said ringed body.
A shoulder elevator comprising:
- (a) a ringed body, said ringed body having an open sector configured to receive a length of pipe wherein one end of said pipe has an outwardly protruding collar around its periphery;
- (b) elongated hangers pivotally mounted to said ringed body, said hangers supported on lifting links attached to a hoist:
- (c) opposing first and second curved gates pivotally mounted to said ringed body on opposite sides of said open sector of said ringed body, each said curved gate having a forward end extending toward said open sector of said ringed body and a rearward end extending away from said open sector of said ringed body;
- (d) a spring stop pivotally attached to said rearward end of said first curved gate;
- (e) a spring guide rod having first and second ends, said first end of said spring guide rod pivotally attached to said rearward end of said second curved gate, said spring guide rod slidably extending through said spring stop;
- and
- (f) a spring mounted on said spring guide rod, said spring extending between said spring stop and said second end of said spring guide rod, said spring biasing said opposing first and second curved gates to at least partially open said open sector of said ringed body.
A method of lifting a pipe segment comprising the steps of:
- (a) providing a pipe segmentwherein one end of said pipe segment has an outwardly protruding collar around its periphery;
- (b) providing an elevator comprising a ringed body having an open sector configured to receive said pipe segment;
- elongated hangers pivotally mounted to said ringed body;
- opposing first and second curved gates, each of said gates having a forward end and a rearward end, said gates pivotally mounted to said ringed body on opposite sides of said open sector of said ringed body whereby said first and second curved gates may be pivoted to at least partially open and close said open sector of said ringed body;
- and a spring biasing said opposing first and second curved gates to at least partially open said open sector of said ringed body;
- (c) attaching said hangers on lifting links attached to a hoist;
- (d) placing said pipe segment through said open sector of said ringed body;
- (e) pivoting said opposing first and second curved gates thereby at least partially closing said open sector of said ringed body;
- (f) lifting said elevators on said hangers by said attached links;
- (g) sliding said elevator along said pipe segment to a position where said protruding collar of said pipe segment is supported on said opposing curved first and second gates;
- and
- (h) lifting said pipe segment with said elevator.
Dependencies are inferred from the claim text.