US3951236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mountable hoist
Assignee: Individual
•
Filing: 1974-12-20
•
Granted: 1976-04-20
•
Expires: 1994-12-20
Abstract
Abstract A hoist having an outer principal channel post and an inner secondary channel member, longitudinally movable therewithin, the secondary channel member being moved by a winch and cable and being adapted to travel longitudinally beyond the upper end of the principal channel post to allow heavy items to be elevated to a position in abutting relationship to, for example, a ceiling or roof. The hoist can be easily mounted to either the inside or the outside of a conventional pipe scaffolding to provide for the raising and lowering of building materials.
Inventors
- 👤 Raymond H. Schreiber
- 👤 James Lamont Hagan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:15
CPC Classifications
B; B66; B66B; B66B9/00; B66B9/16; B66B9/187; E; E04; E04G; E04G5/00; E04G2005/008; Y; Y10; Y10S; Y10S187/00; Y10S187/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
352 words
A mountable hoist designed to be easily affixed to the outside, and in the alternative, the inside of a scaffolding structure, the hoist comprising: an outer principal channel member, having a longitudinal slot in one side extending the entire length thereof; mounting means fitted exterior of said principal channel member, said mounting means including a channel shaped sleeve having a longitudinal slot in one side extending the entire length thereof and a swivel mount attached to said sleeve opposite said slot, said principal channel slot, and said sleeve slot being aligned to provide an opening into the interior of said principal channel; an inner, secondary channel member of geometry conforming to said outer channel and sized to be movably received within the interior of said outer channel, for free sliding movement in a longitudinal direction relative thereto, said secondary channel also having a longitudinal slot in one side extending from the top at least a portion of the length of one side, said slot containing side of said secondary channel being diametrically opposed to said slot containing side of said principal channel when said principal and said secondary channels are in assembled relationship; carriage means including a base and an L-shaped support arm, said arm having a vertical standard and being removably mounted to said secondary channel by mounting means extending through said longitudinal slot in said principal channel, said carriage thereby moving simultaneously with said secondary channel in a longitudinal direction over the entire length of said principal channel, said secondary channel being further described in that it is generally equal in height to said vertical standard; a pulley means mounted to the principal channel at its upper end; a tension means cooperable with said pulley means and extensible within said principal channel and attached interiorly of said secondary channel at a point below its uppermost end, said tension means being sized to pass through said slot in said secondary channel to permit said secondary channel to project above the uppermost end of said principal channel; drive means for applying tension to said tension means to effect movement of said carriage.
Claim 2
Dependent Claim
352 words
A mountable hoist designed to be easily affixed to the outside, and in the alternative, the inside of a scaffolding structure, the hoist comprising: an outer principal channel member, having a longitudinal slot in one side extending the entire length thereof; mounting means fitted exterior of said principal channel member, said mounting means including a channel shaped sleeve having a longitudinal slot in one side extending the entire length thereof and a swivel mount attached to said sleeve opposite said slot, said principal channel slot, and said sleeve slot being aligned to provide an opening into the interior of said principal channel; an inner, secondary channel member of geometry conforming to said outer channel and sized to be movably received within the interior of said outer channel, for free sliding movement in a longitudinal direction relative thereto, said secondary channel also having a longitudinal slot in one side extending from the top at least a portion of the length of one side, said slot containing side of said secondary channel being diametrically opposed to said slot containing side of said principal channel when said principal and said secondary channels are in assembled relationship; carriage means including a base and an L-shaped support arm, said arm having a vertical standard and being removably mounted to said secondary channel by mounting means extending through said longitudinal slot in said principal channel, said carriage thereby moving simultaneously with said secondary channel in a longitudinal direction over the entire length of said principal channel, said secondary channel being further described in that it is generally equal in height to said vertical standard; a pulley means mounted to the principal channel at its upper end; a tension means cooperable with said pulley means and extensible within said principal channel and attached interiorly of said secondary channel at a point below its uppermost end, said tension means being sized to pass through said slot in said secondary channel to permit said secondary channel to project above the uppermost end of said principal channel; drive means for applying tension to said tension means to effect movement of said carriage.
Claim 3
Dependent Claim
54 words
The hoist of claim 1 wherein said pulley means projects partially into the interior of said principal channel and is positioned to be straddled by opposed sides of said slot of said secondary channel, thereby allowing said secondary channel to project longitudinally past said pulley means and beyond the end of said principal channel.
Claim 4
Dependent Claim
54 words
The hoist of claim 1 wherein said L-shaped support arm is provided with multiple attaching means so that it may be attached to said secondary channel in an inverted as well as an upright position and said base can be attached to one leg of said arm when in either upright or inverted position.
Claim 5
Dependent Claim
51 words
The hoist of claim 2 wherein said pulley means is pivotally attached to support means mounted adjacent the end of said principal channel member, said pivotal attachment allowing said pulley means to twist slightly thereby being self-aligning as it is straddled by opposed sides of the slot of said secondary channel.
Claim 6
Dependent Claim
19 words
The hoist of claim 1 wherein said drive means comprises a winch and said tension means comprises a cable.
References Cited (Backward Citations)
US464900A
Cited
US936911A
Cited
US1235943A
Cited
US1501991A
Cited
US1773030A
Cited
US1981938A
Cited
US2122908A
Cited
US2761574A
Cited
US3213574A
Cited
US3276546A
Cited
US3313376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |