WO1992017049A1 - Self raising spade - Google Patents
Self raising spade Download PDFInfo
- Publication number
- WO1992017049A1 WO1992017049A1 PCT/GB1991/000518 GB9100518W WO9217049A1 WO 1992017049 A1 WO1992017049 A1 WO 1992017049A1 GB 9100518 W GB9100518 W GB 9100518W WO 9217049 A1 WO9217049 A1 WO 9217049A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- leg
- spade
- fork
- shaft
- sockets
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B1/00—Hand tools
- A01B1/02—Spades; Shovels
- A01B1/028—Spades; Shovels with ground abutment shoes or earth anchors for facilitating lifting
Definitions
- This invention relates to manual implements designed to minimise physical strain on the user. Where reference is made to the term "spade" it is intended that the implement head is
- the essential feature of this invention is a support leg, freely pivoting at opposite rear corners of the implement
- Fig 1 The spade is shown with a detachable
- Fig 2 The triangular support leg detached from the spade. The leg is released by compression of the extreme ends of the side members.
- Fig 3 The first stage of operation.
- Fig 4 The foot is removed from the blade and applies pressure to the support leg base, fixing
- Fig 5 The shaft is gripped in the conventional way, the natural backwards motion of the user causing the blade to rise upon the leg to a height where the load may be moved or unloaded.
- Fig 6 The spade head with the support leg attached.
- Figs 7 & 8 Side and rear elevations of the mounting sockets.
- Fig 9 shows the leg in it's extended
Abstract
The self-raising spade is designed to enable material to be moved from a low level and raised to a working height, without requiring the user to bend or stoop. The action does not require the user to take the weight of the load whilst in a bent posture, therefore reducing the risk of physical injury. The essential feature of this invention is the triangular support leg upon which the load rises to a selected height, this being brought about by the natural backwards motion of the user, the leg returning automatically towards the shaft on discharge of the spade towards the side.
Description
Specification
Self Raising Spade
1. Technical Field; This invention relates to manual implements designed to minimise physical strain on the user. Where reference is made to the term "spade" it is intended that the implement head is
5. exchangeable for a fork or shovel blade, employing the same principle of operation.
Background; Spades are well known implements used in agriculture, industry and in domestic applications, their operation generally involving 10. bending and stooping, placing a strain on the user's spine with a consequent risk of injury.
Essential Technical Features; The essential feature of this invention is a support leg, freely pivoting at opposite rear corners of the implement
15. head and bearing on the ground at a central point, upon which the load is raised, the rotation of the head on discharging the load causing a reaction in the leg whereby the leg returns automatically towards the shaft. The action does not require
20. the user to stoop or take the weight whilst in a bend posture. Versatility of the spade is improved by the ability to simply detach the leg for use as a general purpose implement.
Drawings;
Fig 1: The spade is shown with a detachable
25. support leg pivoting freely in the sockets.
Fig 2: The triangular support leg detached from the spade. The leg is released by compression of the extreme ends of the side members.
Fig 3: The first stage of operation. The blade
30. is driven into the ground and the shaft levered to free the earth, or material to be raised. The support leg falls to the ground.
Fig 4: The foot is removed from the blade and applies pressure to the support leg base, fixing
35. it's position on the ground.
Fig 5: The shaft is gripped in the conventional way, the natural backwards motion of the user causing the blade to rise upon the leg to a height where the load may be moved or unloaded.
40. Fig 6: The spade head with the support leg attached.
Figs 7 & 8: Side and rear elevations of the mounting sockets.
Fig 9: - shows the leg in it's extended
45. (vertical) position. The outer arrows show the direction of rotation of the implement head on discharge to the side (to the left in this example) . The inner arrows show the relative motion of the leg pivoting against the helical
50. face of the socket, returning it towards the shaft.
Abstract: Figures 1 to 9 should accompany the abstract.
Claims
1. A spade or fork incorporating a detachable support 55. leg, pivoting freely at opposite corners of the implement head, and bearing on the ground at a central point, upon which the load is raised, the rotation of the head on discharge of the load exerting a force of reaction on the leg, returning 60. it towards the shaft.
2. A spade or fork as claimed in Claim 1, wherein the leg is detached by compression of the extreme ends of the side members.
3. A spade or fork as claimed in Claims 1 and 2, 65. wherein the leg pivots freely in helically machined sockets, providing a leg-return reaction by virtue of the gradient presented by the helical socket face against the leg on rotation to the side. 70. 4. A spade or fork as claimed in Claims 1,2 and 3, wherein the sockets incorporate upper and lower limit stop faces, restricting the travel of the leg and preventing contact with the shaft.
AMENDED CLAIMS
[received by the International Bureau on 6 April 1992 (06.04.92); original claim 1 cancelled; remaining claims amended (1 page)J
Cancelled
55.
60.
2. A spade or fork wherein the leg is detached by compression of the extreme ends of the side members.
3. A spade or fork as claimed in Claim 2. wherein 65. the leg pivots freely in helically machined sockets. providing a leg-return reaction by virtue of the gradient presented by the helical socket face against the leg on rotation to the side. 70.
4. A spade or fork as claimed in Claims 2 and 3, wherein the sockets incorporate upper and lower limit stop faces, restricting the travel of the leg and preventing contact with the shaft.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8921871A GB2236237B (en) | 1989-09-28 | 1989-09-28 | Self raising spade |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992017049A1 true WO1992017049A1 (en) | 1992-10-15 |
Family
ID=10663731
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1991/000518 WO1992017049A1 (en) | 1989-09-28 | 1991-04-02 | Self raising spade |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB2236237B (en) |
WO (1) | WO1992017049A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2460905A (en) * | 2008-06-18 | 2009-12-23 | Stephen Tyndale-Biscoe | Weeding tool with hinged support leg |
US10980162B1 (en) | 2019-12-30 | 2021-04-20 | Stephen E. Dombrowski | Lifting aid for a long-handled implement |
US11083122B1 (en) | 2019-12-30 | 2021-08-10 | Stephen E. Dombrowski | Lifting aid system for a long-handled implement |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD381778S (en) | 1995-06-22 | 1997-07-29 | Semo Scott R | Combined adjustable scoop and rake/scraper for animal feces removal |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB547775A (en) * | 1941-07-03 | 1942-09-10 | Lionel De Merindol Malan | Improvements in and relating to implements for digging |
GB589347A (en) * | 1944-07-19 | 1947-06-18 | Francis & Barnett Ltd | Improvements in or relating to spring hinges particularly applicable to paper clips and door closing devices |
DE806499C (en) * | 1949-08-26 | 1951-06-14 | Heinrich Faltermayer Sen | Shovel with hinged support |
GB659100A (en) * | 1948-11-19 | 1951-10-17 | Luc Claude Jousse | Improvements in or relating to spades or the like |
US3119596A (en) * | 1962-02-08 | 1964-01-28 | Bancroft F Pratt | Bulk removal tools |
GB1161667A (en) * | 1964-03-26 | 1969-08-20 | Norman Francis Furneaux | Hand Operated Digging Tool |
US4461458A (en) * | 1982-12-09 | 1984-07-24 | Charlemagne Poulin | Low effort digging and lifting tool |
GB2179831A (en) * | 1985-09-04 | 1987-03-18 | John Leonard Kelly | Spade or fork |
US4881332A (en) * | 1988-05-20 | 1989-11-21 | Evertsen Gary L | Shovel lifting aid |
-
1989
- 1989-09-28 GB GB8921871A patent/GB2236237B/en not_active Expired - Fee Related
-
1991
- 1991-04-02 WO PCT/GB1991/000518 patent/WO1992017049A1/en active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB547775A (en) * | 1941-07-03 | 1942-09-10 | Lionel De Merindol Malan | Improvements in and relating to implements for digging |
GB589347A (en) * | 1944-07-19 | 1947-06-18 | Francis & Barnett Ltd | Improvements in or relating to spring hinges particularly applicable to paper clips and door closing devices |
GB659100A (en) * | 1948-11-19 | 1951-10-17 | Luc Claude Jousse | Improvements in or relating to spades or the like |
DE806499C (en) * | 1949-08-26 | 1951-06-14 | Heinrich Faltermayer Sen | Shovel with hinged support |
US3119596A (en) * | 1962-02-08 | 1964-01-28 | Bancroft F Pratt | Bulk removal tools |
GB1161667A (en) * | 1964-03-26 | 1969-08-20 | Norman Francis Furneaux | Hand Operated Digging Tool |
US4461458A (en) * | 1982-12-09 | 1984-07-24 | Charlemagne Poulin | Low effort digging and lifting tool |
GB2179831A (en) * | 1985-09-04 | 1987-03-18 | John Leonard Kelly | Spade or fork |
US4881332A (en) * | 1988-05-20 | 1989-11-21 | Evertsen Gary L | Shovel lifting aid |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2460905A (en) * | 2008-06-18 | 2009-12-23 | Stephen Tyndale-Biscoe | Weeding tool with hinged support leg |
US10980162B1 (en) | 2019-12-30 | 2021-04-20 | Stephen E. Dombrowski | Lifting aid for a long-handled implement |
US11083122B1 (en) | 2019-12-30 | 2021-08-10 | Stephen E. Dombrowski | Lifting aid system for a long-handled implement |
Also Published As
Publication number | Publication date |
---|---|
GB2236237A (en) | 1991-04-03 |
GB8921871D0 (en) | 1989-11-15 |
GB2236237B (en) | 1993-12-01 |
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