Patent US3863237A successfully refreshed from Google Patents.
US3863237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lake raking apparatus
Assignee: Individual
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Filing: 1973-12-10
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Granted: 1975-01-28
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Expires: 1993-12-10
Abstract
Abstract A hand operated apparatus for removing stones, weeds, debris and the like from the bottom of ponds and lakes. The apparatus comprises a rigid foraminious box-like structure having one open side and a handle attached to one edge of the open side and a rigid cutting edge attached to the edge of the open side opposite the handle.
Inventors
- 👤 Norman N Doerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:43
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1609; A; A01; A01K; A01K63/00; A01K63/10; B; B01; B01D; B01D21/00; B01D21/18; B01D21/22; E02; E02F; E02F3/00; E02F3/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
A lake rake apparatus for removing debris and weeds from the bottom of lakes and the like comprising: a rigid, perforated, foraminious receptacle suitable for retaining debris and weeds from said lake bottom, said receptacle having one open side; a handle attached at one point to said receptacle, said handle being attached to one edge of said receptacle at an angle of about 150*-180* ; an elongated rigid cutting edge attached to an edge of said receptacle opposite said handle said cutting edge being adapted for movement along said like bottom; a brace having one end attached to said handle and the other end attached to the same side of said receptacle as said rigid cutting edge; and at least one brace having one end attached to said handle and the other end attached to said container on the same side as said handle, said braces serving to keep said handle in a fixed angular configuration with respect to said receptacle; whereby when said rake is moved along said lake bottom, water and sand will pass through said foramina but weeds, stones and other debris will be retained within the receptacle.
Claim 2
Dependent Claim
191 words
A lake rake apparatus for removing debris and weeds from the bottom of lakes and the like comprising: a rigid, perforated, foraminious receptacle suitable for retaining debris and weeds from said lake bottom, said receptacle having one open side; a handle attached at one point to said receptacle, said handle being attached to one edge of said receptacle at an angle of about 150*-180* ; an elongated rigid cutting edge attached to an edge of said receptacle opposite said handle said cutting edge being adapted for movement along said like bottom; a brace having one end attached to said handle and the other end attached to the same side of said receptacle as said rigid cutting edge; and at least one brace having one end attached to said handle and the other end attached to said container on the same side as said handle, said braces serving to keep said handle in a fixed angular configuration with respect to said receptacle; whereby when said rake is moved along said lake bottom, water and sand will pass through said foramina but weeds, stones and other debris will be retained within the receptacle.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1, where said receptacle is made of expanded metal.
Claim 4
Dependent Claim
31 words
The apparatus of claim 1, where said foramina have a largest dimension of about 1/2 to 2 inches and represent at least 70 percent of the surface area of said receptacle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |