US5107935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stake setting accessory for jack hammer
Assignee: Individual
•
Filing: 1991-08-12
•
Granted: 1992-04-28
•
Expires: 2011-08-12
Abstract
Abstract An accessory for a jack hammer that includes clamping means for gripping the upper end of the stake so that the stake can be controllably driven into the ground by the user. The accessory includes a stake receiver that has a channel into which the end portion of the stake is inserted and further includes a jaw and clamping means for forceably retaining the jaw against the inserted stake. The channel includes guide ways that permit it to be used interchangeably with the more common sizes and shapes of stakes.
Inventors
- 👤 L. Robert McBride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:27
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/26; B; B25; B25D; B25D17/00; B25D17/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
An accessory for a jack hammer comprising: a stake receiver having superimposed fixed guide ways front to back forming an axial channel, a cross-section of said channel having first and second sets of substantially orthogonal walls, said first and second sets being mutually spaced with a wall from each set being mutually parallel, a curved indentation disposed between said second set of walls, and a notched disposed within said indentation; attachment means for attaching the accessory to said jack hammer; a jaw attached to said stake receiver and movable from an open position to a closed position in which said jaw contacts an inserted stake; and clamping means for holding the stake between the jaw and the channel.
Claim 2
Dependent Claim
118 words
An accessory for a jack hammer comprising: a stake receiver having superimposed fixed guide ways front to back forming an axial channel, a cross-section of said channel having first and second sets of substantially orthogonal walls, said first and second sets being mutually spaced with a wall from each set being mutually parallel, a curved indentation disposed between said second set of walls, and a notched disposed within said indentation; attachment means for attaching the accessory to said jack hammer; a jaw attached to said stake receiver and movable from an open position to a closed position in which said jaw contacts an inserted stake; and clamping means for holding the stake between the jaw and the channel.
Claim 3
Dependent Claim
22 words
The accessory of claim 1 wherein said clamping means further comprises over-center locking means for locking said jaw in the closed position.
Claim 4
Dependent Claim
18 words
The accessory of claim 1 wherein said clamping means further comprises pneumatic ram means for moving said jaw.
Claim 5
Dependent Claim
18 words
The accessory of claim 1 wherein said clamping means further comprises hydraulic ram means for moving said jaw.
Claim 6
Dependent Claim
17 words
The accessory of claim 1 wherein said clamping means further comprises solenoid means for moving said jaw.
Claim 7
Dependent Claim
26 words
The accessory of claim 1 wherein said attachment means comprises a shank sized and dimensioned to be received by a reciprocating member of said jack hammer.
Claim 8
Dependent Claim
107 words
An improved jack hammer in which the improvement comprises: a stake receiver having superimposed fixed guide ways for receiving stakes having one of essentially rectangular, round and T-shaped cross-sections, said guide ways front to back forming an axial channel, a cross-section of said channel having first and second sets of substantially orthogonal walls, said first and second sets being mutually spaced with a wall from each set being mutually parallel, a curved indentation disposed between said second set of walls, and a notch disposed within said indentation; means for securing the stake receiver to the jack hammer; and means for securing the stakes within the stake receiver.
Claim 9
Dependent Claim
107 words
An improved jack hammer in which the improvement comprises: a stake receiver having superimposed fixed guide ways for receiving stakes having one of essentially rectangular, round and T-shaped cross-sections, said guide ways front to back forming an axial channel, a cross-section of said channel having first and second sets of substantially orthogonal walls, said first and second sets being mutually spaced with a wall from each set being mutually parallel, a curved indentation disposed between said second set of walls, and a notch disposed within said indentation; means for securing the stake receiver to the jack hammer; and means for securing the stakes within the stake receiver.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |