US4130270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge arrangement
Assignee: Sandvik AB
•
Filing: 1977-10-18
•
Granted: 1978-12-19
•
Expires: 1997-10-18
Abstract
Abstract A pair of pointed, rearwardly toothed wedge members are pivotally mounted at their rear or blunt ends to spaced positions on a drive handle head, whereby they may be successively and alternatingly driven into a saw cut in a tree by pumping the handle.
Inventors
- 👤 Einar W. Andersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:39
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/099; B; B25; B25B; B25B27/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
A wedge arrangement for forceably spreading apart the opposing surfaces of a saw cut made in a tree, comprising: (a) a first pointed wedge member having at least two spaced, parallel fingers, (b) a second pointed wedge member having at least one finger disposed in the space between said two fingers of the first wedge member, the second wedge member having substantially the same length as the first wedge member, (c) wood gripping means on the outer surfaces of each wedge member directed rearwardly from the respective points thereof for engaging the opposing surfaces of a saw cut in a tree, and (d) drive means coupled to the first and second wedge members for alternately applying an axial force to each of said members to successively advance the wedge arrangement into the saw cut in a step-by-step manner.
Claim 2
Dependent Claim
138 words
A wedge arrangement for forceably spreading apart the opposing surfaces of a saw cut made in a tree, comprising: (a) a first pointed wedge member having at least two spaced, parallel fingers, (b) a second pointed wedge member having at least one finger disposed in the space between said two fingers of the first wedge member, the second wedge member having substantially the same length as the first wedge member, (c) wood gripping means on the outer surfaces of each wedge member directed rearwardly from the respective points thereof for engaging the opposing surfaces of a saw cut in a tree, and (d) drive means coupled to the first and second wedge members for alternately applying an axial force to each of said members to successively advance the wedge arrangement into the saw cut in a step-by-step manner.
Claim 3
Dependent Claim
30 words
A wedge arrangement according to claim 1, further comprising guide means operative to guide the wedge members relative to one another in their axial direction arranged between said wedge members.
Claim 4
Dependent Claim
37 words
A wedge arrangement according to claim 2, wherein the mutually facing surfaces of the respective wedge members are so formed that the wedge members can be swung to a position in which said fingers cross each other.
Claim 5
Dependent Claim
19 words
A wedge arrangement according to claim 1, wherein the mutually opposing surfaces of said wedge members are slide surfaces.
Claim 6
Dependent Claim
26 words
A wedge arrangement according to claim 1, wherein the drive means comprises a lever having a head which is pivotally connected to the respective wedge members.
Claim 7
Dependent Claim
37 words
A wedge arrangement according to claim 3, further comprising a resilient means arranged between the two wedge members such that the wedge points of said wedge members in their unloaded state substantially in line with each other.
Claim 8
Dependent Claim
26 words
A wedge arrangement according to claim 3, wherein rearwardly extending gripping means are provided on the inner surface of each wedge member adjacent the points thereof.
Claim 9
Dependent Claim
51 words
A wedge arrangement according to claim 5, wherein the head is arranged to be rotated between a first position, in which the two wedge members lie closest together and a second position in which the end portions of the wedge members mounted on said head are moved away from each other.
References Cited (Backward Citations)
US2706920A
Cited
US4030700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |