US3645019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus equipped with worm means for digging a ditch or the like
Assignee: Individual
•
Filing: 1970-02-02
•
Granted: 1972-02-29
•
Expires: 1990-02-02
Abstract
Abstract An apparatus for digging a ditch by means of worms and capable of being secured to a vehicle, which apparatus comprises a group of at least four closely situated cooperating worms each disposed in an essentially upright position. Each of these worms has worm threading, with two respective ones of said worms cooperating with one another to define a front pair of worms and the remaining two worms cooperating with one another to define a rear pair of worms. Each worm of the front pair is in tandem with respect to a given worm of the rear pair. There is also provided means for imparting rotational movement to the worms of both pairs from the inside towards the outside when viewed from the front of the apparatus with each of the respective two worms which are arranged in tandem having the same direction of rotation and with their threading engaging with one another.
Inventors
- 👤 Raphael Mengis
- 👤 Hans Mengis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:02
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/04; E02F3/00; E02F3/04; E02F3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
An apparatus for digging a ditch by means of worms, such apparatus being capable of being secured to a vehicle, comprising a group of at least four closely situated cooperating worms each disposed in an essentially upright position, each of said worms having means defining worm threading, two respective ones of said worms cooperating with one another to define a front pair of worms and the remaining two worms cooperating with one another to define a rear pair of worms, and each worm of the front pair being in tandem with respect to a given worm of the rear pair, means for imparting rotational movement to the worms of both pairs from the inside towards the outside when viewed from the front of the apparatus with each of the respective two worms which are arranged in tandem having the same direction of rotation and with their threading engaging with one another.
Claim 2
Independent Claim
151 words
An apparatus for digging a ditch by means of worms, such apparatus being capable of being secured to a vehicle, comprising a group of at least four closely situated cooperating worms each disposed in an essentially upright position, each of said worms having means defining worm threading, two respective ones of said worms cooperating with one another to define a front pair of worms and the remaining two worms cooperating with one another to define a rear pair of worms, and each worm of the front pair being in tandem with respect to a given worm of the rear pair, means for imparting rotational movement to the worms of both pairs from the inside towards the outside when viewed from the front of the apparatus with each of the respective two worms which are arranged in tandem having the same direction of rotation and with their threading engaging with one another.
Claim 3
Dependent Claim
66 words
The apparatus as defined in claim 1, wherein each worm engages by means of its threading into the threading of the neighboring worms, and wherein both worms of the front pair of worms have the same magnitude of their threading pitch but opposite pitch sense, and wherein both of the rear pair of worms have the same magnitude of their threading pitch but opposite pitch sense.
Claim 4
Dependent Claim
23 words
The apparatus as defined in claim 2, wherein each worm engages with its threading into the threading of at least two neighboring worms.
Claim 5
Dependent Claim
77 words
The apparatus as defined in claim 2, wherein said rotational movement imparting means incorporates gearing means for operatiVely connecting the four worms with one another such that the rotational speed of the two worms of the rear pair of worms is a multiple of the rotational speed of the two worms of the front pair of worms and the pitch of the front pair of worms is steeper than the pitch of the rear pair of worms.
Claim 6
Dependent Claim
45 words
The apparatus as defined in claim 4, wherein the front pair of worms possess fewer threading that the rear paid of worms as a function of the relationship of the rotational speeds of the front and rear pairs of worms with respect to one another.
Claim 7
Dependent Claim
22 words
The apparatus as defined in claim 1, wherein the threading of the front pair of worms embodies teeth means at its periphery.
References Cited (Backward Citations)
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |