US3709047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear actuator system with reversing means
Assignee: Textol Systems Inc
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Filing: 1971-01-21
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Granted: 1973-01-09
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Expires: 1991-01-21
Abstract
Abstract A linear actuator system with reversing means including a housing with a lateral opening to receive a rotating shaft that passes through the opening. A plurality of wheels are disposed against the shaft for initiating and controlling linear movement of the housing with respect to the rotating shaft, with the wheels being resiliently urged against the shaft. When the housing approaches either end of the shaft, it is caused to reverse and move in the opposite direction by means of contact with one or more studs located on wires that pass through the housing with stud contact causing a control member to be pivoted and thereby reverse the direction of the wheels. This in turn causes a reversal of movement of the housing. Friction balls are also provided on another wire that passes through the housing with the friction balls assuring a satisfactory reversal of the control member.
Inventors
- 👤 W Zaruba
- 👤 J Sehnal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:43
CPC Classifications
F; F16; F16H; F16H19/00; F16H19/02; F16H19/025; A; A61; A61H; A61H15/00; A61H2015/0007; A61H2201/00; A61H2201/01; A61H2201/0119; A61H2201/0138; A61H2201/0149; A61H2201/16; A61H2201/1657; A61H2201/1664; A61H2201/1669; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A linear actuator system with reversing means including a housing having a lateral opening to receive a rotating shaft that passes through said opening, the opposite ends of said shaft being secured for rotation, a plurality of wheels associated with said housing and disposed against said shaft for initiating and controlling linear movement of the housing along said shaft, at least one stud located near the end of said shaft, a control member secured to said housing for controlling the pitch of said wheels with respect to said shaft for movement of said housing along said shaft, said control member having means to contact said stud as said housing approaches one of the ends of said shaft, said contacting means serving to automatically start reversal of the pitch of said wheels with respect to said shaft, and means adjacent to said shaft for engaging said control member to continue reversal of said pitch of said wheels to cause said housing to move in the opposite direction.
Claim 2
Dependent Claim
166 words
A linear actuator system with reversing means including a housing having a lateral opening to receive a rotating shaft that passes through said opening, the opposite ends of said shaft being secured for rotation, a plurality of wheels associated with said housing and disposed against said shaft for initiating and controlling linear movement of the housing along said shaft, at least one stud located near the end of said shaft, a control member secured to said housing for controlling the pitch of said wheels with respect to said shaft for movement of said housing along said shaft, said control member having means to contact said stud as said housing approaches one of the ends of said shaft, said contacting means serving to automatically start reversal of the pitch of said wheels with respect to said shaft, and means adjacent to said shaft for engaging said control member to continue reversal of said pitch of said wheels to cause said housing to move in the opposite direction.
Claim 3
Dependent Claim
18 words
The linear actuator system of claim 1 including friction balls assuring the complete reversal of said control member.
Claim 4
Dependent Claim
57 words
The linear actuator system of claim 2 wherein said studs and friction balls are mounted on support wires, said control member including rings through which said wires pass, one of said rings being adapted to abut said stud and the other ring member being adapted to pass about one of said friction balls in a friction action.
Claim 5
Dependent Claim
23 words
The linear actuator system of claim 3 wherein the internal surface of said friction rings is somewhat convex with a plastic bearing material.
Claim 6
Dependent Claim
64 words
The linear actuator system of claim 1 including pin members extending from said control member, and said means adjacent said shaft comprising a cam secured adjacent at least one end of said shaft, said cam being adapted to contact at least one of said pin members to assist in the movement of said control member in order to reverse the direction of said wheels.
Claim 7
Dependent Claim
130 words
A linear actuator including a housing having a lateral opening to receive a rotating shaft that passes through said opening, said housing closely surrounding said shaft and having a plurality of annular projections extending radially with respect to said shaft from said housing and each projection having a cylindrical bore, a plurality of holders each having a wheel mounted therein, said holders each having a cylindrical flange which is journalled over one of said projections with said wheel extending into the bore of said projection and means for resiliently urging each of said holders toward said shaft to cause said wheels to bear against the outer periphery of siad shaft, the pitch of said wheels being rotatable with respect to said shaft by rotation of said holders about said projections.
Claim 8
Dependent Claim
130 words
A linear actuator including a housing having a lateral opening to receive a rotating shaft that passes through said opening, said housing closely surrounding said shaft and having a plurality of annular projections extending radially with respect to said shaft from said housing and each projection having a cylindrical bore, a plurality of holders each having a wheel mounted therein, said holders each having a cylindrical flange which is journalled over one of said projections with said wheel extending into the bore of said projection and means for resiliently urging each of said holders toward said shaft to cause said wheels to bear against the outer periphery of siad shaft, the pitch of said wheels being rotatable with respect to said shaft by rotation of said holders about said projections.
Claim 9
Dependent Claim
38 words
The linear actuator of claim 6 wherein said housing includes a pair of planar walls which extend parallel to said shaft on diametrically opposed sides thereof, each of said walls including one of said radially extending annular projections.
Claim 10
Dependent Claim
46 words
The linear actuator of claim 6 wherein said walls further include at least one opening, a pair of plates, said plates being secured together by a fastening means extending through said openings in said walls for maintaining said holders with said wheels urged against said shaft.
Claim 11
Dependent Claim
30 words
The linear actuator of claim 6 wherein said plates are connected to said holders by needle bearings which act to reduce the frictional engagement between said plate and said holder.
Claim 12
Dependent Claim
30 words
The linear actuator of claim 6 wherein said cylindrical flange of said holders is flared so that ball bearings can be utilized between said cylindrical flange and said annular projection.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |