US3782722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable friction-resistance rope exercising device
Assignee: Individual
•
Filing: 1972-06-12
•
Granted: 1974-01-01
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Expires: 1992-06-12
Abstract
Abstract A variable friction-resistance rope exercising device having a shaft with an eyelet at one end and a turn knob mounted at the other end. The knob has apertures therethrough to enable free ends of a rope to be threaded through the apertures, a rope is spiralled around the shaft and through the eyelet so that a user can pull alternately on the ends against the friction developed between the rope and the shaft. The knob is spring biased outwardly away from the eyelet to connect with the shaft so that no rotation of the knob with respect to the shaft will be permitted during the pulling on the free ends of the rope. To increase the number of turns of the rope on the shaft the knob is pushed inwardly against the bias of a spring to disconnect the knob from the shaft and then the knob is rotated. When it is desired to release the frictional resistance, the user holds onto the knob and pulls on both free ends of the rope to pull the shaft toward the knob compressing the spring to disconnect the shaft from the knob.
Inventors
- 👤 R Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:21
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/012; A63B21/018; A63B21/00058; A63B21/00069
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
313 words
A variable friction-resistance rope exercising device, comprising: a friction shaft having an eyelet formed at one end thereof; a control knob connected to the other end of the shaft for turning movement relative to the shaft about the shaft axis and for limited axial movement relative to the shaft along the shaft axis; a spring means positioned between the shaft and the knob for biasing the knob axially away from the eyelet end to an extended axial position; said knob having two rope guide apertures extending axially therethrough; a single continuous section of rope having one flight extending into one of the apertures and along and in frictional engagement with the shaft between the knob and the eyelet in one axial direction and a second flight interconnecting the first flight through the eyelet and extending back along and in frictional engagement with the shaft in the other axial direction and out through the other guide aperture so that as the control knob is turned with respect to the shaft from a zero angular setting the rope flights will automatically, spirally wind about the shaft varying the sliding frictionalresistance between the rope and the shaft in relation to the degree of angular displacement of the knob from the zero angular setting; and a means for connecting the knob and the shaft, during an exercise program by the knob being forced to an extended axial position away from the eyelet under bias of the spring means thus enabling the knob to turn freely on to the shaft and for disconnecting the knob and the shaft by manually pushing the knob inwardly from the extended position toward the eyelet against the biasing of the spring means so that turning of the knob when connected to the shaft will vary the number of turns of rope and thus vary the frictional-resistance between the shaft and the rope.
Claim 2
Dependent Claim
313 words
A variable friction-resistance rope exercising device, comprising: a friction shaft having an eyelet formed at one end thereof; a control knob connected to the other end of the shaft for turning movement relative to the shaft about the shaft axis and for limited axial movement relative to the shaft along the shaft axis; a spring means positioned between the shaft and the knob for biasing the knob axially away from the eyelet end to an extended axial position; said knob having two rope guide apertures extending axially therethrough; a single continuous section of rope having one flight extending into one of the apertures and along and in frictional engagement with the shaft between the knob and the eyelet in one axial direction and a second flight interconnecting the first flight through the eyelet and extending back along and in frictional engagement with the shaft in the other axial direction and out through the other guide aperture so that as the control knob is turned with respect to the shaft from a zero angular setting the rope flights will automatically, spirally wind about the shaft varying the sliding frictionalresistance between the rope and the shaft in relation to the degree of angular displacement of the knob from the zero angular setting; and a means for connecting the knob and the shaft, during an exercise program by the knob being forced to an extended axial position away from the eyelet under bias of the spring means thus enabling the knob to turn freely on to the shaft and for disconnecting the knob and the shaft by manually pushing the knob inwardly from the extended position toward the eyelet against the biasing of the spring means so that turning of the knob when connected to the shaft will vary the number of turns of rope and thus vary the frictional-resistance between the shaft and the rope.
Claim 3
Dependent Claim
104 words
The exercising device as defined in claim 1 wherein the other end of the shaft has a reduced diameter stub section having a shaft shoulder and wherein the knob has a bore therein slidably receiving the stub section to enable the knob to be turned and pushed axially on the reduced diameter section of the shaft, said knob having a first cOunterbore formed therein forming a knob shoulder opposing the shaft shoulder and wherein the spring means includes a compression spring mounted about the reduced diameter section of the shaft and bearing against said shoulders to bias the knob to the extended axial position.
Claim 4
Dependent Claim
80 words
The exercising device as defined in claim 2 wherein the means for connecting and disconnecting the knob from the shaft includes mating elements on the stub section of the shaft and the knob which engage each other when the knob is in the extended axial position and which are disengage from each other when the knob is pushed to compress the spring and thereby move the knob from the extended axial position to enable the knob to be turned freely.
Claim 5
Dependent Claim
48 words
The exercising device as defined in claim 3 wherein the mating elements include a radial projection on the stub section of the shaft and a plurality of matching angularly spaced grooves in the knob for receiving the radial projection when the knob is in the extended axial position.
Claim 6
Dependent Claim
55 words
The exercising device as defined in claim 1 wherein the shaft has a prescribed diameter and wherein the knob has a second counterbore formed therein with a diameter slightly greater than the diameter of the shaft with a portion of the knob surrounding the counterbore and extending toward the eyelet and beyond the shoulder shaft.
Claim 7
Dependent Claim
64 words
The exercising device as defined in claim 1 further comprising a shroud encloses the eyelet and surrounds the shaft and terminates in a rim adjacent the knob in which the rim has a scale thereon corresponding to an angular knob setting and wherein the knob has a pointer means thereon opposite the scale for indicating the frictional-resistance of the device at various knob settings.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |